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Cng ty CP Sng 19 BIN PHP THI CNG n Ngyn 3,CT9 ,M nh,T Lim, H Ni Cng trnh :D n tuyn ng Nam Qung Nam G I

Tell: 04.39949882 Fax :0437876375 Hng mc :Thi cng gi thu R4-7; R5-1; R5-2

Web: www.songda19.com.vn a im :Huyn Nam Tr My Qung Nam

Ch u t :S giao thng vn tI Qung Nam

Ban QLDA ng Nam Qung Nam-Tr My-Tr Bng

Thuyt minh :

Bin PhpT chc thi cng

Cng trnh :d n TXD Tuyn ng nam qung nam (tam thanh tam k tr my- tc p - k t) giai on 1.Hng mc : khc phc thit hi nn, mt ng v cng trnh trn tuyn do ma bo gy ra,Thuc phm vi gi thu-R4-7(Km 138+000 - Km 139+0.00);-R5-1(km139+000 - km 140+500) ; -R5-2(km 140+500 - km142+000)

a im : huyn nam tr my, tnh qung nam.

Ni DUNG Thuyt MINH Bin Php THI CNG :

I.

cc cn c lp thit k t chc thi cng.II. gii thiu chung v cng trnh.III. qui m, cp hng v cc tiu chun k thut.

IV. yu cu k thut thi cng.

V. T chc thi cng v tng mt bng.Vi. Bin php thi cng chi tit.vii. bin php qun l bo m cht lng cng trnh.viii. cng tc an ton lao ng v phng chng chy n.x. cng tc an ninh trt t v v sinh mi trng.x. S t chc hin trng v thuyt minh.xi. s tin thi cng v biu nhn lc.

Xii. Bn V Bin Php THI CNG

Chng I : cc cn c lp thit k t chc thi cng :1. H s thit k k thut thi cng do Cng ty C phn T vn Xy dng Cng trnh Giao thng 5 lp gm: Thit k bnh on tuyn; Thit k trc dc on tuyn; Thit k trc ngang chi tit on tuyn; Thit k bn v thi cng ca gi thu R4-7, R5 -1 v R5-22. Cn c vo bng khi lng mi thu;3. Cn c cc qui trnh, qui phm thi cng nn mt ng, tng chn r ;4. Cn c vo cc qui trnh k thut trong n do Cng ty C phn T vn Xy dng Cng trnh Giao thng lp v yu cu ca H s mi thu;5. Cn c vo mt bng thc t xy dng cng trnh;6. Cn c qui phm k thut an ton v bo h lao ng c nh nc ban hnh;7. Cn c vo kinh nghim cng nh nng lc ca nh thu tng thi cng cc cng trnh tng t.Sau khi nghin cu H s mi thu Nh thu trnh by tm tt thuyt minh k thut, bin php t chc thi cng cng trnh vi ni dung nh sau:Chng ii : gii thiu chung v cng trnh

1.Thng tin v d n :

Tuyn ng Nam Qung Nam c im u ti l trnh ti Km0+00(Tam Thanh Tam K, Qung Nam, im cui ti l trnh Km210+00(k T - kon Tum), tng chiu di tuyn khong 210km. L tuyn c o nhm phc v giao thng i li v pht trin kinh t gia 2 vng Kon Tum v cc huyn pha Nam tnh Qung Nam, d n ng Nam Qung Nam Giai on 1(Km109+670- Km147+300) ang c thi cng xy dng khn trng.Sau t ma l thng 10 nm 2010, trn tuyn ng xut hin nhiu v tr st trt gy h hng phn nn, mng, taluy v mt s cng trnh thi cng, trong gi thu R5-1 l mt trong nhng gi thu chu nhiu nh hng nht vi 3 v tr st trt quy m ln, tng khi lng t b st trt c tnh ln n vi trm ngn m3. Do khi lng t st trt qu ln nn tuyn ng b ch tc ton b v thi gian khc phc bo l thng tuyn ko di n 2-3 thng.Vic x l cc v tr st trt trn tuyn Nam Qung Nam l rt cn thit v cp bch nhm m bo vic thi cng tin hnh trong ma kh, sm a tuyn ng vo khai thc p ng nhu cu giao thng bc bch ca khu vc min ni pha Nam tnh Qung Nam.

2. Ch u t :

-Ch u t : S giao thng vn ti Qung Nam

- i din ch u t : Ban QLDA ng Nam Qung Nam - Tr My -Tr Bng.

3. Gii thiu v gi thu :

3.1.Thng tin k thut cc gi thu :

Tn gi thuim uim cuiTng chiu di (M)B rng (M)Kh cu (M)

Nn ngl gia c

R4-7Km 138+882.42Km 139+0.00117,587,52x0,58

R5-1Km 139+0.00Km 140+500117,587,52x0,58

R5-2Km 140+500Km 142+0.00117,587,52x0,58

3.2.a hnh, a mo :a hnh khu vc on tuyn i qua ht sc phc tp v chuyn tip nhiu dng a hnh, khu vc u tuyn c dng ng bng trc bin, khu vc gia tuyn c a hnh trung du v cui tuyn c dng a hnh ni cao. Nhn chung ton tuyn u b phn ct mnh bi h thng sng sui t nh n ln trong khu vc, b mt a hnh tng i bng phng khu vc u tuyn sau b phn ct v c dc ln gia tuyn n cui tuyn. on tuyn i qua vng c kin to phc tp c trng bi cc t gy v cc thm trt c tn ti trong giai on trc, dc dc v dc sn ln. Qua thc t cho thy a hnh, a mo khu vc tuyn i qua phc tp3.3.Kh hu: Tuyn ng Nam Qung Nam thuc vng kh hu nhit i gi ma nng m min Ty Trung B, c bao bc bi sn ng dy Trng Sn pha Ty. Kh hu c nt c trng sau: Nhit : Nhit trung bnh hng nm vo khong 24,5c, cao nht 38,10c, thp nht 10,40 C.

Ma: Khu vc tuyn i qua c nh gi l mt trong nhng vng c lng ma ln trong c nc. Lng ma trung bnh nm: 827.50mm. S ngy ma trung bnh ton nm vo khong 130 150 ngy. Trong ma ma lng ma phn b tng i u cc thng v cc i vo thng 10 - 11, chim 70 80% lng ma c nm, c bit trong thng 10/2010 va qua theo s liu quan trc thu vn ca trm thu vn Trung Trung B cho thy lng ma trn khu vc nghin cu t >1000mm. Gi: Hng nm c 2 hng gi ch o: V ma ng, hng gi thnh hnh l hng Bc vi tn sut 20 30%, ma h hng gi thnh hnh l hng ng, tn sut khong 40 50%. Tc gi trung bnh khong 3,2 3,4m/s. Trong nm thng c 2 3 cn bo, c bit c lc ln n 5 6 cn bo trong 1 nm. m: m trung bnh nm ca khng kh khong 88%. Ma m trng vi ma ma, ko di t thng 9 12, thng 1 2, trung bnh vt qu 80%. Thng kh nht l thng 4 & 5, m trung bnh khong 83%.

3.4. a cht:

3.4.1.c im v cu trc a cht:Qua kt qu kho st a cht ca nhiu giai on kt hp Bn a cht D - 49 A (Qung Ngi) t l 1/500.000 cho thy on tuyn i qua cc thnh to a cht ch yu nh sau:

Phc h Bn Ging - Qu Sn ((41 -(41 bq): Grabro, irit, Grabroirit, granit. Phc h phn b t th trn Tr My n khong Km75 thuc tuyn Nam Qung Nam.

Phc h Bn Ching ( ((51 bc): Granosyenit, syenit, granit dng porphyr (pha I). Phc h c dng mch xm nhp vo phc h Chu Lai - Ba T v h tng Bn Ging Qu Sn. Din phn b nh khong t Km75 n Km79 thuc tuyn Nam Qung Nam.

Phc h Chu Lai - Ba T ((2cb): Granoirit, granit, granit - migmatit. Phn b khong t Km79 ti Km83+900 trn tuyn. Phc h bao gm cc kiu Ba T v kiu Chu Lai Sa Hunh. Chng c ranh gii hoc chuyn tip hoc r rng vi cc thnh to trm tch bin cht vy quanh; cc khi c din l va n ln. Phng cu to gnai ca granitoit thuc phc h trng vi phng phn phin chung ca vy quanh.

H tng Sng Tranh (PR1 st): Gnai v phin Amphibol - biotit, amphibolit, migmatit. H tng ny phn b trn tuyn t Km83 + 900 n ht phm vi nghin cu.

3.4.2.Kin to:Kin to trong khu vc on tuyn i qua pht trin rt mnh m li khu vc 04 t gy pht trin theo hng Ty Bc ng Nam. Km theo h thng t gy ny l qu trnh pht trin cc mch, khi macma xm nhp trong vng (xem trong bn a cht D-49-A (Qung Ngi) t l 1/500.000) v cc mng sng sui dy c vi dc ln, lng sng hp.

Chng iii:

cp hng &giI php hng mc cng trnh.1. Cp hng k thut:1.1.Cp ng :

ng cp IV min ni theo tiu chun thit k TCVN 4054-85 c chm chc.1.2.Cc tiu chun k thut ca ng theo thit k :

- Cp ng: ng cp IV min ni theo TCVN 4054-85 c chm chc

- Vn tc thit k V=40km/h

- Bn knh ng cong nm ti thiu: 60m (chm chc 30m)

- Bn knh ng cong ng li ti thiu: 1000m

- Bn knh ng cong ng lm ti thiu: 1000m (chm chc 300m)

- dc dc ln nht: 8% (chm chc 12%)

- Kt cu mt ng: cp cao th yu A2, Eyc 980daN/cm2

- Cng trnh trn tuyn: thit k vnh cu

- Tn sut thit k: tuyn, cng v cu nh: 4%, cu trung: 2%, cu ln: 1%

- Ti trng thit k: H30-XB80, on ngi 300kg/m2, ng t cp 7

- B rng mt ng 6,5m

- B rng nn ng 7,5m

- B rng l gia c: 2x0,5m, l t: 2x0,5m

- Kh cu: 0,5+7+0,5=8m.

2. Cc gii php hng mc cng trnh :2.1.Bnh tuyn v trc dc tuyn :- Hng tuyn da vo h s thit k thi cng c ch u t ph duyt. Cng vi mt s bin bn iu chnh, thng nht gia cc bn.Nhm bo m an ton trn tuyn v cc bn c thng nht.2.2.Trc ngang tuyn :Trc ngang tuyn thit k nh sau :

+ B rng mt ng 6.5m

+ B rng nn ng : 7.5m+ B rng l gia c : 2x0.5m

+ dc nn ng ; i = 3%

+ dc l ng : i = 4 %

+ on c rnh thot nc c mi dc l 1:1 v 1:2

+MI ta luy c p r v c mI dc : m = 1:12.3. Nn ng :

Ty theo yu cu tng on theo thit k m tin hnh thi cng ph hp. o b cc lp t n cao yu cu thit k. m cht 1 lp K=0.98 trc khi cp phi dm loi II. i vi cc on ng p th c vn chuyn t mI ta luy dng qua mi ta luy m.

2.4.Kt cu mt ng :

Cc lp kt cu mt ng bao gm : Lp 01 : B tng xi mng M300 1x2 ; dy 24 cm

Lp 02 : Lp giy du pht nha ng

Lp 03 : Lp cp phi dm loi II, dy 15 cm Lp 04 : Lp t m cht K98 m cht dy 30 cm (i vi kt cu mt ng BTXM trn nn o, p t ).

B tr mt bng v kch thc cc tm BTXM:

Kch thc tm in hnh trn tuyn thng : 3.25x6m

Kch thc tm trong on ng cong c cng thm on m rng W ca tng on.2.5.Tng chn r :

- Gi R5-1 :

+Thit k tng chn r H=2-3m chn taluy dng;

+on 1 : Km 140+000-Km140+208.03 di L=191.00m

+on 2 : Km 140+289.64 Km140+343.56 di L= 58m

+on 3 : Km140+384.81- Km140+408.7 di L=24mKt cu c th nh sau :

+Thn tng bng r xp bc, dng loi r m km

+Mng tng bng BT Mc 150 4x6.

Cc gi thu khc theo tng v tr m c tng chn r H=2-3-6(m)Chng IV: yu cu k thut thi cng

1 . Cc tiu chun c p dng :

Thi cng cc hng mc trn tuyn i hi yu cu k thut theo cc tiu chun, quy chun Vit Nam sau:TTTn quy chun, tiu chunK hiu

1Quy trnh kim tra nghim thu cht ca nn t trong ngnh GTVT22 TCN 02-71

2Quy trnh thi cng v nghim thu lp cp phi dm trong kt cu o ng t22 TCN 334-06

3Quy trnh thi cng v nghim thu lp cp phi (si cui) gia c xi mng trong kt cu o ng t22 TCN 245-98

4Quy trnh thi cng v nghim thu lp ct gia c xi mng trong kt cu o ng t22 TCN 244-98

5Quy trnh thi cng v nghim thu mt ng b tng nha22 TCN 249-98

6Quy trnh thi cng v nghim thu mt ng nha dng nha di hnh thc nha nng22 TCN 271-01

7Quy trnh thi cng v nghim thu mt ng nha di hnh thc nh tng22 TCN 10-77

8Quy trnh th nghim xc nh mun n hi chung ca o ng mm bng cn o vng Benkelman22 TCN 251-98

9Lu bnh lp22 TCN 254-98

10Trm trn b tng nha nng22 TCN 255-99

11Quy trnh k thut xc nh dung trng ca t bng phng php rt ct22 TCN 13-79

12Quy trnh thi cng v nghim thu bc thm trong xy dng ng trn t yu22 TCN 236-97

13Quy trnh th nghim xc nh nhm mt ng bng phng php rc ct22 TCN 65-84

14Quy trnh k thut o bng phng mt ng bng thc di 3 mt22 TCN 16-79

15Quy trnh thi cng v nghim thu t gia c vi bng my Bmag22 TCN -95

16Tiu chun k thut thi cng v nghim thu mt ng dm v dm cp phi lng nha nh tng a xt22 TCN 250-1998

17Quy trnh th nghim cu22 TCN 170-87

18T chc thi cngTCVN 4055-85

19Kt cu b tng v b tng ct thp lp ghpTCVN 4452-87

20Quy trnh thi cng v nghim thu dm cu b tng d ng lc22 TCN 247-98

21Hm ng st v hm ng t - TC thi cng v nghim thu TCVN 5428-88

22Kt cu b tng v b tng ct thp ton khi - Quy phm thi cng v nghim thuTCVN 4453-1995

23Quy trnh thi cng v nghim thu cu cngQuyt nh s 166-Q ngy 22/2/75

24Quy trnh th nghim t gia c bng cht kt dnh vi xi mng22 TCN 59-84

25Quy trnh th nghim b tng xi mng22 TCN 60-84

26Quy trnh th nghim b tng nha22 TCN 63-84

27Quy trnh th nghim vt liu nha ng22 TCN 63-84

28Quy trnh th nghim cng khng p ca b tng bng dng c HPS22 TCN 68-84

29Quy trnh th nghim xc nh mun n hi ca vt liu gia c cht kt dnh v c22 TCN 72-84

30Tiu chun phn loi nha ng c (bitum c) dng cho ng b22 TCN 227-95

31Gi cu cao su ct bn thp22 TCN 217-94

32Quy trnh th nghim cc ch tiu c l ca 22 TCN 57-84

33Quy trnh th nghim bt khong cht dng cho b tng nha ng22 TCN 58-84

34Quy trnh phn tch nc dng trong cng trnh giao thng22 TCN 61-84

35Quy trnh th nghim phn tch nhanh thnh phn ht ca t trong iu kin hin trng22 TCN 66-84

36Quy trnh th nghim xc nh nhanh m ca t bng phng php th tch22 TCN 67-84

37Quy trnh th nghim xc nh cng p ch ca vt liu ht lin kt bng cc cht kt dnh22 TCN 73-84

38Ct xy dngTCVN 337-86 n 346-86

39Ct xy dng - phng php xc nh hm lng micaTCVN 4376-86

40Ct, , si xy dngTCVN 1770-86 n 1772-86

41Ct tiu chun th xi mngTCVN 139-91

42t xy dng - Cc phng php xc nh tnh cht c - l ca t trong phng th nghimTCVN 4195 n 4202-1995

43t xy dng TCVN 2683-91

44t xy dng - Phng php chnh l thng k cc kt qu tnh cht c - l ca t20 TCN 74-87

45Nc cho b tng v vaTCVN 4506-87

46Xi mngTCVN 4029-85 n 4032-85

47Xi mngTCVN 4787-89

48Quy trnh ly mu vt liu nha dng cho ng b, sn bay v bn bi22 TCN 231-96

49Sn tn hiu giao thng dng lng trn nn b tng xi mng v b tng nha64 TCN 92-95

50t xy dng - qui phm thi cng v nghim thuTCVN 4447-87

51Thi cng v nghim thu cc khoan nhiTCVN 326-2004

Ngoi cc qui trnh qui phm trn y, nh thu phi tun th cc tiu chun, qui trnh, qui phm thi cng v cc vn bn php lut hin hnh, theo ng bn v thit k.2 . Mt s yu cu k thut ca hng mc :2.1. Thi cng b tng :

Khi lng b tng hng mc :Tn cng tcGi thun vKhi lng

BTXM M300 1x2 mi ni tip gipR4-7m30,78

BT M250 1x2 R4-7m3868,02

BT M100 4x6 R4-7m349,27

BT M150 2x4 R4-7m357,96

Mt ng BTXM M300 1x2R4-7m3183,42

Mt ng BTXM M300 1x2R5-1m32.467,28

BT M150 2x4 R5-1m3279,08

BT M150 4x6 R5-1m3523,48

Mt ng BTXM M300 1x2R5-2m32.463,01

BT M150 4x6R5-2m3445,51

B tng M150 2x4 gia c lR5-2m360,60

BT M150 4x6 R5-2m3224,75

Phi s dng ngun gc vt liu theo ng thit k cp phi b tng c TVGS chp thun. Trc khi a b tng vo kt cu Nh thu tin hnh kim tra st ca b tng bng thit b o st hnh nn. st m bo mi c a vo kt cu, nu st ln hn hoc b hn so vi thit k cn iu chnh ngay lng nc cho vo my trn.

Lp cc phiu b tng cho tng t ghi r ngy thng thc hin, c mu i chng kim tra cng b tng trong mi t .

B tng c trn bng my theo ng t phi c chp thun, thi gian trn khng ko di qu 5 pht cho mi m trn, khng c tng gim tc quay ca my trn so vi tc quy nh.

.

Chng v: T chc thi cng v tng mt bng1. Cn c lp thit k t chc thi cng:- Cn c vo h s mi thu ca Ban QLDA ng Nam Qung Nam-Tr My-Tr Bng- Cn c vo cc quy trnh, quy phm hin hnh ang p dng cho cc cng trnh nn, mt ng, cu, cng Vit nam.

- Cn c iu kin thi cng thc t ca tuyn ng v iu kin khu vc cng nh nng lc, iu kin v kinh nghim thi cng ca nh thu.

- Cn c vo kt qu kho st hin trng do nh thu thc hin vo thng 7 nm 20112.Khi lng chnh cc hng mc thi cng :

Gi thu R4-7:

ttHNG MC CNG VICNKHI

VLng

1Tng chn b tngm117.58

2Thm r m116

3o t, m351.176

4Mt ng BTXM M300 1x2m2764,25

Gi thu R5-1 :ttHNG MC CNG VICN vKHI

lng

1Mt ng BTXM M300 1x2m210.280,33

2o t ,m383.651,8

3Thm r dy 30cmm139,94

4Gia c mi hc xy :m2121,82

5Tng chn r H=6mm172,46

6Tng chn r H=2mm191

Gi thu R5-2:

ttHNG MC CNG VICN vKHI

Lng

1Mt ng BTXM M300 1x2m210.262,54

2o t, m3101.548,41

3Tng chn r H=2mm453

3. T chc thi cng tng th:

3.1. Thi gian thi cng cc gi thu l :179 ngy k t ngy pht lnh khi cng.

3.2.B tr tng mt bng c th hin bn v :Tng mt bng b tr cng trng

3.3. Cht lng cng trnh t c cht lng tt, gi thnh thp nht, m bo cc yu v k thut, m thut, v sinh mi trng.

3.4. An ton lao ng: m bo tuyt i an ton cho ngi v thit b xe my trong qu trnh thi cng cng nh vic m bo giao thng thng sut trn tuyn thi cng.

Mt bng s dng cho cng trnh t nht, khng lm nh hng ti cnh quan mi trng xung quanh.

m bo khng lm nh hng ln ti iu kin sinh hot ca nhn dn trong khu vc thi cng.

4. Bin php thi cng tng th:

- B tr t chc thi cng hp l, chn phng n t chc thi cng tin tin ph hp vi iu kin hin ti. Hn ch ti a chiu di thi cng ca dy chuyn chuyn nghip v chiu di phn on thi cng trnh lm cn tr giao thng.- Lp tin thi cng chi tit cho tng hng mc cng trnh iu hnh, ch o sn xut m bo hon thnh tin chung mt cch chc chn.

- B tr hng thi cng hp l, khoa hc.

- Tin hnh thi cng th im t c cc yu cu k thut v c s chp thun ca t vn gim st t rt ra nhng thng s, phng php ph hp vi iu kin c th ca tuyn thi cng. Ch khi qu trnh thi cng th im ny mi tin hnh thi cng ng lot.

- B tr y cc thit b phng h, ro chn, barie, bin bo... v ngi hng dn giao thng m bo giao thng thng sut.

- B tr xe ti nc chng bi thng xuyn, hn ch thp nht mc nh hng ti mi trng sinh thi v cc hot ng bnh thng ca nhn dn vng ln cn.

- Lin h cht ch vi chnh quyn a phng, cc c quan qun l giao thng, cc c quan chc nng phi hp gii quyt cc cng tc v an ton, an ninh, bo m giao thng, thu li ni ng, l lt trong khu vc thi cng.

5. Cc ngun cung cp vt t, vt liu:- mua ti m km155+385. c kch c theo quy nh ca h s thit k, dng xe t t ch v chn cng trnh.

- Ct vng, en mua ti khu v Nam Tr My, ct sch khng ln tp cht theo ng quy nh, dng xe t t ch v chn cng trnh.

- t p nn ng tn dng trn cc mi o c K s t vn gim st kim tra cho php dng p, dng cc loi my chuyn v v tr cn p.- Xi mng mua ti cc i l Xi mng TP Nng , vn chuyn v cng trng bng t.

- Thp mua ti i l Thp TP Nng, vn chuyn v cng trng bng t.

- Cc loi vt t, vt liu khc c mua ti cc v tr ln cn nhm m bo ngun cung cp vt liu c lin tc v ch ng.

6. T chc b my cng trng :

6.1. Lp ban iu hnh cng trng:

Ch o chung thi cng trn tuyn, quan h lm vic vi Ban qun l d n, T vn gim st, a phng gii quyt cc vn mt bng, th tc, vn bn nghim thu. Ban iu hnh cng trng gm c:

+01 ch huy trng:iu hnh chung d n.

+01 Ch huy ph:

Ph trch k thut, ATL,tin .

+Cc nhn vin:

Gm k thut, k hoch, th nghim.

+T kho st.

Ban iu hnh c trang b:

+Phng tin: t, xe my, cc thit b o c.

+ Vn phng lm vic: in thoi, my vi tnh, my in.

+ Phng th nghim hin trng.

6.2. Thnh lp v b tr i sn xut

Cng trng c b tr 3 i sn xut:

+ i thi cng ph .

+ i thi cng xy lp.

+ i thi cng c gii.

T chc ca 1 i sn xut bao gm:

+ 1 i trng: iu hnh sn xut trn on tuyn, cung ng iu hnh vt t, my mc thit b thi cng, nhn cng.

+ 1 i ph ph trch k thut

+ 1 thng k - k ton: Theo di vt t, nhn cng.

+ 1 nhn vin ph trch an ton lao ng, an ton giao thng.

+ 2 cn b k thut hin trng.

+ Cc cng nhn k thut lnh ngh,

+ Cc my mc thit b cn thit cho thi cng: My i, my o, t, lu, m cc, my san, xe ti nc v cc thit b phc v cho thi cng lp mt ng.

6.3. Lp k hoch thi cng:

-Bn thi cng sau khi nhn bn giao tuyn tin hnh lp k hoch thi cng chi tit theo tun, hng thng v k hoch hon thnh theo tin .

-Hng ngy cc k s, k thut cc i thi cng phi nm c khi lng thi cng thc hin trong ngy v nu pht hin ra nhng bt hp l trong thit k so vi thc t th cc cn b k thut bo co k s t vn gim st xin kin gii quyt kp thi.

- gii quyt xong tng hng mc ca cng vic th sau khi thi cng xong phi c k s t vn gim st chp thun v k vo bin bn kim tra mi c thi cng hng mc tip theo.

6.4. Xc nh v tr t tha:

V tr t tha cn c xc nh v phi m bo cc yu cu sau:

Xe vn ti ra vo an ton. t ra khng (hoc t) nh hng n vic sn xut nng, lm nghip.

Khng nh hng n dn c v m quan khu vc.

Khng nh hng tuyn ng sau khi thi cng xong.

Khng lm thay i xu n ch thy vn (dng chy) trong khu vc.

C ly vn chuyn kinh t.

c s ng ca a phng.

Cha c nhiu t, tng ng vi khi lng t tha.

C ly vn chuyn t i hp l.

7 - Trnh t thi cng:

Bc 1: Thc hin cng tc chun b.

Bc 2: Thi cng cng, nn ng.

Bc 3: Thi cng ng BTXM.

Bc 4: Thi cng tng chn, r .Bc 5: Thi cng mi taluy, rnh dc.

Bc 6: Thi cng h thng ATGT v hon thin.

Chng Vi: Bin php thi cng chi tit

1.Cng tc chun b :1.1 Cng tc chun b chung:

Sau khi giao, nhn tuyn, nh thu tin hnh ngay cng tc chun b. Thi gian d kin hon thnh 5 ngy. Cng tc ny bao gm:

- Du cc ra ngoi phm vi thi cng, ng thi vi vic xc nh phm vi mt bng xy dng tuyn ng.

- o c, thng k chi tit khi lng cn gii phng mt bng lp bo co trnh ch u t.

- Lp cc mc khng ch v cao v mt bng m bo cho qu trnh thi cng v kim tra c d dng.

- i chiu gia thit k v thc a, lp bo co trnh ch u t v t vn thit k nhng kin ngh v sai st (nu c).

- Xc nh phm vi o, p nn ng, v tr ng trnh, m cu, bi c dm.

- Lp tin thi cng chi tit cho tng hng mc cng trnh, trnh ch u t .

- Lin h vi chnh quyn a phng xin php v tin hnh xy dng ln tri, kho tng, bn bi, tp kt xe my thit b, nhn lc ti cng trng.

- K kt cc hp ng v vic cung cp vt liu sn xut, cc cu kin b tng c sn, xi mng, st thp, nha ng, bin bo, cc tiu....

- Thc hin cc th nghim xc nh tnh cht c l ca cc vt liu xy dng d kin a vo s dng cho cng trnh.

- Thit k thnh phn cp phi va xy v va b tng.

- Chuyn qun, chuyn my n cng trng (lm khn trng tn dng thi tit thun li)

- Xy dng ln tri cho cn b ch huy cng trng, li xe li my, cng nhn cc i.

+ Ban ch huy cng trng iu hnh chung:100m2

+ Cho cng nhn:300m2

+ Nh kho:300m2

+ Bi tp kt xe my, vt liu, c vt liu:400m2

1.2.Nhn lc cho hng mc :

+ K s cng trnh giao thng

:03 ngi

+ Cn b k thut thi cng

:03 ngi

+ B my cn b qun l v y t

:01 ngi

+ Cng nhn KTXD (rnh, mng, cng) :40 ngi

+ Th c kh st +in + cng nhn trm

:35 ngi

+ Th li my, li xe

:17 ngi

+ Cng nhn th ng, bc 3 - 6/7

:30 ngi

1.3.My mc thit b :

Vic a my mc thit b phc v cho thi cng cng trnh l yu t hng u. V n quyt nh v nng sut, cht lng, an ton v m bo tin . My mc thit b thi cng nn mt ng, cng trnh, cng.

2.Thi cng cng, tng chn r :

2.1.Thi cng cng :

Cng vic m t trong phn ny bao gm vic sn xut v lp t cng trn b tng ct thp hoc ti ch, ng knh 150; nh ghi trn cc bn v thit k trong h s thit k .

Cng vic ny bao gm c mi cng vic o mng, m y mng, lp mng ph hp vi v tr, cao , dc v cc mt ct ghi trn bn v thit k chi tit.

2.1.1.Yu cu chung khi thi cng cng :

Cc ng cng phi t ng v tr, thng vi trc dc ca cng v ph hp vi dng chy t nhin.Mt trong v mt ngoi ca ng cng phi bng phng v nhn, ton b ng ng khng c c vt nt, vt rn, vt r t ong, ch st v b mt s s.

Sai s cho php v kch thc s theo quy nh trong quy trnh thi cng v nghim thu cu cng.Trn mi phn ca ng cng b tng c sn phi ghi cc thng s:

- Loi ng cng v ng knh trong.

- Ngy c.

- Tn hoc nhn hiu ca ch xng sn xut.

- S l ca sn phm.

- Cc kt qu th nghim ca sn phm.

- Tn v k hiu bn v in hnh cc cu kin cng trn p dng.

2.1.2.Trnh t cc bc thi cng cng :

2.1.1.1 Cng tc chun b: Dng my cao c, kinh v xc nh chnh xc v tr v phm vi thi cng cng.

Vn chuyn v tp kt ng cng c sn n v tr cu lp : Trong qu trnh cu v vn chuyn phi dng g ke cn thn trnh gy ra hin tng sc m, v khi vn chuyn, cu lp.

2.1.1.2 o h mng:

Dng my o o cch cao thit k 30cm, sau dng nhn lc tip tc o n cao thit k. Nu a cht khng n nh b tr chng vch.

H mng o c chiu rng khng vt qu ng knh ngoi ca ng cng cng thm mi bn 300mm d dng vic lp mng. Sa san kch thc, cao cho ng theo yu cu ca thit k, mi t vn gim st kim tra nghim thu thi cng lp mng.

2.1.1.3.Thi cng lt mng:

Khi h mng c o xong, khi c php thi cng phi thc hin ngay thi cng lp lt mng, t ng cng v lp t.

Thi cng lp lt mng theo ng kt cu v yu cu cho tng v tr cng.

2.1.1.4.Lp t cng: S dng my cu 5-10T v my o lp dng cng .ng cng c t cn thn ng hng, ng dc v cao ch trong h s thit k. Cc ng cng ni vi nhau bng g t khp li vi nhau. Hng ng t sao cho tim ng cng phi trng vi nhau, thng, ngang bng.

Mi ng cng khng thng hng hoc b ln qu mc sau khi t phi c ly ln v t li cho ng yu cu ca thit k.

2.1.1.5.Thi cng mi ni :

Cc mi ni c nht kn bng loi va mt phn xi mng pooc lng vi 2 phn ct theo trng lng. Lng nc trong hn hp va to nn mt hn hp va c qunh, d thao tc v khng vt qu 27 lt/ 50kg xi mng.B mt tip xc c v sinh sch s, lm m khi bt u trt va. Sau khi nht va vo ton b mt pha trong ca khe ng cng, g ni ng cng s c lp vo ng v tr. Nhng ch trng cn li trong khe ni c nht kn bng va vng quanh mi ni. Pha trong ca mi ni c bo dng bng bao ti v gi m thng xuyn trong t nht 3 ngy.

Bn trong ng cng c lau chi sch bi, va tha v cc vt liu khc trong qu trnh t ng v bo m sch s khi hon thnh cng vic.

2.1.1.6. Thi cng b tng tng u, tng cnh, gia c thng h lu:

-Lp dng vn khun theo ng kch thc hnh hc thit k..-Thi cng b tng M150.-Gia c sau cng bng bc tiu nng v r KT(2x1x0.5).

2.1.1.7. Lp t: Vic lp t ch tin hnh sau khi c s chp thun ca T vn gim st.

t p tng lp mng 20 cm, p ng thi cho c hai bn cng v c m cht.

t dng p phi sch, khng ln c rc v c s ng ca k s T vn.

2.1.1.8. Hon thin nghim thu: Khi thng thng, h lu, dn v sinh sch s.

2.2.Thi cng tng chn, r :2.2.1.Thi cng tng chn:

2.2.1.1. nh v v o h mng:

nh v chnh xc v tr thi cng.

o t bng my o kt hp vi th cng.

2.2.1.2. Thi cng b tng tng chn:

- Cng tc chun b:

+ Cm cc xc nh cc chn tng, cao hin thi ti v tr cc mt ct ngang trong bn v.

+ Vt liu dm , xi mngc vn chuyn n tp kt ti v tr cng trnh, tt c phI c chng ch vt liu v phi c s ng ca k s t vn mi c a vo s dng.

+ B tng c trn bng my theo ng t phi c chp thun.

+ Vn khun c lp t ng theo kch thc hnh hc thit k ca tng chn.

- Thi cng b tng:

+ Trn hn hp b tng: m bo cht lng thi cng, ton b hn hp b tng s c trn bng my theo ng t l cp phi c xc nh.

+ Ri hn hp b tng:

Trc khi , b mt vn khun s c lm sch. Nc tha trn b mt s c lau kh.

B tng ti c vn chuyn t my trn ti hin trng bng xe chuyn dng, sau c trn b mt kt cu chun b trc v cng nhn s dng m m. Khng c b tng vi chiu cao ri t do qu 1.5m.

+ Khi b tng tng chn ch b tr cc ng thot nc theo ng thit k. V c th phn t b tng theo chiu cao hoc chiu di ca tng on tng chn.

+ Bo dng: Khng ch m v nhit cn thit nh ti nc trong nhng ngy hanh kh hay che y v ph bt trong nhng ngy ma gi. Ch khi b tng t cng theo quy nh mi c tho vn khun.

- p t sau tng chn v gia c mi taluy:

+ Vic p t c thc hin bng t tt c thnh phn ht thch hp, sc chu ti tt c s ng ca k s t vn.

+ Khi p t tin hnh p tng lp mt, mi lp t sau khi m cht bng m cc t 15 - 20 cm.

+ p cc lp tip theo cho n khi cao theo bn v thi cng. Vic p cc lp tip theo, nh thu s cn c iu kin thc t cng trng b tr thi cng bng th cng hay kt hp gia th cng v c gii.

+ Sau khi hon thnh cng tc p t tng chn, tin hnh nh v xc nh chnh xc kch thc hnh hc phn gia c mi taluy. Sau gt khun, bt mi taluy. Cng tc gia c c tin hnh sau khi cng tc gt khun, bt mi c chp thun.2.2.2. Cc ni dung chnh trong thi cng r :2.2.2.1. Cng tc chun b :

Chun b r thp : R thp c ch to sn ti nh my theo kch thc thit k , buc thnh tng kin theo tng loi tm buc sn vi khung nh hnh . R thp s c ghp buc ti cng trng .

Cc l r thp khi s dng u c xut trnh phiu xut kho v kim nh cht lng sn xut ca c s sn xut.Cc tm li c buc cht thnh kin vn chuyn n cng trng mi lp rp.

R thp gm c 3 b phn c lm ring r : Tm y, cc tm bn v tm np .Mi tm c khung thp nh hnh , li thp an hnh mt co su cnh theo kch thc thit k . Cc u dy li thp c qun cht vo khung thp nh hnh t nht 3 vng khng b tut

Ct thp lm r ng chng loi thit k , l loi thp m km , m bo ng knh , lp m bn cht , khng b bong rp , try xc qu gii hn quy nh ,m bo cng chu ko ca dy thp theo BS 1052:1980.Dy buc v khung thp nh hnh cng phi c m km

Cc r thp m bo cht lng v kch thc theo yu cu thit k, trc khi a vo thi cng u c K s gim st kim tra chp thun .

Chun b dng c : Dng c thi cng r thp bao gm : X beng g p r khi cn y v buc , km mi di , mc kho , cc dng c khc nh : gi khun , cc thp neo , dy thp buc , thanh vng , tng ...2.2.2.2 Ghp buc r thp : Cc tm li thp c sa cha cho t cc yu cu thit k . Tri phng tm li thp trn mt t phng s b nn thng bng chn, sau nn bng tay li thp tht vung gc, cc cnh song song , khng cn np nhn np gp. Sau khi nn thng cc tm li nh thu ghp cc tm li vi nhau theo thit k . ch kh ro th cng vic ny s c thc hin ngay ti v tr s t r khng phi di chuyn lm bin dng r thp .Cc mp cnh ca tm li thp c lin kt vi nhau cht ch bng dy thp buc .Cc mi ni buc l qun n v qun kp phn chia u trn cc cnh ca r thp . Cc dy buc thng kt thc gc r thp bng mi qun ba cho chc chn , u dy buc phi b gp vo trong r , thng thng cc vng qun cch nhau 10 cm .

m bo cht lng cng trnh cn phi m bo cc iu kin sau :

Tt c cc tm li thp cn c ch to trong nh my . Nhng tm ny c tnh ton y cc d phng khi lp ghp li th c 1 r thp ng nh kch thc thit k .

Khi ghp buc phi m bo ccc tm li thp cng v phng , cc tm thnh b thng ng , cc gc r ng yu cu ca thit k , cc nt buc lin kt ng k thut .

2.2.2.3.B tr r thp :

Sau khi c ch to , nh thu ghp r thp vo ng v tr thit k . Trc khi vo r phi lm cc cng vic sau :

-Buc lin kt cc r vi nhau ( Vi tt c cc r chung quanh v r di ), nguyn tc lin kt l cnh ( Thp khung nh hnh ) gip cnh .K thut buc ging nh buc ghp r , dy buc phi lin tc .

-Ko cng r thp trc v trong qu trnh nhm lm cho r c phng p , khng b phnh , b ln x xung v khng b mo .

-Dng c cng l ti cp ,cc cc g hoc bng thp . Sau khi y r cc cc ny c th thu hi hoc li nhng ch cn thit . Cng vic cng r thp do mt nhm chuyn trch thc hin .

2.2.2.4. Xp vo r :

Yu cu v :

dng xp vo r l c khai thc ti m . phi cng chc , khng b bin cht trong iu kin thi tit bin i , b ngp nc , c dung trng cao. Cc vin ni chung l loi ng u, c kch thc trong phm vi 100 - 250mm v phi ln hn 1,2 n 2 ln kch thc ca mt li thp khng lt qua , cc vin nh c vo gia r .

xp vo r phi c ln cht bng x beng sao cho rng gia cc vin nh nht v sau ny cng trnh t b ln v bin dng .

Sau khi xp y r khng b tung mi buc , khng b phnh , gi c hnh dng v kch thc ban u .

Trnh t thi cng :

Cng tc xp vo r c thc hin bng th cng. Trnh t l xp mt lp kn y trc , sau xp cao dn ln n y r. Lp u tin phi xp nh nhng khng lm hng lp bo v thp y r. Tin hnh xp y tng r ri chuyn sang r k tip .

Lp trn cng c xp cao hn r thp khong 3-5 cm d tr ln ca trong r .

Ko p r thp :

Trong qu trnh xp vo r vic ko p hai mt bn i xng l bin php chnh r khng b bin dang, b phnh so vi hnh dng thit k . Dy ko l dy buc r thp mt si hoc chp i xon vng qua hai li thnh hnh s 8 gia c cht xon lm cng dy ko . Cn ch u s 8 dy phi vng qua hai mt li . i vi loi r ca cng trnh ny ta b tr 1 dy ko ti v tr cch y r 25 cm.

2.2.2.5. y buc np r :

Sau khi vo y r ( Cao hn r 3-5 cm ) nh thu tin hnh san phng ri y v buc np , cn gi cho np r khng b cng qu v y kn r . Dy buc np cng l dy s dng buc r . Nt cui cng phi gc v qun 3 vng3. Thi cng nn ng :

3.1. Ln ga, cm cc, chuyn gi du mc cao :

Sau khi nhn mt bng thi cng, tim mc nh v cng trnh ca CT bn giao, nh thu tin hnh du cc cc tim v mc cao ra ngoi phm vi tuyn trong qu trnh thi cng khng b mt, cng tc ny c tin hnh bng my kinh v v thy chun, cc cc gi c nh du v c s cc sau khi gi.

Khi cng tc chuyn du cc xong, nh thu tin hnh xc nh phm vi thi cng nn ng lm cng tc pht quang.

3.2. Thi cng nn ng o :

Vi a cht l t:

Cng tc thi cng o nn ng ch yu l o m rng, c thc hin bng my l ch o, kt hp vi th cng. Ti cc v tr o, vi chiu cao o khng ln vic o m rng c thc hin bng my i, my o kt hp t vn chuyn. t sau khi o c vn chuyn ti v tr theo quy nh. Vi a cht l : Dng phng php kt hp gia my o v n ph (n ph theo phng php l nh), n ph tng lp trn sut chiu rng mt ng. Trnh t cc bc thi cng nh sau:

To l: -Dng my khoan hi p, ng knh 42 to l su t h = 1.5 - 2m. B tr l theo hnh hoa mai. Hai hng l hai bn taluy b tr sao cho phu n d kin st vo mp v thnh ta luy v lng thuc n t khng s hin tng phm ta luy.

- C ly gia cc l np thuc: a= b(0,8 - 1,2) w.Np thuc n:

- Sau khi kim tra l thy t yu cu thit k th tin hnh np thuc n vo l.

- Np tng thi mt sau dng que y cc thi tht st vo nhau. Thi gy n np sau cng. Khi np thuc c kp khng c n cht v trnh va chm phng n bt ng. Ch trong qu trnh np lng thuc n vo l ti a 80% v ti thiu khng t hn 20% th tch l khoan.

Lp l: Sau khi np thuc vo l khoan tin hnh lp l. Vt liu n phi chun b trc cng tc lp l c nhanh chng( lu qu thuc n trong l c th b m). Vt liu lp l phi kn.

- Khi lp b t xung n u dng que g nhi cht nh nhng n . Trnh que g chm vo dy in gy tt kp.

Gy n: Bng in. Trc khi n phi c tn hiu bo mi c gy n.

Vn chuyn t: Dng my o dn t, . Trc khi dn dp t phi tin hnh kim tra li nhng l mn cha n, nu c phi kch n.

C nh vy cho n tng lp, ht lp ny n lp khc cho n khi t cao thit k th dng v lm cng tc hon thin.

3.3.Thi cng nn ng p :

a. Vt liu p:t p nn c san t phn o,vn chuyn bng t t n v tr. Trc khi p chng ti tin hnh thc hin cc th nghim xc nh:

- Thnh phn ht.

- Dung trng kh ln nht.

- m tt nht.

- Ch s do.

- Gii hn chy...

Cc bo co kt qu th nghim ny s c trnh cho ch u t v TVTK, ng thi lm c s cho vic kim tra v thi cng sau ny.

b. Bin php thi cng:

- t p c san thnh tng lp bng nhn lc, my san. Mi lp san ( 20cm. Khng ch m v tin hnh m nn bng m cc nhng v tr m rng < 1m, i vi nhng v tr p m rng > 2m th dng lu bnh thp 8 - 12T m cho t cht K95 mi thi cng lp tip theo. Lng t p c tnh ton cho tng lp p vi h s ln p = 1,3

- Lp p u tin l lp c v tr thp nht trong on p. Mt phng cc lp p song song vi phng ca mt ng. Qu trnh p thc hin ln lt tng lp t di ln trn.

- Lp p trn cng c cao bng vi cao ca khun ng.

-Thc hin cng tc m ln: t chuyn ti c san thnh tng lp c chiu dy ng u h = 20cm trn sut phm vi m rng ca nn ng. Thc hin cc bin php khng ch m m bo chng c m t 0.8 -1.2 m tt nht; sau tin hnh lu ln. Qu trnh lu ln c hin nh sau :

- Dng lao ng ph thng kt hp vi my san t hnh san phng v to dc ngang trnh b ng nc nn trong qu trnh thi cng gp ma.

- Dng m cc m n cht K95 ti nhng v tr m rng nn ng < 1m.

- Dng lu bnh thp loi 8 tn lu t 3- 4 lt/ im.

- Dng lu bnh lp, lu rung m cho n khi t cht yu cu (8 - 10 ln/1 im).

- Khi t cht, vi lp trn cng dng lu bnh thp lu 2 -3 lt /im hon thin.Thit b m ln bao gm :

-My i 130CV ( lu s 1 ), vn tc lu V = 1.0-1.5 Km/h-m bnh thp 10-12 T ( lu s 2 ), vn tc lu V = 1.5-2.0 Km/h

-Lu rung ( lu s 3 ), vn tc lu V = 2.0-3.0 Km/h

c. Cng tc qun l k thut:

m bo cht lng trong qu trnh thi cng chng ti thc hin cc bin php sau:

- T chc thi cng hp l, cc lp p c thc hin gn trong ngy.

- t c vn chuyn ht n ni p; san m ngay. Trong trng hp thi tit su hay c ma th trc t nht m c 1/2 cng lu yu cu, lun ch ti cng tc san phng to dc ngang thot nc tt.

- S dng t p m bo ng yu cu cht lng.

- Thng xuyn kim tra m ca t trong thi cng, khng ch m trong gii hn t 0.8 -1.2 m tt nht.

- S dng cc thit b m ln ng yu cu theo cc iu kin c th, v theo ng s , cng m nh m ln th im trong thi cng thng nht vi k s t vn gim st v cht lng vt liu, chng loi my m v s ln m trc khi thi cng i tr.

- Thng xuyn b tr mt t th nghim ti hin trng kim tra m, cht ca nn t p c bin php s l k thut kp thi.

- Trong qu trnh p kt hp bt, v mi ta luy theo ng thit k v c o su hoc p cao c 1m li kim tra li dc mi ta luy mt ln. Tin hnh p p 30cm sau dng my xc gt v p.

- Thng xuyn kim tra cao , kch thc hnh hc ca cc lp p c bin php s l ngay khi khng t yu cu.

- Cc sai s kim tra sau thi cng nh cao , kch thc, cht m bo trong phm vi sai s cho php.

d. Tin thi cng nn ng:

(Tin c th hin trn bn v tin thi cng )

4. Thi cng ng BTXM v gia c l :

4.1. Thi cng mng cp phi dm loi II :4.1.1.Yu cu v vt liu:

Cp phi dm: L ton b ct liu ca loi ny (k c c ht nh v ht mn ) u l sn phm nghin t sch , mc b bm t bn khng ng k , khng ln phong ho v khng ln hu c .

Cp phi dm c s dng lm lp mng ca kt cu o ng .

Cp phi dm c trn m vt liu.

Cp phi dm em dng khng ln rc ri, c, r cy, cc cht mn r cy khc.

Vt liu em dng s m bo cc ch tiu sau:

Kch c l sng (mm)T l % lt sng

Dmax= 50mmDmax= 37.5mmDmax= 25 mm

50100

37.570100100

25508572100100

12.5306538695085

4.75225026553565

2.0154019432550

0.4258209241530

0.07528210515

+ Ch tiu Los-angeles (L.A): i vi loi mt cp cao A1 th cp phi dm loi I : LA 35, loi II 40+ Ch tiu Atterberg: Gii hn chy ca cp phi dm loi I khng th nghim c, loi II khng ln hn 25, ch s do Wn 6.

+ Hm lng st (ch tiu ES): Theo quy nh cp phi dm loi I c ch tiu ES > 35, cp phi dm loi II c ch tiu ES > 30.

+ Hm lng ht dt: khng qu 10% v 15%.

- Trc khi mua a vo s dng cho cng trnh phi tin hnh th nghim kim tra cc ch tiu ca . Cc ch tiu ny nu ph hp vi cc tiu chun sau y v c s ng ca KSTVGS mi vn chuyn ti cng trng.

+ Cng khng p ( 800daN/ cm2.

+ hao mn DEVAL < 6%

+ Ch tiu lng ht dt, ht qu c, ht di c. Theo qui nh di y:

* Lng ht c kch c > D cng nh lng ht c kch nh hn d khng c qu 10% ( tnh theo khi lng).

* Lng ht to qu c D+ 30mm khng c qu 3% ( tnh theo khi lng).

* Lng ht < 0.63d khng c qu 3% ( tnh theo khi lng).

* Lng ht dt khng c qu 15% (tnh theo khi lng). Ht dt l ht m chiu di + chiu rng vt qu 6 ln chiu dy.

* phi c sch, kh, khng ln tp cht, c rc v lng ht bi st khng qu 2% khi lng, lng ht st di dng vn hn khng ln hn 0.25% tnh theo khi lng.

+ sch, dnh bm vi nha ng t cp 3 n cp 5 theo phng php ALxikhina.

- Khi cc iu kin v thnh phn, kch c ht khng m bo chng ti s t chc gia cng li trc khi chuyn ti cng trng.

- Tt c cc bo co ca cc th nghim ny s c trnh cho ch u t v ch khi c s ng mi tin hnh tp kt v hin trng thi cng.

4.1.2. Thi cng:

4.1.2.1. Chun b:

Ly mu cp phi dm th nghim kim tra cht lng so vi yu cu v tin hnh th nghim m nn tiu chun xc nh dung trng kh ln nht Ymax v m tt Wo ca cp phi dm

4.1.2.2. Xc nh h s ri:

K ri =

Trong :

- YC max Dung trng kh ln nht ca cp phi dm theo th nghim m nn tiu chun.

- K cht c qui nh bng hoc ln hn 0,98.

- YC tn: Dung trng kh ca CPD lc cha lu ln.

- Kri: tm ly bng 1,3 v c xc nh chnh xc thng qua ri th.

4.1.2.3. Chun b cc thit b phc v kim tra trong qu trnh thi cng:

+ Xc xc khng ch b dy v thc mui luyn.

+ B sng v cn phn tch thnh phn ht.

+ B th nghim ng lng ct.

+ Trang b xc nh m ca CPD.

+ B th nghim rt ct kim tra cht.

4.1.2.4. Chun b cc thit b thi cng:

- t t vn chuyn CPD

- Xe tc phun ti nc trong qu trnh thi cng.

- My san san cp phi.

- My lu: Lu bnh st 6T - 8T ; Lu bnh st 10T - 12T; Lu rung.

- Nn ng c cc bn nghim thu cho thi cng mng.

4.1.2.5. Cng ngh thi cng:

- Trc khi thi cng ta tin hnh ri th nghim 500 - 600 m2 xc nh c h s lu ln v cc thit b lu ph hp ng vi m tt nht. Sau mi tin hnh ri i tr.

- Vn chuyn CPD

+ Vn chuyn CPD bng t t ti hin trng thnh tng ng nh gn nhau.

- Ri CPD

+ Dng my san san, m CPD khi san phi nm trong phm vi m ti u(Wo 2%), nu CPD cha m th va san va ti thm nc.

Chiu dy l lp CPD l 15cm ( sau khi ln cht).

+ Trong qu trnh san CPD, nu pht hin thy hin tng phn tng th xc i thay bng CPD mi.

- Lu ln:

+ Trc khi lu nu m CPD cha t m tt nht th dng xe tec ti thm nc.

- Trnh t lu:

+ Lu s b bng lu bnh st 10-12 tn khong 3 - 4 ln/im.

+ Dng lu rung 25 tn lu 8 - 10 ln / im.

+ Lu bnh lp lu 20 - 25ln/im.

+ Lu l phmg li bng lu bnh st 8 - 10 tn.

Trong qu trnh lu, lun ti m nh b li lng nc b bc hi.

- Yu cu cht K ( 0,98.

+ Bo dng; Thng xuyn ti nc gi m cho mng CPD, hn ch ti a xe c qua li.

4.1.2.6. Kim tra trong qu trnh thi cng:

- C 200m3 hoc 1ca thi cng kim tra thnh phn ht, v t l ht dt, v ch s do.

- Ly mu CPD trn thng xe khi xe ch CPD n hin trng.

- Khi thay i m hoc loi sn xut CPD phi kim tra li tt c cc ch tiu ca CPD ng thi tin hnh th nghim m nn.

- C 200 m3 CPD hoc 1 ca thi cng kim tra m trc khi ri.

- Kim tra cht theo phng php un ct theo qui trnh 22TCN 13-79.

4.1.2.7. Kim tra nghim thu:

- Kim tra cht: C 7000 m2 kim tra 2 im ngu nhin theo phng php rt ct. K phi ln hn hoc bng h s thit k.

- Kim tra b dy kt cu: Kt hp vi vic o h kim tra cht tin hnh kim tra chiu dy lp CPD, sai s cho php 10 mm.

* Cc kch thc khc v bng phng: C 100 m di kim tra mt mt ct.

+ B rng, sai s cho php so vi thit k: - 50 mm.

+ dc ngang, sai s cho php : ( 0.5%.

+ Cao cho php sai s 10 mm

4.3. Thi cng mt ng BTXM :

4.3.1. Trnh t thi cng tng qut:

- Dn dp mt bng.

- Thc hin cc cng tc chn b: vn khun, ct thp.

- Sa cha v san gt to phng nn ng.

- Xy dng mng mt ng.

- Lp dng vn khun, thp truyn lc.

- Ri giy du.

- b tng.

- Dng h mt ng BTXM.

- X khe khi b tng t > 80% cng .

- Rt mastic chn khe.

- Cc cng tc hon thin khc.

4.3.2. Trnh t thi cng chi tit:

4.3.2.1. Ct liu dng cho cng tc b tng:

Tt c cc loi ct liu dng b tng c nh thu chn cc loi c cc ch tiu k thut t tiu chun vt liu dng trong cng tc b tng.

-Xi mng : s dng b tng l xi mng Poclng TCVN 2682-1992, mc xi mng l loi PC-40. Xi mng nhp v c ngun gc r rng v thi gian t khi xut xng n khi s dng khng qu 3 thng, vic bo qun xi mng c tun th theo ng quy nh ca tiu chun TCVN 2682-1992.

-Ct vng : dng cho cng tc b tng tho mn cc yu cu ca tiu chun TCVN 1770-86. Bi cha ct lun gi kh ro v c bin php chn tri khi c ma.

- dm 1 x 2 : dng trong cng tc b tng l loi c nghin t thin nhin v c cc tiu chun cht lng m bo theo quy nh ca tiu chun TCVN 1771-86. Kch thc ca cc ht ln nht khng ln hn 1/2 khong cch thng thy nh nht gia cc thanh ct thp v 1/3 chiu dy nh nht ca kt cu c b tng.

-Nc : dng trn b tng v bo dng b tng m bo cc yu cu ca tiu chun TCVN 4506-87. Cc ngun nc c th dng trn b tng v bo dng b tng khng ln tp cht bn hoc ln du m.

4.3.2.2. Cng tc vn khun:

- Vn khun m nh thu s dng c lm bng thp v c t tng di, t ng v tr thit k: mt nh vn khun bng cao thit k ca mt ng. V tr ca vn khun trn mt bng c xc nh bng my kinh v, cao c xc nh bng my cao c thu bnh.

- Sau khi t vn khun chnh xc ng v tr v cao thit k th phi chn kn khe h gia y vn khun v mt ng hin hu, bo m vn khun khng b x dch khi thi cng v khng b chy nc xi mng.

- Trc khi b tng phi dng du nhn qut thnh vn khun chng dnh v dng nha bitum qut cc mp tm b tng thay th vn khun.

- Khi thi cng cc di xen gia th dng m ca cc tm b tng thi cng trc thay cho vn khun. Thi gian cho php b tng ca di xen gia l thi gian m tm bn cnh cng cho php xe my thi cng i li trn .

- Vn khun t xong phi c nghim thu theo cc ch tiu sau:

+ Sai s cho php ca nh vn khun so vi cao thit k ca tm b tng: ( 3 mm+ Sai s ca v tr vn khun trn mt bng : ( 5 mm

+ Vn khun phi thng ng, sai s khng qu 100+ Vn khun phi vng cht, khng x dch v tr khi thit b thi cng lm vic.

4.3.2.3. Cng tc ri giy du:

Sau khi lp dng vn khun v thp truyn lc xong

Kim tra li cao ng v b tr ct thp so vi bn v. Qu trnh thi cng tip theo sau khi c gim st nh thu chp nhn.

Cng tc ri giy du bao gm ;

-Chun b cc trang thit b v dng c thi cng cn thit

-Pht nha ng ln giy du theo yu cu thit k

-Thi cng ri u 1 lp giy du ln mt ng cp phi dm loi II dy 15 cm

-Kim tra li v tin hnh cng tc tip theo.

4.3.2.4. Trn b tng :

Trc khi trn b tng nh thu tin hnh thit k cp phi b tng v th nghim mu th, cng tc ny nh thu thu c quan c t cch php nhn thc hin di s gim st ca ch u t, t vn gim st. Khi thit k cp phi b tng nh thu dng cc loi vt liu s dng ti hin trng thi cng sau ny.

Cc loi vt liu trn b tng nh ct vng, dm, xi mng u c cn ong o m ng nh lng theo cp phi ca mc b tng yu cu.Ton b vic cn o ct liu v xi mng theo thnh phn cp phi mc b tng ng thit k s c cc thit b in t ca trm trn thc hin. st ca b tng c kim tra ngay khi trn m b tng u tin, v iu kin thi tit trong khi trn b tng n nh th st c kim tra mt ln trong ca lm vic.

Cc mu kim tra cng b tng c ly ti ni b tng v c bo dng m theo TCVN 3105 1993. Cc mu th nghim ny c ly theo tng t mu, mi t mu gm 3 mu c ly mu cng mt lc mt ch theo TCVN 3105 1993, kch thc vin mu 15x15x15 cm. i vi cc cu kin c sn ca cng trnh ny ly 2 t mu cho ton b .

4.3.2.5. Cng tc b tng : -B tng c chuyn n xe ti chuyn dng qua mt phu thu v vn chuyn n v tr cn .

-B tng c ri chng thnh lp khng b phn tng v c dung trng ng u trn ton b din tch ca tm khi cha lu ln. v tr khe ni c t thanh truyn lc phi v san u b tng ra c 2 bn, trnh lm x dch v tr thanh truyn lc. Ri b tng n u phi m ngay n . Dng m di ( Tn sut chn ng > 3500ln/ pht) m ton b tm b tng. m di th xin ti mt su nht nh, trnh lm hng lp ngn cch. Thi gian m mi im khng qu 45 giy, sau nng m ln t t, trnh to thnh l v chuyn sang v tr mi cch v tr trc 1,5 bn knh tc dng ca m. Dng m bn ( tn sut chn ng > 3500 ln/ pht) m mp ngoi vo gia. Thi gian m ti mt ch khong t 45 - 60 giy. Hai v tr vt m sau v trc phi trm ln nhau khong 10 cm. Trong khi m nu pht hin c ch cao hoc thp th phi sa cha ngay

-Sau khi cng tc m kt thc phi tin hnh ngay vic hon tin b mt tm b tng

ln to phng mt ng theo yu cu k thut.- m n u phi gt phng n y, s va tha phi gt li nhiu ln cho n khi hon ton t yu cu v bng phng mi thi.Cc tiu chun nghim thu ng b tng xi mng:Hng mc kim traTiu chun cht lng v sai s cho phpS ln kim traPhng php kim tra

Cng ko unKhng nh hn cng quy nh ca thit kTheo iu 7,5,2 mi ngy c 2 mu1- Mu m ( 15 x 15 x 60) cm

2 Khao mu hnh tr ti hin trng so snh

thng ca khe dc10 mm100m di khe o 1 lnCng dy di 20 m o lch ln nht

thng ca khe ngang10 mC 20 khe co o 2 kheCng dy theo chiu rng tm, o lch ln nht

thng ng ca mp tm( 5mm vi khe dn khng c sai s100m o 2 chTh qu di thng ng theo mp tm v o ch lch nhiu nht

bng phng3 mmC 50 m di o theo hng ngang 3 chMi ch dng thc 3 m o lin 3 ln, ly tr s khe h trung bnh ln nht.

Chnh lch cao ca cc tm k nhau2mmMi khe dn o 2 ch, ch 20 kh ngang ly 2 khe o 2 cho bng thc thp

Cao tim ng( 5mm20 m o 1 imo bng my cao c

dc ngang( 0,15 %C 100m di o mt mt ct, mi mt ct o 7 im bng my cao c

Chiu dy tm( 5 mm100m o 2 chDng thc hoc khoan l hin trng

B rng tm1/2000100m o 2 chDng thc o ton chiu rng

Chiu di tm( 10 mm100m o 2 chDng thc o khong cch 2 khe co

su rnh to nhm tn mt tm2mm ( 0,25100m o 2 chTh nghim theo phng php rc ct

Khi nghim thu cc cu kin b tng phi c ch u t, t vn gim st ng nghim thu bng vn bn.4.3.2.6. Bo dng b tng :

B tng sau khi xong c bo dng trong iu kin c m v nhit cn thit ng rn, ngn nga cc nh hng c hi trong qu trnh ng cng ca b tng. i vi cng trnh ny nh thu chn phng php bo dng m. Phng php bo dng m mt ng b tng xi mng bng ct m v ti m thng xuyn.

Bo dng m l qu trnh gi cho b tng c m cn thit ninh kt v ng cng sau khi b tng, y dng phng php ti nc gi m cho b tng. Quy trnh bo dng m thc hin theo TCVN 5592 - 1991.

- Trong thi gian bo dng, kt cu b tng c bo v chng cc tc ng c hc nh rung ng, lc xung kch, ti trng v cc tc ng c kh nng gy h hi khc.4.3.2.7. Lm khe:

Theo yu cu k thut ng B tng xi mng, thi cng khe bao gm :

- Khe dc : Dc theo tim tuyn , c thanh truyn lc bng thp g D12 cch khong 70cm. Mp trn khe x rng 0.8 - 1.2 cm, su 6 cm trm bng mastic.- Khe co : B tr cch khong 6m theo phng dc tuyn ( tr v tr khe dn ), cu to khe c thanh truyn lc bng thp trn D25 cch khong 65cm. Mp trn khe x rng 0.8 - 1.2 cm, su 6cm trm kn bng mastic.- Khe dn : B tr cch khong 40-50m theo phng dc tuyn, cu to khe c thanh truyn lc bng thp trn D25 cch khong 30cm, mt u b tr ng nha nht mn ca trn nha ng. Mp trn khe x rng 2.5cm, su 4cm trm kn bng mastic, phn di khe chn tm m bng cao su.4.3.2.8. Tho vn khun:

Vn khun ch c d b khi b tng sau khi t nht l 12h. Khi tho vn khun phi cn thn trnh h hi ti mt ng. Sau khi vn khun c d b xong cc mp cnh ca tm phi c bo dng ngay ging nh i vi b mt ca ng.4.3.2.9. Rt mastic chn khe:Sau khi kt thc thi k bo dng nh thu tin hnh v sinh khe bng cc phng php : Dng nc cao p xi sch tp cht, bn bn bm vo thnh khe trc khi chn mastic. Vic chn mastic c tin hnh lin tc trn ton chiu di ca khe, khng c t qung. Vic chn khe u phi c tin hnh trong thi gian kh ro.

4.3.2.10. Kim tra cht lng b tng:

Trong qu trnh thi cng, n v s tin hnh ly mu th nghim kim tra nhng ch tiu sau:

Lm th nghim thnh phn cp phi vt liu, cp phi ht t c cng b tng thit k.

Khi trn b tng ly mu th nghim xc nh cng b tng theo tng t, mi t gm 3 vin mu, c ly cng mt lc v cng mt ch theo quy nh. Vi b tng mng c 100 m3 ly mt t mu. Vi b tng kt cu mng c 20 m3 b tng ly mt t mu.

Thng xuyn kim tra st xc nh v khng ch lng nc v xi mng.CHNG vii :

BIN PHP QUN L M BO CHT LNG CNG TRNH

1. H s thi cng

-Thc hin theo quy nh qun l cht lng cng trnh xy dng theo Ngh nh s 209/2004/ND-CP ngy 16/12/2004 v N 49/2008 ngy 18/4/2008 ca Chnh ph v qun l cht lng cng trnh xy dng v Thng t s 12/2005/TT-BXD ngy 15/7/2005 ca B Xy dng hng dn mt s ni dung v qun l cht lng cng trnh xy dng v iu kin nng lc ca t chc c nhn trong hot ng xy dng. V tun th theo n thit k v cc vn bn quy nh hin hnh khc.

- Cht lng cng trnh l mt trong yu t quyt nh s thnh bi v s sng cn ca Cng ty. Chnh v vy, vn ny c c bit quan tm i vi cc cng trnh do Nh thu chng ti m nhim thi cng. Cht lng cng trnh c hnh thnh trong mi giai on: Trc khi thi cng (lp k hoch, tin , thit k ch to vt liu, ..... v vn chuyn chng ti hin trng), giai on xy dng (qu trnh thi cng lp t), v sau xy dng (nghim thu v bn giao a vo s dng).

- H thng qun l bao gm: Kim tra ti liu v cc thng s k thut thit k, cc ch tiu k thut ca vt liu c s dng v a vo cng trnh, kim tra nh k cht lng cng tc xy lp, thanh tra k thut, an ton lao ng. Qu trnh kim tra c s tham gia ca bn thn cng nhn lao ng, k thut hin trng, ch nhim cng trnh, cn b gim st cht lng ca cng ty, gim st k thut ca k s t vn nhm ngn nga v loi tr h hng, ph phm v s c i vi cng trnh trong mi thi tit mi giai on..

Ngay t khi khi cng Nh thu s lp ngay h thng s sch h s cn thit cho vic theo di thi cng qun l cht lng.

- Nht k thi cng: Ghi chp tt c cc hot ng, din bin pht sinh lin quan n thi cng tng ngy, tng hng mc.

- Nht k thi cng: Ghi li tt c cc kin xut ca thi cng, kin trao i khuyn co, kin gii quyt ca Lnh o, cn b c thm quyn ca cc bn A-B-Thit k, t vn gim st.

- S bin bn nghim thu cng vic, hng mc cng trnh hon thnh trong tng giai on.

- S theo di kt qu th ti hin trng.

- S qun l k thut: Ghi to , cao gc lm c s nghim thu k thut cng trnh.

- Qun l cc bn v thi cng, cc ti liu vn bn lin quan.

- Lp bn v hon cng, h s hon cng theo TT 12/2005/TT-BXD ngy 15/7/2005 v TT 02/2006/TT-BXD ngy 17/5/2006 v N 209/2004/N-CP ngy 16/12/2004.

2. Bin php qun l v h gi thnh sn phm

2.1. Qun l gi thnh sn phm-Nh thu da trn c s n thit k c duyt, ng, khi lng cng vic, kch thc hnh hc cng trnh nh trong hp ng.

- Nhng thay i v khi lng: Nh thu phi bo co BQL bit, cng BQL, t vn thit k, t vn gim st xc nhn lp t trnh ln cp c thm quyn gii quyt.

Nh thu s c nhng d bo v thng bo sm cho Ch u t bit nhng thay i v khi lng v thi gian thi cng.

-Nh thu s thng bo cho Ch u t bit d bo cp nht thu chi ti v hon thnh tr i gi tr tm ng hoc thanh ton.

-Cui cng lm tng th nghim thu thanh ton theo cc iu khon k kt trong hp ng.

2.2.Bin php h gi thnh sn phm:

-Trong khi nn kinh t th trng c s cnh tranh gay gt, thng thu th gi b thu phi hp l sc cnh tranh. Nh vy phi c bin php g va m bo cng trnh lm ra c cht lng to c uy tn, va phi c li pht trin sn xut nhng gi thnh phi hp l. Nu ch ch trng khu b gi ca sn phm thp m khng nng cao cc bin php t chc thi cng, th cht lng cng trnh s khng m bo. Tiu ch nh gi nng lc nh thu da trn rt nhiu yu t xong nhng yu t quyt nh l bin php t chc thi cng v qun l thi cng. Nh thu ly con ngi lm yu t then cht, qua s n lc nghin cu, sng to a ra quy trnh v cng ngh thi cng ph hp nht lm tng cht lng v gim gi thnh sn phm.

Sau y l mt s bin php nhm h gi thnh cng trnh m khng nh hng n cht lng cng trnh:

- Cng ty c nhiu nm trong thi cng cc cng trnh giao thng, thu li, i ng cn b k thut v cng nhn c nhiu kinh nghim trong vic vic t chc thi cng. ra cc bin php thi cng hp l nht gp phn y nhanh tin , tng cht lng v gim gi thnh cng trnh.

- Vic p dng trit my mc thit b thi cng thay v phng n th cng trong mt s bin php n v TVTK lp tham kho s tng nng sut, gim thi gian thi cng, nh vy cng s gim c gi thnh thi cng.

- Vic s dng lc lng nhn cng lao ng trong nhng cng vic c th di s ch o ca cn b k thut ca Cng ty cng gp phn gim gi thnh cng trnh.

- L mt trong nhng Cng ty c nhng i tc lu nm v uy tn trong cc lnh vc, c bit l thi cng cc cng trnh xy dng ni chung v giao thng ni ring. Xem xt v b sung ngay cc phng n d phng my mc, thit b tiu chun a vo thi cng kin quyt khng thi gian thi cng b gin on. Qua m bo tin v gi thnh cng trnh.

Vi quy m v chc nng quan trng ca cng trnh, nhanh chng a cng trnh vo phc v cho nhn dn trong vng. n v thi cng chng ti s huy ng mi ngun vn tp trung vo xy dng cng trnh theo ng tin , yu cu k thut.

CHNG VIiI:

CNG TC AN TON LAO NG V PHNG CHNG CHY N

1. Cng tc an ton lao ng :1.1. Cng tc an ton i vi cng nhn:

- Cng trng phi c cn b chuyn mn v cng tc an ton lao ng v phng chy cha chy.

- Cng trng phi son tho ni qui an ton lao ng, t chc cho cn b cng nhn thi cng hc tp.

- Trang b y cho cng nhn nhng dng c bo h thu theo tnh cht cng vic lao ng ca h nh giy, m bo him, gng tay, qun o bo h, knh hn, khu trang...

- Lp bin php an ton cho tng hng mc cng vic, tng loi ngnh ngh, t chc tp hun an ton cho cn b cng nhn thi cng trn cng trng, nht l i vi cng nhn vn hnh my v cng nhn lm vic trn cao.

1.2. Cng tc an ton cho cng trnh:

- T chc mt bng thi cng thnh tng khu vc chuyn bit nh: cng trnh, ng vn chuyn, bi gia cng, kho tng ln tra, khu vc tp kt my mc thit b, vn phng cng trnh, nh ngh ca cng nhn, cng ra vo ... Cc hng mc ny c b tr mt cch khoa hc, thun tin nht cho vic thi cng, trnh c nhng tai nn ri ro trong thi cng.

- Cc khu vc t my mc chuyn dng nh cn cu, my hn my trn b tng phi c bng treo cnh bo, qui nh cho mi ngi trong cng trng bit v chp hnh.

- c bit ch phng chng bo l cho cng trnh trong qu trnh thi cng, thng xuyn c cc loi bt che ph cho cng trnh bo dng phng trnh nng cho cc b phn kt cu mi b tng.

1.3. Cng tc an ton khi vn hnh s dng cc loi my mc thit b:

- Tt c cn b cng nhn vn hnh trn cng trng u phi l nhng cng nhn c tay ngh cao v loi my mc mnh vn hnh, c qua lp tp hun v an ton lao ng khi vn hnh my.

- Tt c cc loi my mc thit b trn cng trng phi thng xuyn kim tra bo dng nh k, sa cha hng hc kp thi, m bo khi vn hnh khng xy ra s c.

- Cc loi my mc chuyn ngnh nh my vn thng, ti in, cn cu phi c bng treo cnh bo cm mi ngi qua li khi cc thit b trn ang hot ng.

- i vi cc loi my nh my in, my dp, my tin... phi c hp che chn an ton nhng b phn chuyn ng.

- Cc phng tin vn chuyn nh t, xe ko... khi vn chuyn vt liu phc v thi cng phi chy trn nhng lung ng c qui nh c th, khi vn chuyn hng ri nh ct xi mng, gch ... phi c vi bt che ph k trnh ri vi dc ng.

- c bit phi thng xuyn t chc kim tra cht lng v tnh trng hot ng ca my mc, thng xuyn bo dng tiu tu, bo tr my mc pht hin kp thi nhng h hng, vng mc...

1.4. An ton giao thng :Xy dng h thng an ton giao thng trn tuyn nh: bin bo cng trng, bin bo hn ch tc , bin bo n mn, bin bo ng hp, bin ch dn, ... y v ng tiu chun, r rng, t ng ni theo quy nh ca B GTVT trong iu l bin bo hiu ng b.

B tr 2 cng nhn 2 u on thi cng hng dn giao thng, ng thi b tr 1 my i DZ171, mt my o tc trc 24/24 gi ch x l khi xy ra s c tc ng.

Thi cng on no dt im on khng nh hng n giao thng.

2. Cng tc phng chng chy n :2.1 Ngyn nhn gy ra chy n:

C nhiu nguyn nhn gy ra chy nhng quy v 2 nguyn nhn chnh: khch quan v ch quan.

- Khng thn trng khi dng la

- Dng la nhng ni cm la, ni c xng du, chy n

- Nm vt tn la, m la vo nhng ni c vt liu d chy

- S dng, d tr, bo qun nguyn vt liu khng ng k thut: cc bnh cha kh ca my hn, bnh ga nhng ni c nhit cao c th gy chy n.

- S dng in qu ti, chn dy dn khng ph hp, s dng htit b in khng an ton.

- Chy do ma st, va p, chy do st nh.

- Chy do cc cht c kh nng t chy khng c bo qun ng qui nh.

2.2 Cc bin php phng chy:

Phng chy l mt tp hp cc bin php v k thut v t chc nhm ngn nga khng cho m chy xy ra, hoc khi xy ra th khng cho m chy lan rng.

a) Bin php v k thut:

p dng n cc tiu chun v phng chy, khi thit k v thi cng cc cng trnh tm trn cng trng, cng nh trong qu trnh sn xut v s dng chng. C ni qui, bin ba nghim cm dng la nhng ni cm la hoc gn cht d chy, cm hn h quang, hn hi khu vc c xng du, c cc cht d chy n, Cm s dng in un nu khng ng qui nh.

Bin php hn ch khng cho m chy lan rng ch yu khu thit k v qui hoch v tr cc cng trnh tm. Khi thit k mt bng t chc thi cng, cc cng trnh tm c nguy c chy n cao b tr cui hng gi, cc v tr thp. Khong cch gia cc cng trnh tm c kh nng gy chy ly theo tiu chun phng chy, c th b tr gia chng cc cng trnh tm kh chy nh bi vt liu tr, bi cu kin BTCT hoc thp. V kt cu cc cng trnh tm c kh nng hay chy dc xy dng bng cc vt liu kh chy hoc khng chy nh gch, , BTCT, thp, tn. B tr ca, ng thot ngi ra khi khu vc m chy.

b) Bin php v t chc:

Tuyn truyn, gio dc vn ng mi ngi nghim chnh chp hnh cc ni quy an ton phng chy, cc php lnh phng chy, cha chy ca Nh nc. C cc hnh thc khen thng v k lut nghim minh.

2.3 Cc bin php cha chy:

cha chy c hiu qu, cn lm tt cc vic sau.

Thit k h thng bo ng khi c chy, chun b y cc cht cha chy, cc dng c v phng tin cha chy nhng v tr hp l c tnh ton thit k trc, chun b lc lng cha chy v cui cng l k thut cha chy.

a) H thng bo ng:

Trn cng trng c b tr kng bo ng v tr thun li, d s dng. C lp t h thng thng tin lin lc vi bn ngoi.

b) Chun b cc cht cha chy:

- cc ni c kh nng chy bnh thng do cc vt liu tre, g,...cht cha chy ch yu l nc. Cc bt nc d tr, cc hng nc cu ha b tr trn mng li cp nc cho cng trng, thng xuyn kim tra nc theo tnh ton cu ha.

- cc ni c xng du, cht cha chy l ct. Ct c cha trong cc b xy bng gch c l thot nc, chiu cao b khng qu 1m d ly ct.

Nu trong cc xng sn xut c in c xng du nn trang b cc bnh cu ha phun bt cha chy, hoc cc bnh phun kh tr cha chy.

c) Dng c v phng tin cha chy:

Phng tin v dng c cha chy c phn lm 2 loi: loi c gii v th s

- Loi c gii: gm c cc xe phun nc, xe thang my phun bt, my phun kh tr...

- Loi th s gm: thang, cu lim, x mc nc, xng xc ct, gu vy, ng pht nc, bao ti, cc loi bnh xt cm tay.

Cc loi ny c trang b rng ri nhng ni c kh nng chy, nhng ni qui nh c th sn mu gy s ch v d tm kim khi cn thit v ch cu ha khng c dng vo vic khc.

d) T chc lc lng cha chy:

Lc lng cha chy cng trng l i bo v chung ca cng trng, c nhim v bo v, an ton lao ng, phng chy v cha chy. T bo v ny phi c o to v nghip v c chuyn mn, thng xuyn kim tra, din tp rt kinh nghim v b xung kp thi phng tin v cht cha chy. Ngoi ra tt c cc thnh vin c mt khu vc chy u l lc lng cha chy theo php lnh ca Nh nc. V vy cng trng ngoi vic hc tp cc ni qui v an ton lao ng, cn ph bin v hng dn nhng k thut cha chy c bn cho tt c mi ngi lao ng.

Chng ix:

CNG TC AN NINH TRT T V V SINH MI TRNG

1. Cng tc an ninh trt t :

n v thi cng phi qun trit s CBCNV ca mnh khi lm vic trn cng trng khng c vo khu vc ln cn, khng c lm n o gy mt trt t. Vt t xe my ca n v thi cng phi tp trung ng ch quy nh. Trong qu trnh thi cng c bin php an ton khng nh hng n khu vc xung quanh. Cc trng hp s c do n v thi cng gy ra th n v thi cng hon ton chu trch nhim.

Trn cng trng thng xuyn b tr nhn vin bo v kim sot mi hot ng an ninh trt t trn cng trng. C s phi kt hp vi chnh quyn a phng bo v ti sn ca n v thi cng trn cng trng cng nh trnh cc hnh thc ph hoi khc.

ng k danh sch cn b cng nhn tham gia thi cng vi c quan c thm quyn ti a phng.

2. Cng tc v sinh xy dng :

V sinh xy dng l khi nim bao gm tt c cc cng vic v sinh trn cng trng xy dng nhm to ra mt mi trng lm vic tt, m bo sc khe v an ton lao ng cho ngi lao ng, gp phn tng nng sut lao ng rt ngn thi gian xy dng cng trnh.

bo m v sinh xy dng c tt, cn phi hp ng b# gia cc bin php v k thut v cc bin php v t chc. Cng tc v sinh xy dng bao gm v sinh trong cng trng v v sinh ngoi cng trng.

2.1. Cc bin php v k thut :

2.1.1. V sinh xy dng trong cng trng:

Khi thit k tng mt bng t chc thi cng n v thi cng c tnh ton n cc yu t:

- V tr cc bi thu gom rc thi xy dng trn cng trng

- T chc h thng rnh thot nc mt m bo khng xy ra hin tng ng nc khi gp tri ma.

- Khu v sinh b tr cui hng gi, gc khut m bo v sinh v m quan cho cng trng.

- B tr khu tp kt vt liu ri ti cc v tr kh ro, khng nm trn cc ng nc chy. C bin php che chn bi bng vi bt hoc phun nc khi gp tri gi to.

2.1.2. V sinh xy dng ngoi cng trng:

Cc xe my phng tin chuyn ch nguyn vt liu vo cng trng phi c bin php khng lm bn ng ph hoc khu vc ngoi cng trng nh cc xe ch ct, , si phi c ph kn bng vi bt; cc xe ch t tha, rc thi ra khi cng trng phi ch bng xe ben, hoc cc thng cha c che chn kn.

Bt buc cc li xe trc khi cho xe t cng trng ra th x phi kim tra mc gy bn, nhim cho ng ph c bin php c ra thch hp.

T chc phun nc trn nhng on ng gn khu vc cng trng thi cng hn ch bi bn nht l vo cc ngy nng nng.

C cc bin php chng bi, chng n, rung ng do cc my mc ca n v thi cng thi cng gy ra cho khu vc xung quanh cng trng.

2.2 Cc bin php v t chc:

- a "V sinh xy dng" vo ni qui lao ng cng trng.

- Thng xuyn gio dc tuyn truyn cho mi ngi lao ng c thc m bo v sinh xy dng trn cng trng.

- Gn trch nhim cho ngi lao ng qua vic "Khon sn phm" vi cc ni dung yu cu v khi lng, cht lng, thi hn, an ton lao ng v v sinh xy dng.

Chng x:

S t chc hin trng

1. S t chc hin trng :

Ghi ch: - Nhn s ban ch huy Cng trnh s c Cng ty b tr theo tnh hnh thc t (tu theo tnh cht, khi lng cng vic, tin thi cng)2.Thuyt minh s t chc ti hin trng :T chc iu hnh d n ti hin trng, chu s iu hnh ca Tng Gim c Cng ty v c mi lin h vi cc phng ban chc nng Cng ty.

Ti hin trng, ch huy trng cng trnh ph trch chung mi cng vic ti cng trnh. Sau ch huy trng l cc b phn chuyn mn gip vic v cc i trng xy lp c lin h mt thit vi nhau v tp trung iu hnh cc i thi cng theo tng chc nng ca mnh. Bao gm 3 i:

+ i thi cng ph .

+ i thi cng xy lp.

+ i thi cng c gii.

3. M t mi quan h gi tr s chnh v vic qun l ngoi hin trng:

- Tr s chnh l c quan iu hnh c thm quyn ti cao v c t cch php nhn chnh v ti khon, con du v quyt nh mi mt trong qu trnh trin khai d n, k kt hp ng kinh t vi ch u t.

- T chc hin trng chnh l t chc ca mt cng trng ln m ngi i din l ch nhim iu hnh hay cn gi l ch huy trng cng trng.

- Ch huy trng cng trng c quyn quyt nh mi vn x l k thut, iu ng lc lng trong ni b cng trng trong qu trnh thi cng xy lp.

4.Trch nhim v thm quyn giao ph cho ban ch huy cng trng.

Giao trch nhim cho cn b qun l hin trng (Ch huy trng) t chc qun l trc tip ch o k thut v 3 i thi cng. Cn c vo tin nh, c quyn iu phi thit b, xa my, nhn lc theo yu cu ca tng hng mc cng trnh, m bo s dng ht cng sut my mc thit b v y nhanh tin . Quan h vi k s t vn gim st v cc n v hu quan cht ch, m bo cht lng cng trnh xy dng, an ton lao ng, v sinh mi trng, v trt t an ninh trong khu vc thi cng. Thng xuyn bo co v cng ty nm c tnh hnh ngoi hin trng c bin php x l kp thi cc vng mc.

CHNG Xi : TIN THI CNG V KT LUN

Trn c s phn tch nh gi cc mt thun li v kh khn c th pht sinh trong qu trnh thi cng cng nh cc gii php, bin php k thut thi cng ra, n v thi cng hoch nh tng thi gian hon thnh l 179 ngy, sau khi cn c vo cc c im sau:

- Cn c vo quy m v khi lng xy dng ton cng trnh (s lng cc hng mc xy dng)

- Cn c vo mc phc tp ca tng loi kt cu cng trnh.

- Cn c vo kh nng iu ng my mc thit b v nhn lc .

- Cn c vo cc tiu chun Vit Nam (TCVN) v cc quy trnh quy phm hin hnh v bo m cht lng cng trnh.

Bin php bo m tin thi cng cc hng mc :

Tin thi cng s c m bo tr trng hp bt kh khng xy ra. Nh thu s c nhng bin php nhm khc phc nhng yu t lm chm tin thi cng. Ngoi ra cc trng hp khc, nh my mc,vt t nh thu s c trch nhim cung ng v sa cha khi cn thit. m bo tin thi cng ra.Trn y l thi gian cn thit thi cng ton b cng trnh. Mi thnh phn cng vic trong tng hng mc hoc chuyn tip t hng mc ny sang hng mc khc c thi cng song song v xen k. Trnh t thi cng c thc hin ng theo quy trnh quy phm k thut xy dng cng trnh (TCVN) v ng yu cu k thut m H s mi thu ca Ch u t quy nh.

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