Bao Cao Thuc Tap Cong Nhan Nganh Cau Duong Dh Xay Dung 212168

8/12/2019 Bao Cao Thuc Tap Cong Nhan Nganh Cau Duong Dh Xay Dung 212168

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BO CO THC TP CNG NHN

QUANG THNG_NUCE Page 1

LI NI U

Trong x hi tr thc v trong nn kinh tthtrng hin nay vic o to con

ngi khng chdng mc l thuyt m cn phi bit kt hp nhun nhuyngia l thuyt v thc hnh. Nht l vic o to ngnh kthut, thc t, thc hnhv kinh nghim i khi cn quan trng hn cl thuyt. Do , trng i hc,p ng c yu cu , tchc t thc tp cng nhn nh mt mn hc

bt buc. Thc tp cng nhn l mt dp gip cho sinh vin c iu kin tip xcthc tsn xut cc n v, qua c c hi lm quen vi cc cng vic thc tsn xut, tip cn vi nhng vn chuyn mn, k thut trong lnh vc mnhnghin cu, y l lnh vc xy dng Cu ng. Ngoi ra, n cn gip sinhvin cng c, bsung, kim nghim v p dng nhng kin thc hc trong nhtrng thng qua cc hot ng thc tcc c ssn xut.

Kho 52 Cu ng bt u nhim vthc tp ti cng trng tngy13/7/2010 n 31/07/2010. Nhm em c phn thc tp ti cng trng ang thicng tng hm ca dn : THp Khch Sn, Vn Phng, Trung TmThng Mi , Gio Dc V Cn HRoyal City

Trong thi gian thc tp chng em c squan tm, hng dn v cho tntnh ca i ng cn b, ks cng nhn v cc thy trong bmn Cu hm, v thchng em c lm quen hc hi c rt nhiu kin thc chuyn mn cngnh cc kin thc vthc t, n rt c ch cho qu trnh cng tc sau ny ca bnthn em.

Bn bo co gm c nhng ni dung sau:1.Nhim v, mc ch, ngha ca qu trnh thc tp2. Gii thiu chung vdn Royal City3. Nht k thc tp cng nhn4. Bin php thi cng tng vy5. Bi hc v suy ngh sau qu trnh thc tp

Em xin gii li cm n n cc thy c gio trong bmn cng nh cc anh chtrong ban iu hnh dn gip em trong t thc tp ny.

H Ni, ngy 1 thng 8 nm 2010


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Phn INhim v, mc ch, ngha ca qu trnh thc tp

I . Mc ch:Mc ch v ngha ca t thc tp:

+ Gip sinh vin bit cch p dng phn l thuyt c trang btrong nhtrng vo cc cng vic thc tnh: Kho st thit k, cc bc lp hs thit kv tchc thi cng mt cng trnh cth.+ Nm bt c tng qut nhng chi tit trong cng vic thit kcu,hm, nhng

yu cu cthtrong cc giai on thit k: lp dn , thit kk thut, thit kbnvthi cng...+ Quan st vic p dng cng nghtin hc vo cng vic thit k.+To iu kin cho sinh vin lm quen lm quen v to quan htt vi cc C

quan trong ngnh giao thng vn ti, cng nh cc cng ty t vn v cng ty cngtrnh giao thng gp phn to iu kin thun li cho vic lin hcng vic sau khitt nghip.I I . Nhim vca sinh vin:+ Nghim tc thc hin ni quy gigic, klut v bin php m bo an ton lao

ng ca c quan ni thc tp.+ Chp hnh nghim chnh sphn cng ca cn bc quan v hon thnh tt

nhim vc giao.+ Tch cc tm hiu, hc tp, hon thnh tt cc nhim vc nh trng giao.+ Tranh thhc hi kinh nghim ca nhng ngi i trc bit thm v cng

ngh thi cng cng nh- t chc cng tr-ng, c th nm vng hn v chuyn

mn phc v cho cng vic ca bn thn sau ny.+ Sau mi bui thc tp phi vit nht k thc tp. Kt thc t thc tp sinh vinphi vibo co thc tp v bo vbo co thc tp ca mnh .


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Phn IIGii thiu chung vdn " Thp khch sn, vn phng, trung tm thng

mi , gio dc vcn h- Royal Ci ty"T hp Royal cityD n c din tch mt bng 120.945 m2, to lc ti 74ng Nguyn Tri, Q. Thanh Xun, TP.H Ni.

Thng tin chi titKhu vc: Q.Thanh Xun, H NiLoi hnh: Khch sn, Nh hng, Vn phng,Trung tm thng mi, Chung c, Cn h caocpTng din tch: 130000 m2Tng mc u t: 10000 t VN

Khi cng: 16/01/2010D kin hon thnh: 2013Trng thi d n: ang thi cngCh u t: Cng ty C phn Vincom

Bn quy hoch

M t d nI. V tr:

- S 74 ng Nguyn Tri, Q. Thanh Xun, TP.H Ni.

- Pha ng Nam gip ng Nguyn Tri.
http://media.landtoday.net/library/images/2010/01/3029_d%C3%B4i.jpghttp://media.landtoday.net/library/images/2010/01/3028_dienoi.jpg


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- Pha Ty Bc v Ty Nam gip khu dn c phng Thng nh.

Mt bng cng trnh.

II. tng

Royal City c thit ktheo m hnh thp thphc hp, ly im nhn lkhu cng vin cy xanh rng 70.000m2. c im ni bt trong thit kca RoyalCity l sgiao thoa hi ha gia li kin trc hong gia chu u sang trng, lchlm v cch sp t tm, tinh tca chui ni tht tin nghi, hin i. c thitkbi Site Architecturemt tp on danh ting ca Php, tng vcuc sngtin nghi Xanh Thng minh - ni hi ttinh hoa ca nghthut v cng nghhin i, strthnh hin thc ti Royal City.

III. Quy m:

- Tng din tch d n :130.000 m2.- Din tch xe: 300.000 m2.

Theo thit k, Royal City l mt t hp gm khch sn cao cp, vn phng chothu, trung tm thng mi, cc khu nh chung c cao cp cao tng v trnghc, nh tr mu gio, vn hoa cy xanh cngvin.


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Chu t:Cng ty Cphn u t v Pht trin a c thnh phHong Gia,Cng ln: Cng ty CphnVincom,Cng ty CphnDu lch Vinpearlland,T vn v thit k:Tp on thit kSite ArchitecturePhp:Cng ty CphnPCM

Ch tch HQT Cng ty CP Vincom L Khc Hip cho bit: yl d n angc nhiu ngi ch i khng ch v tnh tin ch, a chc nng hay v tr giaothng thun li m cn l mt khu th xanh vi rt nhiu khong khng gianm v kin trc sang trng kiu hong gia, gp phn to im nhn mi p vhin i cho th H Ni. Khi hon thnh,Royal City ha hns tr thnh mtkhu th cao cp, p ng nhu cu ca mi i tng".

Royal City l mt trong nhng d n m cc nh ut t nhiu k vng. y

cng l mt d n ang c nhiu ngi ch i khng ch v tnh tin ch, achc nng hay v tr giao thng thun li m cn l mt khu th xanh vi rtnhiu khong khng gian m v kin trc sang trng kiu hong gia, gp phnto im nhn mi p v hin i cho th H Ni.
http://vincom.com.vn/http://vincom.com.vn/http://vincom.com.vn/http://vinpearl.com/http://vinpearl.com/http://vinpearl.com/http://vinpearl.com/http://vinpearl.com/http://site-archiconcept.com/http://site-archiconcept.com/http://site-archiconcept.com/http://site-archiconcept.com/http://site-archiconcept.com/http://site-archiconcept.com/http://site-archiconcept.com/http://site-archiconcept.com/http://site-archiconcept.com/http://site-archiconcept.com/http://site-archiconcept.com/http://www.landtoday.net/vn/tintuc/21347/index.aspxhttp://www.landtoday.net/vn/tintuc/21347/index.aspxhttp://www.landtoday.net/vn/tintuc/21347/index.aspxhttp://www.landtoday.net/vn/tintuc/21347/index.aspxhttp://site-archiconcept.com/http://vinpearl.com/http://vincom.com.vn/


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Sau y l mt shnh nh ti cng trngHnh nh quan st btr thp tng vy (lng thp):


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Hnh nh my thi cng ti cng trng :


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Phn IVBin php thi cng tng vy

Theo thit k, tng vy c chiu rng 1000mm v cao y tng vy l -

40,95m (so vi cao 0.00).

Theo bn vthit k c ph duyt, theo iu kin a cht v iu kin thi

cng thc tca dn. Tng vy sc chia thnh cc panel v c thtthi

cng khc nhau.

Cc lng thp c chto cho cc panel tng vy

Mc ch ca vic thi cng tng vy l sau ny ddng cho vic thi cng

tng hm v ngn nc gia bn trong v bn ngoi nh (kt cu tng sl in ktvi cc kt cu khc nh sn, dm li cng .).tng vy sau ny sl kt cu

chu lc mt phn do tng ,ti trng cng trnh truyn xung,khoanh vng cng

trnh, nh hnh mng v khng lm nh hng ti cng trnh bn cnh


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Mt bng chia tm tng vy

1.Trnh tthi cng

1.Cng tc chun b.

H s lin quan ti tt c thit b, vt t s c trnh v ch s ph

duyt, chp thun ca Ban qun l dn trc khi tin hnh thi cng.

Vt t thit bphc vcho thi cng khi v ng phi c bo

qun, bo dng sao cho trnh cc h hi hoc khng thsdng c.

Chun bmt bng, ng thi cng trong khu vc my di chuyn.

mm


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My i san lp mt bng v to li i

Thi cng gii phng mt bng(my o)


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Cn cvo tin thi cng, my mc v trang thit bcn thit sc iu

ng lp rp y cho vic thi cng.

Cung cp dung dch gin nh thnh vch Polymer (bentonite). Dung dch

Polymer (Bentonite) c trn bng my trn tc cao c thng trn vidung tch 2,5m3, sau khi trn xong s c cha trong si l t

80105m3/sil v cc bcha c lm bng b tng hay xy gch c dung

tch khong 225m3/b. Cc sil v bcha ny t ti v tr thun tin cho

vic bm v thu hi dung dch tho trong qu trnh o v b tng.

Dung dch o c bm cp hay thu hi bng bm chm c cng sut

11KW v bm in c cng sut ln qua cc ng ng mm 100 ~120

v ng ng cng 150.

Silo cha bentonite


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.2Cng tc trc a, nh v.

Vic chia kch thc cc t

.Cn cvo bn v thit kv bn vchia tm c ph duyt cho vic

thi cng, i trc c snh du vtr tim ca tng vy thi cng tng

dn.

3 .Thi cng tng dn

Vic thi cng tng dn nhm nh vvtr ca tm tng sthi cng sau

ny v tng dn snh hng gu o, kch thc khong cch gia hai

vch ca tng dn sphi m bo l gu o sc ththun tin xuyn

qua v khng lm lch hng gu o trong qu trnh o. Ngoi ra, tng

dn c dng bo vthnh vch ca ho ti lp a tng t u tin v

trnh bst lthnh vch ti lp a tng ny bi sc nng v sdi chuyn

ca my trong qu trnh lm vic hay thi cng b tng. Tng dn phi

cao duy tr p l (bentonite) theo nh yu cu,

trnh cc vt liu hay cht bn ri vo ho. Tng dn phi su

trnh tnh trng bt xi mn do s tc dng c

. Tng d mt tt hin hu khong 20 40cm. Tng dn phi c nh v v gi n

nh trong sut qu trnh thi cng.

Sau khi bphn trc a nh v v tr v tim, ta ca tng, My o

chuyn dng v nhn cng ph tr sc dng o t v chnh sa

kch thc ho ti vtr cn thi cng tng dn.

Sau khi o xong, v chnh sa cao y nh yu cu, b tng mc thp s

c dng lt y ho trc khi thi cng bc tip theo.Sau khi thi cng b tng lt v b tng cng, ct thp ca tng dn

c ct un nh bn vsc lp t vo vtr, vn khun y sc

han thin v cng tc b tng y sc trin khai khi nghim thu cng

vic han thnh.


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Sau khi phn y ca tng dn thi cng xong 10~12 ting, cng tc ct

thp ca thnh tng dn stip tc trin khai v hon thin trc khi cng

tc vn khun thnh tng dn c tin hnh.

Khi cng tc ct thp v vn khun hon thnh, cng tc b tng thnhtng dn sc trin khai, sau khi cng tc b tng thnh tng dn hon

thnh, vn khun sc tho 12 ting sau khi b tng.

Sau khi tho xong vn khun, trc c tin hnh hon cng ta , cao

nh tng dn, thng ng, khong cch thnh tng dn v tin hnh

lp t tng dn.

Cng tc thi cng tng dn sthi cng theo tng phn an, v cng vic

thi cng tng dn s thi cng lp li nu trn p dng cho tt ccc phn

an.

Vic thi cng tng dn l rt quan trng, tng dn c thi cng hon

thin theo ng yu cu squyt nh vic hng cho gu o sau ny o

cc tng khng blch h

.

4.Di ri vt cn

Trc khi tin hnh cng tc o t, dng my o di di chng ngi vt

trn mt t hay bmt bn di mt t (nu c).

Nu pht hin bt c vt cn g bt thng trong qu trnh chun b cng

nh trong qu trnh o t. Nh thu sthng bo ngay ti Ban qun l d

n bit.

5.a my o vo vtr.

Sau khi thi cng xong tng dn, trc khi tin hnh o, i trc a snh du v ghi chp s liu theo nh nhng g yu cu ti ph lc BM02,

cn cvo . My o sc a ti vtr tin hnh o.

My cn trc bnh xch loi chuyn dng v gu o thy lc Masago s

c sdng cho vic o t ca tng vy. Kch thc ca gu o c b


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rng l l 1.0M, bngang l 2.8m ) v chiu cao

l 8m. Trc khi o t, my o di chuyn ti vtr v nh cn ti vtr

pully cp treo gu o sc t ng vtr tim tng vy hay tm tng

vung gc vi mt t, yu cu l v tr ngai cng pully phi cch cngtrnh ln cn t nht l 0,5M. Khi tin hnh thi cng, nn t sc tri tn

cn trc bnh xch d , cng nh phn tn lc tp

trung tc dng trc tip vo nn t.

Gu o tng vy

Kim tra scn bng ngang ca cn trc treo gu o bng thit bo cn

bng mc nc m bo khi o ho sthng v khng blch hng

ca ho trong khi o. Vic kim tra ny skt hp vi vic sdng qu

ri kim tra sthng ng v lch hng ca cp treo gu o trong

qu trnh o.

.


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6 .Cng tc o h.

Cng tc o tm tng cn c sp xp theo mt trnh tsao cho cc tm

va c xong khng b tn hi. Cc tm tng vy chc php o khi

tm tng vy ngay st bn cnh c b tng xong khng t hn 72gi.

Trc khi o, dung dch Polymer (Bentonite) sc chun bgin

nh thnh ho. Cn cung cp dung dch n nh thnh vch lin tc, cao

dung dch phi m bo gicho p lc ca dung dch lun ln hn p

lc ca cc tng a cht, mc nc ngm pha ngoi lo v lun cao hn

mc nc ngm t nht 0,5m hay tng ng vi cao mt t n nh

thnh ho. Trong qu trnh o nu dung dch n nh thnh vch gim

xung t ngt th s bo cho cc bn lin quan bit v x

.

Dung dch polymer dng cho n nh thnh vch khng dbphn hy, bn

khoan rt dng xung pha di do polymer sc ti sdng, vic

ti sdng ny sc kim tra vcc chsc bn cn ctheo cc chs

yu cu k thut vdung dch, polymer bbin i ph vcc chui lin kttrong qu trnh b tng v b tng s gii thot Ca2+, v vy s dung

sodium carbonate gim thi cc cht ny nhm trnh s phn hy ca

polymer. Vic bsung bt polymer c cc chsvnht, PH, t

trng nh yu cu ti sdng.


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Bm bentonite vo ho

Dung dch polymer qua sdng sc bm trc tip tho vb

hi tc thi hoc ln trn silo. Polymer qua sdng sc cha vo

silo c nh du v silo ny skhng cha polymer mi trong sut qu trnh

thi cng.Phn polymer c qua sdng m c ln tp cht (qu nhiu ct v c b

ph hy do b tng) sc phn hy bng cch trn ln vi sulfate nhm

vi t l t1/750~500. sau khi trn hai gith nht gim xung cn 28

giy v PH cn t6 ~ 9 v c coi nh l nc thng thng v thi

bnh thng ra ng thot nc thng thng.

Bn t c o v a ra khi ho bi smv ng bng thy lc

ca gu o v a ra khi ho bng cc hot ng ca cu treo o di

siu khin ca nhn vin phtrch my o.

Gu o a t bn ra ngoi bng cch nng ln ttbi ti cu, vic nng

hay hgu o yu cu phi lm tttrnh st lthnh vch ca ho.

thng ng ca ho trong qu trnh o c kim tra bng quri v

mc nc (kim tra dy cp treo gu v cn bng my cu treo gu).Song


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song cc tm u tin c20m sc kim tra thng ng bng thit

bKODEN (t nht l 2 tm u tin).

Kch thc v thng ng ca ho phi c kim tra v nghim thu

bng thit bkim tra thng ng sau khi o xong. Slng tm tngkim tra ti thiu l 25% tng stm tng vy.

t o tho sra mt bng v chuyn ln xe tbng my xc

sau chuyn ti bi .

7 .Xc nh chiu su ho v cc lp a cht thc t

Dng thc o bng dy 50m/100m o su ca ho.

Cng tc o c tip tc khi t ti su theo yu cu(cao

tng vy) trong bn vc ph duyt, so snh vi ti liu a cht ca

cng trnh v a cht ly tho cao y tng vy.

Tt c thng tin va cht h o thc t sc ghi chp v xc nhn

trong qu trnh o bao gm c im lp a cht, su, mt ct cc lp

a cht. sly mu ca mi tng a cht v v tt ccc mu ny sc xc

nhn ca Chu t v slu sau giao li cho Chu t.

8 .Lm sch y ho ln 1.

Sau khi hon thnh cng tc o v kim tra su ca ho, thi gian

chcho lng cn lng xung y h 60 pht. Dng gu o

vt lng ra khi y ho.

Dng thc o xc nhn su ho chnh thc cui cng sau khi vt

lng sau tin hnh vic hlng thp.

9 .Lng thp.9.1 Gia cng v hlng thp v ng siu m.

Thp c gia cng ng theo bn vchi tit thi cng c ph duyt ti bi

gia cng thp. Trong mi lng thp, ai thp gia cng u lng ngoi vic

c cnh cht vo thp chbng phng php buc, cc sit cn c


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cnh thm bng cc thanh chn (con b) cng c hn vo thp ch

m bo lng thp khng bbin dng trong khi nng ln hay hlng vo v

tr ho.

Lng thp

y nhanh tin thi cng, gim thi gian ni lng ti h, Nh thu tin

hnh ni 02 lng di 11.7m thnh mt lng di 20.7m ti bi gia cng thp.

Lng c ni ng theo bn vchi tit thi cng c ph duyt.

2 Lng ngn c ni thnh 1 lng di


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ng siu m sc gia cng v lin kt vi nhau bng lin kt hn. Cc

ng ny c lp t trc trong lng thp v cnh bng dy km buc

11.5mm.

Vtr t ng siu m

Khi gia cng lng thp, cn ch ti cc v tr shng sau ny, v tr

cc thp ai n, thp ch sn, thp ch dm ca lng thp c th dch

chuyn thun tin trong qu trnh lp ng v b tng.

Ti sn tng hm 5, ton bthp chsc t thp chc c Coupler

ni thp sau ny. Thp chc gn coupler slp t trong qu trnh gia cng

lng thp v lp t vo ho sau ny.

ia cng.


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9.2Htm chn u.

Tm chn u ca mi tm tng vy gip xc nh chnh xc chiu di

tng tm theo ng nh thit k, ng thi cng l thit blp t giongchng thm gia 2 tm tng vy. Vi cng trnh 5 tng hm v yu cu ca

t vn thit k, nh thu chn tm chn u c chiu rng 1000mm v chiu

di 25m. Giong chng thm c chiu di l 24m.

Tm chn u c thhtrc hoc sau khi hlng thp ty theo iu kin

thc t

.

Htm chn u

9.3Hlng, ng siu m.

Vic lp t cc on ca lng thp sau khi gia cng xong sc nng lnbi 02 my c nh

cu thhai nng lng bng hpuly. (chi tit xem thm Bin php ni lng

v cu lng thp di.


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Buc v chun bhlng thp tng vy


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Hlng thp

Lng thp c h ln lt tng lng mt. Vi tm tng ln thp nhiu

lng th cc lng y c htrc theo thtv cc lng tip theo sc

tin hnh lp li.

Phn u ca lng thp c hbn trong ho v ginh tng dn

bng cy treo bng thp gc ngang qua thnh tng dn. Cy treo ny ngng

ngang qua vtr ai gilng thp v m bo rng phn thp ni ca lng

ni theo yu cu cho lng tip theo. Khi ni lng thp phi ch sao cho

lng thp thng ng (kim tra bng dy di),trnh cc va chm vo thnh

vch ho.


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Thp buc, cc ni lng s dng cho ni thp gia cc lng. Sau khi ni

xong, lng thp c nng, cy ngng c di chuyn v lng thp c h

xung. Cc on lng thp cui cng c ni cng nh phng php trn.

Cc ng thp dng cho vic siu m c lin kt vi ct thp ca lng thpv hng thi trong qu trnh hlng thp, cc ng ny c ni vi nhau

qua ng ni bng phng php hn.

Do yu ca thp chcho thi cng sn cng nh thi cng cc cng tc tip

theo, yu cu cc cao chthp v cao nh lng c stnh tan chnh

xc, nhm tin li cho vic thi cng cc bc tip theo ddng, thun tin.

9 .4Hng .

ng dng cho vic b tng c di t0,5~3,15m v 273mm ng

knh ngoi. ng phi sch, kn nc v mi ng c mt u c v

mt u ci c rng xit ni lin kt v

.

Dng my cu hng vo bn trong lng thp ca tng vy. Ty theo

kch thc ca tm tng vy m ssdng t2 cho n 3 ng (hai hay

ba vtr b tng trong mt tm tng). ng sbtr sao cho khi h

ng cng nh trong sut qu trnh b tng s m vo ct thp ca

lng thp.

Bbn c ca m/ng kha ng . Ca ng/mbao gm hai cnh

thp c lgia ging . Bn sk trc tip ln nh ca tng

dn.

on u ca ng c nng ln bi my cu (np cui) v t vo gialca 02 cnh thp dng ging . on ng tip theo c nng ln

v ni vi on u bng inh vt gia u c v u ci. My cu nng

ng xp x0.5m (dng thit bng ni) v ca c m. ng c

h, ca ng v ng kha cho ln lp tip theo.


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Chiu di ng ph hp trong vng 03m ca y bi on cui cng l

o

.

9.5 Thi ra lm sch ln 2.

Sau khi h lng, lp hon chnh ng , yu cu thi ra lm sch y h

o ln 2, kim tra bng qudi gn vo thc o xc nh cng vic

cn lm tip theo. Nu nh sau khi h lng thp m lng y tng

vy khng ln h , nh thu tin hnh b

tng.

Phng php thi ra y ho ln 2 sc tin hnh theo hai phng php

sau:

Lm sch Polyme (Bentonite)bng cch bm tun hon dung dch ny vo

ho cho ti khi ct bn o ng li y ho khng cn hoc cn

rt t (khng c l ).

Phng php thi kh: dng ng c ng knh khong 90mm thng qua

ng ni vi u ni ca dng c thi ra y ho, hng mm c

ng knh 21mm cng vi ng c ng knh 90mm xung cch y ho khong 03 ~ 0,5m, ng ny sc ni vi my nn kh. Lng cn s

c bm trc tip ra khi y ho bng cch nng nn bi p lc ht

ca kh nn thng qua ng thp v ng cao su 90 ti b thu hi. ng

thi, bm cp dung dch mi tb thay th dung dch trong ho. Qu

trnh ny c tin hnh cho n khi lng cn trong h o khng l

c xc nh bng cch o bng thc

dy 50m/100m. Khi t yu cu nh thu s tin hnh cc cng vic tiptheo.


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Xe chb tng trn

Phng php thi kh thng qua ng bng cch bt u trn ca ng ,

a kh tmy nn kh c p lc ln xung di h thng qua ng m21. kh sy dung dch trong ng ra ngoi qua

co ni v to lc ht chn khng ht ct hay bn lng y ho a

ra ngoi thng qua co ni pha trn nh ng

.

10.b tng.B tng c ngay sau khi nghim thu cc cng vic cui cng trc khi

b tng.


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Dng nt dch chuyn tm thi (dng phao bng ht xp, cao su hoc nt

lnh) sc thvo trong ng m bo cho m va b tng u tin

khng tip xc trc tip vi dung dch khoan trong ng b tng v loi

trkhong chn khng khi b tng. y c t cao hn 20cm sovi y tng vy khi mb tng u tin cng nhm mc ch v

.

Cu phc vc sdng nng v gn phu vi ng . Btm thi

(bn ) trn nh tng dn gn v tho phu trong sut qu trnh

b tng. Phn phi b tng ttrm trn ti cng trng phi c siu phi

hp l, b tng sc xqua mng, rt trc tip ti phu gn trn ng .

Cao b tng sc kim tra bng thc o trc khi tho mi on ng

trong qu trnh b tng cng nh kt thc mi xe nhm xc nh

cao dng b tng. Mi on ng chc tho ra khi cao b tng cao

hn cao phn y ng cn li t nht l 3.0m. m bo ng Tremie

ngp trong b tng t nht 3.0m squyt nh bng cch tnh cao trnh dng

b tng khi , sau tri smt di cn ngp trong b tng bit rng

smt ngm trong b tng, sau squyt nh ct ng tremie hay tip tc

b tng.

lun phin gia 2 hoc 3 ng (ty theo chiu di tng tm) b tngdng u trong ton bchiu di tm tng.

Trong qu trnh b tng, my cu nng v hng (xp x0.4m)

m bo vic lu thng b tng tnhin trong ng .

Khi b tng t n nh tng vy, b tng thm sc php vut qua

cao p u tng vy ra xp x1m hay bng cao dng b tng theo

thit k m bo cho phn b tng c ln tp cht ny khng lm nh

hng ti cht lng b tng ca u t.


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b tng )

.

btng

a. Vt b tng ln tp cht u tng vy.Sau khi hon thnh cng tc b tng v b tng dng ti cao yu cu.

Bng cch quan st cng nh cn cvo khi lng b tng khong thi

gian sau cng bit c l b tng t yu cu (thng thng bphn

b tng dng u trn khong 0.6m). Nhn cng sc sdng vt phnb tng ny ti v tr cao hn y dm nh tng vy hay dm nh tng

khong 10cm (cao y dm nh tng -2.3m so vi ct 0.00 ca cng

trnh). Phn nh tng hay tng vy sau khi vt sc y bng t nn


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bo vphn ct thp ch, ng siu m bn trn v to mt bng thi cng

sau ny.

b.Rt tm chn u:Sau khi b tng t nht 72 gic th rt tm chn u ln. o tm k

bn ti chiu su vt qua chn tm chn u. Dng ba rc c hoc gu

o tch cra khi b tng. Dng cn cu v my xc rt tm chn

u ln sao cho khng lm bong, rch tm giong chng thm. Tm chn

u s c v sinh sch s chun b cho thi cng tm tng vy tip

theo.

Nu nh khng thlay nhcthp th dung ba rc ctch cra khi b

tng. Ba rc csc chto v c trnh ring sao cho trong qu

trnh rc khng l tn hi n giong chng thm cng nh tn hi ti b

mt b tng.

Tm hiu thm vcng nghthi cng top- down sdng trong qu trnh thi cng

Trong cng ngh Top-down, cc tng hm c thi cng bng cch thi cng phntng vybng hcc barrettexung quanh nh (sau ny phn trn nh ca tng

vy dng lm tng bao ca ton b cctng hm) v hcc khoan nhi(nmdi chn ccmng ct)bn trong mt bng nh. Tng vy thi cng theo cngngh cc nhi b tng ti ct mt t t nhin hoc ct tng trt (ct khng).

Trong trng hp h tng vy c thi cng ti mt t t nhin thp hn ct nntng trt th, thay v thi cng Top-down ngay t tng trt, c th bt u thi cngtop-down t mt nn tng hm th nht (sn tng hm u tin), bn di mt t.Khi , tng hm th nht c thi cngbng phng php t di ln (bottom-up) truyn thng, phn tng vy trn nh c nhim v nh h tng c gi thnhh o. Trng hp ny cng c th gi l bn Top-down hay "S mi" top-down

(semi-top-down).

Ring cc cc khoan nhi b tng nm di mng ct pha trong mt bng nhth khng thi cng ti mt t m ch ti ngang ct mng (khng tnh phn b tngu cc nhi, phi ty b i sau ny). Phn trn chu lc tt, ngay bn di mngca cc cc nhi ny c t sn ccct thpbngthp hnh,ch di ln trn tict khng(ct nn ngay ti mt t). Cc ct thp hnh ny, l tr cc tng nh
http://vi.wikipedia.org/w/index.php?title=T%C6%B0%E1%BB%9Dng_v%C3%A2y&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=T%C6%B0%E1%BB%9Dng_v%C3%A2y&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=C%E1%BB%8Dc_barrette&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=C%E1%BB%8Dc_barrette&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=C%E1%BB%8Dc_barrette&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=C%E1%BB%8Dc_khoan_nh%E1%BB%93i&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=C%E1%BB%8Dc_khoan_nh%E1%BB%93i&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=C%E1%BB%8Dc_khoan_nh%E1%BB%93i&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=M%C3%B3ng_c%E1%BB%99t&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=M%C3%B3ng_c%E1%BB%99t&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=M%C3%B3ng_c%E1%BB%99t&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=C%E1%BB%91t_th%C3%A9p&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=C%E1%BB%91t_th%C3%A9p&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=C%E1%BB%91t_th%C3%A9p&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Th%C3%A9p_h%C3%ACnh&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Th%C3%A9p_h%C3%ACnh&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Th%C3%A9p_h%C3%ACnh&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=Th%C3%A9p_h%C3%ACnh&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=C%E1%BB%91t_th%C3%A9p&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=M%C3%B3ng_c%E1%BB%99t&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=C%E1%BB%8Dc_khoan_nh%E1%BB%93i&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=C%E1%BB%8Dc_barrette&action=edit&redlink=1http://vi.wikipedia.org/w/index.php?title=T%C6%B0%E1%BB%9Dng_v%C3%A2y&action=edit&redlink=1


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hnh thnh trong khi thi cng Top-down, nn n phi c tnh ton chu ctt c cc tng nh, m c hon thnh trc khi thi cng xong phn ngm (gmtt c cc tng hm cng thm mt s hu hn cc tng thuc phn thn nhtrc). Tip theo o rnh trn mt t (lmkhun dm), dng ngay mt t

lm khun hoc mt phn cakhun cdm v sn b tng ct thp ti ctkhng. Khi b tng sn ct khngphi cha li phn sn khu thang b lnxung tng ngm, (cng kt hp vi thang my) ly li o t v a t lnkhi thi cng tng hm. Sn ny phi c lin kt chc vi cc ct thp hnh lmtr ch sn nu trn, v lin kt chc vi h tng vy (tng vy l gi chulc vnh vin ca sn b tng ny). Sau khi b tng dm, sn ti ct khng tcng tho d khun c, ngi ta tin hnh cho my o chui qua cc l thangch sn nu trn, xung o t tng hm ngay bn di sn ct khng. sau li tin hnh b tng sn tng hm ny, ngay trn mt t va o, tng t thicng nh sn ti ct khng, ri tin hnh lp ghp ct thp ct tng hm, lpkhun

ct tng hmv b tng chng.

C lm nh cch thi cng tng hm u tin ny, vi cc tng hm bn di. Ringtng hm cui cng thay v b tng sn th tin hnh thi cng kt cu mng vi mng.

ng thi vi vic thi cng mi tng hm th trn mt t ngi ta vn c th thicng mt hay vi tng nh thuc phn thn nh bnh thng. Sau khi thi cng xonght cc kt cu ca tng hm ngi ta mi thi cng h thng thang b v thangmy ln xung tng hm.
http://vi.wikipedia.org/wiki/Khu%C3%B4n_%C4%91%C3%BAc_b%C3%AA_t%C3%B4nghttp://vi.wikipedia.org/wiki/Khu%C3%B4n_%C4%91%C3%BAc_b%C3%AA_t%C3%B4nghttp://vi.wikipedia.org/wiki/Khu%C3%B4n_%C4%91%C3%BAc_b%C3%AA_t%C3%B4nghttp://vi.wikipedia.org/wiki/Khu%C3%B4n_%C4%91%C3%BAc_b%C3%AA_t%C3%B4nghttp://vi.wikipedia.org/wiki/Khu%C3%B4n_%C4%91%C3%BAc_b%C3%AA_t%C3%B4nghttp://vi.wikipedia.org/wiki/Khu%C3%B4n_%C4%91%C3%BAc_b%C3%AA_t%C3%B4nghttp://vi.wikipedia.org/wiki/Khu%C3%B4n_%C4%91%C3%BAc_b%C3%AA_t%C3%B4nghttp://vi.wikipedia.org/wiki/Khu%C3%B4n_%C4%91%C3%BAc_b%C3%AA_t%C3%B4nghttp://vi.wikipedia.org/wiki/Khu%C3%B4n_%C4%91%C3%BAc_b%C3%AA_t%C3%B4nghttp://vi.wikipedia.org/wiki/Khu%C3%B4n_%C4%91%C3%BAc_b%C3%AA_t%C3%B4nghttp://vi.wikipedia.org/wiki/Khu%C3%B4n_%C4%91%C3%BAc_b%C3%AA_t%C3%B4nghttp://vi.wikipedia.org/wiki/Khu%C3%B4n_%C4%91%C3%BAc_b%C3%AA_t%C3%B4nghttp://vi.wikipedia.org/wiki/Khu%C3%B4n_%C4%91%C3%BAc_b%C3%AA_t%C3%B4nghttp://vi.wikipedia.org/wiki/Khu%C3%B4n_%C4%91%C3%BAc_b%C3%AA_t%C3%B4nghttp://vi.wikipedia.org/wiki/Khu%C3%B4n_%C4%91%C3%BAc_b%C3%AA_t%C3%B4ng

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