De cuong KSTK

PHN 6 CNG TC B TNG V CU Mc 06910 Khe co gin

MC 06910 KHE CO GINMC LC

21.M T

22.H S TRNH NP

23.CHP THUN VT LIU

24.VT LIU CO GIN

24.1.THP

24.2.CAO SU

35.PHNG PHP THI CNG LP T

46.XC NH KHI LNG V THANH TON

46.1.XC NH KHI LNG

46.2.C S THANH TON

MC 06910 KHE CO GIN1. M T

Hng mc ny bao gm cc cng vic cung cp v lp t khe co, khe gin c sn xut trong cng xng cho mt cu. Cng tc bao gm c cung cp, lp t vt t, ph kin i km v cc chi tit cn thit to ra khe bin dng hon chnh.

2. H S TRNH NP

Nh thu phi trnh np cc bn v thi cng ca tt c cc loi khe bin dng d kin a vo s dng. Cc bn v thi cng bao gm biu th hin tng chuyn dch ca kt cu v rng yu cu ca khe ti cc thi im nhit khc nhau. Tt c cc chuyn v do co ngt, t bin, vng gia bn v cc d liu tng t khng nm trong biu ny nhng Nh thu phi xem xt v phi c T vn gim st xt duyt trc khi lp tm, iu chnh c nh hon chnh cui cng.

T vn gim st c th yu cu Nh thu cung cp cc chng ch ca Nh sn xut v ly bt k mu no tin hnh th cht lng vt liu theo quy nh k thut yu cu. Vic chp nhn s dng loi khe co gin trnh np phi c T vn gim st ph duyt bng vn bn.

3. CHP THUN VT LIU

Nh thu s khng c php vn chuyn, tp kt v a vo s dng hoc lp t bt k loi khe co gin, vt liu v ph kin khi cha c T vn gim st ph chun.

Vt liu s dng cho cc khe co gin dng rng lc phi c trnh cho T vn gim st chp thun chp thun v Ch u t ph duyt trc khi t hng.

4. VT LIU CO GIN

4.1. THP

Phn kt cu kim loi lm bng thp kt cu phi ph hp vi theo tiu chun AASHTO M 111. Cng ph hp vi tiu chun sau:

Thanh ray, hp : AASHTO M 270, Grade 36.

Thp tm: AASHTO M 270, Grade 36.

Thp trn: AASHTO M 270, Grade 36.

Thanh neo chng ct: AASHTO M 270, Grade 36.

ng hn: AASHTO/AWS D1.5.

Bu lng, cu v vng m: c m km theo tiu chun AASHTO M 232.

Bulng AASHTO M 164.

cu: AASHTO M 291.

Vng m: AASHTO M 293.

Du m, bi trn: tun theo ch dn ca Nh sn xut.

4.2. CAO SUPhn cao su s dng cho khe co gin rng lc phi l loi cao su c c bit loi EPDM vi cc tnh nng chnh nh bng di y, hoc tng ng.

Hng mc Vt liuTiu chunTnh cht c bn

Di cao su chng thmEPDMASTM D 2240

ASTM D 412

ASTM D 1149

ASTM D 573

ASTM D 412

ASTM D 2628-67T

- cng DIDC : 705

- Cng ko R: 7 MPa

- D dn diA%: 250% min

- Cng ko rch R: 25 daN/cm

- Lo ha: (168 h ti70C)

Thay i cng DIDC : 10 points

Thay i cng ko t R: 20%

Thay i dn di A% : -30%

- Chu Ozone:

(200 ppcm; 70 h at 40C;

dn di:20%)

Khng c vt nt- Nhit gy: -

50C

5. PHNG PHP THI CNG LP T

Nh thu phi c ch dn ca nh sn xut vt liu khe co gin v phi theo ng cc trnh t k thut quy nh vic lp t khe co gin. Bn v thi cng phi c trnh ln TVGS ph duyt. Tnh y ca vic thit k khe v chi tit lp t phi p ng theo ng ph chun v quyt nh cui cng ca TVGS cng nh TVTK. Nh thu phi c tr gip k thut ca i din ti hin trng ca nh sn xut trong sut qu trnh lp t cc khe ny. Phi c iu chnh thch hp theo nhit ti thi im lp t.

Ti v tr b tng s t khe co gin phi c v sinh sch bi, sch du v sch cc cht gy nhim, ng cao v trong tnh trng tt, b tng khng b bong hoc nt gy. Cc khe ny s khng c t khi T vn cha nghim thu v duyt iu kin hin ti.

Sau khi qut mt lp o nha kt dnh theo quy nh k thut, khe s c nh v bng bu lng neo v c cng trc vi lc cng tun theo quy nh ca nh cung cp

Ton b khe co gin gia cc b phn, xung quanh bu lng v cc l rng phi c hn kn ngn nc v chng n mn. B mt neoprene gn vi keo phi c nh sch ti nh my hoc phi c chi sch trc khi lp t sao cho keo dnh cht vo b mt.

Trc khi lp cc l rng ti bu lng, TVGS s nghim thu bu lng neo v phi vn cht vt theo ng quy nh k thut ca nh sn xut. Bt k mi hn no khng c TVGS ph chun s phi ty i v lm li, Nh thu phi chu mi chi ph.

Tt c cc mi ni hn chnh phi mn, nhn nhi, bu lng khng b tha ra ngoi hoc cc mi ni b nhm. Ton b keo dnh bm ra ngoi phi c ty sch hoc co sch trc khi kh.

Cc khe co gin cu phi c bo v trong sut qu trnh vn chuyn trnh b h hi v to ra ng sut v bin dng qu mc.

Cc khe co gin phi c lp t sao cho khng gy nn bt c ng lc khng cn thit, xon, bin dng hoc h hng.

Dung sai ca cc khe co gin trc khi lp t phi theo s liu c ch ra trong bng sau:

Hng mcDung sai

Chiu di+ 5mm

Chiu cao+ 2mm

B mt3mm

Mt ng khe rng lc2mm

Khong cch gia cc rng lc - Phng dc2mm

- Phng ngang0 ~ + 2mm

Cc khe co gin sau khi thi cng xong phi m bo khng cho php nc chy t mt cu xung pha di.

6. XC NH KHI LNG V THANH TON

n gi khe co gin bao gm vt liu, nhn cng, my v cc thit b, vt liu ph tin hnh cc cng vic theo yu cu hon chnh vic lp t v hon thin tt c cc hng mc khe co gin tng ng

Cc cng vic bao gm vn chuyn n v tr, lu kho, nh v, lp t bao gm trong hng mc thanh ton ny v khng c o c v chi tr ring.

Cc vt t vt liu ph kin nh va khng co ngt, thp lin kt khng c o c v chi tr ring.

Cc cng tc th nghim khe co gin bao gm trong hng mc thanh ton ny v khng c o c v chi tr ring

6.1. XC NH KHI LNG

Vic xc nh khi lng cc khe co gin phi o theo mt di ca vt liu c lp t v c T vn gim st chp thun, o dc theo ng tim ca cc khe (k c phn vt cho ln g lan can).

6.2. C S THANH TON

Cn c trn khi lng thc t thi cng c nghim thu. Khi lng ny phi ph hp vi khi lng trong Bn v thi cng c duyt & khi lng trong Tin lng mi thu. Thanh ton theo n gi trng thu c duyt v cn c vo Hp ng gia Ch u t vi Nh thu thi cng.Xy dng cc cu trn tuyn ng Ha Phc Ha KhngTrang 2 / 4