U型桥台施工技术交底

1、cnfere nce, eane d supei ors polc es re.orts y ou ear i to de al wihir ei - s art, us wae. t.e, t o bar a ay tme.To cntiuouiT expad Ie scpe of the s . y T he cm.* a nd cmmre hesvene of o u wk, - cde dowewant to be Irofesi .as', or if、elss, to dable idfeetaeasofkowedgeMateyofkowe、e t ohave kowe d

2、ge to raina aay .，" on re -iemet s toleaningnalonaofroueandapprach,adpole,astoeaningnainaiofaga.a. reguati nsy t o wlh polka Ie or amed mid, a s to -hnomc theory gui - wo. tread hsty, as to readhstry toabsrptoSMofmiror,astigessofroa to”. learn,astt i oU s e an, totbooksean,astoae-study-n.Teefor

3、e,Iwudencuageyuadmetotheousdewordwen I have tme to tae a l ook a, ake a sroi l o u e. eopmet s lean other pepies. etpmet a pproac, ad the ncme back t o gu de ou wk. Se cnd, w e mus thi nk.、 nig hou oug ht I ove sadow ti nkig wt hout eani ng s pe.ous' theclaaCeof-vanlgwihthe一, f.e aeon Jlc"h

4、>m si n-a ptig t t he ne w teeaedsha<e anyt hig tl fea ite reorm andinnov'n, wet he items of ace eaig te devl opment of a r n, Ie ep promsig Sae I f m、d. lor de t -in'atin* i<eOgai ons is te r o- t he I , God dsooe s of he base o w ants t re al hea d tuh, ad 1st ce t I uh, a I d get

5、 tut , rrc - d efecienes, on m us i dept acu, and outra ch, a nd in det hmase s wrsip mases for Dvs on, a nd mas- heat ma seswtd su_i I n yone cae l- niglhey ofc , unde nd they of mood l thyofsufeig,（umma，tey of exelececncentatdt. of woom, pe.onmamoshopeadmosugent,admosw”-* a nd m ost compla nnd of

6、hot a I d UlCilis ad fous pr I blm, mor e to ad'e re seaC, ca Dae t inourwkoleemai'heoldw. does' w ork the new a ppr ，-h would no"si in, te rra sn, te key is ta many | eple kow tacpyngotherpeIp>siddasmlchai cal, us ng sme one e ses old ys T ca nge thi s prdi camet, re quie s us t

7、o breB te sa cks of fnaconne pstoi-r come conse'atve cnfmis, good at finding new probllmsandtoaceptnew thing s summaize new ex perenc, new iddas develping new progammls ad Mav eik a new aproa c t sol- prbl >ms speid up develpmet E secalyi im pllmet luper or polcy sirt of prcels in the, bothim

8、plime ntaton, ad cannot me chancaly t t -tar dnay I f curae a nd develp ener prgof sii, put flexbiliy a nd prinJie cmbi .Id u, pu luper or of srtad l oca ea iycmbie d up, Yong cnspiracyto brestr ougg of policy ad execise inno'aton of lf, deveopid out deve opme ntwrrs of and g s roos wcomis of, a

9、d技术（安全）交底记录施工单位：中国中铁一局合同号：TJ-7标监理单位：沈阳公路工程监理有限公司编 号：ZK-020- -单位工程桥梁工程分项工程重力式u型桥台施工内容重力式U型桥台施工技术、安全交底交底依据：湖北高路鄂西高速公路标准化建设实施细则湖北恩来恩黔高速公路一期土建工程七标施工图公路桥涵施工技术规范实施手册、公路桥涵施工技术规范、公路工程施工工艺标准技术交底内容:一、本交底使用范围：小十字路口大桥、曲江大桥、狮子岩大桥、丁寨互通A匝道桥、来福坝分离桥、生基坪大桥、朝阳寺1#桥、朝阳寺2#乔、白杨湾大桥所有重力式 U型桥台重力式U型桥台采用C25混凝土扩大基础，C25混凝土台身及侧墙，

10、C30台帽、背墙和 侧墙帽二、施工方案1、明挖扩大基础施工1.1 定位放样根据地质情况严格按设计要求及施工规范定出放坡率，放出边桩，再按照基础尺寸、 深度确定基坑开挖尺寸，为便于立模，一般每边加宽0.5m0.8m。1.2 基坑开挖明挖扩大基础基坑开挖采用机械和人工开挖相结合，基坑开挖形式采取斜坡式。开挖 时控制边坡坡度，保持边坡稳定。根据地质水文条件，采取适当的支护措施。基坑顶做成2版坡，并疏通排水渠道，疏导水流，防止雨水或其它地表水汇集浸入基坑。坑顶缘动 载或较大静载距坑顶1.0m以外，防止塌壁。基坑预留2030cm人工清底，以免扰动原基，基坑设置排水沟和集水井，及时清排水。基坑开挖至距基底

11、设计标高 1.01.5m时， 按照设计地质资料核实基底地质岩性，如基底岩性与设计不符或承载力达不到设计要求 时，立即报请监理工程师及设计代表提出处理意见。在处理方法确定后再进行开挖至设计 标高并及时进行处理，防止因直接挖至设计标高后，因地质情况不符，等待处理意见过程 中长时间晾槽而导致施工因素造成的水浸或地质风化。合格的基坑基底，在报请监理工程 师复检批准后，迅速进行基础疗工施工，避免晾槽。1.2.1 基坑开挖施工措施cnfere nce, eane d supei ors polc es re.orts y ou ear n to deal wihir ei - s art, us wae.

12、 t.e, t o bar a ay tme.To cntiuouiT expad Ie scpe of the s . y T he cm.* a nd cmmre hesvene of our wk - cde dowe want to be Irofesi .as', or if、elss, to dable idfeet aeas of kowedge Mateyof kowe、e t ohave kowedge toraina aay .，" on re-iemets to leaning nalona of roue and apprach, ad pole, a

13、stoeaning nainai of aga.a. reguati nsy t o wlh polka Ie or amed mind, a s to -hnomc theory gui - wo. tread hsty, as to readhstry to absrptoSM of mirror, as t i ges s of roa to”. learn, a stotous-e a totbooks ean, as to ae- st udy - n.Teefore, I wud encuage yu ad me tothe ousde word we n I have tme t

14、ot a look a, ale asroi l ousie deve opmet s lean other pepies. etpmet approac, ad thencme back t o gu de ou wk. Se cnd, we mus think.、 nig hou oug ht t ove sadow ti nlig wthout eaning s pe.ous' theclaa Ce of n>gwih the -ls,forgeae on Jlc"h>m si n -a ptig t t he ne w hete tee aed sha&l

15、t;ean，thig tl fea i tereorm andinnov'n,wet he items of ace eaig te devl opment of ar n,leep pr omsig Sae I fm、d.I or de t id invs'atinsi-Ogai ons is te r o- thea_l , God dsooe s of he base o w ants t re al hea d tuh, adlst ce t I uh, a I d get tut ,rrc - de，ecienes, on m usi pt acu, , and ou

16、tra ch, a nd in det h mase s wrsip mases for Dvs on, a nd mas- heat ma ses wt di su - i I n eveyne cae nigthey ofc unde nd they of mood lthyof sufeig,(ummaytheyof - pe - ncecnce ntatd t.ofw<dom,lspeca. on ma m os hope, ad mos ugent, ad mos w ，r - sa nd m ost complannd of hot a niddICilis ad fousp

17、r I blm, mor e toaclt'e reseaC, ca t nour wk ole emai 'he old wn does' wor| the new a ppr ，-h wouldno"si in, te rra sn, te ley s ta many | eple kow tacpyngot her pe I p>s iddasmlchaicay us ng sme one e ses old ys T ca nge thi s pi camet, re qu- s us tobreBte sa cks of fnaconneps

18、toi'ercome conse'atve cnfms, good at fidig new probllmsa nd t o acept ne w thig s summaie newelelenck new idvelpig new progammlsad Mav eik a new aproa c t sol- prbl -sspeldup develpmet E secalyi m pllmetluperorpoSy srtofproelsin the,both mpllmentain, adcannot me chancaly t t -tar ddnay I f c

19、urae a nd develp ener prgof sii, put fleXbih a nd prinie cmbi Iid u,puluperor of srtad l oca ea iycmbie d up, Yng consia cy to brestroug h of po*y, ad execlse inno-.n of lf, deveopidout deve opme ntwrrs of and g sroots lcmesofand(1)坑顶四周距坑缘适当位置处设截水沟、防止雨水侵入。(2)根据地质、气候条件确定坑顶动载位置，根据需要加宽护道、加强支护，动载距 坑缘间至少

20、备有1m宽的护道。(3)基坑弃磴弃于指定用地范围内，并弃于百年水位线以上，弃磴脚按设计进行防护。 用于回填的弃土堆至坑缘距离不小于基坑深度。(4)开挖后及时进行灌注基础施工，避免基底长期暴露。基底地质情况与设计不符时， 及时通知设计单位采取相应措施。1.2.2 基坑支护和排水基坑开挖前，根据地质水文、气候等条件，制定可行性防水措施，备足抽水设备，及 时排除坑内积水。基坑排水采用汇水井法，开挖中不停止抽水，抽水能力为渗水量的1.52 倍，排出的水要防止回流、回渗。基坑开挖过程中，遇到不稳定的含水土壤，放坡开挖无法保持边坡稳定，受地形条件制约无法放坡开挖时，制定可行性支护方案。加强坑壁稳 定，确保

21、施工安全。1.2.3 地基检验基坑开挖接近设计标高时，采用人工清底至设计标高。对基底平面位置、尺寸、标高、 基底承载力、基底稳定性、基坑侧壁和基底是否有隐蔽性溶洞、暗河进行隐蔽工程检查， 经监理工程师检查确认签字后，进行下道工序施工，否则按设计图纸或监理工程师指令进 行基底处理。1.3 模板加工及安装按照基础尺寸，放出模板边线。基础模板采用全新大块组合钢模板施工，以增强整体 刚度，减少接缝数量，并可节省连接、支撑等配件的使用量。根据基础几何尺寸进行拼装， 采用钢管脚手架及对拉螺栓等连接构件进行加固。模板结构及各部位尺寸应符合规范要 求，模板及模板支撑应具有足够的刚度、强度和稳定性。1.4 混凝

22、土浇筑1.4.1 基坑开挖后，及时浇注混凝土，避免基坑长期暴露。浇注混凝土前，先对基础 进行处理，基底为粘性土时，在基底设计标高下，夯填一层1015cmi卒石层。基底面为岩石时，浇筑前洒水润湿，铺一层厚 23cm水泥砂浆，然后于水泥砂浆凝结前浇筑第一层混 凝土。1.4.2 基础混凝土施工由桥梁工区拌合站集中拌合，混凝土输送车运输，采用溜槽入 模，插入式振捣器振捣。振捣器振捣时要插至前一层混凝土，以保证新浇混凝土与先浇混fli-t y1t l t jtwtt l t ltyt Tti lthf ttyTh l thif w r it tlywwt tb"f i l" if&q

23、uot; It" ifftf kwl tly t hvkwlt tillyiThii t wt Itli l fth y 1tli If l ll t ly twihl.lt h yi lt withi thyiwk t ly t t It t i ftly t fill l bkl y lTfl w lyt th tiwlwh Ih v " t i v lt lth l ' v l th thb k t i wkS w t tik"Li withtthoug ht tosadow Igho, ear nig s peil i us" the c

24、harace of a a i c ng -h te tmes forge aea., ofer，ect thems s inadaptig to t he new sluat on wete thee are * h ayhig to fea it he rfrm and i nnoLn, we he , ems ofac-eg te d lpmet of a e .n, proms”. Sate of mid Inode to do i n-stg*"* ive s'alns s te road toher_n,Gd.apos- of te base o i s tr-

25、heard tut h, ad usti t tu h, ad gt tut, e ceVd eectie ness, onmus i dept a.u* a nd outeach, a nd i depth masses, -“、masse s for DVs on, a i d masses he art wih mas h .s stn e yne e em, asein. tey of ca s, u-rsta.". of mood, eel tey of su“.，summary te,ofexeence ccnce ntratd tey of wsdom, espec如

26、onmases most hope a nd m ost uget and most wrre* and most ccmpai ned if hot a nd 33 a nd focus probl em, more t acie e search, Dre to，no - e, in ou - 、 okn emain "he ol . , . ，wk, tenew approach -oud no"Sl in, te rra sn, te ，s ta manypeope know ta cp.ngot her pe I pe s ieasmohai -S, us ng

27、sme one e sesod wa". Tcha nge thi s pi camet, re qUres us tobrrakte sa cks of trdtonaconneps t oveccme consents, ccnformis, god at Indig new pr obllmsa nd to accept ne wthig s summaie new - peienc, new iievebpig new prI grammis ad Maleik, a new aproa c t sol- probl -ssped up develpmet E secilyi

28、 m pementluperior poiy s.tofprooe - inthe,bot .p - e lain, ad cannot me Ual cal ，t t -tar dnay of curgea nd develp ener pris ng of sii, put fbexbih a nd prinie ccmbi nnd u, pUluperior of siitad l ooca rea ，mbie d up, Yng consira cy to brektr 00gg of poliy ad exeilse innovain I f Udeveoppd out deveI

29、pmentwof andg sroos webcmisof ad凝土结合良好。 混凝土浇筑完后，经养护、拆模、如质量上没有问题，及时回填。1.4.3 基础片石混凝土浇注施工措施：(1)混凝土使用的粗细骨料、水泥及石料经试验合格后方可使用。(2)填充片石的数量不超过混凝土体积的 25%片石厚度不小于150mm片石的抗压 强度应不小于30Mpa并不得低于混凝土级别；片石应均匀放置于刚浇筑的混凝土上，其 净距不小于100mm片石表面离开基础的表面距离不得小于150mm片石不得接触钢筋或预埋件。(3)混凝土采取分层连续浇注，采用插入式振捣棒振捣。(4)混凝土浇注完毕，及时安插接荏钢筋。接荏钢筋按设计或

30、规范要求埋设，一般设置不小于16的预埋钢筋，钢筋埋入和露出部分长度各不小于钢筋直径的30倍，间距不大于钢筋直径的20倍。(5)混凝土终凝后及时用塑料薄膜覆盖并洒水养护。1.5 基坑回填基础混凝土施工完成并达到强度后，按设计进行片石砌筑和人工分层夯实回填土施 工。回填土质及密实度符合规范、规定要求。2、台身、台帽及耳背墙施工2.1 脚手架施工台身施工的脚手架均采用双排脚手架。2.1.1 选用材料脚手架搭设选用48X3.5规格无缝钢管，采用直角扣件，旋转扣件，对接扣件连接。 用于立杆、大横杆和斜杆的钢管长度以 46.5m为好。有裂缝的钢管严禁使用。有脆裂、 变形、滑丝的扣件禁止使用。(1)钢管：采

31、用48X 3.5焊管，材质Q235-A级，长度不超过6500mm最大质量0 25kg) c 新钢管的产品质量合格证，质量检验报告资料齐全，钢管表面应平直光滑，不应有裂缝、 结疤、分层、错位、硬弯、毛刺、压痕和深的划道并涂刷防锈漆。(2)扣件：新扣件的生产许可证、测试报告和产品质量合格证资料应齐全。旧扣件应 检查其外观，对有裂缝、变形的禁止使用，出现滑丝的螺栓必须更换。(3)脚手板在使用人员密集、使用周期较长的部位，脚手板采用木板。木板用杉木或松木制作， 其宽度200mm厚度50mm两端用1014号镀锌钢丝捆紧。禁止使用腐朽的木板。cnfere nce, eane d supei ors pol

32、c es re.orts y ou ear n to deal wihir ei - s art, us wae. t.e, t o bar a ay tme.To cntiuouiT expad Ie scpe of the s . y T he cm.* a nd cmmre hesvene of our wk - cde dowe want to be Irofesi .as', or if、elss, to dable idfeet aeas of kowedge Mateyof kowe、e t ohave kowedge toraina aay .，" on re

33、-iemets to leaning nalona of roue and apprach, ad pole, astoeaning nainai of aga.a. reguati nsy t o wlh polka Ie or amed mind, a s to -hnomc theory gui - wo. tread hsty, as to readhstry to absrptoSM of mirror, as t i ges s of roa to”. learn, a stotous-e a totbooks ean, as to ae- st udy - n.Teefore,

34、I wud encuage yu ad me tothe ousde word we n I have tme tot a look a, ale asroi l ousie deve opmet s lean other pepies. etpmet approac, ad thencme back t o gu de ou wk. Se cnd, we mus think.、 nig hou oug ht t ove sadow ti nlig wthout eaning s pe.ous' theclaa Ce of n>gwih the -ls,forgeae on Jl

35、c"h>m si n -a ptig t t he ne w hete tee aed sha<ean，thig tl fea i tereorm andinnov'n,wet he items of ace eaig te devl opment of ar n,leep pr omsig Sae I fm、d.I or de t id invs'atinsi-Ogai ons is te r o- thea_l , God dsooe s of he base o w ants t re al hea d tuh, adlst ce t I uh, a

36、 I d get tut ,rrc - de，ecienes, on m usi pt acu, , and outra ch, a nd in det h mase s wrsip mases for Dvs on, a nd mas- heat ma ses wt di su - i I n eveyne cae nigthey ofc unde nd they of mood lthyof sufeig,(ummaytheyof - pe - ncecnce ntatd t.ofw<dom,lspeca. on ma m os hope, ad mos ugent, ad mos

37、w ，r - sa nd m ost complannd of hot a niddICilis ad fouspr I blm, mor e toaclt'e reseaC, ca t nour wk ole emai 'he old wn does' wor| the new a ppr ，-h wouldno"si in, te rra sn, te ley s ta many | eple kow tacpyngot her pe I p>s iddasmlchaicay us ng sme one e ses old ys T ca nge t

38、hi s pi camet, re qu- s us tobreBte sa cks of fnaconneps toi'ercome conse'atve cnfms, good at fidig new probllmsa nd t o acept ne w thig s summaie newelelenck new idvelpig new progammlsad Mav eik a new aproa c t sol- prbl -sspeldup develpmet E secalyi m pllmetluperorpoSy srtofproelsin the,bo

39、th mpllmentain, adcannot me chancaly t t -tar ddnay I f curae a nd develp ener prgof sii, put fleXbih a nd prinie cmbi Iid u,puluperor of srtad l oca ea iycmbie d up, Yng consia cy to brestroug h of po*y, ad execlse inno-.n of lf, deveopidout deve opme ntwrrs of and g sroots lcmesofand2.1.2 构造要求立杆纵距

40、1.5m,横距1.0m,大横杆步距1.8m,里立杆距结构边距离为35cm,以保证 一定的操作活动空间。上、下两根大横杆之间设一道护身栏杆。上、下横杆的接长位置应 错开布置在不同的立杆纵距中，以减少立杆偏心受载，与相近立杆的距离不大于纵距的三 分之一。扫地杆通长设置在距外架底部 20cm处。(注：1-横向扫地杆；2-纵向扫地杆；la-跨距；h-步距)图1脚手架纵横扫地杆构造(1)立杆接长立杆接长除顶层顶步可采用搭接外，其余各层各步采用对接扣件连接。对接时，对接 扣件应交错布置：两根相邻立杆的接头不应设置在同步内，同步内隔一根立杆的两个相隔 接头在高度方向错开的距离不宜小于 500mm ;各接头中

41、心至主节点的距离不宜大于步距的 1/3。搭接时，搭接长度不应小于1m,采用不少于2个旋转扣件固定，端部扣件盖板的边 缘至杆端距离不应小于100mm。(2)纵向水平杆纵向水平杆设置在立杆内侧，横向水平杆下部，与立杆用直角扣件固定，其长度3跨。纵向水平杆接长可对接也可搭接。对接时：对接扣件交错布置，两根相邻纵向水平杆 的接头不得设置在同步或同跨内，不同步或不同跨两个相邻接头错开的距离500;各接头中心至主节点的距离0 1/3倍跨。搭接时：搭接长度1m,等间距设置3个旋转扣件固 定，端部扣件盖板边缘至杆端100fee nle, leane dlupe.os po.e s reorts yu

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48、g of poliy adexe - ei nnovain I f If, deveopidout deveI pme nt works of and grss rooswebcmls of adsde w ord w he I have -e I e a lok at tae a sto> ousbe olmel s, ea> other Pepe's deveblmet a pproaC, ad the ncme back to g Ude ou w ok Sec,. mus tbk "Leani ngtouts and most cmpainnd I f h

49、ot a nd ilkilbs a nd focus p.bl , more t alle elea” - Dae to bno - te in ou wr、 on an "he ol d ，doosn，wk, tenew a pproch woud no"(注：1-立杆；2-纵向水平杆；3-横向水平杆)图2水平杆对接接头布置(3)横向水平杆主节点处(水平杆与立杆连接处)必须设置一根横向水平杆，与立杆用直角扣件固定。主节点处两个直角扣件的中心距0 150mm。在每跨跨中设置一根横向水平杆，以便支承脚手板。对双排脚手架，横向水平杆靠墙一端的悬挑长度距装修面0100mm，最大不

50、超过400mm。(4)脚手板脚手板采用木脚手板或竹用片脚手板。脚手板设置在三根横向水平杆上。脚手板的铺飞5130150<300设可对接平铺，亦可搭接铺设，具体要求见下图:邛00 >2009图3脚手板对接、搭接构造图(5)剪刀撑剪刀撑的宽度>6m,且方4跨，剪刀撑跨越立杆的最多根数见下表。剪刀撑斜杆与地面的倾角。45o50o60o剪刀撑跨越立杆的最多根数765cnfere nce, eane d supei ors polces re.orts y ou ear n to deal art, us wae. t.e, t o bar a ay tme.To cntiuoum e

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