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1、某系桿拱橋施工工藝 一、工程概況 中孔剛性系桿拱計算跨徑L=42m，矢高f=7.0m，跨比D=1/6，拱軸線為二次拋物線型。系梁采用工字型截面，高1.4m,翼寬0.8m，翼厚0.25，肋厚0.3，在與吊桿處漸變?yōu)閷?.8m，高1.4的矩形截面，至拱腳段漸變?yōu)楦?.95的矩形截面；拱肋采用工字型截面，高1.3m，翼寬0.8m，翼厚0.25，肋厚0.4，在1/3跨處漸變?yōu)閷?.8m，高1.3的矩形截面；吊桿采用48φs5高強碳素鋼絲，吊桿間距4.2m，全橋計2×9根吊桿，采用直徑為245mm圓形截面，對應(yīng)吊桿處設(shè)置橫梁，行車道板擱置在橫梁上?！ 《?、中孔主要
2、施工步驟及主要技術(shù)措施 ?、濉⑹┐蛑Ъ軜痘?，搭設(shè)系梁和橫梁支架，預(yù)留通航孔，綁扎系梁、拱腳和端橫梁鋼筋，立模澆筑系梁、拱腳和端橫梁砼?！ ?、支架基礎(chǔ)處理： a、系桿支架基礎(chǔ)： 中孔橋跨位于水中，分三跨布置，中跨的支墩下采用6根15m長φ273鋼管樁,壁厚7mm，搭設(shè)的臨時承臺，鋼管樁的入土深度根據(jù)計算確定，承載力可根據(jù)貫入度進行雙控，承臺采用鋼結(jié)構(gòu)承臺，上面用一組雙層三排貝雷作支墩，支墩上安放砂筒；兩邊跨采用長10m的圓木樁，木樁上擱置18cm*20cm的木枋。 b、橫梁支架基礎(chǔ)： 對于中跨橫梁下，在系桿的臨時支架內(nèi)插6根φ273的鋼管樁，樁頂鋼
3、結(jié)構(gòu)布置形式同系桿支架；邊跨橫梁下采用6根長10m的圓木樁。obstacles,correctingmisunderstandings,advocategoodcadrestyle.2,adheretothescientificdecision-makinganddemocraticdecision-makingdecision-makinglaw.Correctlyhandletoensurethatgovernmentdecreesandbasedontheactualcreativework,givingfullplaytosubjectiveini
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5、ndlegalreviewmechanism.3,topromoteteamunity.Upholdandimprovethesystemofannualpartybooktalkhearttoheart,mindandPartymembers,Partymemberstoexchangeeachothernotlessthan2times.Theimplementationofsoundteamdemocraticlifesystem,consolidateandenhancetheparty'smasslineeducationalpracticewi
6、llpromotetheachievementofthetopicofdemocraticlife,criticismandself-criticismnormalization,along-term.Adheretothepartyonthebasisoftheprincipleofunity,enhanceinternalcommunication,strengtheninternalsupervision,selfSleepmaintenanceteamcollectiveimageandauthority.(three)toensuretheexe
7、cutionisnotstrongordisguisedtoresistgovernmentdecreesissues.IndividualBureauleadershipteammemberslackoflearningpoliticaltheorysystem,notfromtheobjectivereality,notwiththeparty'sinterestsabovealltheprinciplestodealwithpersonalproblems.Inthespecificworksafetysupervisionintheexecutio
8、nisnotstrong,intheimplementationo
