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ID:34601486
大小:2.15 MB
页数:51页
时间:2019-03-08
《忠县长江大桥10%23桥墩深水基础钢围堰施工技术》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、重庆大学硕士学位论文中文摘要摘要在桥梁建设快速发展的同时,桥墩深水基础施工技术也得到了迅速提高和发展。桥梁跨度的设计越来越大,桥墩基础也逐步适用于更深的水域,施工难度加大,施工技术也越来越高,实现了跨越式发展。在桥梁的深水基础施工过程中所采用的围护结构,也从原来的土石围堰、木竹围堰围护结构发展到钢板桩围堰、钢筋混凝土板桩围堰,以及现在的更能适用于深水墩位施工的双壁钢围堰围护结构体系。在大型桥梁深水基础施工中,双壁钢围堰是近年来发展起来的用于大型深水基础工程施工的理想结构物,它不仅起到深水基础工程在施工过程中的围水作用,也可以作为钻孔桩的施工平台,还能保证基础工程
2、在整个洪水期也可以继续施工。在特定条件下,特别是对于水深较深、河床覆盖层很薄或基本无覆盖层的坚硬岩层地质情况,具有其它结构无法比拟的优势。本文以一桥梁工程10#主墩围堰施工为工程背景较为系统地总结了深水基础双壁钢围堰施工的优点及特点,详细地介绍了从方案的比选到锚锭系统的设计,从导向船的就位到首节钢围堰的下放,从钻孔平台的搭建到承台的浇筑等重要工序,总结了现场经验,为同类型桥梁基础的建设提供了一定实践经验。关键词:深水基础,钢围堰,施工,技术。重庆大学硕士学位论文英文摘要ABSTRACTWithrapiddevelopmentofbridgeconstructio
3、n,thebuttressdeepwaterfoundationconstructiontechnologyhasgotrapidimprovementanddevelopment。Thedesignedbridgespanisbiggerandbigger,buttressfoundationisgraduallyappliedtothedeeperwater,theconstructiondifficultyisincreasing,andtheconstructiontechnologyisimproved,SOtheleapingdevelopmenti
4、saccomplished.Themaintenancestructureadoptedindeepwaterfoundationconstructionprocessofthebridge,developsfromoriginalearth-rockcofferdam,wood—bamboocofferdamtosteelsheetpilecofferdam,reinforcedconcretesheetpilecofferdam,anddoublelayerssteelcofferdammaintenancestructuresystemcurrentlyw
5、hichismoreapplicabletode印waterbuttressconstruction.Duringthelargebridgedeepwaterfoundationconstruction,doublelayerssteelcofferdamdevelopinginrecentyearsisaidealstructure,whichcouldbenotonlyusedinthedeepwaterfoundationconstructiontoresistwaterintheprocessofconstruction,butalsocouldbeu
6、sedasconstructionplatformofdrillingpile,anditalsoensurecontinuingtheconstruCtionoffoundationprojectduringthewholefloodperiod.Underparticularcondition,especiallyundertheconditionofhardrockbedwhichhasmuchdeeperwaterlevel,thinnerriverbedCOVerorevenintectate,doublelayerssteelcofferdamhas
7、imcomparableadvantagesthanotherstructures.Thispaper,takingtheconstructionofNo.10piercofferdaminabridgeengineeringasaexample,systematicallysummarizedtheadvantagesandcharacteristicsoftheconstructionofdouble-wallsteelcofferdaminthede印waterfoundationandgaveadetaileddescriptionabouttheimp
8、ortantworkpr
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