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ID:37376744
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页数:4页
时间:2019-05-22
《郑州黄河公铁两用桥主河槽承台施工方案》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、4桥梁建设2010年第3期文章编号:1003—4722(2010)03-0004~04郑州黄河公铁两用桥主河槽承台施工方案吴向军(中铁大桥局集团第一工程有限公司,河南郑州450053)摘要:郑州黄河公铁两用桥主桥承台位于主河道内,通过对各桥墩承台所处环境及施工时间段的不同进行施工方案优化,确定靠近主河道的主桥1号墩承台采用插打钢板桩、人工辅助开挖、分层支护、局部深井降水、无需封底的施工方法;2,3,5号墩承台采用插打钢板桩围堰、空压机配合吸泥机清淤、灌注水下混凝土后抽水的施工方法;4号墩承台采用插打钢板桩围堰基坑内
2、抽水,底部干封混凝土的施工方法;6号墩承台采用在河道边筑岛、墩位外深井降水、基坑开挖的方式进行承台施工;其余0号墩、7~12号滩地墩承台采用常规的基坑开挖配合深井降水施工。顺利实现了该桥主河槽承台施工,取得了很好的综合效果。关键词:公路铁路两用桥;承台;钢板桩;围堰;施工方案中图分类号:U443.25文献标志码:AConstructionSchemesforPileCapsofZhengzhouHuangheRiverRail--cam。-RoadBridgeinMainRiverChannelW【,Xiang—j
3、un(The1stEngineeringCo.,Ltd.,ChinaRailwayMajorBridgeEngineeringGroup,Zhengzhou450053。China)Abstract:ThepilecapsofthemainbridgeofZhengzhouHuangheRiverRail—cum—RoadBridgearelocatedinthemainriverchanne1.Throughoptimizationoftheconstructionschemesforthepilecapsacc
4、ordingtothedifferentenvironmentandconstructiontimeschedules,itwasdeterminedthatthepilecapofpierNo.1closetothemainrivercoursewastobeconstructedbythemethodofinsertinganddrivingsteelsheetpiles,excavatingfoundationpitintheaidofmanu—alwork,laggingthepitlayerbylayer
5、,deep—welldewateringlocallyandnotsealingthebase.ThepilecapsofpiersNo.2,No.3andNo.5weretobeconstructedbyinsertinganddrivingsteelsheetpiles,airliftingandclearingoffmudbyaircompressorsandpumpingoutwateraftertremieconcretewascast.ThepilecapofpierNo.4wastobeconstru
6、ctedbyinsertinganddrivingsteelsheetpilesandpumpingoutwaterfromfoundationpitandsealingthebasewithconcreteindrycondition.ThepilecapofpierNo.6wastobeconstructedbybuildinganartificialislandatthesideoftherivercourse,deep—welldewateringoutsidethepierlocationandexcav
7、atingfoundationpitandthepilecapsoftherestoftheshoalpiersNo.0,No.7~12weretobeconstructedbytheroutinemethodofexcavatingfoundationpitsanddeep—welldewatering.Withthedifferentmeth—odsmentionedabove,theconstructionofthepilecapsofallpiersweresmoothlycompletedandveryg
8、oodcomprehensiveeffectwasachieved.Keywords:rail—cum—roadbridge;pilecap;steelsheetpile;cofferdam;constructionscheme收稿Et期:2010~01—25作者简介:吴向军(1967一),男,高级工程师,1988年毕业于长沙铁道学院铁道工程专业,I~:k(
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