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时间:2019-05-15
《望东长江公路大桥钢围堰下水施工技术》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、桥梁建设2014年第44卷第6期(总第229期)1l2BridgeConstruction,Vo1.44,No.6,2014(TotallyNo.229)文章编号:1003—4722(2014)06—0112—05望东长江公路大桥钢围堰下水施工技术赵富立,魏超(中交路桥华南工程有限公司,广东中山528434)摘要:安徽省池州市望东长江公路大桥主桥为钢~混组合梁斜拉桥,跨径布置为(78+228+638+228+78)m,主梁采用PK型分离双箱形式,南岸桥塔墩采用高桩承台、钻孔灌注桩基础,基础采用高低刃脚异型双
2、壁钢围堰施工,钢围堰长50.4m、宽28.4m,重约1532t。根据该桥桥塔基础建设条件,钢围堰采用先无底围堰、后钻孔方案施工,采用气囊法下水。钢围堰在船厂分块加_T-制造,在船坞内采用卧式拼装成型,利用橡胶气囊法滑移下水,利用地锚和卷扬机滑轮组反拉牵引控制钢围堰滑移速度,借助拖轮将钢围堰浮运至桥位处,完成钢围堰下水施_12。关键词:斜拉桥;组合梁;钻孔灌注桩;钢围堰;气囊法下水;桥梁施工;施工技术中图分类号:U448.27;U445.55文献标志码:AConstructionTechniquesforLa
3、unchingofSteelCofferdamofWangdongChangjiangRiverHighwayBridgeZHAOFu-liWElChao(SouthChinaEngineeringCo.,Ltd.,Road&BridgeInternationalCo.,Ltd.,Zhongshan528434,China)Abstract:ThemainbridgeofWangdongChangjiangRiverHighwayBridgeinChizhouCity,AnhuiProvinceisaste
4、elandconcretecompositegirdercable—stayedbridgewithspanarrange—ment(78+228+638+228+78)mandthemaingirderisoftheseparateddoubleboxesofthePasco—KenneiwickBridgetype.Thefoundationforthesouthpylonpierofthebridgeistheoneofboredpile.~andelevatedpilecapandisconstru
5、ctedbytheirregulardouble—wallsteelcofferdamwithunequalheightcuttingedges.Thecofferdamis5O.4mlong,28.4mwideandweighsaboutl532t.Inaccordancewiththeconstructionconditionsofthefoundationforthepylonpier,theconstructionschemeadoptedforthefoundationwasthatthecoff
6、erdamwaslaunchedtotheriverbytheairbagmethod,thecofferdamwithnobottomwasarrangedatthepiersitefirstandtheboringinsidethecofferdamwascarriedoutthen.Thecofferdamwasfabricatedinblocksandassembledhorizontallyintheshipyardandwaslaunchedtotheriverbytherubberairbag
7、method.Inthelaunchingofthecofferdam,thelaunchingspeedofthecofferdamwascontrolled,usingthereversehaulingfromthegroundanchors,winchesandpulleyblocks.Thecofferdamwasfloatedtothepiersitebythetugboatsandatthisstage,theconstructionofthecofferdaminwaterwastobefin
8、allycompleted.Keywords:cable—stayedbridge;compositegirder;boredpile;steelcofferdam;airbagmeth—odlaunching;bridgeconstruction;constructiontechnique1工程概况主桥为组合梁斜拉桥,跨径布置为(78+228+638+安徽省池洲市望东长江公路大桥是国家高速公228+78)m,其
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