河流水位对深浅式地铁基坑变形和受力的影响

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MENG Yingjie1，WANG Weijun1，LI Meng1，HU Tianlong1，LONG Dayu2 （1. Beijing Municipal Road Bridge Holding Group Co.，Ltd.，Beijing 1OOO68，China；

School of Civil and Resource Engineering，University of Science and Technology Beijing，Beijing 10o083，China

Abstract：Thepaperaims tostudytheinfluenceofriver waterlevelondeepandshalowsubwayfoundationpitengineering.ThefluidsolidcouplingcalculationmodelinRS3finiteelementsoftwarewasusedtostudytheinfluenceofriverwaterlevelchangeonthe deformationandstressofdepandshalowsubwayfoundationpit.Theresultsshowthatthehorizontaldisplacementandbendingoentof thediaphragall，uplifsplacentofpitottndrtcalisplacmentoftlieualliceaseithasfr waterlevel.Tegroundsufaceselementdisplacementandthabiltysafetyfactoroffoundationpitdecreasewitteinceaseofiver waterlevel.Tevaratiofrverwaterlevelsitleectonvertcaldisplacmentoflatcecolus.Whenthlevatiooferter level is in the range of 21～22m ，it hasgreat influence on the horizontal displacement and bending moment of the diaphragm wall， groundsurfaceselementdisplacement，theupliftdisplacementofpitbotomandtestabitysafetyfactoroffoundationpitWiththe increaseofriveraterlevel，theiuencerangeofgrondsurfaceselementdisplacementanduplfdisplacementofpitbotoeandto thesoilatthebotomoftepitandteriveride，andtheplasticfailureareaatteshalowpartofthfoundationpitandtebottomof the retaining pile will also increase.

Keywords：riversideconditions；deepandshalowsubwayfoundationpit；stageofriver；finiteelementanalysis；fluidsolidcoupling

0 引言

地铁基坑工程已经成为我国城市地下空间发展的必要手段，而基坑开挖施工可能遇到临近江河与海洋、城市建筑物和综合地下管线等复杂环境[1-2]。（剩余6468字）