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河流水位對深淺式地鐵基坑變形和受力的影響

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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

地鐵基坑工程已經(jīng)成為我國城市地下空間發(fā)展的必要手段,而基坑開挖施工可能遇到臨近江河與海洋、城市建筑物和綜合地下管線等復(fù)雜環(huán)境[1-2]。(剩余6468字)

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