地铁隧道洞桩法施工对邻近桥基影响的时间效应分析

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1、北京交通大学硕士学位论文地铁隧道洞桩法施工对邻近桥基影响的时间效应分析姓名：李业龙申请学位级别：硕士专业：岩土工程指导教师：曾巧玲20061201AB趼RAI?●’Withthedevelopmentofnationaleconomicandurbanization,theconstructionofsubwayisdevelopedcosmically．However,sometimesthesubwayconstructionsalerestrictedduetothelimitationoflineandspace．Therebyquantitiesofspccialeng

2、ineeringproblemsmayappearinpractice．1kproblemofshallowexcavationtraversingthefoundationsofsuperstructureisoneofthetypicalinstances．TheGuomaostationofneijingsubwayNo．10linetraversesseveralbridgepilefoundations．Theexcavationcancausegroundsettlementandvariationofstresses，whichwillhurttheregulars

3、erviceoftheexistingbridgeintheaspectssuchaspilefoundationsettlement,superstructuredeformation,etc．Oversizedeformationcanendangerthenormalfunctionofthestructures．Abundancedataderivedfrompracticalsupervisionsandmeasuresshowthat,thereisobvioustimeeffectonthesurroundingground,structureandestablis

4、hmentsinexcavationduetotherheologicalpropertyofrock．Asaresult，thetheologicalcharacteristicsandtimeeffectshouldbeconsidered．+Aimattheseproblems,relativeresearchesareconductedasfollowing：1)CreeptestsareconductedOnthesoiloftypicalgroundaroundGuomaosubwaystationtoanalyzetherhea>logicalandstrength

5、characteristics．∞ThetestdataarefittedusingtheGeneralizedKelvinModel,Power-functionModel,andBurgersModel．Bycomparingthefittingresultswiththetestsdata,aproperconstitutivemodelisadoptedfornumericalsimulation，modelparametersalegivenaswell．3)UsingtheKelvinviscoplasticityModel，aTunnel-abutment-soil

6、numericalmodeliscreatedtostudythetimeeffectofmetrotunnelingwithdrift-pilemethodOnadjacentbridgepiles．Thecalculationresultisapproximatetotheactualmeasurement．4、SomeadviceOUthebridgepilesdeformationcontrolisproposedforG1／omaostation．KEYWORDS：rhoelogicalcharacteristics；timeeffect；constitutivemod

7、el；drift-pilemethod；adjacentbridgepilesCL辐SNol学位论文版权使用授权书本学位论文作者完全了解北京交通大学有关保留、使用学位论文的规定。特授权北京交通大学可以将学位论文的全都或部分内容编入有关数据库进行检索，并采用影印、缩印或扫描等复制手段保存、汇编以供查阅和借阅。同意学校向国家有关部门或机构送交论文的复印件和磁盘．(保密的学位论文在解密后适用本授权说明)学位论文作者签名．／多芝彩签字日期：刃矽厂年，)，月，7日导师签名：＼移；以签字日期