江苏建筑圆园23年第3期渊总第228期冤地铁车站深基坑伺服支撑体系数值分析与监测周游1袁唐铮铮2袁孙小莉2袁刘鹏飞1袁蒋刚2渊1上海隧道工程有限公司袁上海200032曰2南京工业大学交通运输工程学院袁江苏南京210009)[摘要]地铁车站深基坑往往采用多层尧非对称布置的复合支撑体系遥为深入探究车站深基坑开挖过程中围护结构及周边土体的变形机理袁根据南京三山街地铁站深基坑支护方案袁利用ABAQUS软件对基坑开挖-支撑全过程进行三维数值模拟遥计算各步土方开挖造成的围护结构侧移尧周边地表沉降及伺服钢支撑轴力袁并与施工监测数据进行对比遥结果表明院计算围护结构最大侧移量约55mm袁数值大小和分布情况均与监测数据吻合袁该侧移量接近规范中的支护结构侧移报警值袁是基坑支护方案的主要控制因素曰地表沉降计算值最大约为20mm袁分布情况与实测沉降相同袁绝对数值小于实测沉降袁可能与建模时未考虑周边环境荷载有关曰数值计算得到的钢支撑轴力小于实测值袁且两者均显著小于钢支撑容许轴力遥[关键词]地铁车站曰深基坑曰变形控制曰三维数值模拟曰伺服支撑[中图分类号]TU473.2[文献标志码]A[文章编号]1005-6270渊20圆3冤03-0105-05NumericalAnalysisandMonitoringofServoSupportSysteminDeepFoundationPitofMetroStationZHOUYou1TANGZhengzheng2SUNXiaoli2LIUPengfei1JIANGGang2渊1.ShanghaiTunnelEngineeringCo.,Ltd,Shanghai200032China曰2.CollegeofTransportationScienceandEngineering,NanjingTechUniversity,NanjingJiangsu210009China冤Abstract院Thedeepfoundationpitofsubwaystationusuallyadoptsmulti-layerandasymmetricalcompositesupportsystem.Inordertofurtherexplorethedeformationmechanismoftheretainingstructureandsurroundingsoilduringtheexcavationofdeepfoundationpitofthestation,accordingtothedeepfoundationpitsupportingschemeofNanjingSanshanStreetsubwaystation,ABAQUSsoftwarewasusedtoconductthree-dimensionalnumericalsimulationofthewholeprocessofexcavationandsupportoffoundationpit.Thelateralmovementoftheretainingstructure,thesettlementofthesurroundingsurface,andtheaxialforceoftheservosteelsupportcausedbyeachearthworkexcavationwerecalculatedandcomparedwiththeconstructionmonitoringdata.Theresultsshowthatthecalculatedmaximumlateraldisplacementoftheretainingstructureisabout55mm,andtheval...
