2023·1·BuildingConstruction200软土地区相邻基坑开挖时序对围护变形影响的数值分析马雪妍叶文启中天建设集团有限公司上海201102摘要：为解决相邻基坑开挖时序的问题，以上海某相邻基坑为例，对于施工的先后顺序进行分析论证，通过有限元模型试算4种工况下围护变形情况，经过工况间对比、与设计报警值对比之后得出最优工况，并将其作为实际工况与实际监测值对比。结果表明：基坑内侧围护结构受不同开挖工况的影响较大，外侧围护结构几乎不受影响，但外侧围护位移整体比内侧位移大；采用同步开挖时，内侧围护结构产生的位移最小。模拟结果与实际监测数据结果呈现一致性，验证了模拟的可行性，可为类似项目提供参考。关键词：相邻基坑；开挖时序；数值模拟；围护变形中图分类号：TU753文献标志码：A文章编号：1004-1001(2023)01-0200-06DOI：10.14144/j.cnki.jzsg.2023.01.051NumericalAnalysisofInfluenceofExcavationSequenceofAdjacentFoundationPitonDeformationofRetainingSupportinSoftSoilAreaMAXueyanYEWenqiZhongtianConstructionGroupCo.,Ltd.,Shanghai201102,ChinaAbstract:Inordertosolvetheproblemoftheexcavationsequenceofadjacentfoundationpits,takinganadjacentfoundationpitinShanghaiasanexample,theconstructionsequenceisanalyzedanddemonstrated.Thedeformationoftheretainingsupportunderfourworkingconditionsiscalculatedthroughthefiniteelementmodel.Afterthecomparisonbetweenworkingconditionsandthedesignalarmvalue,theoptimalworkingconditionisobtainedandcomparedwiththeactualmonitoringvalueastheactualworkingcondition.Theresultsshowthattheinnerretainingsupportstructureofthefoundationpitisgreatlyaffectedbydifferentexcavationconditions,andtheouterretainingsupportstructureisalmostunaffected,butthedisplacementoftheouterretainingsupportstructureislargerthanthatoftheinnerretainingsupportstructure.Whensynchronousexcavationisadopted,thedisplacementgeneratedbytheinnerretainingsupportstructureistheminimum.Thesimulationresultsareconsistentwiththeactualmonitoringdata,whichverifiesthefeasibilityofsimulationandcanprovidereferenceforsimilarprojects.Keywords:adjacentfoundationpit;excavationsequence;numericalsimulation;deformationofretainingsupport稳定性产生不利...
