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1、论文题目:大屯路公交与地铁换乘车站深基坑维护设计专业:土木工程(岩土工程)学生:(签名)指导老师:(签名)摘要根据《北京地铁奥运支线大屯路公交与地铁换乘站岩土工程勘查报告》,大屯路公交与地铁换乘车站长101.1m,基坑宽约26m,深约17m,同时参考当地的建筑经验和施工现场的具体情况,完成了大屯路公交与地铁换乘车站深基坑维护的方案论证和设计。降水方案为深井降水,支护方案采用土钉墙、排桩、内支撑联合支护。基坑开挖方式为分步、分段、分层开挖。在开挖的同时对基坑进行监测,监测的内容包括桩体变形、桩身内力、支撑轴力。得出结论:桩顶水平位移反映支护结构
2、的顶部变形情况,是支护结构安全状况的重要指标,且在有支撑作用的情况下支护变形最大。最后,根据施工方案对工程进行了施工组织设计。关键词:深基坑,支护方案,土钉墙,排桩,钢支撑,开挖方式,变形监测,施工组织类型:研究型84Subject:DeepfoundationpitretainingDesignofBeijingsubwaystationsandbustransferstationSpecialty:CivilEngineering(GeotechnicalEngineering)Name:(Signature)Instructor:(Si
3、gnature)ABSTRACTInthethesis,basedon《TheGeotecnicalEngineeringInvestigationReportOfBeijingsubwaystationsandbustransferstation》,thelengthofstationofBeijingsubwaystationsandbustransferstationis101.1m,thewidthoffoundationpitisabout26mandthedepthoffoundationpitisapproxomately17m
4、.Simultaneously,refertothelocalconstructionexperienceandspecialdetailsofconstractionsite,thatplantestifyanddesignofdeepfoundationpitretainingofBeijingsubwaystationsandbustransferstationhascompleted.Theplanofretainingadoptssoil-nailwall,line-pile,steelpropstoretaintogether.T
5、hetypeofexcavationadoptsawayfortheminutestep,thepartition,thelaminationexcavates.Whileexcavatingfoundationpit,foundationpitmonitoringiscarryingon,includingpiledeformation,pileinteralforce,inneraxialforce.Thestudyshowsthedeformationcharacteristicsofsupportingstructureisrelat
6、edtothehorizontaldisplacementoftheretainingpiletop,whichistheimportantcriterionofthesafetyofconditionofsupportingstructure.Withtheeffectofsupportingstructure,thedeformationisthelargest.Finally,accordingtoconstructionscheme,theconstructionorganizationdesignhasbeenfinished.Ke
7、yWords:deepfoundationpit;retainingplan;soil-nail;line-pile;steelprops;84excavationtype;deformation;monitoring;constructionorganizationType:Research84详细摘要本拟建工程设计说明书共分5章,包括:岩土工程勘察,基坑维护设计,基坑变形监测方案设计、施工组织设计等主要依据(1)《大屯路公交与地铁换乘车站岩土工程勘察报告》(2)《混凝土结构设计规范》(GBJ146-90)(3)《钢结构设计规范》(GB50
8、012-2003)(4)《建筑桩基技术规范》(JGJ94-94)(5)《建筑基坑支护技术规程》(JGJ120-1999)(6)《挤扩支盘灌注桩技术规程》(CECS1