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本科学生毕业设计科技大厦基坑支护结构设计院部名称：土木与建筑工程学院专业班级：学生姓名：指导教师：职称：讲师工程师黑龙江工程学院二○一二年六月TheGraduationDesignforBachelor'sDegreeDesignofKeJiBuildingFoundationDitchSupportingStructureCandidate：Specialty：CivilEngineeringClass：08-2Supervisor：LecturerEngineerHeilongjiangInstituteofTechnology2012-06·Harbin黑龙江工程学院本科生毕业设计I摘要本设计为科技大厦基坑支护结构设计。拟建科技大厦工程位于哈尔滨市香坊区，其西临香顺街，南邻公滨路。拟建建筑物地面以上17层，地下1层，总建筑面积69533m2，经地质勘查，地基土层主要由杂填土、粘土、粉质粘土、粉土、粉质粘土构成。建筑±0.00相当于绝对标高17.25m，整平后地面标高为17.00m,基坑开挖深度为5.0m，框架结构。主体基坑采用两种不同的支护体系：一种是钢板桩锚杆支护体系，另一种是土钉墙支护体系。基坑采用喷射井点+止水帷幕降止水。本次设计的主要内容包括：支护方案的选择、钢板桩锚杆设计计算、土钉墙设计计算、基坑的稳定性验算、基坑降止水等。经验算，该基坑设计合理，方案可行，可满足基坑土方开挖，地下室结构施工和对周围环境保护的要求。关键词：深基坑；土钉墙；基坑稳定性；钢板桩；锚杆支撑。黑龙江工程学院本科生毕业设计IIABSTRACTThedesignofKeJibuildingfoundationditchsupportingstructure.ItislocatedinXiangfangDistrictofHarbincity,westneighbourXiangshunStreetandnorthneighbourGongbinRoad.Itis17-layertall,including1basementsanditsgeneralconstructionareais69533squaremeters.Foundationsoilismainlycomposedofmixedfill,clay,Siltyclay,Siltysoil,siltyclaycomposition.Thestructureexcavationdepthis5meters,frameconstruction.Themainbuildingfoundationusestwokindsofdifferentsupportsandprotectionssystems:Onekindisthesteelsheetpileaddingtheanchorrodsupportsandprotectionssystem,anotherkindistheearthnailwallsupportsandprotectionssystem.Buildingfoundationusessprayingthewellpoint+theclosedverticalwaterproofcurtainprecipitation.Themainelementsofdesigninclude:thechoiceofthesupportsandprotectionsplan,thedesigncalculationofsteelsheetpileaddingtheanchorrod,theearthnailwalldesigncalculation,andfoundationStabilitycheckingcalculation,foundationprecipitationandsoon.Afterthecheckingcalculation,thefoundationdesignisreasonable,theplanisfeasible,tomeettherequestoffoundationexcavation,constructionofthebasementstructureandenvironmentprotection.Keywords:Deepfoundation;Earthnailwall;Foundationstability;Steelsheetpile;Anchorrodsupport.黑龙江工程学院本科生毕业设计目录摘要.............................................................................................................................................................IAbstract....................................................................................................................................................II第1章绪论.........................................................................................................................................11.1选题的背景目的及意义........................................................................................................11.1.1选题的背景目的...........................................................................................................11.1.2选题的意义....................................................................................................................11.2国内外基坑工程研究状况....................................................................................................11.2.1国内基坑工程研究现状............................................................................................11.2.2国外基坑工程研究现状............................................................................................21.3基坑工程概况...........................................................................................................................21.3.1工程概况.........................................................................................................................21.3.2周边环境.........................................................................................................................21.4地质条件.....................................................................................................................................41.4.1工程地质条件...............................................................................................................41.4.2水文地质条件...............................................................................................................41.5拟解决的主要问题.................................................................................................................4第2章基坑支护方案选择及确定.........................................................................................52.1基坑支护设计基本要求........................................................................................................52.2基坑支护方案选择及确定....................................................................................................52.2.1支护方案的选择...........................................................................................................52.2.2支护结构体系的比较.................................................................................................72.2.3支护结构体系的确定.................................................................................................82.3本章小结....................................................................................................................................8第3章基坑支护结构设计计算书.........................................................................................93.1基坑支护结构设计参数说明...............................................................................................93.1.1地质力学指标参数.........