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1、摘要近年来随着经济的发展,社会的进步,城市化进程的加快,高层建筑和市政工程大量涌现。高层建筑的建造、大型市政设施的施工及大量地下空间的开发,必然会有大量的深基坑工程产生。建筑物高度越高,其埋置深度也越深,相应的对基坑工程的要求也就越高。深基坑支护结构的设计、施工、监测等是近年来经常遇到的技术难题。深基坑支护不仅要求确保边坡的稳定,而且要满足变形控制要求,保证基坑内正常作业安全,而且要防止基坑及坑外土体移动,保证基坑附近建筑物、道路、管线的正常运行。为了满足如今建筑物的支护,基坑工程也在朝更大、更深的要
2、求迈进。本设计主要是对某科技楼工程基坑支护结构进行设计,首先要确保周围建筑物、道路、管线等的正常安全使用,同时要求围护结构的稳定性好,沉降位移小。设计主要釆用的支护方式是钻孔灌注桩和土钉墙两种,同时,钻孔灌注桩采用的内支撑形成支护体系。基坑降水主要在基坑周围设置降水井,采用集水明排法降水方案。设计最后针对支护和降水方案,对基坑施工工艺及基坑监测进行了大致说明。关键词:深基坑;钻孔灌注桩;土钉墙;降水;施工;监测AbstractInrecentyears,witheconomicdevelopment,
3、socialprogress,urbanization,andhigh-risebuildingsandpublicworksinlargenumbers•Construction,constructionoflargemunicipalfacilitiestodevelophigh-risebuildingsandalargeundergroundspace,theremustbealotofdeepexcavationproduced•Thehigherthebuildingheight,thed
4、epthofitsburieddeeper,correspondingtotherequirementsofthehigherexcavation.Deepexcavationstructuraldesign,construction,monitoringandothertechnicalproblemsareoftenencounteredinrecentyears.Deepexcavationrequiresnotonlyensurethestabilityoftheslope,butalsoto
5、meettherequirementsofdistortioncontrol,toensurethenormaloperationofthepitsafety,butalsotopreventthesoilpitandpitoutsidemovetoensurepitnearbuildings,roads,pipelinesnormaloperation.Inordertomeettodayshoring,excavationofthebuildingisalsomovinginalarger,dee
6、perdemandsforward・Thisdesignisascienceandtechnologybuildingprojectexcavationstructuredesign,firstmakesurethatthesurroundingbuildings,roads,pipelinesandothernormallysafetouse,whileretainingstructurerequiresgoodstability,asmallsettlementdisplacement•Suppo
7、rtingmannerdesignedprimarilyusestwoboredandsoilnailwall,whileusingthesupportformBoredsupportingsystem.Themainsettingprecipitationpitdewateringwellsaroundthepit,usingthemethodofprecipitationschemecatchmentnextrow.Finally,supportingthedesignandprecipitati
8、onschemeofexcavationpitmonitortheconstructionprocessandweregenerallydescribed.Keywords:deepexcavation;bored;soilnailwall;precipitation;construction;monitoring第1章前言31.1基本技术要求41.1.1设计的基本技术要求41.1.2施工的基本技术要求51•2基坑工程设计51.2.1设计依据51.2.2