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1、摘要本设计是根据作者在长沙市金色华雅大洒店基坑支护工程工地的实地实习和参考相关资料、规范而做出的。根据场地工程地质条件和水文条件,提出了几种不同的支护方案。因为深基坑工程的支护形式决定了基坑工程的安全性和经济性,因此,在满足基坑支护工程安全性的条件下,根据基坑的性质、建筑场地的地质条件和周边环境,采用不同的支护结构的组合形式可大大降低深基坑工程的支护费用。木设计根据基坑具体情况,进行方案论证后得出最终支护方案:东、西面基坑采用土钉支护,南北面采用桩锚支护。土钉支护采用土压力经验分布法设计计算,桩锚支护采用分层等值梁法设计计算,并对设计结果进行
2、了各种验算,结果都满足要求。另外,木文还设计了一整套相应的施工方案,包括施工工艺、机械选用计划、施工工期、支护监测以及施工管理等等。最后,根据设计和施工组织设计作出了本工程的预算书,总造价为9859405.64元,单价为1559.56元/n?。关键词:基坑支护;桩锚支护;土钉支护;施工组织设计;工程预决算AbstractAccordingtotheauthor^practiceexperienceinbuildingpitconstructionsiteofGold•HuayaHotelinChangShaaswellasrelatedmet
3、erialsandcodes,thedesignwasmade.Basedonsitegeologicalconditionsandhydrologicalconditions,severaldifferentsupportingprogrammeswereproposed,Asthesupportingformsoffoundationpitdeterminesecurityandeconomicalefficiencyofadeepfoundationproject.Therefore,tomeetthesecuritycondition
4、softhefoundationpitsupporting,aswellconsideringgeologicalconditionsofthesiteandsurroundingenvironment,theintegrateduseofdifferentsupportingstructureformscangreatlyreducethedeepfoundationpitsupportingcosts.Basedonthesituationofthefoundationpit,thefinalsupportingprogrammeswer
5、egotaftercomparison.Soilnailingsupportingwasadopedintheeastandwestofthepit,andpileanchorsupportingstructurewasadopedinthesouthandnorthofthepit.Thecalculationofthesoilnailingsupportingwasbasedonempiricaldistributionofearthpressure.Andthecalculationofpileanchorsupportingwasba
6、sedonequivalentbeammethod.Meanwhile,allkindsofcheckingcalculationweremade,andtheresultsallmeettherequirements.Acompleteschemewasalsodesigned,includingconstructionprocess,machineryselectionscheme,constructionperiod,supportmonitoringandconstructionorganizationdesign•Finally,a
7、ccordingtothedesignandconstructionorganizationdesign,budgetstatementwasmade,thetotalcostwas9994787.03yuan,theunitpricewas1580.98yuanpersquaremeter.Keywords:foundationpitsupporting;pileanchorsupporting;soilnailingsupporting;constructionorganizationdesign;budgetstatement第一篇基坑
8、支护工程方案设计第1章设计条件及其分析1.1工程概况拟建长沙恒大城四期基坑工程位于长沙恒大城住宅小区内,原始地貌单元为丘岗,整体地势为南高北低,本次勘探点标高介于5