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1、第一节砼的强度等级及工程量海亮大都汇项目11#楼地下室底板面积1300m2,地下室底板砼强度等级C40、S8,底板厚1.4m,包括电梯基坑及集水坑。砼量2100m3左右,该地下室底板砼采用青海春发搅拌站供应商品砼,搅拌运输车运送至现场,由砼输送泵送入模浇筑。14、15轴之间,34、55轴之间设1000宽后浇加强带。第二节施工准备工作一、砼输送泵结合工程的具体情况,该工程地下室底板浇灌,以后浇带分三段浇灌,每段砼量700m3,采用2台砼输送泵,综合各种不利因素,一般施工时输送量平均考虑,每台砼输送泵每小时输送量为25m3,约需要14小时可以浇灌完毕。二、
2、砼搅拌运输车该工程施工根据其它工程捣制的经验,每台砼输送泵均配备5台搅拌运输车,才能满足砼输送泵不间断连续浇灌,共计用10台砼搅拌运输车。dryconditionswithlowcorrosionofsteelwithlowcorrosion.Foundationsoilsarenon-corrosivetoconcretestructures,reinforcementofreinforcedconcretestructuresandsteelstructureswithweakcorrosive.(4)stationanti-floating,an
3、danti-infiltrationdesignlevel:accordingtoShaanxiProvinceengineeringsurveyInstituteprovidesofMetroLine1lineanti-floatinglevel(2008.7.16)results,intendsbuiltdateParkStationanti-floating,andanti-infiltrationdesignlevelelevationrespectivelyfor391.00mand389.00m1.2.3specialgeologicalc
4、onditions(1)intendsbuiltsitemaydistributionabandoneddry,dryinthemayfillinghasblockstone,constructioninthealsomayencounterednotidentifiedofundergroundstructurereal,hardreal,shouldtimelyprocessing.(2)fill:thecompositionofthesoilmaterialscomplex,particlesizeisextremelyuneven,soildi
5、fferences,loosestructure,excavationiseasytocollapseandcausegrounddeformation.(3)thecollapsibilityofloess:accordingtothissurveyandexplorationwells(explorationwellsinthetotalcompleted7)soilsamplesoiltestresults,depthofcollapsibilityloess6.50~11.50m,stationmain,flatwindPavilion,air
6、shaftsandchannels,regardlessofloesscollapsibilityproblem.Chaptertwosupportingprogrammeselectionandcompare2.1typesofFoundationpitsupportanditscharacteristicsandscope2.1.1ofdeepmixingcement-soildeepmixingcement-soilretainingwallistheretainingwallwithdeepmixerinplaceandenteredforci
7、blymixingcementtoformacontinuousoverlappingofsoil-cementcolumnreinforcedretainingwall.Advantagesofcement-soilretainingwall:duetothepitswithoutsupporttofacilitatemechanizedrapid11三、施工平面布置为了保证砼泵送顺利进行,以确保施工现场道路畅通,便于砼的入模浇灌,现场由东向西浇筑,基坑四周道路畅通;可采用2台汽车泵浇筑四、施工劳动力组织为了保证底板连续按计划施工,除上述提到的具体方
8、法以外,很大程度取决于施工组织合理化,为此特制订如下劳动组织计划,从砼浇筑开始到最后完成,每日