基坑围护降水及土方开挖专项施工方案

-1-基坑围护、降水及土方开挖工程专项施工方案SpecialConstructionSchemeofFoundationDitchSupport,PrecipitationandEarthworkExcavationEngineering一、工程概况ProjectOverview1.1概述Summary工程名称：上海联恒异氰酸脂有限公司MDI扩建项目工艺装置土建工程、ProjectName：Lianhengisocyanateresinco.,LTD.ShanghaiMDIexpansiondevicesiscivilengineering工程地址：上海市漕泾化工区楚华路25号ProjectAddress:ShanghaicaojingchemicalOuChuHuaroadno.25建设单位：上海联恒异氰酸脂有限公司Theconstructionunits:Shanghailianhengisocyanateresinco.,LTD设计单位：上海科元燃化工程设计有限公司Designunit:Shanghaiyuancombustionengineeringdesignco.,LTD勘察单位：上海岩土工程勘察设计有限公司Prospectingunits:Shanghaigeotechnicalengineeringsurveyanddesignco.,LTD施工单位：中国核工业中原建设有限公司Constructionunit:Chinanuclearindustryzhongyuanconstructionco.,LTD监理单位：上东洋工程（上海）有限公司Supervisionunits:theOrientalengineering(Shanghai)co.,LTD1.2工程概况ProjectOverview：本工程位于上海市漕泾化工区楚华路25号，上海巴斯夫聚氨酯有限公司内的A400地块上。而上海联恒异氰酸脂有限公司MDI扩建项目工艺装置土建工程，由MDI合成单元、MDI初期雨水池、MDA初期雨水池、MDA处理单元、雨淋阀室和管架五大单元组成。ThisprojectislocatedinShanghaiCityCaojingChemicalDistrictChuHuaRoadNo.25,ShanghaiBASFPolyurethaneCo.LtdinA400block.AndShanghaiLianhengISOcyanategreaseCo.,Ltd.MDIexpansionprojectprocessdeviceforcivilengineering.BysynthesizingMDIunit,MDIearlyrainpool,MDAintheearlyrainpool,MDAtreatmentunit,thedelugevalvechamberandtubeframefiveunitcomposed.1.3基坑概况FoundationDitchOverview：1.3.1MDI合成单元Syntheticunit-2-（1）光气隔离舱、HCL吸收及尾气处理的垫层底标高-2.25m，板底厚为1200mm，垫层厚100mm，建筑面积为638.44m²。本工程设计标高100.000m为±0.000所应对的绝对标高为吴淞标高+4.500m，场地内部自然地面绝对标高约为+4.500m，即为相对标高±0.000m,则开挖深度为2.25m。其中，水池的垫层底标高-5.90m，板厚为1000mm，垫层厚100mm，建筑面积为31.59㎡。本工程设计标高100.000m为±0.000所应对的绝对标高为吴淞标高+4.500m，场地内部自然地面绝对标高约为+4.500m，即为相对标高±0.000m,则开挖深度为5.9m。(1)Thephosgenecompartment,HCLabsorptionandtailgastreatmentofcushionbottomelevationof2.25m,thebottomoftheplatethicknessis1200mm,cushionthicknessof100mm,withaconstructionareaof638.44msquared.Thisengineeringdesignelevationof100.000mby0.000mmtocopewiththeabsolutelevelofwusongelevation+4.500m,fieldinsidethenaturalgroundelevationisabout4.500m+absolutely,istherelativeelevation+/-0.000m,theexcavationdepthof2.25m.Poolofcushionbottomelevationof5.90m,thethicknessis1000mm,cushionthicknessof100mm,withaconstructionareaof31.59㎡.Thisengineeringdesignelevationof100.000mby0.000mmtocopewiththeabsolutelevelofwusongelevation+4.500m,fieldinsidethenaturalgroundelevationisabout4.500m+absolutely,istherelativeelevation+/-0.000m,theexcavationdepthof5.9m.（2）HCL压缩机的垫层底标高-1.18m，板厚为1000mm，垫层厚100mm，建筑面积为127.02㎡。本工程设计标高100.000m为±0.000所应对的绝对标高为吴淞标高+4.500m，场地内部自然地面绝对标高约为+4.500m，即为相对标高±0.000m,则开挖深度为1.18m。(2)HCLcompressorcushionbottomelevationof1.18m,thicknessis1000mm,cushionthicknessof100mm,withaconstructionareaof127.02㎡.Thisengineeringdesignelevationof100.000mby0.000mmtocopewiththeabsolutelevelofwusongelevation+4.500m,fieldinsidethenaturalgroundelevationisabout4.500m+absolutely,istherelativeelevation+/-0.000m,theexcavationdepthof1.18m.（3）氯苯冷却、氯苯精馏的承台垫层底标高-2.17m，承台厚度1300mm，垫层厚度100mm；地梁的梁顶标高-0.77m，根据地梁的截面尺寸对梁底进行开挖，其垫层厚度100mm,建筑面积为：2861.71m²。本工程设计标高100.000m为±0.000所应对的绝对标高为吴淞标高+4.500m，场地内部自然地面绝对标高约为+4.500m，即为相对标高±0.000m,则开挖深度为2.17m。-3-(3)theeffectsofcooling,chlorobenzenerectifyingcapcushionbottomelevationof2.17m,thethicknessofthepilecapsis1300mm,cushionthickness100mm;Groundbeambeamtopelevationof0.77m,thebasebeamtotheexcavationofthebottomofthebeam,thesectionsizeofthecushionthicknessis100mm,withaconstructionareaoffor:2861.71msquared.Thisengineeringdesignelevationof100.000mby0.000mmtocopewiththeabsolutelevelofwusongelevation+4.500m,fieldinsidethenaturalgroundelevationisabout4.500m+absolutely,istherelativeelevation+/-0.000m,theexcavationdepthof2.17m.1.3.2MDI初期雨水池EarlyrainpoolMDI初期雨水池的垫层底标高-3m，板厚为500mm，垫层厚100mm，建筑面积为64.89㎡。本工程设计标高100.000m为±0.000所应对的绝对标高为吴淞标高+4.500m，场地内部自然地面绝对标高约为+4.500m，即为相对标高±0.000m,则开挖深度为3m。其积水坑的垫层底标高-3.45m，板厚为500mm，垫层厚100mm，建筑面积为6.25㎡。本工程设计标高100.000m为±0.000所应对的绝对标高为吴淞标高+4.500m，场地内部自然地面绝对标高约为+4.500m，即为相对标高±0.000m,则开挖深度为3.45m。MDIrainearlycushionpondbottomelevation-3m,athicknessof500mm,cushionthick100mm,constructionareaof64.89㎡.Theengineeringdesignelevation100.000maddressedbyanabsoluteelevation±0.000Wusongelevation+4.500m,naturalfloorspaceinsidetheabsoluteelevationofabout+4.500m,istherelativeelevation±0.000m,theexcavationdepthof3m.Itswaterpitbottomcushionelevation-3.45m,athicknessof500mm,cushionthick100mm,constructionareaof6.25㎡.Theengineeringdesignelevation100.000maddressedbyanabsoluteelevation±0.000Wusongelevation+4.500m,naturalfloorspaceinsidetheabsoluteelevationofabout+4.500m,istherelativeelevation±0.000m,theexcavationdepthis3.45m.1.3.3MDA合成单元Synthesisunit（1）合成单元的承台垫层底标高-2.10m，承台厚度1200mm，垫层厚度100mm；地梁的梁顶标高-0.80m，根据地梁的断面尺寸对梁底进行开挖，其垫层厚度100mm；排水沟的垫层底标高为-0.85m，根据图纸的设计要求，底板厚度150-450mm，建筑面积为：2861.71m²。本工程设计标高100.000m为±0.000所应对的绝对标高为吴淞标高+4.500m，场地内部自然地面绝对标高约为+4.500m，即为相对标高±0.000m,则开挖深度为2.10m。-4-(1)Synthesisunitselevation-2.10m,capsthickness1200mm,cushionthickness100mm;topelevationbeamtobeam-0.80m,cross-sectionaldimensionsofthebeamattheendofthebeambaseexcavation,thematthicknessof100mm;cushionbottomelevationdrains-0.85m,accordingtothedesignrequirementsofthedrawings,floorthickness150-450mm,