单体土方开挖及换填施工方案.doc

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1、EarthworkExcavationand3:7LimeSoilBackfillingConstructionMethodStatement土方开挖及灰土换填施工方案一、ConstructionScope施工范围Thisconstructionwillapplytobuilding12Chemicalandbuilding13Waste.本次进行施工的建筑为12号单体化学品及危废库和13号单体废品库。二、CompilationBasis编制依据1、Constructionblueprint施工蓝图2、Onsiteactualcondition现场实际情况3、UnifiedStandar

2、dforConstructionalEngineeringConstructionQualityAcceptance《建筑工程施工质量验收统一标准》GB50300-20134、GroundFoundationConstructionEngineeringConstructionQualityAcceptanceSpecifications《建筑地基基础工程施工质量验收验收规范》GB50202-20025、ConstructionSlopeEngineeringTechnicalSpecifications《建筑边坡工程技术规范》(GB50330-2013)6、ConstructionGr

3、oundFoundationTreatmentTechnicalSpecifications《建筑地基处理技术规范》(JGJ79-2012)三、ExcavationMethod开挖方法四、ChemicalBuilding:thebuilding isreinforcedconcreteframestructure, independentfoundation, bottomelevationoffoundation-1.8m,with1mthick3:7 limesoilbackfillunderthefoundation,thebottomelevationoflimesoilback

4、fillinglayerunderthefoundationis-2.9m.Thefloor isarchitecturefloor, and limesoil backfill layer bottomelevation undertheflooris-0.97m, building ±0.00 isequivalenttotheabsoluteelevationof +450.1m.Considering theabovefactors, thefoundationshallbeexcavatedmassivelyonthewholeto-0.97m,andthenexcavated

5、intheshapeofstripealongthegridsof J1、J2、J3to-1.900,thebottomelevationofthespacerofthepilecap.Ifthereisaneedtoslope,abidebytherockandsoilreportandsafetyrequirement.1:0.75slopingissuitable.1、化学品及危废库：该建筑为钢筋混凝土框架结构，基础采用独立基础，基础底面标高为-1.8m，基础下需进行3：7灰土回填施工，回填厚度1m，基础下灰土回填层底面标高为-2.9m，地坪为建筑地坪，地坪下灰土回填层底面标高为-

6、0.97m，建筑±0.00相当于绝对标高+450.1m，综合上述因素，本建筑基础土方开挖采用整体开挖至-0.97m，再沿J1、J2、J3轴方向条形开挖，开挖至承台垫层底标高-1.900，然后在每个基础承台位置进行条状开挖，开挖至灰土换填层底标高-2.900。开挖过程中需要放坡时应按岩土报告及安全要求进行放坡。以1：0.75放坡为宜。Excavationsequencediagram开挖顺序图Foundationpitprofilemap基坑剖面图TheWasteBuilding: upperstructureof waste warehouseissteelstructure,found

7、ation isanindependentfoundation, ±0.00isequivalenttotheabsoluteelevation+449.4m, foundationbottom elevationis-1.8m.Workmethodforlimesoiltreatmentunderthefoundationandthedetailsforarchitecturefloorarethesamewithbuilding