人工挖孔桩施工方案(打)

ndoverallleadershipresponsibilityforsafety.AdministrativeDeputyiswithinthescopeoftheirrespectiveresponsibilitiesatvariouslevelsofsecurityresponsibility,inchargeofsecurityworkinthecontextofleadership,responsibletotheChief.Fifthopenpitproductionsafetyaccidentinvestigationsystem,performedonaproductionsafetyaccidentfournoprinciple.Imposedonproductionsafetyaccidentreportstepbystepreportingthreechannels,namely,UnitChief,administrationandsafetysupervisionsystemcounterparttosuperiorleadership,reportsinatimelymanner.Sixthpitmustimplementthewhoisinchargeofwho'sinchargeandhosemustbesafeprinciplesinplanning,layout,checkproductionwork,summarizedandevaluatedatthesametime,plans,features,review,summary,ratingsafetywork.Firmlyestablishingsafetyistheeffectiveness,safetyisthecredibility,safetyisthecompetitivenessawareness,tomakesafetywork.Seventhminingtradeunionorganizationaccordingtolawtheworkerstoparticipateintheworksafetyofdemocraticmanagementanddemocraticsupervision,safeguardworkers'legitimaterightsandinterestsinrespectofsafety.PersonaldeathandaTradeUnionhastherighttoparticipateinthemajoraccidentinvestigations,relyonthemassestodoproductionsafetywork.Eighthpitmustbebasedonrelevantlawsandregulations,industrystandardsandcompanyandGod'sstandards,rulesandregulationsissuedbythecompany,developingrulesandregulationsforcoalproduction,institutionalizationan培养学生的阅读习惯，通过阅读欣赏短文，引导学生感悟大自然的美，激发热爱家乡的感情。语文生活，让学生认识到生活中处处有语文，学习语文应走出课堂，在生活中自主地认字。通过口语交际，培养学生交流的兴趣和交际能力。人工挖孔桩施工方案一、工程概况本工程为龙岩宇鑫机械制造有限公司综合楼，系框架结构。地上总建筑面积1719.4M2，建筑层数为地上五层，建筑高度17.85M。基础形式为人工挖孔扩底灌注桩。本工程有30根桩，桩径为800mm，桩身长度为10米到15米不等。二、施工要点1、人工挖孔灌注桩的施工程序：平整场地→放线、定桩位→挖第一节桩孔土方→支模浇第一节混凝土护壁→在护壁上施测标高及桩位十字轴线→安装活动井盖、垂直运输架、起重电动葫芦或卷扬机，活底吊土桶，排水通风，照明设施等→第二节桩身挖土→清理桩孔四壁，校核桩孔垂直度和直径→拆上节模板，支第二节模板，浇第二节砼护壁→重复第二节挖土，支模，浇砼护壁工序，循环作业直至设计深度→检查持力层后进行扩底→清理虚土、排除积水、检查尺寸和持力层→吊放钢筋笼就位→浇注桩身2、成孔试验的检验,检验内容如下:a、安全和质量是否有确实保证。b、成孔试验过程中，桩侧壁土层坍塌，流沙，涌沙现象，混凝土护壁是否起到应有效果，桩端扩大头成型能否符合设计要求c、每根桩端处持力层土质及标高是否与设计图纸及勘察报告相符。d、施工的爆破和排水是否影响相邻建筑和市政设施的安全和正常使用。ndoverallleadershipresponsibilityforsafety.AdministrativeDeputyiswithinthescopeoftheirrespectiveresponsibilitiesatvariouslevelsofsecurityresponsibility,inchargeofsecurityworkinthecontextofleadership,responsibletotheChief.Fifthopenpitproductionsafetyaccidentinvestigationsystem,performedonaproductionsafetyaccidentfournoprinciple.Imposedonproductionsafetyaccidentreportstepbystepreportingthreechannels,namely,UnitChief,administrationandsafetysupervisionsystemcounterparttosuperiorleadership,reportsinatimelymanner.Sixthpitmustimplementthewhoisinchargeofwho'sinchargeandhosemustbesafeprinciplesinplanning,layout,checkproductionwork,summarizedandevaluatedatthesametime,plans,features,review,summary,ratingsafetywork.Firmlyestablishingsafetyistheeffectiveness,safetyisthecredibility,safetyisthecompetitivenessawareness,tomakesafetywork.Seventhminingtradeunionorganizationaccordingtolawtheworkerstoparticipateintheworksafetyofdemocraticmanagementanddemocraticsupervision,safeguardworkers'legitimaterightsandinterestsinrespectofsafety.PersonaldeathandaTradeUnionhastherighttoparticipateinthemajoraccidentinvestigations,relyonthemassestodoproductionsafetywork.Eighthpitmustbebasedonrelevantlawsandregulations,industrystandardsandcompanyandGod'sstandards,rulesandregulationsissuedbythecompany,developingrulesandregulationsforcoalproduction,institutionalizationan培养学生的阅读习惯，通过阅读欣赏短文，引导学生感悟大自然的美，激发热爱家乡的感情。语文生活，让学生认识到生活中处处有语文，学习语文应走出课堂，在生活中自主地认字。通过口语交际，培养学生交流的兴趣和交际能力。23、为防止塌孔和保护安全操作，直径1.2M以上的桩孔多设砼支护，每节高0.45～0.85m，厚8～15CM。3）、护壁施工采用一节组合式木材模拼装而成，拆上节支下节，砼强度大1Mpa即可拆模。4）、挖孔由人工自上而下逐层用镐、锹进行，挖土次序先挖中间部分后挖周边，允许误差±50MM。扩底部分采取先挖桩身圆柱体，再按扩底尺寸从上到下削土修成扩底成形。弃土装入活底吊桶或箩筐内，垂直运上。人工挖孔桩底部如为岩土，一般应深入岩面不小于200MM，底面应平整不带泥沙，扩大头成锅底形、锅底中心比四周低200mm。5）、○1桩中线控制：中线控制是在第一节砼护壁上设十字控制点，每一节设横杆吊大线锤做中心线，用水平尺找圆周。○2桩顶标高控制：在完成第一节护壁后将标高引测到护壁顶，桩身施工时便于控制桩顶。6）、直径1.2m以内的桩，钢筋笼的制作与一般灌注桩的方法相同，对直径和长度较大的钢筋笼，一般在主筋内侧每隔2.0m设一道ф16以上的加强箍，每隔一箍在箍内设一井字加强支撑，与主筋焊接牢固成为一整体。7）、桩身砼的浇注。采用塌落度4-8cm，砼下料采用串桶，深桩采用砼溜管；砼要垂直灌入桩空内，并应连续分层浇筑，每层厚度不超过1.5m。8)、砍桩时先将标高引测到桩身，画出水平线，保证桩头平整没有块渣，锚入承台不小于100㎜，钢筋锚入不小于35d。ndoverallleadershipresponsibilityforsafety.AdministrativeDeputyiswithinthescopeoftheirrespectiveresponsibilitiesatvariouslevelsofsecurityresponsibility,inchargeofsecurityworkinthecontextofleadership,responsibletotheChief.Fifthopenpitproductionsafetyaccidentinvestigationsystem,performedonaproductionsafetyaccidentfournoprinciple.Imposedonproductionsafetyaccidentreportstepbystepreportingthreechannels,namely,UnitChief,administrationandsafetysupervisionsystemcounterparttosuperiorleadership,reportsinatimelymanner.Sixthpitmustimplementthewhoisinchargeofwho'sinchargeandhosemustbesafeprinciplesinplanning,layout,checkproductionwork,summarizedandevaluatedatthesametime,plans,features,review,summary,ratingsafetywork.Firmlyestablishingsafetyistheeffectiveness,safetyisthecredibility,safetyisthecompetitivenessawareness,tomakesafetywork.Seventhminingtradeunionorganizationaccordingtolawtheworkerstoparticipateintheworksafetyofdemocraticmanagementanddemocraticsupervision,safeguardworkers'legitimaterightsandinterest