河北南水北调干渠阀井砌筑工程施工工法

'廊涿干渠第五标段第十二分部工程施工工法一、工程概况本分部工程为阀井砌筑工程，其中主要单元工程9个，其名称和位置如下表：名称桩号备注排气阀井LZ60+700手动蝶阀井和排水井LZ61+422排气阀井LZ62+614排气阀井LZ63+395排水阀井LZ64+478排气阀LZ64+634电动蝶阀井LZ65+277排气阀井LZ65+632排气阀井LZ65+970二|施工工法：以下步骤均采用流水施工，每个步骤紧密衔接。（一）排水井、排气阀井以及蝶阀井的施工准备工作1、施工场地清理在施工区域内，对有碍施工的道路，管线等，在施工前妥善处理好。对于有积水的小坑，应先排除积水，挖除淤泥，再行回填平整；对于原地含有大量有机物的草皮等都应进行清理。2、地面水排除backfillmaterialtothesurface,and1:100slopedrainagetogutters.Gutterwidth0.5Mdepth0.5m,M5groutedrubblemasonry.9.2mainengineeringcontentthisstandardpressurepipeandthemetalstructureinstallationpartmainincludingYunnanprovincetengchongCountyyongxingRiverprimaryandsecondaryhydropowerstationintheofpressurepipeandthepowerstationmetalstructure,whichlevelpowerstationpressurepipetotalabout562t(containingannex);IIlevelpowerstationpressurepipeabout733t(containingannex);levelpowerstationmetalstructureabout52.5t,containingdischargeGate2hole,rushedsandGate1hole,watermouthworkdoorandthestoppeddirtgatethe1hole,Qianpoolworkdoorandthestoppeddirtgatethe1hole;Secondarypowerstationmetaljunctionatabout19.5t,containingsandGate1hole,waterinletwatergateandtrashthe1hole;theirauxiliaryhoistequipmentandelectricalequipment.Concretepressurepipe,gate,trashandhoistingdeviceprojectpropertylist1-1~1-3.Table1-1themaincharacteristicsofthepenstocknumberitemparametertypecontrollersizeheadalongpipediameterpipelength11hydropowerstationpenstockopen-airexposedpipe,singlepipejointwatersupply1.3M931m0.8M8.3*2m22hydropowerstationpenstockopen-airexposedpipe,singlepipejointwatersupply1.4m1063.506m0.8M10*2mtable1-2hydropowerstationMaincharacteristicsofhydraulicmetalstructurenumberprojectnamegate,trash 为了保证土方施工顺利进行，场地内积水必须排除。尤其是雨季施工时，还要做好地面水的排除工作。地面水通常可采用设置排水沟、截水沟或修筑土堤等设施来排除，以防止浸入。在施工区域内考虑临时排水系统时，应注意与原排水系统相适应，临时排水设施应尽量与永久性排水设施相结合。3、开工前按图纸要求现场勘察，全站仪进行测量。4、资源准备包括施工人员、施工机械和钢筋加工。（二）排水干井1、基础开挖基础开挖时先清基，以清除草皮、乱石等杂物。然后采用1.5m3挖掘机进行土方开挖，可随管线进行开挖的随管线开挖进行。土方开挖至建基面时预留20cm的保护层，改用人工进行开挖，以确保基础土不受扰动。且建基面的平整度符合设计要求2、浇筑垫层用方木定出垫层顶高程，使方木顶高程与垫层顶高程相同，并将方木进行加固。然后用混凝土罐车将等级为C10的素混凝土运至现场，用溜槽将混凝土引至基底处进行浇筑，浇筑至与方木顶齐平为止，30软轴式振捣器振捣，使砼密实，表面平整度符合设计要求，并进行养护至规定强度。3、按照图纸对底板进行钢筋绑扎；预留出集水坑位置，用D300混凝土管做到底板基础里；预埋支墩和井壁钢筋，支护模板，进行“三检制”，经现场监理人员同意后，对底板进行混凝土浇筑，混凝土等级为C25W4F150，并养护至规定强度。4、按照图纸对支墩进行钢筋绑扎，支护模板，进行“三检制”，经现场监理同意后，浇筑C15的砼，并养护到规定强度。backfillmaterialtothesurface,and1:100slopedrainagetogutters.Gutterwidth0.5Mdepth0.5m,M5groutedrubblemasonry.9.2mainengineeringcontentthisstandardpressurepipeandthemetalstructureinstallationpartmainincludingYunnanprovincetengchongCountyyongxingRiverprimaryandsecondaryhydropowerstationintheofpressurepipeandthepowerstationmetalstructure,whichlevelpowerstationpressurepipetotalabout562t(containingannex);IIlevelpowerstationpressurepipeabout733t(containingannex);levelpowerstationmetalstructureabout52.5t,containingdischargeGate2hole,rushedsandGate1hole,watermouthworkdoorandthestoppeddirtgatethe1hole,Qianpoolworkdoorandthestoppeddirtgatethe1hole;Secondarypowerstationmetaljunctionatabout19.5t,containingsandGate1hole,waterinletwatergateandtrashthe1hole;theirauxiliaryhoistequipmentandelectricalequipment.Concretepressurepipe,gate,trashandhoistingdeviceprojectpropertylist1-1~1-3.Table1-1themaincharacteristicsofthepenstocknumberitemparametertypecontrollersizeheadalongpipediameterpipelength11hydropowerstationpenstockopen-airexposedpipe,singlepipejointwatersupply1.3M931m0.8M8.3*2m22hydropowerstationpenstockopen-airexposedpipe,singlepipejointwatersupply1.4m1063.506m0.8M10*2mtable1-2hydropowerstationMaincharacteristicsofhydraulicmetalstructurenumberprojectnamegate,trash 5、按照图纸对钢筋混凝土井壁绑扎钢筋，支护模板；预埋穿井壁管道钢筋和爬梯钢筋；在排水管与井壁之间安装防水套管；按图纸尺寸确定所穿管道的位置和穿口大小，支护模板；按照要求安装排水管和偏心半球阀。进行“三检制“，现场监理同意后，浇筑C25W4F150的混凝土，养护至规定强度。6、盖板与井壁之间用厚1:2水泥的砂浆找平，并抹成斜角。7、应用混泥土强度等级为C25W4F150的钢纤维混泥土按照图纸所给尺寸进行井盖的制作，且需注意预留孔的位置。7、土方回填（1）路面范围内的井室周围，采用石灰土、砂、砂砾等材料回填，其宽度小于40cm。（2）井室、支墩周围土方的回填，在混凝土达到设计强度后进行，并与管道基槽的回填同时进行。（3）井室周围回填压实时沿井室中心对称进行，不漏夯。（4）回填材料压实后与井壁紧贴。（5）靠近井壁处用人工夯进行夯实，避免井壁受损。注：排水湿井的施工方法与排水干井相同，不同之处是：排水湿井有溢流管，无偏心半球阀以及安装横向排水管的位置不同。（二）排气阀井1、基础开挖基础开挖时先清基，以清除草皮、乱石等杂物。然后采用1.5m3挖掘机进行土方开挖，可随管线进行开挖的随管线开挖进行。土方开挖至建基面时预留20cmbackfillmaterialtothesurface,and1:100slopedrainagetogutters.Gutterwidth0.5Mdepth0.5m,M5groutedrubblemasonry.9.2mainengineeringcontentthisstandardpressurepipeandthemetalstructureinstallationpartmainincludingYunnanprovincetengchongCountyyongxingRiverprimaryandsecondaryhydropowerstationintheofpressurepipeandthepowerstationmetalstructure,whichlevelpowerstationpressurepipetotalabout562t(containingannex);IIlevelpowerstationpressurepipeabout733t(containingannex);levelpowerstationmetalstructureabout52.5t,containingdischargeGate2hole,rushedsandGate1hole,watermouthworkdoorandthestoppeddirtgatethe1hole,Qianpoolworkdoorandthestoppeddirtgatethe1hole;Secondarypowerstationmetaljunctionatabout19.5t,containingsandGate1hole,waterinletwatergateandtrashthe1hole;theirauxiliaryhoistequipmentandelectricalequipment.Concretepressurepipe,gate,trashandhoistingdeviceprojectpropertylist1-1~1-3.Table1-1themaincharacteristicsofthepenstocknumberitemparametertypecontrollersizeheadalongpipediameterpipelength11hydropowerstationpenstockopen-airexposedpipe,singlepipejointwatersupply1.3M931m0.8M8.3*2m22hydropowerstationpenstockopen-airexposedpipe,singlepipejointwatersupply1.4m1063.506m0.8M10*2mtable1-2hydropowerstationMaincharacteristicsofhydraulicmetalstructurenumberprojectnamegate,trash 的保护层，改用人工进行开挖，开挖至垫层底，并按照图纸规格尺寸开挖出三通的放置位置，确保基础土不受扰动，且建基面的平整度符合设计要求。2、浇筑垫层用方木定出垫层顶高程，使方木顶高程与垫层顶高程相同，并将方木进行加固；将三通放进所挖位置之后，再在其周围包裹三毡二油，并安装偏心半球阀和排气阀，然后用混凝土罐车将等级为C10的素混凝土运至现场，用溜槽将混凝土引至基底处进行浇筑，浇筑至与方木顶齐平为止，30软轴式振捣器振捣，使砼密实，表面平整度符合设计要求，并进行养护至规定强度。3、按照图纸进行底板上层、底板下层、井壁和爬梯的钢筋，注意钢筋直径、数量和间距不得有误，如发现错误，应及时调整。进行“三检制“，现场监理人员认为合格后，进行混凝土C25W4F150的浇筑30软轴式振捣器振捣，使砼密实，表面平整度符合设计要求，并进行养护至规定强度4、在井壁顶铺筑一圈10cm厚的钢筋网。5、按照图纸绑扎盖板钢筋，且必须预留出井口位置，绑扎过程中需注意吊环钢筋及其洞口附加筋的布置。进行“三检制”，经现场监理人员认为合格后，进行混凝土C25W4F150的浇筑30软轴式振捣器振捣，使砼密实，表面平整度符合设计要求，并进行养护至规定强度。6、制作井盖应用混凝土强度等级为C25W4F150的钢纤维混泥土按照图纸所给尺寸进行井盖的制作，且需注意预留孔的位置。7、土方回填方法与排水井回填方法相同。backfillmaterialtothesurface,and1:100slopedrainagetogutters.Gutterwidth0.5Mdepth0.5m,M5groutedrubblemasonry.9.2mainengineeringcontentthisstandardpressurepipeandthemetalstructureinstallationpartmainincludingYunnanprovincetengchongCountyyongxingRiverprimaryandsecondaryhydropowerstationintheofpressurepipeandthepowerstationmetalstructure,whichlevelpowerstationpressurepipetotalabout562t(containingannex);IIlevelpowerstationpressurepipeabout733t(containingannex);levelpowerstationmetalstructureabout52.5t,containingdischargeGate2hole,rushedsandGate1hole,watermouthworkdoorandthestoppeddirtgatethe1hole,Qianpoolworkdoorandthestoppeddirtgatethe1hole;Secondarypowerstationmetaljunctionatabout19.5t,containingsandGate1hole,waterinletwatergateandtrashthe1hole;theirauxiliaryhoistequipmentandelectricalequipment.Concretepressurepipe,gate,trashandhoistingdeviceprojectpropertylist1-1~1-3.Table1-1themaincharacteristicsofthepenstocknumberitemparametertypecontrollersizeheadalongpipediameterpipelength11hydropowerstationpenstockopen-airexposedpipe,singlepipejointwatersupply1.3M931m0.8M8.3*2m22hydropowerstationpenstockopen-airexposedpipe,singlepipejointwatersupply1.4m1063.506m0.8M10*2mtable1-2hydropowerstationMaincharacteristicsofhydraulicmetalstructurenumberprojectnamegate,trash （三）手动蝶阀井和排水井1、基础开挖基础开挖时先清基，以清除草皮、乱石等杂物。然后采用1.5m3挖掘机进行土方开挖，可随管线进行开挖的随管线开挖进行。土方开挖至建基面时预留20cm的保护层，改用人工进行开挖，以确保基础土不受扰动。且建基面的平整度符合设计要求2、浇筑垫层用方木定出垫层顶高程，使方木顶高程与垫层顶高程相同，并将方木进行加固。然后用混凝土罐车将等级为C10的素混凝土运至现场，用溜槽将混凝土引至基底处进行浇筑，浇筑至与方木顶齐平为止，30软轴式振捣器振捣，使砼密实，表面平整度符合设计要求，并进行养护至规定强度。3、按照图纸对底板进行钢筋绑扎；预留出集水坑位置，并用D500混凝土管做到底板基础里；预埋支墩、井壁和站脚钢筋，支护模板，自检合格后，报检，经现场监理人员同意后，对底板进行混凝土浇筑，混凝土等级为C25W4F150，并养护至规定强度。4、按照图纸对支墩进行钢筋绑扎，支护模板，自检，报检经现场监理同意后，浇筑C25W4F150的砼，并养护到规定强度。5、按照图纸对钢筋混凝土井壁绑扎钢筋，并确定和预留管道穿越位置和大小以及与预制钢筋混凝土方涵的连接位置和大小，预埋穿井壁管道钢筋和爬梯钢筋，支护模板；按照要求安装排水管、伸缩节和手动蝶阀。进行“三检制”，现场监理同意后，浇筑C25W4Fbackfillmaterialtothesurface,and1:100slopedrainagetogutters.Gutterwidth0.5Mdepth0.5m,M5groutedrubblemasonry.9.2mainengineeringcontentthisstandardpressurepipeandthemetalstructureinstallationpartmainincludingYunnanprovincetengchongCountyyongxingRiverprimaryandsecondaryhydropowerstationintheofpressurepipeandthepowerstationmetalstructure,whichlevelpowerstationpressurepipetotalabout562t(containingannex);IIlevelpowerstationpressurepipeabout733t(containingannex);levelpowerstationmetalstructureabout52.5t,containingdischargeGate2hole,rushedsandGate1hole,watermouthworkdoorandthestoppeddirtgatethe1hole,Qianpoolworkdoorandthestoppeddirtgatethe1hole;Secondarypowerstationmetaljunctionatabout19.5t,containingsandGate1hole,waterinletwatergateandtrashthe1hole;theirauxiliaryhoistequipmentandelectricalequipment.Concretepressurepipe,gate,trashandhoistingdeviceprojectpropertylist1-1~1-3.Table1-1themaincharacteristicsofthepenstocknumberitemparametertypecontrollersizeheadalongpipediameterpipelength11hydropowerstationpenstockopen-airexposedpipe,singlepipejointwatersupply1.3M931m0.8M8.3*2m22hydropowerstationpenstockopen-airexposedpipe,singlepipejointwatersupply1.4m1063.506m0.8M10*2mtable1-2hydropowerstationMaincharacteristicsofhydraulicmetalstructurenumberprojectnamegate,trash 150的混凝土，养护至规定强度。6、按照图纸绑扎井盖钢筋，并预留出图纸规定大小的进入孔的位置，支护模板，自检合格后，报检，经现场监理同意后，浇筑C25W4F150的混凝土，养护至规定强度。7、土方回填方法与排水井相同注：电动蝶阀井施工工法与手动蝶阀井施工工法相同，不同之处是采用的电动蝶阀。（四）注意事项1、绑扎钢筋时需注意钢筋的的数量，间距、规格、弯曲角度以及焊接方式和长度。2、浇筑混凝土时应分层浇筑，并振捣密实，平整度符合规范要求。3、混凝土应定期洒水养护，直至到达所要求的强度。backfillmaterialtothesurface,and1:100slopedrainagetogutters.Gutterwidth0.5Mdepth0.5m,M5groutedrubblemasonry.9.2mainengineeringcontentthisstandardpressurepipeandthemetalstructureinstallationpartmainincludingYunnanprovincetengchongCountyyongxingRiverprimaryandsecondaryhydropowerstationintheofpressurepipeandthepowerstationmetalstructure,whichlevelpowerstationpressurepipetotalabout562t(containingannex);IIlevelpowerstationpressurepipeabout733t(containingannex);levelpowerstationmetalstructureabout52.5t,containingdischargeGate2hole,rushedsandGate1hole,watermouthworkdoorandthestoppeddirtgatethe1hole,Qianpoolworkdoorandthestoppeddirtgatethe1hole;Secondarypowerstationmetaljunctionatabout19.5t,containingsandGate1hole,waterinletwatergateandtrashthe1hole;theirauxiliaryhoistequipmentandelectricalequipment.Concretepressurepipe,gate,trashandhoistingdeviceprojectpropertylist1-1~1-3.Table1-1themaincharacteristicsofthepenstocknumberitemparametertypecontrollersizeheadalongpipediameterpipelength11hydropowerstationpenstockopen-airexposedpipe,singlepipejointwatersupply1.3M931m0.8M8.3*2m22hydropowerstationpenstockopen-airexposedpipe,singlepipejointwatersupply1.4m1063.506m0.8M10*2mtable1-2hydropowerstationMaincharacteristicsofhydraulicmetalstructurenumberprojectnamegate,trash'