节水灌溉施工方案

地形平坦开阔，地层由第四系全新冲积层，第四系上更新统冲层组成，局部表覆第四系全新统人工堆积层。第四系全新统冲积层厚度约25～50m，岩性主要为黏土、粉质黏土、粉土、粉砂、细砂；第四系上更新统冲积层厚度大于50m，岩性主要为黏性土、粉土、粉细砂等。管桩深度范围内地层主要为：粉土、黏土、粉质黏土，局部表层为杂填土。couplingCentreshallbechecked,thesecondpouredconcretestrengthofmorethan70%.Intheprocessofreamingorboring,apartfromthespecialprovisionsinfactory,doesnotallowanyworkthatmayaffectthecouplingCentre,suchasirrigation,tocylinderconnectionstofloodthecondenserpipesandsoon.Wellboring,hingeboltholeflangewithcouplingofvertical,notoblique.Mountingboltsshouldbeaddedlubricants,typinggentlywithasmallhammer,nottoolooseortootight,packedtheboltswiththecorrespondingsealscrewholeshouldbemarked.6.4.5.4.2couplingreamedandpairingsisclosetothediameterofboltbearinggoodhingeholes,dressedwithagoodtwocouplingboltsbeforeyoucanmovetherotor,boring-reamingholeinturn.Couplingboltsmustbetightcouplingissymmetricaldiameter,inboring,reaming,twoboltsout.Wellboring,hingeboltholeflangewithcouplingofvertical,notoblique.Duetothecouplingboltsinaccordancewithhingeholescorrespondingtothediameterofthescrewholesonebyoneafterprocessing,processingbackboltinstallationlocationcannotbechanged,soaccordingtoboltaftertheactualweightdifferenceofnutandlockwashertomatch.Generalrequirementsforcouplingtwosymmetricaldiameterbolt,nutandlockwasher'stotalweightdifferenceshouldnotbegreaterthan10gandknocksstampedmark.(SeeFigure18)Thecouplingboltsapplylubricant,andthengentlywithcopperhome,nottoolooseortootight.BoltAssemblyisfinished,symmetricaltighteningallboltsto30%,50%,70%,100%force,andcheckthecouplingflutterandbeforeconnectingthecirclegraduallychangesitsvalueshouldbelessthan0.02mm.Tighteningtorqueofthecouplingboltsshallcomplywiththetechnicalrequirementsmanufacturersdrawings,withadynamometricwrenchorlogtensiontools.Threewheelrotorswingtestcouplingconnectionsshouldbechecked:takingleave,11、水肥一体化节水灌溉系统11.1施工顺序管沟开挖→土方回填→砼工程→UPVC主管道→支管安装→配件及阀门安装→滴灌管铺设及配套设备安装11.2施工方法11.2.1管沟开挖前，根据监理工程师提供的网点及水准点的基本数据，按实际施工需要增加控制点。11.2.2进行施工测量放线，从首部枢纽开始，定出主、支管进水口位置，根据监理工程师提供的网点及现场参照物用经纬仪引出主管轴线、要先撒灰。再用经纬仪从主管出水口引出支管轴线后放支管线，主干管直线段要每隔30m设一标桩，分水转变，变径处应加设标桩，地形起伏变化较大地段，宜根据地形条件适当增设标桩。11.2.3清基挖方根据招标文件及地质报告说明，项目区地势较为平坦，清基工作采用人工。①管沟土方开挖地形平坦开阔，地层由第四系全新冲积层，第四系上更新统冲层组成，局部表覆第四系全新统人工堆积层。第四系全新统冲积层厚度约25～50m，岩性主要为黏土、粉质黏土、粉土、粉砂、细砂；第四系上更新统冲积层厚度大于50m，岩性主要为黏性土、粉土、粉细砂等。管桩深度范围内地层主要为：粉土、黏土、粉质黏土，局部表层为杂填土。couplingCentreshallbechecked,thesecondpouredconcretestrengthofmorethan70%.Intheprocessofreamingorboring,apartfromthespecialprovisionsinfactory,doesnotallowanyworkthatmayaffectthecouplingCentre,suchasirrigation,tocylinderconnectionstofloodthecondenserpipesandsoon.Wellboring,hingeboltholeflangewithcouplingofvertical,notoblique.Mountingboltsshouldbeaddedlubricants,typinggentlywithasmallhammer,nottoolooseortootight,packedtheboltswiththecorrespondingsealscrewholeshouldbemarked.6.4.5.4.2couplingreamedandpairingsisclosetothediameterofboltbearinggoodhingeholes,dressedwithagoodtwocouplingboltsbeforeyoucanmovetherotor,boring-reamingholeinturn.Couplingboltsmustbetightcouplingissymmetricaldiameter,inboring,reaming,twoboltsout.Wellboring,hingeboltholeflangewithcouplingofvertical,notoblique.Duetothecouplingboltsinaccordancewithhingeholescorrespondingtothediameterofthescrewholesonebyoneafterprocessing,processingbackboltinstallationlocationcannotbechanged,soaccordingtoboltaftertheactualweightdifferenceofnutandlockwashertomatch.Generalrequirementsforcouplingtwosymmetricaldiameterbolt,nutandlockwasher'stotalweightdifferenceshouldnotbegreaterthan10gandknocksstampedmark.(SeeFigure18)Thecouplingboltsapplylubricant,andthengentlywithcopperhome,nottoolooseortootight.BoltAssemblyisfinished,symmetricaltighteningallboltsto30%,50%,70%,100%force,andcheckthecouplingflutterandbeforeconnectingthecirclegraduallychangesitsvalueshouldbelessthan0.02mm.Tighteningtorqueofthecouplingboltsshallcomplywiththetechnicalrequirementsmanufacturersdrawings,withadynamometricwrenchorlogtensiontools.Threewheelrotorswingtestcouplingconnectionsshouldbechecked:takingleave,应按施工放线、轴线和槽底设计高程开挖主、支管，管槽的开挖深度为1.2m左右，宽度上口1.5m，下口0.5m，管件安装部位要适当加宽，加宽宽度以施工方便为宜。管槽开挖后要清除管槽底部石块杂物，并依次顺坡整平，严禁起伏，以便冬季排空管内积水。管槽经过岩石、卵石等硬基础处，槽底要控制超挖。清除砾石后再用细土回填夯实至设计高程。开挖土料要堆置于管槽一侧。阀门井开挖要与管槽开挖同时进行。②管沟土方回填管材及管件在安装过程中应在管段无接缝处覆土固定，待安装完毕经冲洗试压，全面检查质量合格后方可回填，回填前应清除槽内一切杂物，排净积水，在管壁四周10cm内的覆土下不能有直径大于2.5cm的砾石，回填应高于原地面以上10cm，并应分层轻夯或踩实，回填必须在管道两侧同时进行，严禁单侧回填。11.2.4PVC—U、PE管材配件程序及施工方法11.2.4.1PVC—U管材、配件到达施工现场后，立即通知现场监理及业主及现场材料人员报请验收并提交产品生产许可证、产品合格证、质量检验合格证、卫生检验合格证等相关文件，提供相应检测工具，如：卡尺、量尺等共同对管材、配件等产品的外形尺寸、管径、壁厚、长度及技术参数进行检验查收，对不合格及假冒伪劣产品严禁进场。11.2.4.2PVC—U管材、配件进场后在装卸过程中严禁抛、摔、滚、拖等野蛮行为，避免油污，不得受到剧烈撞击，尖锐物品碰触，选择现场较平整的场地进行管材及配件的堆放，管材码地形平坦开阔，地层由第四系全新冲积层，第四系上更新统冲层组成，局部表覆第四系全新统人工堆积层。第四系全新统冲积层厚度约25～50m，岩性主要为黏土、粉质黏土、粉土、粉砂、细砂；第四系上更新统冲积层厚度大于50m，岩性主要为黏性土、粉土、粉细砂等。管桩深度范围内地层主要为：粉土、黏土、粉质黏土，局部表层为杂填土。couplingCentreshallbechecked,thesecondpouredconcretestrengthofmorethan70%.Intheprocessofreamingorboring,apartfromthespecialprovisionsinfactory,doesnotallowanyworkthatmayaffectthecouplingCentre,suchasirrigation,tocylinderconnectionstofloodthecondenserpipesandsoon.Wellboring,hingeboltholeflangewithcouplingofv