管井降水施工方案

VATTANACCAPITALLIFESTYLEPARKPROJECT管井降水施工方案Theconstructionschemeoftubewelldewatering-----柬埔寨安达都会广场项目------VCLPPROJECTCAMBODIA编制单位：SinomaHanDanConstructionCo.,Ltd编制：compiled:__________________审批：Verified:__________________批准：Approved:__________________日期：Date:__________________VATTANACCAPITALLIFESTYLEPARKPROJECT安达广场基坑降水施工方案ConstructionSchemeforFoundationPitDrawdownofVATTANACPark一、降水设计方案I.Drawdowndesignscheme1.1、设计参数1.1.Designdata本工程降水井采用直径300mm波纹管滤管，管井共20根井深22米，井口外露500mm。300mmcorrugatedfilterpipeisadoptedasthedrawdownwellandtherearetotal20wellsof22mdeepeach.Thewellheadexposesby500mm.1.2、降水井平面布置1.2.Layoutofdrawdownwell降水井布置详见降水管井平面布置图。Thearrangementofdrawdownwellisshownonthelayoutofdrawdownwell.VATTANACCAPITALLIFESTYLEPARKPROJECT二、施工准备II.Constructionpreparation2.1、测量放线2.1.Surveyingandsettingout测量放线依据现场测量控制点，标高采用水准仪，并根据井点布置图采用全站仪放线定位。放线经复核后报管理公司确认方可进行施工。Thesurveyingandsettingoutshallbebasedonthefieldsurveycontrolpointsandopticallevelshallbeusedformeasuringtheelevation.Inaddition,thetotalstationinstrumentshallbeusedforthesettingoutandpositioningaccordingtothelayoutofwellpoints.Settingoutshallbeperformedafterre-recheckandbeingreportedtothemanagementcompanyforconfirmation.2.2、施工用电、用水配置2.2Electricityandwaterforconstruction1、施工用电直接从配电房接入，50kVA能完全满足降水用电负荷。1.Theelectricityforconstructionshallbedirectlyconnectedfromtheswitchgearroom,and50kVAcanfullymeetthedrawdownloadrequirements.2、依据用水设备和施工经验，需用水量10m3/h直径50mm管，VATTANACCAPITALLIFESTYLEPARKPROJECT就能满足施工用水。2.Dependingonthewaterequipmentandbasedontheconstructionexperience,thepipeofdiameter50mmwithawaterflowrateof10m3/hcanmeettheconstructionrequirements.2.3、打井机械及井点设备2.3.Welldrillingrigandwellpointequipment打井机械可根据工期要求变更。井点设备是由井点管、连接管、排水主管及抽水设备等组成。具体如下:Thewelldrillingrigmayveryaccordingtotheschedulerequirement.Thewellpointequipmentconsistsofwellpointpipe,connectingpipe,drainheaderandpumpingequipment.Thedetailsareasfollows:机械设备表Listofmechanicalequipment序号S/N设备名称EquipmentName规格Size单位Unit数量Qty1钻机DrillingrigXY型XYModel台Set12潜水泵Submergedpump1.1~1.5kw台Set20（备5）20(5standby)3配电箱Powerdistributionbox个Piece12VATTANACCAPITALLIFESTYLEPARKPROJECT4泥浆泵MudpumpDN15台Set15挖机Excavator200Model台Set12.4、抽水设备的型号2.4.Modelofpumpingequipment本工程抽水设备采用潜水泵，功率为1.1~1.5kw、流量为5~8m3/h。口径为25mm。Submersiblepumpisusedaspumpingequipment,forwhichthepoweris1.1~1.5kw,theflowrateis5~8m3/h,andthediameteris25mm.主要材料用量表Listofmainmaterialconsumption序号S/N材料名称Materialname规格Size单位Unit数量Qty1波纹管CorrugatedpipeΦ300m4402滤料Filtermaterial3~5mmt803水管Waterpipem15004电缆Cable3*1.5m1500VATTANACCAPITALLIFESTYLEPARKPROJECT2.5、人员的组织2.5.Organizationofpersonnel1、降水组织机构1.Drawdownorganization项目经理（刘庆科）电话：[phone]技术负责（王春阳）电话：[phone]降水班组钻井班组水电团队现场安全测量班组现场经理（田书峰）电话：[phone]VATTANACCAPITALLIFESTYLEPARKPROJECT三、施工工艺III.Constructiontechnology降水井施工工艺流程Theworkflowofdrawdownwellconstruction放线→定井位钻机就位→钻井→换浆→吊放井管→填滤料→粘土封井→洗井→安装水泵、架设电缆→铺设排水总管及沉砂池→抽降→水位观测→封井Settingout→positioningofwelldrillingrig→welldrilling→mudfluiddisplacement→liftingofwellpipe→filtermaterialfilling→shut-inwellwithclay→wellflushing→installingwaterpumpandcable→layProjectmanager（LiuQingKe）tel：[phone]Technicalrepresentative（WangChunYang）tel：[phone]DrawdownteamDrillingteamWater&electricityteamSitesafetySurveyteamSitemanager（TianShuFeng）tel：[phone]VATTANACCAPITALLIFESTYLEPARKPROJECTdrainheaderandsedimentationtank→drawdownbypumping→opticallevelobservation→wellshut-in1、测量定位1.Surveyandpositioning按施工图放出井的中心点。井位应设立显著标志，必要时用钢纤打入地面以下300mm，并灌石灰粉作标记。Markoutthecenterpointofthewellaccordingtotheconstructiondrawing.Acleardistrictsignshallbeerectedatthewellpositionandasteelrodshallbedrivenby300mmunderthegroundifnecessary.Inaddition,limepowdershallbepouredasmarker.2、钻孔定位2.Locationofdrillhole以定好的井位点为中心，500mm为直径作圆，向下开0.40m作为井口。深度以见原状土为准，确认无地下管线及地下构筑物后放护筒，护筒外侧填粘土封隔好表层杂填土，以防钻井冲洗液漏失。Takingthewelllocationasthecenter,makeacircleofdiameter500mmandcuta0.4mopeningdownward.Thedepthshallbesuchthatreachingtheundisturbedsoil.Theretainingcylindershallbelaidafterconfirmingthereisnoundergroundpipelineandstructure.Theoutsideofretainingcylindershallbefilledwithclaytoisolatethemiscellaneousfillatthesurfacelayer,soastopreventtheleakageofdrillingfluid.3、桩机就位VATTANACCAPITALLIFESTYLEPARKPROJECT3.Piledriverpositioning桩机就位时需用水准仪找平，做到稳固、周正、水平，以保证钻进过程中的钻机稳定。起落钻塔必须平稳、准确。钻机就位偏差应小于10mm，钻塔垂直度偏差应小于1%。Forpositioningofpiledriver,opticallevelshallbeusedforleveling.Itshallbestable,regularandhorizontal,soastoensurethestabilityofthedrillingriginthedrillingprocess.Theliftingandloweringofdrillingtowermustbestableandaccurate.Thedeviationofdrillingrigpositioningshouldbelessthan10mmandtheverticalitydeviationofthedrillingtowershallbelessthan1%.4、造浆：4.Mudmaking:根据地层情况采用正循环钻方法成孔，一般采用地层自造浆护壁。当遇到砂层时，采用膨润土（保持泥浆比重为1.1-1.15g/cm3）造浆护壁成孔。地层土质松散时，孔内泥浆应高于地面。Accordingtothestratumlayer,normalcirculationdrillingmethodshallbeusedforboreforming.Normally,thenativemudisusedforwallretaining.Whensandlayerisencountered,bentoniteshallbeusedformud(keepingthemudweightis1.10~1.15.)makingandboreforming.Whenthesoilisloose,themudinsidetheboreshallbehigherthanthegr