轻型井点降水方案

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ShanghaiLianhengIsocyanateCompanyLimited.SLICcMDI2PROJECTMDI上海联恒异氰酸酯有限公司MDI扩建项目文件编号FilesNo：CMDI-CP02-MS-0008版本Rev：1页：19/20文件编号FilesNo.CMDI-CP02-MS-0008密别IPGrade限制使用RestrictedShanghaiLianhengIsocyanateCompanyLimited.SLICcMDI2PROJECTMDI上海联恒异氰酸酯有限公司MDI扩建项目LightWellPointofDewateringPlan轻型井点降水施工方案版本Rev.编制Preparedby审核Reviewedby批准ApprovedbyChinaNuclearIndustry23ConstructionCo.,Ltd中国核工业二三建设有限公司 ShanghaiLianhengIsocyanateCompanyLimited.SLICcMDI2PROJECTMDI上海联恒异氰酸酯有限公司MDI扩建项目文件编号FilesNo：CMDI-CP02-MS-0008版本Rev：1页：19/20修改页版本Rev.修改日期Modificationdate状态Status编写Preparedby审核Reviewedby批准Approvedby修改说明Modification ShanghaiLianhengIsocyanateCompanyLimited.SLICcMDI2PROJECTMDI上海联恒异氰酸酯有限公司MDI扩建项目文件编号FilesNo：CMDI-CP02-MS-0008版本Rev：1页：19/20目录1．projectoutline工程概述12．MaterialRequirements材料要求13MainMechanicalEquipmentsandTools主要机具设备24OperationConditions作业条件35ConstructionOperationTechnics施工操作工艺36Qualitycontrolofdewatering降水质量控制97Protection成品保护108Safetymeasures安全措施119Notice施工注意事项12 ShanghaiLianhengIsocyanateCompanyLimited.SLICcMDI2PROJECTMDI上海联恒异氰酸酯有限公司MDI扩建项目文件编号FilesNo：CMDI-CP02-MS-0008版本Rev：1页：19/201．projectoutline工程概述TheprojectislocatedinSCIP,eastofthelianheroad,northofnanheRoad,westofchuhuaroad,southofshengongroad,thediveofdivepartsoillayerismainlycloselyrelatedwiththeprojectconstruction.itsmainsupplysourcearemeteoricwatersandsurfacerunoff,stablewaterdepthofsubsurfacedivingis1.0meters～1.4meters.本项目位于上海化学工业区内，联合路以东、南河路以北、楚华路以西、神工路以南的区域。与本工程建设密切相关的主要为潜部土层中的潜水，其补给来源主要为大气降水与地表径流，地下潜水稳定水位埋深为1.0米～1.4米。Consideringthelocalsoiltextureconditions,fortheconvenienceofthesuccessfuldeveloping,andtoimprovethestabilityofearthslopeexcavationtoavoidthesandflowing,wedecidetousethewayoflightwellpointdewatering.结合土质情况，为了便于本工程的顺利开展，提高土方开挖基坑边坡的稳定性防止流砂现象的发生，采用轻型井点降水的方法。Thelightwellpointsystemis,thatthepipeshallbesetandembeddedintotheaquiferoutsidethefoundationpit,thetopofthewellpointpipecombineswiththecollectormainpipethroughtheconnectingbendpipe,whilethecollectorpipecombineswiththevacuumpumpandthecentrifugalpump,startthepumpingequipment,theundergroundwaterwillflowacrossthefilterpipetothesuctionofvacuumpump,thenintothewellpointpipeandthecollectormainpipe,afterexhaustair,thenrunofffromthedrainpipeofthecentrifugalpumptolowertheundergroundwaterleveltothebottomofthefoundationpit.Theadvantageisthat,it’seasytouse,installanddismantlethesimplethemechanicalequipmentandtools,andcanhavebetterresultindewatering.轻型井点系在基坑外围埋设井点管深入含水层内，井点管的上端通过连接弯管与集水总管连接，集水总管再与真空泵和离心水泵相连，启动抽水设备，地下水便在真空泵吸力的作用下，经滤水管进入井点管和集水总管，排出空气后，由离心水泵的排水管排出，使地下水位降到基坑底以下。其优点是机具设备简单，使用灵活，装拆方便，降水效果好的特点。2．MaterialRequirements材料要求2.1Wellpointpipe井点管Usethesteelpipe(D=50mm)whosebottomisweldedbysteelplatewiththethicknessof4.0mm,andat2mawayfromthebottom,borequincuncialholes(D=10mm)withthespacingof20mm,armourthebottomwithonenylonwindowscreen,thenusewire ShanghaiLianhengIsocyanateCompanyLimited.SLICcMDI2PROJECTMDI上海联恒异氰酸酯有限公司MDI扩建项目文件编号FilesNo：CMDI-CP02-MS-0008版本Rev：1页：19/2010#towrapitwiththeequalspacingof200mm.用直径50mm钢管，下端用厚为4.0mm钢板焊死，下段长2m的范围内钻10mm的圆孔，间距20mm，梅花形钻孔。外包尼龙窗纱一层，10号铁丝缠裹、铁丝间距200mm。2.2Connectingpipe连接管Usethespringplastictubewithadiameterof55mm,installajointonthetop.使用弹簧塑料管，直径55mm；端部装接头。2.3Collectorbranch/mainpipe集水支/总管Eachsetofbranchpipe(D=50mm)shouldbeconnectedwiththecollectormainpipe(D=100mm).每套集水支管用直径50mm钢管；最后连接入100mm钢管的集水总管。2.4Filtermaterial滤料Coarsesand(D≤2.0mm),whosesiltcontentislowerthan5%.粒径≤2.0mm粗砂，含泥量小于5%。3MainMechanicalEquipmentsandTools主要机具设备Becauseofthedifferenttypesofthewaterpumpingsets,therearetwotypesoflightwellpointstochooseaccordingtothegroundwaterlevelofthefoundationpitafterdewateringduringtheconstruction,onevacuumpumplightwellpoint(SeeTableIasfollowing),theotherejectorpumplightwellpoint(SeeTable2asfollowing).本工程选用喷射泵轻型点井降水设备，详见下表。SpecificationandPerformanceoftheEquipmentofEjectorPumpLightWellPointSystemJSJ-60喷射轻型井点设备规格及技术性能Pump名称Qty数量TypeandPerformance型号及技术性能Remarks备注Centrifugalpump离心泵30Type型号：Flux流量：Pumplift扬程：3BL-945m3/h32.5mElectromotor电动机30Type型号：JO2-42-2Power功率：7.5kWEjectorpump喷射泵2Nozzle喷嘴：50㎜Degreeofvacuum空载真空度：100kPaWaterflow工作水流量：45m3/hDimension尺寸：D600㎜×1350㎜Watertank水箱2 ShanghaiLianhengIsocyanateCompanyLimited.SLICcMDI2PROJECTMDI上海联恒异氰酸酯有限公司MDI扩建项目文件编号FilesNo：CMDI-CP02-MS-0008版本Rev：1页：19/202OperationConditions作业条件4.1Thedewateringscheduledependsonthegeologicalprospectingdata,thedepthoftheundergroundwaterlevel,permeabilitycoefficientandthesoiltexturedistribution.根据地质勘探数据、地下水位深度、土层的渗透系数和土质分布确定降水方案。4.2Thefoundationconstructiondrawingsshallbewellpreparedtoconfirmthegroundwaterlevelafterdewateringaccordingtothesub-baselevel.基础施工图纸齐全，便于根据基层标高确定降水深度。4.3Havepreparedtheconstructionandorganizedtodesign,andconfirmedthefollowings:theslopeexcavation(Battersshallbesteeperas1horizontalto1vertical),wellpointlocation,quantities,observationorientation,andpumproomlocation,andsurveythelocation.已编制施工组织设计，确定基坑开挖放坡（按照1:1设置）、井点布置、数量、观测井点位置、泵房位置等，并测量定位。4.4Alltheutilityareready,therearesomesempiternaldrains.现场三通一平工作已完成，存在已设置和已形成的部分永久排水沟(系统)。4.5Thewellpointpipesandequipmentsarepurchasealready,thematerialshavebeenpreparedwell,andtheprocessingandassembles.井点管及设备已购置，材料已备齐，完成加工和配套。3ConstructionOperationTechnology施工操作工艺5.1Wellpointdisposal井点布置5.1.1Waterinflowquantitycalculation涌水量Q计算1)Foundationpitpresumptiveradius基坑引用半径x0：x0=√(A/π)A—Foundationpitflatarea基坑平面面积㎡2)Permeabilitycoefficient渗透系数k：Assumek=1byexperiencesincethemainsoilhorizonissiltysoilafterinvestigation.经查，本区域内砂质粉土为主要土层，取经验值k=13)Radiusaffectedbypumpingwater抽水影响半径R：R=2s√(Hk)s—Dewateredlengthofthelevel水位降低值mH—Thicknessoftheaquifer含水层厚度4)Waterinflowquantitycalculation涌水量Q：Q=1.366k(2H-s)s/(㏒R-㏒x0)or ShanghaiLianhengIsocyanateCompanyLimited.SLICcMDI2PROJECTMDI上海联恒异氰酸酯有限公司MDI扩建项目文件编号FilesNo：CMDI-CP02-MS-0008版本Rev：1页：19/20Q=Lk(H2-h2)/RH—Thethicknessofdivingaquifer潜水含水层厚度；s—Dewateredlengthofthewellpointlevel井点水位降低值(m)；l—Lengthofwaterenteringthefilterpipe过滤管进水部分长度m。5.1.2Wellpointquantitiesandspacing井点管数与间距1)Wellpointquantities井点管数量n：N=mQ/qm—Assurancecoefficient保证系数，取1.1；q—outletforthesinglewellpoint单根井点管出水量(一般30~60m3/day)。2)Spacingofthewellpointpipes井点管间距D：D=2(L+B)/(n-1)L、B—LengthandBreadthofthewellpointsystem矩形井点系统的长度和宽度(m)。3)WellpointpipeembeddedHeight井点管埋设深度H：H=Hl+h+iL+lNotice:H1—thedistancebetweenthewellpointpipeembeddingsurfaceandthebottomofthefoundationpit.其中：井点管埋设面至基坑底面的距离(m)；h—Thesafetydistancebetweenthedeepestexcavationsurfaceinthecenterofthefoundationpitandthehighestpointofthedewateringcurve.Assumeh=0.5m.基坑中央最深挖掘面至降水曲线最高点的安全距离(m)，取h=0.5m；L—Thedistancebetweenthecenterofthewellpointpipeandthecenteroffoundationpit.井点管至基坑中心的短边距离(m)；i—Inclineofthedewateringcurve降水曲线坡度，取i=1/10~1/15；l—Lengthofthefilterpipe滤管长度(m)。5.1.3Parameters参数选择计算k=1,assumethethicknessofaquiferis15m,thencalculatethewellpointspacing,theembeddeddepthofwellpointpipe,moredetailsasfollowing(Consideringthedewatereddepthis1.75mand2.5m).以A440A441、A443计算，当选择k=1、含水层厚度假定为11m时，计算得到点井间距、点井管埋设深度等参数，结果如下表，按照降水深度1.75m和2.5m考虑。 ShanghaiLianhengIsocyanateCompanyLimited.SLICcMDI2PROJECTMDI上海联恒异氰酸酯有限公司MDI扩建项目文件编号FilesNo：CMDI-CP02-MS-0008版本Rev：1页：19/20LightWellPointofDewateringParameterList轻型点井降水选用参数表NO序号Parameter参数名称Formula计算式Singlepointwell单排点井AnnularwellpointplanI环形点井方案一AnnularwellpointplanII环形点井方案二1k渗透系数K=1　　2x0基坑引用半径x0=√(A/π)-10.885.59　3R抽水影响半径R=2s√(Hk)-11.6116.584Q涌水量Q=1.366k(2H-s)s/(㏒R-㏒x0)-　1728.84141.69Q=Lk(H2-h2)/R-　5N井点管数N=mQ/q-4356D井点管间距D=2(L+B)/(n-1)-3.210.17H井点管埋设深度H=Hl+h+iL+l-3.84.7　　　　　Fromthecalculatedresultandtheattachedplan,therearethreeplanstochoose:依据上述计算结果，基坑/基槽开挖轻型点井降水方案选择如下：1)plan1issuitableforfoundationexcavationrainfallthatissquare,rectangular,orsimilarlyshapedfoundationexcavationwithin1.75m.suchasA440A441,A442,A444A445,A446,A450,A454andothersuitableponds,excavationrainfalletcs'wellspacingofbuildingfoundationexcavationrainfallis1.8m,pointwellpipelayingdepthis4m;方案一适用于降水深度1.75m以内、方形、矩形、或者类似形状的基础开挖降水。如A440A441、A442、A444A445、A446、A450、A454以及其他适合水池、建筑物基础的开挖降水等井间距为1.8m、点井管埋设深度4m；2)planIIissuitableforfoundationexcavationprecipitationlthatissquare,rectangular,orsimilarlyshapedfoundationexcavationwithin2.5m.suchasA440pool,A443,A453,andothersuitableponds,excavationprecipitationofbuildingfoundation.settingwellpointsinannulus,wellspacingis1.8m,thelayingdepthofpointwellpipeis5m.firstlyA440excavatestotheraftfoundationpiletopelevationabove50cmparts,aftersteelsheetpileconstructioniscomplete,setwellpointrainfallaroundpondstodoprecipitation.方案二适用于降水深度在2.5m以内、方形、矩形、或者类似形状的基础开挖降水。如A440水池、A443、A453、以及其他适合水池、建筑物基础的开挖降水等。环形布设点井，井间距1.8m、点井管埋设深度5m。其中A ShanghaiLianhengIsocyanateCompanyLimited.SLICcMDI2PROJECTMDI上海联恒异氰酸酯有限公司MDI扩建项目文件编号FilesNo：CMDI-CP02-MS-0008版本Rev：1页：19/20440先开挖至筏板基础桩顶标高以上50cm部位，钢板桩施工完毕后，在水池四周设置井点管降水进行降水。5.1.4Disposalofwellpointdewatering基槽/坑井点降水布置方案Itdependsontheshapeandthedimensionofthefoundationpit,thegeologicalandhydrologicalconditions,theworktype,groundwaterlevelafterdewateringandsoon.Setthesinglerowwellpointinupstreamoftheundergroundwaterwhenthewidthofthefoundationpitisnomorethan6m;setthetworowswellpointatthetwosideoffoundationpitwhenthegroundwaterlevelafterdewateringismorethan6morthegeotechnicconditionisnotsogood,andwhenthepermeabilitycoefficientisbigger;whenthebottomofthefoundationpitislarge,setwellpointcircularlywiththespacingof1.2mto2.0m(Fortheconvenienceofeasyaccessfortheexcavationequipment,setasideapathwiththespacingof4m),andthedistancefromthewellpointpipetothewallofthepitshouldbenolessthan1meter.Theembeddeddepthdependsonthegroundwaterlevelafterdewateringandtheaquiferlocation,wherever,thepipeshallbeembeddedintheaquifer,andthegroundwaterlevelafterdewateringshallbenolessthan50cmunderthebasement(Seeattached).采用环形井点，井点间距1.2～2.0m，（为方便挖土设备进出，该环形井点可不封闭，留出一间距达4m的通道），井点管距坑壁不小于1.0m。埋深根据降水深度及含水层位置决定，但必须埋入含水层内，降水深度在基底下不小于50cm（详见附件）。Theprojectexcavationdepth:A440A441excavationdepthis2.25m,localpondexcavationdepthis5.9m,A444A445excavationdepthis2.17m,A476i(N)excavationdepthis1.9m,A440,A441,A444,A445,A476i(N)overallactsasaprecipitationarea,theheaderpipearrangementofwellpointprecipitationis754.8m,A442excavationdepthis1.18m,theheaderpipearrangementofwellpointprecipitationis86m,A443excavationdepthis3m,theheaderpipearrangementofwellpointprecipitationis54m,A446excavationdepthis1.3m,theheaderpipearrangementofwellpointprecipitationis49m,A450excavationdepthis2.1m,A476i(S)excavationdepthis1.9m,A450,A476i(S)actsasaprecipitationarea,theheaderpipearrangementofwellpointprecipitationis520m,A453excavationdepthis2.95m,theheaderpipearrangementofwellpointprecipitationis47m,A454A455excavationdepthis1.81m,theheaderpipearrangementofwellpointprecipitationis280m,piperackexcavationdepthis1.9m,theheaderpipearrangementofwellpointprecipitationis548m.theheaderpipetotalarrangementofwellpointprecipitationis2338.8m.forwellprecipitationplanarrangement,seeattacheddrawingsindetail.本工程开挖深度：A440A441开挖深度2.25m，局部水池开挖深度5.9m，A444A445开挖深度2.17m，A476i（N）开挖深度1.9m，A ShanghaiLianhengIsocyanateCompanyLimited.SLICcMDI2PROJECTMDI上海联恒异氰酸酯有限公司MDI扩建项目文件编号FilesNo：CMDI-CP02-MS-0008版本Rev：1页：19/20440、A441、A444、A445、A476i（N）整体作为一个降水区域，井点降水总管布置754.8m，A442开挖深度1.18m，井点降水总管布置86m，A443开挖深度3m，井点降水总管布置54m，A446开挖深度1.3m，井点降水总管布置49m，A450开挖深度2.1m，A476i（S）开挖深度1.9m，A450、A476i（S）作为一个降水区域，井点降水总管布置520m，A453开挖深度2.95m，井点降水总管布置47m，A454A455开挖深度1.81m，井点降水总管布置280m，管廊开挖深度1.9m，井点降水总管布置548m。井点降水总管总计布置2338.8m。单元内部设井点管的，如与地下基础、梁冲突，将其拆除在周围设置，通常降水设备一直持续到回填阶段，筏板基础区域将井点管设置在四周，不影响基础施工。井点降水平面布置详见附图。5.2ConstructiontechnologyofWellpointpipe井点管施工工艺 ShanghaiLianhengIsocyanateCompanyLimited.SLICcMDI2PROJECTMDI上海联恒异氰酸酯有限公司MDI扩建项目文件编号FilesNo：CMDI-CP02-MS-0008版本Rev：1页：19/205.3Embeddingofthewellpointpipe井点管埋设Drillholes(D=300mm)byhydraulicgiant,theactualdepthofthewellis50cmdeeperthandesigned;putthewellpointpipeintothecenterofthewellbymanpowerandleft200mmoutside,thenputthecoarsesand(D=2~4mm)evenlyaroundthepipe,sealthetop(Depth=1.0m)withclaytoavoidleak.用高压水枪冲击成孔，孔径为300mm，实际井深比井点设计深50cm；用人工方式将井点管徐徐插入井孔中央，顶端露出地面200mm。然后沿井点管四周均匀倒入2～4mm粒径粗砂，上部1.0m深度内，用粘土填实以防漏气。5.4Mainpipeconnection总管连接Wellpointpipeshallconnectthemainpipeafterembedding.Themainpipesareset50cmawayfromthewellpoints,excavateandlevelatrenchbeforepipeinstallation,thenputthepipealignedintothetrench,installtheboltontheflange,addtherubberseal,thentightentheflangebolt,sealtheendofthemainpipewithflange.Oncethemainpipeswerelaidalready,connectthewellpointpipeandthemainpipewithwatersuctionhose,wrapitwith8#wire.Thenconnectthepipeassemblywithwatersuctionequipment,andconnectthesupplypowertohavethewaterpumpingtesttochecktheleakageandsilting,ifanyabnormalsituations,itcannotbeusedunlesscorrectiveactionshasbeentaken,takepressuremeterforexample,itcannotbeusedunlessthatthepressurereadingischangedbetween0.15MPaand0.20MPa,andthatthedegreeofvacuumexceeds93.3KPa,whichmeansthereisnoproblemfortheconnection.井点管埋设完毕应接通总管。总管设在井点管外侧50cm处，铺前先挖沟槽，并将槽底整平，将配好的管子逐根放入沟内，在端头法兰穿上螺栓，垫上橡胶密封圈，并拧紧法兰螺栓，用法兰封牢总管端部。一旦井点干管铺好，用吸水胶管将井点管与干管连接，并用8号铁丝绑牢。一组井点管部件连接完毕后，与抽水设备连通，接通电源，即可进行试抽水，检查有无漏气、淤塞情况，出水是否正常，如有异常情况，检修后方可使用，如压力表读数在0.15～0.20MPa，真空度在93.3kPa以上，表明各连接系统无问题，即可投入正常使用。5.5Drainofthewellpoint井点排水Whenthewellpointswork,keeppumpingcontinually,andpreparedtwopowersuppliestoavoidthepowercut.Generally,thewaterlevelwillbestableafterthreetofivedays.Whendewatering,keepsurveyingthelevelofbuildingsinthisarea,oncelandsubsidenceorhorizontaldisplacement,takeprotectiveactionatonce. ShanghaiLianhengIsocyanateCompanyLimited.SLICcMDI2PROJECTMDI上海联恒异氰酸酯有限公司MDI扩建项目文件编号FilesNo：CMDI-CP02-MS-0008版本Rev：1页：19/20井点使用时，应保持连续不断抽水，并配用双电源以防断电。一般抽水3～5天后水位降落漏斗基本趋于稳定。井点降水时，应对水位降低区域内的建筑物进行沉降观测，发现沉陷或水平位移过大时，应及时采取防护措施。5.6Dismantleofwellpoint井点拆除BackfillafterfinishingthefoundationandtheU/Gbuilding,or,thewellpointcannotbedismantledunlessthebackfillingexceedthe50cmoftheundergroundwaterlevel.Usethechainhoistorscissorsliftertopulloutthewellpoint,andfilltheholeswithsandorsoil.基础和地下构筑物完成回填土并验收合格后，方可拆除井点系统。可借助于倒链或杠杆式起重机来拔出井点，所留孔洞用砂或土堵塞。2Qualitycontrolofdewatering降水质量控制6.1组织机构Projectmanager项目经理尹波Constructionmanager施工经理常志强Qualityengineer质量工程师路琴Materialengineer材料工程师胡刚强Foreman工长Qualitymanager质量经理陈晓川Projectmanager土建工程师蒲文辉 ShanghaiLianhengIsocyanateCompanyLimited.SLICcMDI2PROJECTMDI上海联恒异氰酸酯有限公司MDI扩建项目文件编号FilesNo：CMDI-CP02-MS-0008版本Rev：1页：19/206.2Therearedewateringbeforeconstruction.Whendewateringoutsidethefoundationpit,estimatetheprecipitationandmonitorthelevelofimportantbuildingandpublicfacility.Precipitationinfluenceradiusis16.58m,setupmonitoringpointsonbothsidesoftheeastandwestroad,measuringislessthan2timesbeforeprecipitation,inperiodofprecipitationbeginningandreachingthedesignprecipitationdepth,theobservationisonceaday,observationisonceevery2-5dafterreachingprecipitationdepth,untildeformationinfluencingstabilizationorprecipitationfinish.施工前应有降水设计。当在基坑外降水时，应有降水范围的估算，对重要建筑物公共设施在降水过程中应监测。降水影响半径为16.58m，在东西两侧道路上设置监测点，降水之前测量不少于2次，降水开始至达到设计降水深度期间，每天观测1次，达到降水深度后每2-5d观测一次，直至变形影响稳定或降水结束为止，并在观测作业后24h内提交监测数据报告。6.3Thespacingofthepipesandtheembeddeddepthshallmeettherequirementsofdesigning.Thedegreeofthevacuumforeachsetsystemofwellpointsshallexceed60KPa,andthepressurereadingshallkeep0.16MPa.井点管间距、埋设深度应符合设计要求。各组井点系统的真空度应保持在60kPa以上，压力应保持在0.16MPa。6.4Afterthedewateringconstruction,onetestfortheperformanceofwellpointpipeisneeded,oncetheydonotwork,takecorrectiveactionstorecover,ifitisimpossibletorecover,justdiscardthemandsetnewpipes.降水系统施工完后，应试运转，如发现井管失效，应采取措施使其恢复正常，如无可能恢复则应报废，另行设置新的井管。6.5Keeponobservingthelevelrandomlyduringthedewatering.waterlevelfalltounderfoundationditchbottom50cm降水系统运转过程中应随时检查观测孔中的水位。水位降到基槽底50cm以下，再进行开挖。2Protection成品保护7.1Aftertheholeshaping,putthemintothepipeatonceandfillthefiltermaterial.Ifitnot,sealtheholewith井点成孔后，应立即下井点管并填入滤料，以防塌孔。不能及时下井点管时，孔口应盖盖板，防止物件掉入井孔内堵孔。7.2Afterembeddingthepipe,thespoutshallbechockedupwithtampiontoavoidobstacles. ShanghaiLianhengIsocyanateCompanyLimited.SLICcMDI2PROJECTMDI上海联恒异氰酸酯有限公司MDI扩建项目文件编号FilesNo：CMDI-CP02-MS-0008版本Rev：1页：19/20井点管埋设后，管口要用木塞堵住，以防异物掉入管内堵塞。7.3Keeppumpingcontinuallywhenusingthewellpoint,andpreparepowersupplytostandbytoavoidobstacles.井点使用应保持连续抽水，并设一备用电源，以避免泥渣沉淀淤管。2Safetyaction安全措施8.1HSEmanagementprocedureHSE管理程序TheHSEmanagementprocedureisestablishedandcompletedaccordingtotherequirementsofmanagementcompany,clientandourselves,anditcoversthesafetymanagementworkandtheactualdemand,includingtraining,preventiveactions,supervision,instruction,execution,analysis,reportandsoon,submittotherelativedepartmentaccordingtoDocumentControlProcedure.项目部根据管理公司、业主、企业自身等各方要求，建立和完善了本工程的HSE管理程序，HSE程序文件的内容覆盖了本项的安全管理工作和实际需要，包括培训、预防、监督、指导、执行、分析、报告等，通过《文件控制程序》递交有关部门。8.2SafetyNotifications安全事项要求(1)EachonetakingpartinthewellpointofdewateringshallfollowtheHSErequirements,andfollowtheactionsandmethodsdescribedinJSAoftheProject.参与井点降水作业人员，必须完全遵守本工程项目各方的HSE要求，遵照项目经理部的JSA文件中所需要采取的措施、方法。(2)Educateemployeewithsafetyisthefirst,andpreventionisveryimportant.Instaurationfulltimesafetyperson,andprocessingsafetyinspectionandsafetyeducationbeforestartingworkofeveryday.教育职工树立“安全第一，预防为主”的安全意识。设立专职安全员，实行安全值班制，每天上班前进行安全检查、安全教育。(3)Setobvioussafetysignplateinconstructionsite.施工现场要有醒目的安全标志牌。(4)Beforetheholesenterthewellpoints,itmustbesealedbytheblindpatchtoavoidaccidentorsoilentered.已成孔的尚未下井点前，井孔必须使用盖板封严，以免掉土或发生人员安全事故。(5)Eachsupervisorshallbeindividuallyresponsiblefortheirelectromechanicalequipment,onemachineonevalve,followtherequirementofgroundingandzeroterminating,andinstallleakageprotector.Allthefollowingsshallbewaterproof,switchbox,connectorandthesocket.Whenmaintainthewaterpumpandassemblies,thepowershallbecutoff,andhot-lineworkprohibited. ShanghaiLianhengIsocyanateCompanyLimited.SLICcMDI2PROJECTMDI上海联恒异氰酸酯有限公司MDI扩建项目文件编号FilesNo：CMDI-CP02-MS-0008版本Rev：1页：19/20各机电设备应由专人看管，电气必须一机一闸，严格接地、接零和安漏电保护器。配电箱/接头/插座使用防水标准的产品。水泵和部件检修时必须切断电源，严禁带电作业。(6)Allconstructionequipmentinsitemusthavewholeguardsuchasshield,protectionmeshbysafetyinspected进场施工的机械设备，必须有完整的防护装置如防护罩、防护网等，经安全检查合格后方可使用。(7)Constructionequipmentandelectricalfacilitymustbeinchargebyappointedperson,prohibitnon-operationpersonoperatetoremoveandinstall.施工机械和电气设备设专人管理，非操作人员不得擅自操作和拆装。(8)Mustshutswitchoffthepowersupplywhenmovingorexamineelectricalequipment,strictlyprohibitpeccancywork.Prohibitoperatorworkinwaterwhenseweragerunning;maintainequipmentinaperiodoftime,.移动、检修电器设备必须切断电源，严禁违章作业；排水设备运转时作业人员不得涉水操作；定期对设备进行维修保养，不得带病运转。(9)Leaveallelectricalconnectiontotrainedandqualifiedelectrician.电工等特殊工种，必须经考核合格后，持证上岗。2Notice施工注意事项9.1Whendrillingholes,ifanyobstacles,keepthelocationofwellpointblank,drillnextone.Thefilterpipeofthewellpointpipeshallbeembeddedundertheaquifer.成孔时，如遇地下障碍物，可以空一井点，钻下一井点。井点管滤水管部分必须埋入含水层内。9.2Oncethewellpointshavebeenputintouse,thepumpcannotstoptoavoidthewaterlevelrisingandthefoundationpitflooded,generally,therearetwocircuitpowersupplyorelectricalmachinetostandby.井点使用后，中途不得停泵，防止因停止抽水使地下水位上升，造成淹泡基坑事故，一般应设双路供电，或备用一台发电机。9.3Whenusingthewellpoint,itisnormalthatthehighwaterearlierandthelowwaterlater,themuddywaterearlierandthecleanwaterlater,ifthereisnowater,orthereisalwaysmuddywater,orthemuddywaterfollowsthecleanwater,stopusingandcheckatonce.Generally,thedegreeofvacuum,awaytocheckthewellpointsystem,shallbenotlowerthan60KPagenerally,ifnot,itmeanstheleakagehappens,andthepipeshouldbemaintainedatonce.Ifanyobstaclesinthepipe,itcanbeconfirmedthroughthefollowingsimplemethods:listeningtothewater,feelingalittlevibrationofthepipe,thedifferenttemperatureofthepipeinsummerandwinterandsoon.Ifthere ShanghaiLianhengIsocyanateCompanyLimited.SLICcMDI2PROJECTMDI上海联恒异氰酸酯有限公司MDI扩建项目文件编号FilesNo：CMDI-CP02-MS-0008版本Rev：1页：19/20ispoorperformanceofthepipebecauseofmuchobstacle,flushthepipewithhighpressurewaterrepeatedlyorpullthemoutandre-embedded.井点使用时，正常出水规律是“先大后小，先混后清”，如不上水，或水一直较混，或出现清后又混等情况，应立即检查纠正。真空度是判断井点系统是否良好的尺度，一般应不低于60kPa，如真空度不够，表明管道漏气，应及时修好。井点管淤塞，可通过听管内水流声，手扶管壁感到振动，夏冬季手摸管子冷热等简便方法检查。如井点管淤塞太多，严重影响降水效果时，应逐个用高压水反复冲洗井点管或拔出重新埋设。9.4Afterearthexcavation,keeptheunderwaterlevel500mmdeepunderthesub-gradetoavoidtheunderwatertroublingthefoundationsoil.在土方开挖后，应保持降低地下水位在基底500mm以下，以防止地下水扰动地基土体。9.5pumpingwaterisdischargedintoCNIHuaxingaresedimentationbasininanorganizedway.抽出的水有组织的排放到中核华兴区域沉淀池中。 ShanghaiLianhengIsocyanateCompanyLimited.SLICcMDI2PROJECTMDI上海联恒异氰酸酯有限公司MDI扩建项目文件编号FilesNo：CMDI-CP02-MS-0008版本Rev：1页：19/20Attachment1 ShanghaiLianhengIsocyanateCompanyLimited.SLICcMDI2PROJECTMDI上海联恒异氰酸酯有限公司MDI扩建项目文件编号FilesNo：CMDI-CP02-MS-0008版本Rev：1页：19/20 ShanghaiLianhengIsocyanateCompanyLimited.SLICcMDI2PROJECTMDI上海联恒异氰酸酯有限公司MDI扩建项目文件编号FilesNo：CMDI-CP02-MS-0008版本Rev：1页：19/20 ShanghaiLianhengIsocyanateCompanyLimited.SLICcMDI2PROJECTMDI上海联恒异氰酸酯有限公司MDI扩建项目文件编号FilesNo：CMDI-CP02-MS-0008版本Rev：1页：19/20 ShanghaiLianhengIsocyanateCompanyLimited.SLICcMDI2PROJECTMDI上海联恒异氰酸酯有限公司MDI扩建项目文件编号FilesNo：CMDI-CP02-MS-0008版本Rev：1页：19/20 ShanghaiLianhengIsocyanateCompanyLimited.SLICcMDI2PROJECTMDI上海联恒异氰酸酯有限公司MDI扩建项目文件编号FilesNo：CMDI-CP02-MS-0008版本Rev：1页：19/20 ShanghaiLianhengIsocyanateCompanyLimited.SLICcMDI2PROJECTMDI上海联恒异氰酸酯有限公司MDI扩建项目文件编号FilesNo：CMDI-CP02-MS-0008版本Rev：1页：19/20 ShanghaiLianhengIsocyanateCompanyLimited.SLICcMDI2PROJECTMDI上海联恒异氰酸酯有限公司MDI扩建项目文件编号FilesNo：CMDI-CP02-MS-0008版本Rev：1页：19/20Attachment2SafetyAnalysisofDailywork工作安全分析表No.序号Activity/OperationtoBePerformed施工工作程序HazardAssociatedwiththeActivityorOperation与施工工作或者操作有关的危害Safeworkplan&action安全工作方案和措施0General总则ManpowerInjure人员伤害Safetytrainingbeforeworkingbadges签发工作证前进行安全培训1Usesmallmanualtool使用小型手动工具Handinjure手的伤害Weargloves戴手套2Usehighpressurewaterjet使用高压水枪Hitinjure冲击伤害Eyeinjure眼睛的伤害Safetyeducation/onthejobtrainingbeforeuse安全教育/在使用前的班前教育Watersprayshallnotdirectedperson冲水口不得对准人Usefaceshield使用面罩3Constructionequipmentunloadfromlongtrailer施工设备从拖车上卸下来Equipmentloosebalance&topple设备失去平衡或侧翻Signalerwithwhistle&givedirectionsduringunloading信号指挥工，配戴哨子，装卸中正确指挥方向4MachineryExcavation机械开挖Backofexcavationcollapse挖土塌方Slope1:1providedafterexcavationcompleted挖土放坡1:15Electricalcable用电电缆ElectricShock触电Cablebroken电缆破损PurchasequalifiedDBandcable,equipindustryreceptaclesystem配备符合要求的电箱和电缆,配备工业插座Cableburiedorsupported电缆埋地或架空Qualifiedelectricianinspect专业电工检查InspectionbeforemobilizationbyTEC电器设备进场接受东洋检查