復合土工膜防滲施工方案

復合土工膜防滲施工方案

compoundgeomembraneanti-seepage

constructionplan1.0項目簡介：1.0projectintroduce:基于環(huán)境保護的目的，業(yè)主擬采用先進的技術工藝，使鋪設在100mx100mx1.5m的蒸發(fā)池池底和池側的復合土工膜形成一扇完全封閉且質(zhì)量優(yōu)良的防滲漏墻，以阻止蒸發(fā)池內(nèi)的含油物質(zhì)進入到蒸發(fā)池外的自然環(huán)境中。2.0施工方案2.1復合土工膜施工工藝原理compositegeomembraneconstructiontechnologyprinciple復合土工膜是一種土工合成材料，具有較好的防滲效果，一方面將復合土工膜鋪設在需要進行防滲處理堤段坡面上，利用自身的連接形成一整體坡面防滲體，另一方面使坡面鋪設的復合土工膜的下部與坡腳垂直防滲墻進行連接，使復合土工膜與坡腳防滲墻形成一整體，另外，復合土工膜上部與壓頂路肩梁相接，使堤基防滲墻，坡面復合土工膜，堤頂壓頂砼形成一個整體完全封閉的防滲體系。Compositegeomembraneisakindofgeosyntheticmaterials,goodanti-seepageeffect,ontheonehand,thecompositegeomembranelaidsideslopeinsomeseepagepreventiontreatmentisrequiredtousetheirconnectionstoformawholeslopeseepagepreventionbody,ontheotherhandtomakethebottomoftheslopesurfaceofcompositegeomembranelaidconnectionwithslopetoeverticalcut-offwall,compositegeomembraneandslopefootcut-offwalltoformawhole,inaddition,compositegeomembraneupsideandcopingshoulderbeam,thecut-offwallinthedamfoundationandslopeofcompositegeomembrane,newcopingcompletelyclosedanti-seepageconcreteformingawholesystem.2.2復合土工膜施工工藝流程compositegeomembraneconstructionprocess在復合土工膜鋪設前，大堤迎水面土方填筑及坡面修整完畢，坡面平整度、壓實度均達到設計要求并經(jīng)監(jiān)理工程師驗收合格后方可進行復合土工膜的鋪設，本工程復合土工膜鋪設的工藝流程包含但不限于下述內(nèi)容：Beforecompositegeomembranelaying,leveemeettheearthworkfillingandslopesurfacedressing,slopesurfaceroughness,degreeofcompactionshallmeetthedesignrequirementsandthesupervisionengineeracceptancerearcanforcompositegeomembranelaid,compositegeomembranelaidthetechnologicalprocessofthisprojectincluded(notlimited)asfollows:蒸發(fā)池池底平整壓實與檢查蒸發(fā)池堤岸平整壓實與檢查土工膜材料檢查土工膜場外拼接土工膜鋪設土工膜施工拼接修補與處理錨固溝開挖土工膜錨固施工保護層施工交工驗收2.3蒸發(fā)池土建施工：2.3.1蒸發(fā)池池底平整壓實采用壓路機對池底進行壓實，普氏測試壓實度達到85%，并及時平整壓實中對土工膜產(chǎn)生不利影響的地方。2.3.2蒸發(fā)池堤岸平整壓實采用壓路機對蒸發(fā)池堤岸進行壓實，普氏測試壓實度達到85%，并及時平整壓實中對土工膜產(chǎn)生不利影響的地方。同時按業(yè)主要求保證土壤的質(zhì)量要求，使堤岸傾斜度為1：堤坡的清理、平整場地，清除一切尖角雜物，欠坡回填夯實、富坡削坡挖平后經(jīng)監(jiān)理驗收合格，為復合土工膜鋪設提供工作面。cleanupofdikeslopeandflatfield,removeallsharpcorners,owerichbackfillcompactionoftheslope,slopecuttingslopedigflataftersupervisionacceptance,forcompositegeomembranelayingface.2.4復合土工膜施工2.4compositegeomembraneconstruction2.4.1復合土工膜材料檢查相關文件檢查本工程所用復合土工膜為一布一膜針刺復合土工膜，是國家經(jīng)貿(mào)委公布重點土工合成材料生產(chǎn)企業(yè)');">企業(yè)，湖南湘維有限公司生產(chǎn)產(chǎn)品，使用前委托南京水利科學研究院實驗中心對產(chǎn)品的各項技術指標進行檢測，各項指標均符合標準規(guī)定和設計要求。compositegeomembranematerialsqualitytestingthisprojectusedcompositegeomembranetotwoclothmembranecompositegeomembrane,ispublishedbythestateeconomicandtradecommissionkeygeosyntheticmaterialsproductionenterprises');">enterprise,hunanhunandco.,LTDproductionproduct,entrustedbynanjingbeforeusewaterconservancyscienceresearchinstitutetechnicalindicatorsofexperimentalcenterofproducttesting,theindicatorsareinlinewiththeprescribedstandardsanddesignrequirements.厚度尺寸檢查利用檢查設備和儀器對土工膜的幅寬、長度和厚度進行檢查。使用材料規(guī)格數(shù)量如下：liner:14000m2HDPE,thk:1mm;bottomlayer:200gr/cm2geotextile.2.4.2土工膜場外拼接為了施工方便，保證拼接質(zhì)量，復合土工膜應盡量采用寬幅，減少現(xiàn)場拼接量，施工前應根據(jù)復合土工膜幅寬、現(xiàn)場長度需要，在廠內(nèi)剪裁，并拼接成合符要求尺寸的塊體，卷在鋼管上，人工搬運到工作面鋪設。geomembranefieldjoiningtogetherinordertoconvenientforconstruction,ensurethequalityofstitching,compositegeomembranebreadthshouldbeadoptedasfaraspossible,decreasethescenesplicing,beforeconstructionshouldaccordingtotherequirementsofthecompositegeomembranewidth,length,cutinthefactory,andsplicedintotherequiredsizeoftheblock,torollonthesteelpipe,manualhandlingtotheface.2.4.3復合土工膜的鋪設thelayingofcompositegeomembrane復合土工膜的鋪設方法thecompositegeomembranelayingmethod復合土工膜鋪設分齒槽坡腳平臺鋪設、坡面鋪設兩個部分，齒槽坡腳平臺鋪設結構形式見大樣圖A，該項工程應在堤基垂直防滲墻施工結束，齒槽開挖符合要求，坡腳平臺驗收合格后進行。鋪設方法：沿防滲墻軸線方向水平滾鋪。坡面鋪設在坡面驗收合格后，從堤頂向堤腳沿垂直于堤軸線方向緩慢展鋪到坡腳處與坡腳平臺鋪設丁字形相接。Compositegeomembranelaidthecogging,slope,slopetoeplatformlaidlaidtwoparts,toothtroughslopetoeplatformlayingstructureseedetailsA,theprojectshouldbeattheendoftheverticalcut-offwallconstructioninthedamfoundation,thetoothgrooveexcavationconformstotherequirements,aftertheacceptanceoftheslopetoeplatform.Laidmethod:alongtheaxisdirectionofhorizontalcut-offwall.Upontheacceptanceofspreadinslope,slopetoefromnewslowlyalongthedirectionperpendiculartotheaxisofthedikeexhibitionshoptotheslopeandslopetoeplatformlaidintothecrowd.復合土工膜的鋪設技術要求compositegeomembranelayingtechnologyrequirements鋪設應在干燥和暖天氣進行，為了便于拼接，防止應力集中，復合土工膜鋪設采用波浪形松馳方式，富余度約為1.5%，攤開后及時拉平，拉開，要求復合土工膜與坡面吻合平整，無突起褶皺，施工人員應穿平底布鞋或軟膠鞋，嚴禁穿釘鞋，以免踩壞土工膜，施工時如發(fā)現(xiàn)土工膜損壞，應及時修補。Laidshallbecarriedoutinadryandwarmweather,inordertofacilitatesplicing,preventstressconcentration,compositegeomembranelayingadoptswavyrelaxationmethod,degreeofsurplusisabout1.5%,spreadoutinatimelymannerafterflattening,andrequiredcompositegeomembranewithslopesurfaceleveloff,withoutridgesfold,constructionpersonnelshouldwearclothshoeswithflatorsoftrubbershoes,itisforbiddentowearcleats,inordertoavoidsteppingongeomembrane,ifdiscovergeomembraneduringconstruction,shouldberepairedinatimelymanner.2.4.4復合土工膜施工拼接compositegeomembranesplicing本項目采用一布一膜復合土工膜，焊接采用熱熔焊法施工，拼接包括土工布的縫接、土工膜的焊接，為了確保焊接質(zhì)量，焊接應盡量在廠內(nèi)進行，但為了施工方便，復合土工膜幅寬又不應太寬，必須在施工現(xiàn)場拼接。Thisprojectusesoneclothandonemembranecompositegeomembrane,heatweldingmethodisusedfortheweldingconstruction,stitchingincludinggeotextile,geomembraneweldingseam,inordertoensuretheweldingquality,weldingshouldbecarriedoutwithinthefactory,butforthesakeofconvenientconstruction,compositegeomembraneandwidthshouldnotbetoowide,intheconstructionsitemustbejoiningtogether.復合土工膜焊接質(zhì)量的好壞是復合土工膜防滲性能成敗的關鍵，所以務必做好土工膜的焊接，確保焊接質(zhì)量，因此，土工膜焊接應由生產(chǎn)廠家派專業(yè)技術人員到現(xiàn)場操作，指導，培訓，采用土工膜專用焊接設備進行。本工程土工膜焊接采用ZPR-210V型熱合土工膜焊接機，土工布采用手提式封包機縫接，compositegeomembraneweldingqualityiskeytothesuccessorfailureofthecompositegeomembraneanti-seepageperformance,sobesuretopreparegeomembranewelding,ensuretheweldingquality,therefore,geomembraneweldingshouldbebythemanufacturertosendprofessionalandtechnicalpersonneltothesiteoperation,guidance,training,andUSESthegeomembraneisspecialweldingequipment.ThegeomembraneweldingengineeringadoptsZPR-210vboundinggeomembraneweldingmachine,geotextileusedportablesealingmachinestitched,本項目兩布一膜復合土工膜焊接流程：thisprojecttwoclothmembranecompositegeomembraneweldingprocess:焊接工藝：第一幅土工膜鋪好后，將需焊接的邊翻疊(約60cm寬)，第二幅反向鋪在第一幅膜上，調(diào)整兩幅膜焊接邊緣走向，使之搭接10cm。weldingprocess:thefirstpictureofgeomembranelayinggoodafter,willneedtoweldingthesidefold(about60cmwide),secondpicturereverseshoponthefirstfilm,adjusttheweldingedgetowardsthetwomembrane,lap10cm.焊接前用電吹風吹去膜面上的砂子、泥土等臟物，保證膜面干凈，在焊接部分的底下墊一條長木板，以便焊機在平整的基面上行走，保證焊接質(zhì)量，正式焊接前，根據(jù)施工氣溫進行試焊，確定行走速度和施焊溫度，一般掌握行走速度1.5?2.5m/s，施焊溫度為220~3000。。拼接焊縫兩條，每條寬10mm，兩條焊縫間留有10mm的空腔，用此空腔檢查其焊縫質(zhì)量。beforeweldingwithahairdryertofilmonthesurfaceofthesand,mudandotherdirt,assurefilmsurfaceisclean,theweldingpartofthepadunderalongboard,sothattheweldingontheflatbase,ensureweldingquality,weldingbeforeformally,accordingtothetrialweldingconstructiontemperature,anddeterminethewalkingspeedandweldingtemperature,averagewalkingspeedof1.5?1.5m/s,weldingtemperatureis220?3000c.Spliceweldtwo,eachofthe10mmwide,with10mmcavitybetweentwoweld,usingthiscavitytochecktheweldingquality.2.4.5復合土工膜的錨固compositegeomembraneintheanchorage錨固溝開挖與檢查：先對錨固溝四周進行測量放線，并在離堤岸0.8m的地方向外側挖出0.6m寬，0.6m深的錨固溝。挖溝距離誤差保持在±60mm以內(nèi)，轉角處挖溝應采用圓角過度。復合土工膜的錨固復合土工膜錨固采用在路肩梁基礎底部嵌固足夠長度復合土工膜，現(xiàn)澆砼壓蓋。compositegeomembraneupperanchorusedinshoulderbeamatthebottomofthebasebuiltinenoughlengthofcompositegeomembrane,cast-in-placeconcreteglandform。錨固的技術要求錨固好壞，關系到能不能組成一個封閉防滲體，下部錨固應待此段防滲墻施工完畢，并經(jīng)監(jiān)理驗收批準后方能進行。上部錨固待下部錨固，坡面復合土工膜鋪設，拼接，保護層施工后澆砼完成。anchortechnicalrequirementsbyanchorthetechnicalrequirementsofgoodorbad,canrelationshiptoformaclosedseepagepreventionbody,theloweranchorshouldbefortheperiodoftheconstructioniscompleted,andapprovedbythesupervisionacceptancerearcanperform.Upperanchorageforloweranchorage,slopesurfacecompositegeomembranelaid,splicing,afterpouringtheconcreteprotectivelayerconstructioncompleted.2.4.6修補和處理焊縫采用丁字縫搭接，采用雙面成型焊接方法進行，搭接長度按材料生產(chǎn)商要求進行。在必須進行密封處理的地方，宜采用具有相同最小強度和延展性要求的HDPE土工膜進行施工。在必需采用十字縫搭接的地方，應無褶皺等缺陷，且保證焊接面充分接觸，質(zhì)量達到業(yè)主要求。在必須使用密封管進線處理的地方，應采用法蘭連接，在保證密封質(zhì)量的同時，符合壓力測試要求。2.4.7上墊層及預制塊鋪設2.4.7thecushionlayerandtheprecastblockislaid復合土工膜的上面均勻鋪設5cm卵石墊層，找平拍實后鋪設10cm砼預制塊。坡面復合土工膜鋪設合格后應及時鋪上墊層壓蓋，防止風吹及復合土工膜暴曬老化，同時做好砼預制塊鋪砌，加強復合土工膜的保護。Compositegeomembraneevenlylaid5cmabovethepebblebed,laid10cmafterlevelingtakesolidconcreteprecastblocks.Slopequalifiedcompoundgeomembranelaidshouldbeinatimelymannerafterthecushionontheshopgland,preventwindandcompositegeomembraneinsolateageing,makeconcreteprecastblockpavementatthesametime,strengthentheprotectionofthecompositegeomembrane.質(zhì)量保證與控制復合土工膜施工質(zhì)量控制包括進場原材料質(zhì)量控制、施工操作過程控制、施工完質(zhì)量檢測。Compoundgeomembranearenaconstructionqualitycontrolincludingrawmaterialsqualitycontrol,constructionprocesscontrol,qualityinspection.3.1原材料質(zhì)量控制進場的復合土工膜必須有廠家提供的合格證書，性能及特性指標和使用說明書。rawmaterialqualitycontrolapproachofcompoundgeomembranemusthavethefactoryprovidecertificateofquality,performanceandcharacteristicparametersandoperatinginstructions.3.2施工操作過程控制復合土工膜鋪設前編好施工組織設計，說明鋪設方法和技術措施，經(jīng)監(jiān)理批準后方使用，施工人員均應穿平底布鞋或軟膠底鞋進行鋪設，嚴禁穿釘鞋以防踩壞土工膜，做到隨鋪隨壓，復合土工膜鋪設要與保護層鋪設相協(xié)調(diào)。拼接中復合土工膜焊縫質(zhì)量是拼接關鍵，施工中尤其要加強接縫檢測，檢測方法有一目測法、二現(xiàn)場檢漏。目測法：復合土工膜焊接好后，觀察有無漏接，接縫是否燙損，有無褶皺，是否拼接均勻等?，F(xiàn)場檢漏采用充氣法對全部焊縫進行檢測，焊縫為雙條，兩條之間留有約10mm的空腔，將待測段兩端封死，插入氣針，充氣至0.05mpa~0.20mpa，靜觀0.5min，觀察真空表，如氣壓無下降，表明不漏，焊縫合格，否則要查找原因及時修補。復合土工膜上下部錨固是重要的環(huán)節(jié)，嚴格按施工圖紙并經(jīng)監(jiān)理驗收后施工。constructionprocesscontrolcompositegeomembranelaidbeforemakeupconstructionorganizationdesign,specificationlaidmethodandtechnicalmeasures,approvedbythesupervisingrearuse,constructionpersonnelshallwearclothshoeswithflatorsoftrubbersoledshoeswerelaid,itisforbiddentowearspikedshoestrampledgeomembraneincase,doitwiththeshopalongwiththepressure,compositegeomembranelaidtocoordinatedwithprotectivelayerlaying.Compositegeomembranesplicingintheweldqualityiskeytojoiningtogether,especiallyintheconstructiontostrengthenthejointdetection,thedetectionmethodhasavisualmethod,thesecondleakageonsite.Visualmethod:compoundgeomembranewelding,observewhethermiss,whetherjointironloss,presenceoffold,whetherstitchinguniform,etc.On-sitedetection,leakdetectionbythemethodofaeration,allweldseamforthearticle,withabout10mmbetweeneachtwocavity,andwillbesealedonbothendsofthesectionundertest,insertgasneedle,inflatableto0.05mpato0.20mpa,0.5minwaitandobservethevacuumtable,suchasthepressurefallsno