防水帷幕在防渗、防漏、封闭污染源等工程项目领域的应用范围极广,目前, 国内防水帷幕的主要原材料大部分是水泥和高分子聚合物,水泥帷幕的渗透系数 一般在K=10一,一10一6c而S左右,并有干缩裂纹,防渗效果不够理想。水泥凝固后呈 刚性,在外力(地震、沉降、干缩等)作用下易断裂、破损,大的削弱甚至丧失 其隔水防渗功能,可靠性不好,而且施工有一定难度,造价较高。高分子聚合物 虽然防渗性能良好,但价格昂贵,施工要求高、难度大,除特殊工程外,一般防 水工程极少采用。本文采用价格低廉的膨润土为防水帷幕的材料,利用膨润土固 有的特性(遇水膨胀,呈胶状可塑柔性体赋存于地下,在外力作用下随土(砂) 体的变形而变形,不断、不裂,即使脱水干裂,遇水后能迅速自行弥合),通过在 东营华东石油学院炼油厂粉喷膨润土桩、青岛燃料公司工地小型帷幕、青岛市小 涧生活垃圾综合处理场模拟帷幕等试验实例,根据野外现场渗水试验、注水试验、 开挖验证等数据,结合室内试验结果,测试粉喷膨润土帷幕的渗透性能,确定粉 喷膨润土施工工艺参数,评析利粉喷桩机喷射膨润土形成防水帷幕的可行性及其 在现实生活中广泛应用的深远意义。 关键词防水帷幕粉喷桩膨润土可行性粉喷膨润土柔性帷幕应用的可行性研究 AFeasibilitystudyon APPlieationofDryJetSmectiteFlexibleCurtain AbstT8ct Waterproofeurtain15widelyapPliedinengineeringtoPreventseepageandleakage andPollutionsoureedisPersion.AtPresent,themainrawmaterialsforwaterproof eurtainareeonereteandPolymer.Theanti一seePageeffeetforeonerete15notsatisfactory beeauseofitsseepageeoemcient,usuallyatK一10一5一10一6e而s,anderaeks汕iledrying. TheeoneretecurtainbeeomesrigidaftereoncretingandtendstocraekanddilaPidate undertheaetionofexternalforeessuehasearthquake,dePressionandd仃ing.50its waterproofandanti一seePageeapaeity15weakenedorevenlostaceordingly.It15eostly anddiffieulttoeonstruetaswell.Althoughithasgoodqualityforwaterproof,but Polymereurtain15stillrestrietedtowidelyusebeeauseofitshighPrieeand soPhisticatedengineeringteehnique.Polymereurtain15justapPliedtosomesPeeial waterproofProjeets.InthisPaper,theauthorreeommendssmeetiteasrawmaterialfor dryjeteurtainbeeauseofitsintrinsiephysiealeharaeteristiessuehasexPansioninwater, flexibleundergroundexisteneeanddistortionwitheXternalaction.Dryjetsmectite flexibleeurtainteehnologyhasbeensueeessfullyusedinarefineryeonstruetionsite affiliatedwithEastChinaPetroleumuniversityDongying,QingdaofueleomPany eonstruetionsiteandQingdaoXiaojianeomPlexgathageProeessingcenter.Dryjet smectiteflexibleeurtainorstakehaseredibleengineeringfeasibilitybasedon systematiefield饰drogeologiealtests. KevWords:WaterproofCurta1nDryJetStakeSmeetiteFeasibiIity粉喷膨润土柔性帷幕应用的可行性研究 目录 0前言...........................................................................................l 1粉喷桩情况简介........................................................................2 1.1工艺及流程...............................................................................2 1.2施工机械..................................................................................2 1 . 3粉喷桩施工注意事项..................................................................3 1.4粉喷桩的优点..................,..................................................3 2研究的内容、方法、过程........................................................4 2 . 1研究内容.........,........................................4 2 . 2研究的方法:................................................,....................,4 2.3研究过程:.................................................................................4 3膨润土成分研究...................................,.............................5 4东营粉喷膨润土工艺试验........................................................6 4.1实验条件....................................................................6 4.2实验设备............................................................................,…6 4.3实验材料...........,.......................................6 4 . 4实验方法............................................................................7 4.5实验结果.................................................................................8 5青岛小型粉喷帷幕试验..‘......................,.....................9 5 . 1实验条件.....................「..........................................9 5 . 2实验设备......................................................................9 5 . 3实验材料..............,..................................................10 5 . 4实验方法...........,...........................................................10 5 . 5实验结果.........................................................................犯 5 . 6实验结果讨论.......................................,............................17粉喷膨润土柔性帷幕应用的可行性研究 6青岛生活垃圾综合处理场模拟粉喷桩防水帷幕试验ls 6.1试验目的...........................................18 6.2帷幕模型设计18 6.2.1试桩位置选取..~1s 6 . 2 . 2地层岩性.19 6 . 2.3水文地质条件....19 6.2.4帷幕试桩设计参数..20 6.3施工概况..............,21 6 . 4开挖验证结果................28 6 . 4,1试验井开挖工艺......28 6 . 4.2开挖情况29 6 . 5质量评述,29 7室内渗水性能实验31 7.1膨润土渗透性能的测定31 7.2帷幕样品渗透性能测定.....31 7.3区域土层渗透性测定32 8结论.................................................33