粘土环境岩土工程特性对填埋场衬垫防渗标准的影响

248Vol.24No.820054ChineseJournalofRockMechanicsandEngineeringApril20052003062720030901(1966)[e-mail]1211(1.3100272.200030)()TU473A10006915(2005)08139606EFFECTOFGEOENVIRONMENTALCHARACTERISTICSOFCLAYONSTANDARDOFLANDFILLLINERTANGXiao-wu1LUOChun-yong2CHENYun-min1SHICheng-jiang1(1.GeotechnicEngineeringInstituteZhejiangUniversityHangzhou310027China2.SchoolofNavalArchitectureandOceanEngineeringShanghaiJiaotongUniversityShanghai200030China)AbstractUsing1Dflowandtransportmodeltheeffectofgeoenvironmentalcharacteristicsofclaysoilonlandfilllinerisevaluated.Andtheresultsareusedtoanalyzetheeffectivenessofthestandardoflandfillliner.Twotypesoflineri.e.claylinerandsingle-layercompositelinerarestudied.Andthreeindexbreakthroughtimeleachingrateandleachingcontaminantquantityarecalculatedrespectively.Theresultsshowthatthetypeoflinermustmeetthespecialneedsoffieldconditionindroughtyorrainyarea.Andthecompositelinercanlimitthespreadofpollutantsmoreeffectivelythanclaylinerinrain-beltofSouthChina.Amongalltheparameterstheeffectofksonlandfilllineristhehighest.Thusitisreasonabletouseksasthedesignparameterofliner.Buttheeffectofdiffusionandadsorptionofioninclaycannotbeignored.Andtheleachingcontaminantquantityadoptedascontrolindexismoresuitablethanbreakthroughtime.Keywordsrockandsoilmechanicsclaygeoenvironmentalcharacteristicslandfilllinerseepagestandard15248.•1397•1(EPA)HDPEk107cm/s0.6m1Fig.1Regulationsofbottomlinersystemsinseveralcountries[1]1.0107cm/s2m[24]()2[5]22Fig.2Transferringsketchofleachateintwotypesofbottomliners22sdzCDzCqtCR∂∂+∂∂−=∂∂θ(1)CztqθDsRd1.0DsRd[68]()(1)30)0(CzC=(0zL)(2)1)0(CtC=(0t)(3)•1398•20053Fig.3Schematicdiagramofdiffusiontest0=∂∂=LzzC(0t)(4)LC0C0C1(1)(4)q=0(1)22*zCDtC∂∂=∂∂(5)D*=Ds/Rd(2)(5)∑∞=π−π−π+=141012*22e2sin1)(4mLtDmLzmmCCCC(6)m(m=13L5)339cmKCl7.8g/L6.2cm5cm1980mg/Lq=06d(6)4(6)4Fig.4MeasuredandtheoreticalconcentrationprofilesofK+D*1.75106cm2/s[7](K+Ca2+Zn2+Cu2+)(Cl)10cm0.1mol/L1061.2106cm2/sD*Rd(Rd=1.1)434[1]2m107cm/s60cm4047m20.1cm2[9]01000mg/L[10]C0q=0C110cm5cm01234502000400060008000/mgL1/cm248.•1399•1.12106cm2/s30cm[11]30cm1212m107cm/s2910121Table1Breakthroughtimeandleachingquantityofionthroughclaylinerks/107cms1Ds/106cm2s1Rdh/cmq/m3m2s1/a20a/gm211.02.01.1301.151098.515.220.12.01.1301.15101015.20.0015310.02.01.1301.151081.96360.041.01.01.1301.1510911.83.5851.020.01.1301.151091.5219.761.02.01.5301.1510911.61.271.02.02.0301.1510915.50.03781.02.01.11001.51097.5271.091.02.01.110006.01093.1700.02Table2Breakthroughtimeandleachingquantityofionthroughcompositelinerks/107cms1Ds/106cm2s1Rdh/cmq/m3m2s1/a20a/gm2101.02.01.1301.291012(a)7.051012(b)1.50.14(a)0.78(b)111.02.01.110007.031011(a)3.851010(b)1.57.75(a)42.45(b)1210.02.01.1307.081012(a)3.871011(b)1.50.78(a)4.27(b)(a)(b)120qLLhkq+=s(7)kshLGiroud[12]74.0s9.02.095.0s0])/(1.01[976.0khdLhnCqq+=(8)n0qC0qC=0.210qC=1.51Lsd1123(107cm/s)(145)167189•1400•200510m3.1a1020a20122280%60cm2m10091110m()5(1)[1](107cm/s2m)(2)(3)(107cm/s)(4)(5)(References)[1].(CJJ172004)[M].2004.(TheProfessionalStandardsCompilationGroupofPeople′sRepublicofChina.TechnicalCodeforSanitaryLandfillofMunicipalSolidWaste(CJJ172004)[M].BeijingChinaArchitectureandBuildingPress2004.(inChinese))[2]FooseGJBensonCHEdilTB.Evaluatingtheeffectivenessoflandfillliners[A].InKamonDed.ProceedingsoftheSecondInternationalCongressonEnvironmentalGeotechnics[C].RotterdamA.A.Balkema1996.217221.[3]DevulapalliSNReddyKR.Effectofnonlinearadsorptionon248.•1401•contaminanttransportthroughlandfillclay[A].InKamonDed.ProceedingsoftheSecondInternationalCongressonEnvironmentalGeotechnics[C].RotterdamA.A.Balkema1996.473478.[4].[A]..[C].2002.122131.(ChenXiangshengZhangJianhongHuLimingetal.Centrifugemodelingapplicationingeoenvironmentalengineering[A].InBaoChenggangChenYunmined.ProceedingsoftheFirstChineseSymposiumonGeoenvironmentalandGeosynthetics[C].HangzhouZhejiangUniversityPress2002.122131.(inChinese))[5]TravisCCEtnierEL.Asurveyofsorptionrelationshipsforreactivesolutesinsoil[J].JournalofEnvironmentalQuality198110(1)917.[6]SasakiS.Mechanismofheavymetalmigrationinsoilduringwaterpermeation[A].InKamonDed.ProceedingsoftheSecondInternationalCongressonEnvironmentalGeotechnics[C].RotterdamA.A.Balkema1996.143146.[7].[A]..[C].2002.186191.(XiYonghuiRenJieHuZhongxiong.Laboratorydeterminationofdiffusioncoefficientsofcontaminantionsinclaysoil[A].InBaoChenggangChenYunmined.ProceedingsoftheFirstChineseSymposiumonGeoenvironmentalandGeosynthetics[C].HangzhouZhejiangUniversityPress2002.186191.(inChinese))[8]DuYJHayashiSHinoTetal.ContaminantadsorptioncharacteristicsofKyushuregionalsoils[J].LowlandTechnologyInternational20002(2)3141.[9].[M].2001.(QianXuedeGuoZhipingShiJianyongetal.DesignandConstructionofModernSanitaryLandfill[M].BeijingChinaArchitectureandBuildingPress2001.(inChinese))[10].[J].200228(11)1113.(JiangHaitaoZhouGongmingGaoTingyao.ThecharacteristicsofMSWlandfillLeachate[J].ScienceofEnvironmentProtection200228(11)1113.(inChinese))[11].[J].19997(4)133137.(QiaoHuiHuangJunZhouShenfan.MunicipalsolidwastelandfillcriteriaoftheUni