序列渗流对地工皂土毯工程性质之影响

1212(GeosntheticClayLiners,GCL)(CompactedClayLiner,CCL)(pH=5)()()()EffectofSequentialPermeationonEngineeringPropertiesofGeosyntheticClayLinersHsin-YuShan1Yenn-JingLai21Dept.ofCivilEng.,NationalChaioTungUniversity2HermesSystemsInc.ABSTRACTTheengineeringpropertiesofgeosyntheticclayliners(GCLs)arecloselyrelatedtothechemistryofporeliquid.Forapplicationsinliningsystemsorcoversystemsoflandfills,coversforremediationsites,andsecondarycontainmentsystems,GCLsarelikelytobepermeatedbymorethanonetypesofliquid.Inthisstudy,GCLspecimenswerehydratedandpermeatedwithdifferentliquids.Thehydraulicconductivity,shearstrength,andcompressibilityoftheseGCLspecimensweredetermined.TheexperimentalresultsshowthatevenifGCLswerehydratedwithliquidsotherthanfreshwater,theystillhadtheabilitytoretardinfiltrationeffectively.Keywords:geosyntheticclayliner,hydraulicbarrier,hydraulicconductivity,landfill,poreliquid(GeosyntheticClayLiner)(Geomembrane)2.1D002-12.4Na+Ca++Ca++Smectite10-20ÅNa+Smectite20-4000ÅShanandDaniel(1991)[2]64mmClaymax6~3100kPa—144kPaNa+Smectite(PressureControlPanel)(Flexible-WallPermeameter)(BladderAccumulatororPermeantInterfaceDevice)2.2(MunicipalSolidWasteMSW)3.1Bentomat(Needle-punching)(polypropylene)Bentomat3.6kg/m2Volclay1012%0.1kg/m20.2kg/m2VolclayBentomatSTGCL-A(1)(2)(3)(RuhlandDaniel1997[1]Claymax200R1.3kg/m2(slit-film)Claymax200R0.025kg/m2(spunlaceopenweavepolyesterfabric)3.6kg/m25mm20%GCL-B(HCl)2.53x10-12m/secpH8.68.22x10-11m/secpH3.4RuhlandDaniel1997[1]3.23.2.1ASTMD5887-95100mm7850mm20.05mL2.335°7kPa(Needle-punching)(Bentomat)26°(Needle-punching)(Claymax200R)10°(1997)[2]103.4kPa68.9kPa68.9kPa551.2kPa516.8kPa48()13.8kPaD002-23.2.2ASTMD6243-9863.5mm3160mm20.0024mm/min26.6kPa52.5kPa130.3kPa/()0.0024mm/min(pH=5)0.06mm/min3.2.363.5mm31.6cm2(pH=5)3.2.4ASTMD5890-95100%10065%2001055°C242.000.01g90mL100mL0.5mLmL/2g4.124.0x10-11~4.9x10-11m/s(1)2.4x10-11~3.2x10-11m/s(2)qout/qin0.85~0.95(pH=5)GCL-B1(P.V.)2.8x10-11m/sGCL-A1.22.5x10-11m/s(3)GCL-AGCL-B3.0x10-11m/s2.6x10-11m/s(4)(5)GCL-B1.2x10-8m/sGCL-A1.7x10-7m/s14.6mg/L0.414mg/L0.481mg/L0.011mg/L0.020mg/LÆGCL-AGCL-B3.0x10-11m/s2.5x10-11m/s2.2x10-10m/s1.2x10-10m/sGCL-B6(b)qout/qin1.151.02GCL-A19mLGCL-B12mL3GCL-A28.5mL/2g6.0mL/2gGCL-B24mL/2g5.5mL/2gGCL-AÆ92ÆÆ92920.2()92920.19292(140cm)ÆGCL-AGCL-BGCL-A(3.7x10-11m/s)GCL-B(1.9x10-11m/s)(7)GCL-Aqout/qin1.0GCL-AGCL-Bqout/qin1.03GCL-A28.5mL/2g14.5mL/2gGCL-B24mL/2g14.5mL/2gGCL-AGCL-BÆ(8)GCL-A61.7x10-7m/s1.5x10-9m/sGCL-B31.2x10-8m/s2.8x10-11m/sqout/qin1.01.2~1.4mLD002-34.8SS190.5mg/LGCL-A6pH7.937.66pH7.3GCL-A3pH7.62pH7.459ms/cmÆ(9)GCL-A0.552.8x10-11m/s4.8x10-11m/s4.7GCL-B0.452x10-11m/s2.3x10-11m/sqout/qin1.00.5pH5.076.7~7pHpH(7.35)PoreVolume0.28ms/cm5ms/cm7ms/cm9ms/cm92ÆÆGCL-A4.24GCL-AGCL-BGCL-BGCL-AGCL-B8mm1.6kPa29.9°GCL-B4mm16.6°10.7kPaGCL-A(pH=5)GCL-A10mm7kPa23.1°GCL-B3mm6kPa8.4°GCL-B2mm4.6kPa15.3°16.6°GCL-A8mm3.2kPa24.0°GCL-BGCL-A92GCL-BGCL-A18.8kPa7.7kPa26.7°29.0°GCL-BGCL-BShan(1993)[4]GCL-A30.8kPa29°ShanandDaniel(1991)GCL-B4kPa9°GCL-B92GCL-A92GCL-A(12mm)GCL-AGCL-B2mmGCL-A23.1°~29.9°GCL-B8.4°~26.7°4.3567GCL-AGCL-Bcscccv32~205kPacv1x10-21x10-4mm2/scv1x10-11x10-3mm2/scv(pH=5)()D002-4()2GCL-AGCL-Bk(m/s)k(m/s)4.4x10-114.8x10-112.7x10-112.7x10-111.7x10-71.2x10-8(pH=5)2.5x10-112.8x10-113.0x10-112.6x10-112.3x10-101.1x10-10NoFlowNoFlow-92NoFlowNoFlow3.7x10-111.9x10-111.5x10-92.0x10-114.8x10-112.3x10-11()(92)()()3(mL/2g)GCL-AGCL-B28.026.028.524.029.526.414.514.56.05.5[1]Ruhl,J.L.andDaniel,D.E.,(1997),“GeosyntheticClayLinersPermeatedwithChemicalSolutionsandLeachates,”JournalofGeotechnicalandGeoenvironmentalEngineering,ASCE,Vol.123,No.4,pp.369-381[2]19974[3]Shan,H.-Y.andDaniel,D.E.,(1991),“ResultsofLaboratoryTestsonaGeotextile/BentoniteLinerMaterial,”Geosynthetics’91,IndustrialFabricsAssociation,St.Paul,MN,Vol.2,pp.517-535GCL-AGCL-Bc(kPa)φ(°)c(kPa)φ(°)1.629.910.723.23.224.04.615.3(pH=5)7.023.168.4927.729.018.826.730.8*294**9[4]Shan,H.-Y.,(1993),“StabilityofFinalCoversPlacedonSlopesContainingGeosyntheticClayLiners,”Ph.D.Dissertation,UniversityofTexas,Austin,TX,310p.*Shan,1993[4]**ShanandDaniel,1990[3]5cccs(NSC88–2611-E009-005)CETCOGCL-AGCL-Bcccscccs2.112.831.992.08pH=5)0.930.741.541.310.720.260.620.221.440.761.220.731pH7.086.935.077.937.35(ms/cm)0.020.2260.27770.69.0[Na+](M)--0.201.8x10-2[Ca++](M)-5.0x10-41.2x10-22.7x10-4[K+](M)1.6x10-46.5x10-57.3x10-31.0x10-26GCL-A(mm)15.07.213.710.7(mm)8.115.0110.038.013.963.335.525.487.82.013.783.84(%)507.5121200.8199.1(%)179.973.1137.3139.7cc2.110.720.931.44cs2.830.260.740.76D002-57GCL-B1.0E-111.0E-1000.511PoreVolumek(m/s).5GCL-GCL-B(mm)17.06.513.99.6(mm)6.084.3410.076.6115.623.28.316.774.981.86.174.37(%)568116.4302.2246.1(%)179.965.6242.2159cc1.990.621.541.22cs2.080.221.310.731.0E-111.0E-1000.10.20.3PoreVolumek(m/s)GCL-AGCL-B41.0E-081.0E-071.0E-0602468PoreVolumek(m/s)GCL-AGCL-B1(a)1.0E-111.0E-1000.20.40.60.8PoreVolumek(m/s)GCL-GCL-B0.960.9811.021.041.060123456PoreVolumeqout/qinGCL-AGCL-B2(b)(qout/qin)51.0E-111.0E-1000.20.40.60.811.21.4PoreVolumek(m/s)GCL-GCL-B1.0E-111.0E-101.0E-090246810PoreVolume