冻融-干湿循环作用下土工合成黏土衬垫防渗性能变化规律
|
摘要
土工合成黏土衬垫(Geosynthetic Clay Liners,GCL)是废弃物处置场底部衬垫系统和上部覆盖系统建设中经常使用的一种材料。由于气候的周期性变化对GCL的防渗性能会造成一定的影响,分析了冻融循环和干湿循环作用下GCL渗透系数变化的内在机制及规律。膨润土黏土粒径及双电层变化是影响GCL渗透系数改变的主要原因,冻融循环对GCL防渗性能的影响较小,而干湿循环对GCL渗透系数的影响较大。
Geosynthetic Clay Liners(GCLs)is a commonly material in the construction of composite bottom liner systems and cover systems for waste disposal sites. As periodic change of climate has some effect on the hydraulic performance of GCLs,the intrinsic mechanism and the trend of the change in hydraulic conductivity for GCLs under freeze-thaw and wet-dry cycling were reviewed in this paper. The changes in particles size and thickness of diffuse double layers primarily account for the changes in hydraulic conductivity of GCLs. Generally,the freeze-thaw cycling has relatively small effect on the hydraulic conductivity of GCLs.In contrast,the wet-dry cycling has significantly large impact on the hydraulic conductivity of GCLs.
Geosynthetic Clay Liners(GCLs)is a commonly material in the construction of composite bottom liner systems and cover systems for waste disposal sites. As periodic change of climate has some effect on the hydraulic performance of GCLs,the intrinsic mechanism and the trend of the change in hydraulic conductivity for GCLs under freeze-thaw and wet-dry cycling were reviewed in this paper. The changes in particles size and thickness of diffuse double layers primarily account for the changes in hydraulic conductivity of GCLs. Generally,the freeze-thaw cycling has relatively small effect on the hydraulic conductivity of GCLs.In contrast,the wet-dry cycling has significantly large impact on the hydraulic conductivity of GCLs.
引文
[1]钱学德,郭志平,施建勇,等.现代卫生填埋场的设计与施工[M]北京:中国建筑工业出版社,2001.
[2]徐培苍,张晓云,李如璧,等.蒙脱石晶体结构和水结构的矿物物理特征[C]//中国地质科学院西安地质矿产研究所论文集,1991.
[3]谭罗荣,孔令伟.蒙脱石晶体胀缩规律及其与基质吸力关系研究[J].中国科学,2001,31(2):119-126.
[4]Mooney R W,Keenan A G,Wood L A.Adsorption of Water Vapor by Montmorillonite.II.Effect of Exchangeable Ions and Lattice Swelling as Measured by X-Ray Diffraction[J].Journal of the American Chemical Society,1952,74(6):1371-1374.
[5]陈宝,钱丽鑫,叶为民,等.高庙子膨润土的土水特征曲线[J].岩石力学与工程学报,2006,25(4):788-793.
[6]刘志彬,康达,刘松玉,等.冻融循环对GCL材料中膨润土粒径分布及膨胀指数的影响[J].东南大学学报(自然科学版),2015,45(5):964-968.
[7]Shan S,Daniel D E.Results of laboratory tests on a geotextile/bentonite liner material[C]//Geosynthetics,Conference,Atlanta,Georgia,USA,1991.
[8]Rowe R K,Mukunoki T,Bathurst R J.Hydraulic conductivity to Jet-A1 of GCLs after up to 100 freeze-thaw cycles[J].Géotechnique,2008,58(6):503-511.
[9]Kim W H,Daniel D E.Effects of Freezing on Hydraulic Conductivity of Compacted Clay[J].Journal of Geotechnical Engineering,2015,118(7):1083-1097.
[10]Podgorney R K,Bennett J E.Evaluating the Long-Term Performance of Geosynthetic Clay Liners Exposed to Freeze-Thaw[J].Journal of Geotechnical&Geoenvironmental Engineering,2006,132(2):265-268.
[11]Kraus J F,Benson C H,Erickson A E,et al.Freeze-Thaw Cycling and Hydraulic Conductivity of Bentonitic Barriers[J].Journal of Geotechnical&Geoenvironmental Engineering,1997,123(3):229-238.
[12]Erickson A C E A.Effects of frost action on covers and liners constructed in cold environments[J].Proc.,17th Int.Madison Waste Conf.,Dept.of Engrg.Prof.Devel.,Univ.of WisconsinMadison,1994:198-220.
[13]Hewitt R D,Daniel D E.Hydraulic Conductivity of Geosynthetic Clay Liners after Freeze-Thaw[J].Journal of Geotechnical&Geoenvironmental Engineering,1997,123(4):305-313.
[14]Rowe R K,Mukunoki T,Li M H,et al.Effect of Freeze-Thaw on the Permeation of Arctic Diesel Through a GCL[J].Journal of Astm International,2004,1(1):13.
[15]Makusagregory P,Bradshawsabrina L,BernsErin,et al.Freezethaw cycling concurrent with cation exchange and the hydraulic[J].Canadian Geotechnical Journal,2014,51(6):45-56.
[16]Rowe R,Mukunoki T,Bathurst R.Compatibility with Jet A-1 of a GCL Subjected to Freeze-Thaw Cycles[J].Journal of Geotechnical&Geoenvironmental Engineering,2006,132(12):1526-1537.
[17]唐朝生,施斌.干湿循环过程中膨胀土的胀缩变形特征[J].岩土工程学报,2011(9):1376-1384.
[18]Ghavam-Nasiri A,El-Zein A,Airey D,et al.Hydration and desiccation of geosynthetic clay liners in composite lining systems under brine pond conditions[C].A laboratory investigation:Symposium on Coupled Phenomena in Environmental Geotechnics,2017.
[19]卢再华,陈正汉.膨胀土干湿循环胀缩裂隙演化的CT试验研究[J].岩土力学,2002,23(4):417-422.
[20]Lin L C,Benson C H.Effect of wet-dry cycling on swelling and hydraulic conductivity of GCLs[J].Journal of Geotechnical&Geoenvironmental Engineering,2000,126(1):40-49.
[21]Akcanca F,Aytekin M.Effect of wetting-drying cycles on swelling behavior of lime stabilized sand-bentonite mixtures[J].Environmental Earth Sciences,2012,66(1):67-74.
[22]Camillis M D,Emidio G D,Bezuijen A,et al.Wet and dry ageing of polymer treated clays using seawater:swell potential and hydraulic conductivity[C]:International Conference on Geosynthetics,2014.
[23]Camillis M D,Emidio G D,Bezuijen A,et al.Wet and Dry Effects on the Hydraulic Conductivity of a Polymer Treated GCL Prototype[C]:Geo-Chicago,2016.
[24]Bouazza A,Jefferis S,Vangpaisal T.Investigation of the effects and degree of calcium exchange on the Atterberg limits and swelling of geosynthetic clay liners when subjected to wet-dry cycles[J].Geotextiles&Geomembranes,2007,25(3):170-185.
[25]介玉新,彭涛,傅志斌,等.土工合成材料黏土衬垫的渗透性研究[J].土木工程学报,2009,42(2):92-97.
[26]Shackelford C D,Sevick G W,Eykholt G R.Hydraulic conductivity of geosynthetic clay liners to tailings impoundment solutions[J].Geotextiles and Geomembranes,2010,28(2):149-162.
[27]Mazzieri F,Emidio G D,Fratalocchi E,et al.Permeation of two GCLs with an acidic metal-rich synthetic leachate[J].Geotextiles&Geomembranes,2013,40(40):1-11.
[28]Kang J B,Shackelford C D.Consolidation of a Geosynthetic Clay Liner under Isotropic States of Stress[J].Journal of Geotechnical&Geoenvironmental Engineering,2010,136(1):253-259.
[29]Liu Y,Gates W P,Bouazza A.Acid induced degradation of the bentonite component used in geosynthetic clay liners[J].Geotextiles and Geomembranes,2013,36(1):71-80.
[2]徐培苍,张晓云,李如璧,等.蒙脱石晶体结构和水结构的矿物物理特征[C]//中国地质科学院西安地质矿产研究所论文集,1991.
[3]谭罗荣,孔令伟.蒙脱石晶体胀缩规律及其与基质吸力关系研究[J].中国科学,2001,31(2):119-126.
[4]Mooney R W,Keenan A G,Wood L A.Adsorption of Water Vapor by Montmorillonite.II.Effect of Exchangeable Ions and Lattice Swelling as Measured by X-Ray Diffraction[J].Journal of the American Chemical Society,1952,74(6):1371-1374.
[5]陈宝,钱丽鑫,叶为民,等.高庙子膨润土的土水特征曲线[J].岩石力学与工程学报,2006,25(4):788-793.
[6]刘志彬,康达,刘松玉,等.冻融循环对GCL材料中膨润土粒径分布及膨胀指数的影响[J].东南大学学报(自然科学版),2015,45(5):964-968.
[7]Shan S,Daniel D E.Results of laboratory tests on a geotextile/bentonite liner material[C]//Geosynthetics,Conference,Atlanta,Georgia,USA,1991.
[8]Rowe R K,Mukunoki T,Bathurst R J.Hydraulic conductivity to Jet-A1 of GCLs after up to 100 freeze-thaw cycles[J].Géotechnique,2008,58(6):503-511.
[9]Kim W H,Daniel D E.Effects of Freezing on Hydraulic Conductivity of Compacted Clay[J].Journal of Geotechnical Engineering,2015,118(7):1083-1097.
[10]Podgorney R K,Bennett J E.Evaluating the Long-Term Performance of Geosynthetic Clay Liners Exposed to Freeze-Thaw[J].Journal of Geotechnical&Geoenvironmental Engineering,2006,132(2):265-268.
[11]Kraus J F,Benson C H,Erickson A E,et al.Freeze-Thaw Cycling and Hydraulic Conductivity of Bentonitic Barriers[J].Journal of Geotechnical&Geoenvironmental Engineering,1997,123(3):229-238.
[12]Erickson A C E A.Effects of frost action on covers and liners constructed in cold environments[J].Proc.,17th Int.Madison Waste Conf.,Dept.of Engrg.Prof.Devel.,Univ.of WisconsinMadison,1994:198-220.
[13]Hewitt R D,Daniel D E.Hydraulic Conductivity of Geosynthetic Clay Liners after Freeze-Thaw[J].Journal of Geotechnical&Geoenvironmental Engineering,1997,123(4):305-313.
[14]Rowe R K,Mukunoki T,Li M H,et al.Effect of Freeze-Thaw on the Permeation of Arctic Diesel Through a GCL[J].Journal of Astm International,2004,1(1):13.
[15]Makusagregory P,Bradshawsabrina L,BernsErin,et al.Freezethaw cycling concurrent with cation exchange and the hydraulic[J].Canadian Geotechnical Journal,2014,51(6):45-56.
[16]Rowe R,Mukunoki T,Bathurst R.Compatibility with Jet A-1 of a GCL Subjected to Freeze-Thaw Cycles[J].Journal of Geotechnical&Geoenvironmental Engineering,2006,132(12):1526-1537.
[17]唐朝生,施斌.干湿循环过程中膨胀土的胀缩变形特征[J].岩土工程学报,2011(9):1376-1384.
[18]Ghavam-Nasiri A,El-Zein A,Airey D,et al.Hydration and desiccation of geosynthetic clay liners in composite lining systems under brine pond conditions[C].A laboratory investigation:Symposium on Coupled Phenomena in Environmental Geotechnics,2017.
[19]卢再华,陈正汉.膨胀土干湿循环胀缩裂隙演化的CT试验研究[J].岩土力学,2002,23(4):417-422.
[20]Lin L C,Benson C H.Effect of wet-dry cycling on swelling and hydraulic conductivity of GCLs[J].Journal of Geotechnical&Geoenvironmental Engineering,2000,126(1):40-49.
[21]Akcanca F,Aytekin M.Effect of wetting-drying cycles on swelling behavior of lime stabilized sand-bentonite mixtures[J].Environmental Earth Sciences,2012,66(1):67-74.
[22]Camillis M D,Emidio G D,Bezuijen A,et al.Wet and dry ageing of polymer treated clays using seawater:swell potential and hydraulic conductivity[C]:International Conference on Geosynthetics,2014.
[23]Camillis M D,Emidio G D,Bezuijen A,et al.Wet and Dry Effects on the Hydraulic Conductivity of a Polymer Treated GCL Prototype[C]:Geo-Chicago,2016.
[24]Bouazza A,Jefferis S,Vangpaisal T.Investigation of the effects and degree of calcium exchange on the Atterberg limits and swelling of geosynthetic clay liners when subjected to wet-dry cycles[J].Geotextiles&Geomembranes,2007,25(3):170-185.
[25]介玉新,彭涛,傅志斌,等.土工合成材料黏土衬垫的渗透性研究[J].土木工程学报,2009,42(2):92-97.
[26]Shackelford C D,Sevick G W,Eykholt G R.Hydraulic conductivity of geosynthetic clay liners to tailings impoundment solutions[J].Geotextiles and Geomembranes,2010,28(2):149-162.
[27]Mazzieri F,Emidio G D,Fratalocchi E,et al.Permeation of two GCLs with an acidic metal-rich synthetic leachate[J].Geotextiles&Geomembranes,2013,40(40):1-11.
[28]Kang J B,Shackelford C D.Consolidation of a Geosynthetic Clay Liner under Isotropic States of Stress[J].Journal of Geotechnical&Geoenvironmental Engineering,2010,136(1):253-259.
[29]Liu Y,Gates W P,Bouazza A.Acid induced degradation of the bentonite component used in geosynthetic clay liners[J].Geotextiles and Geomembranes,2013,36(1):71-80.