垃圾填埋场防渗浆材及其阻滞规律的实验研究
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摘要
针对垃圾填埋场防渗要求高的特点,在渗滤阻滞作用和吸附阻滞作用阻滞机理研究的基础上,选用粉质黏土、钠基膨润土、水泥和粉煤灰材料进行了SBCF浆材研究,通过大量正交实验研究和重复试验优选出SBCF浆材配方,其56d结石体的渗透系数1.48×10-8~1.71×10-8 cm/s,抗压强度为1.10~1.12MPa,弹性模量为97.7~99.7MPa。采用自有专利研制的柔壁渗透仪进行了浆材结石体对垃圾渗沥液中污染物阻滞规律的实验研究,实验表明阻滞率均随试样高度增加而增大,且在开始渗滤的100mm内阻滞率增加较快,大于100mm后阻滞率增加减缓,当试样高度达到180mm时,对垃圾渗沥液中主要污染物的阻滞率均能达到95%以上,并可将此实验规律作为设计防渗墙墙体厚度的依据。该浆材具有渗透系数低、对污染物阻滞率高、塑性与耐久性好、无化学添加剂、无污染、原材料来源广和经济性好等特点,可用于新建或既有垃圾填埋场、建筑基坑工程和水利工程防渗处理。
Aiming at the high seepage control requirement of waste landfill site,and based on the research of the retardarce mechanism of the absorption retardarce action and the percolation retardarce action,the silty clay,sodium bentonite,cement and fly-ash material are selected to begin SBCF slurry research.Through a large amount of orthogonal experiments and repeated tests,optimized formulations of the SBCF was obtained,and the permeability coefficient of slurry stone in 56dis 1.48×10-8~1.71×10-8 cm/s,the compressive strengthis 1.10~1.12MPa,and the elastic modulus is 97.7~99.7MPa.The experimental research on retardance law of slurry stone to pollutants in waste leachate is done by using the flexible wall permeameter which is self-developed own patent.The experimental results show that all the retardarce rates will increase with sample highing,and in the beginning of 100mm,the retardance rate increase rapidly.After more than 100mm,the retardarce rate increase will slow.When the sample height is up to 180mm,the retardance law of the slurry stone to main pollutant in waste leachate can reach more than 95%.This retardance law gained from the experiment can be used as the basis for the design of cutoff wall thickness.The SBCF slurry possesses some good characteristics as the low permeability coefficient,the high retardarce rate to pollutant,the good plasticity and durability,no chemical addition,no pollution,the wide source of materials,and good in economy,and so on.The slurry can be used for antiseepage in new or existing waste landfill sites,building foundation pit engineering,and water conservancy engineering.
Aiming at the high seepage control requirement of waste landfill site,and based on the research of the retardarce mechanism of the absorption retardarce action and the percolation retardarce action,the silty clay,sodium bentonite,cement and fly-ash material are selected to begin SBCF slurry research.Through a large amount of orthogonal experiments and repeated tests,optimized formulations of the SBCF was obtained,and the permeability coefficient of slurry stone in 56dis 1.48×10-8~1.71×10-8 cm/s,the compressive strengthis 1.10~1.12MPa,and the elastic modulus is 97.7~99.7MPa.The experimental research on retardance law of slurry stone to pollutants in waste leachate is done by using the flexible wall permeameter which is self-developed own patent.The experimental results show that all the retardarce rates will increase with sample highing,and in the beginning of 100mm,the retardance rate increase rapidly.After more than 100mm,the retardarce rate increase will slow.When the sample height is up to 180mm,the retardance law of the slurry stone to main pollutant in waste leachate can reach more than 95%.This retardance law gained from the experiment can be used as the basis for the design of cutoff wall thickness.The SBCF slurry possesses some good characteristics as the low permeability coefficient,the high retardarce rate to pollutant,the good plasticity and durability,no chemical addition,no pollution,the wide source of materials,and good in economy,and so on.The slurry can be used for antiseepage in new or existing waste landfill sites,building foundation pit engineering,and water conservancy engineering.
引文
[1]靖向党,阮文军,代国忠.垃圾填埋场防渗技术的现状[J].长春工程学院学报:自然科学版,2006,7(1):1-4.
[2]熊孝波,施斌,张凌.国外城市垃圾填埋场岩土工程研究的最新进展[J].工程地质学报,2000,8(3):345-350.
[3]赵雅芝,杨凤林,薛大明,等.粉煤灰、建筑垃圾、黏土对垃圾渗透液吸附行为的研究[J].环境保护科学,1994,20(4):32-36.
[4]朱国营,赵永胜.粉煤灰在垃圾淋滤液循环处理中的作用[J].长春科技大学学报,2000,30(3):262-265.
[5]成春奇.黏土对重金属污染物容纳阻滞能力研究[J].水文地质工程地质,2001(6):12-14.
[6]李红霞,何少华,袁华山,等.膨润土对废水中有机污染物的吸附[J].矿业工程,2006,4(4):59-61.
[7]刘安涟.利用粉煤灰处理电厂生活污水的试验研究[J].湖北电力,1998,22(2):41-44.
[8]靖向党,于波,马戈,等.城市垃圾填埋场黏土基防渗浆材的实验研究[J].水文地质工程地质,2007(5):94-97.
[9]靖向党,于波,谢俊革,等.城市垃圾填埋场防渗浆材的实验研究[J].环境工程,2009,27(1):70-73.
[10]靖向党,于波,代国忠,等.城市垃圾填埋场水泥基防渗浆材的研究[J].探矿工程(岩土钻掘工程),2006(10):5-7.
[11]靖向党,于波,谢俊革.垃圾填埋场防渗浆材对污染物的阻滞规律[J].环境科学与技术,2012,35(2):46-50.
[12]JING Xiang-dang,YU Bo,XIE Jun-ge.Retartation performance to pollutants of antiseepage slurry for waste landfill sites[J].Advanced Materials Research(Progress in Environmental Science and Engineering Part 3),2012,356-360:1551-1555.
[13]JING Xiang-dang,YU Bo,XIE Jun-ge,etc.Research of antiseepage slurry used in waste landfill sites and it's properties[C]//IEEE.2011International Conference on Remote Sensing Environment and Transportion Engineering.Nanjing:IEEE,2011:622-625.
[14]靖向党,于波,刘自放,等.柔壁渗透仪的研制[J].长春工程学院学报:自然科学版,2010,11(3):19-23.
[15]靖向党,于波,谢俊革.柔壁渗透仪的试验研究[J].探矿工程(岩土钻掘工程),2008(9):28-31.
[16]靖向党,何世鸣,陈鹏,等.柔壁渗透仪在防渗工程中的应用[J].探矿工程(岩土钻掘工程),2012,39(2):53-55.
[17]靖向党,于波.柔壁渗透测试仪:中国,2012 2 008872.9[P].2012-01-05.
[18]靖向党,于波.柔壁渗透试验气水隔离供液装置:中国,200920094935.5[P].2010-09-01.
[19]靖向党,于波.加压式柔壁渗透仪:中国,200520091576.X[P].2006-10-11.
[2]熊孝波,施斌,张凌.国外城市垃圾填埋场岩土工程研究的最新进展[J].工程地质学报,2000,8(3):345-350.
[3]赵雅芝,杨凤林,薛大明,等.粉煤灰、建筑垃圾、黏土对垃圾渗透液吸附行为的研究[J].环境保护科学,1994,20(4):32-36.
[4]朱国营,赵永胜.粉煤灰在垃圾淋滤液循环处理中的作用[J].长春科技大学学报,2000,30(3):262-265.
[5]成春奇.黏土对重金属污染物容纳阻滞能力研究[J].水文地质工程地质,2001(6):12-14.
[6]李红霞,何少华,袁华山,等.膨润土对废水中有机污染物的吸附[J].矿业工程,2006,4(4):59-61.
[7]刘安涟.利用粉煤灰处理电厂生活污水的试验研究[J].湖北电力,1998,22(2):41-44.
[8]靖向党,于波,马戈,等.城市垃圾填埋场黏土基防渗浆材的实验研究[J].水文地质工程地质,2007(5):94-97.
[9]靖向党,于波,谢俊革,等.城市垃圾填埋场防渗浆材的实验研究[J].环境工程,2009,27(1):70-73.
[10]靖向党,于波,代国忠,等.城市垃圾填埋场水泥基防渗浆材的研究[J].探矿工程(岩土钻掘工程),2006(10):5-7.
[11]靖向党,于波,谢俊革.垃圾填埋场防渗浆材对污染物的阻滞规律[J].环境科学与技术,2012,35(2):46-50.
[12]JING Xiang-dang,YU Bo,XIE Jun-ge.Retartation performance to pollutants of antiseepage slurry for waste landfill sites[J].Advanced Materials Research(Progress in Environmental Science and Engineering Part 3),2012,356-360:1551-1555.
[13]JING Xiang-dang,YU Bo,XIE Jun-ge,etc.Research of antiseepage slurry used in waste landfill sites and it's properties[C]//IEEE.2011International Conference on Remote Sensing Environment and Transportion Engineering.Nanjing:IEEE,2011:622-625.
[14]靖向党,于波,刘自放,等.柔壁渗透仪的研制[J].长春工程学院学报:自然科学版,2010,11(3):19-23.
[15]靖向党,于波,谢俊革.柔壁渗透仪的试验研究[J].探矿工程(岩土钻掘工程),2008(9):28-31.
[16]靖向党,何世鸣,陈鹏,等.柔壁渗透仪在防渗工程中的应用[J].探矿工程(岩土钻掘工程),2012,39(2):53-55.
[17]靖向党,于波.柔壁渗透测试仪:中国,2012 2 008872.9[P].2012-01-05.
[18]靖向党,于波.柔壁渗透试验气水隔离供液装置:中国,200920094935.5[P].2010-09-01.
[19]靖向党,于波.加压式柔壁渗透仪:中国,200520091576.X[P].2006-10-11.