Evolution laws of hydraulic parameters of red clay covers and design of seepage prevention

JIAO Wei-guo; LIU Zhen-nan; JI Yong-xin; ZHANG Yue; HE Ming-wei; LIAO Hua-rong

doi:10.11779/CJGE202201003

Volume 44 Issue 1

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Chinese Journal of Geotechnical Engineering > 2022 > 44(1): 45-52. > DOI: 10.11779/CJGE202201003

JIAO Wei-guo, LIU Zhen-nan, JI Yong-xin, ZHANG Yue, HE Ming-wei, LIAO Hua-rong. Evolution laws of hydraulic parameters of red clay covers and design of seepage prevention[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(1): 45-52. DOI: 10.11779/CJGE202201003

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Evolution laws of hydraulic parameters of red clay covers and design of seepage prevention

JIAO Wei-guo^{1, 3,},
LIU Zhen-nan^{1, 3},
JI Yong-xin²,
ZHANG Yue^{1, 3},
HE Ming-wei^{1, 3},
LIAO Hua-rong^{1, 3}

1.
School of Civil Engineering, Guizhou Institute of Technology, Guiyang 550003, China
2.
Engineering Technology Research Institute (Technology Center) of Chinaconstruction Fourth Engineering Division Co., Ltd., Guangzhou 510665, China
3.
Rural construction Engineering Technology Research Center of Guizhou Institute of Technology, Guiyang 550003, China

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Received Date: July 06, 2020
Available Online: September 22, 2022

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Abstract

Abstract

Through the laboratory unit and in-situ tests in landfill site, the hydraulic parameters of red clay soil covers have been monitored for more than five years on two different time scales of construction and long-term service. The degradation laws of hydraulic parameters from laboratory to field as well as from construction to long-term service are analyzed and compared. The results show that: (1) During the five years of long-term service, the infiltration coefficient of red clay covers without vegetation changes from 10^-7 cm/s to 10^-3 cm/s, with the variation fluctuated by 5 orders of magnitude, and the infiltration coefficient with vegetation is 2 orders of magnitude from 10^-7 cm/s to 10^-6 cm/s. (2) The macropores in the covers gradually increase in the long-term service of natural climate, and the excessive rainfall (such as rainstorm) leads to the decrease of water storage capacity of soil overburden. In engineering design, it should be adjusted according to the local rainfall parameters. (3) With the repeated cycles of moisture absorption and desorption, the water storage capacity is related to the initial matrix suction and path of moisture absorption before rainfall. The design of the main moisture absorption curve with the starting point of laboratory moisture absorption (initial matric suction) of -1500 kPa is conservative, and the results are relatively safe.
- tailings stockyard,
- landfill,
- soil cover,
- vegetation soil,
- long-term service,
- hydraulic parameter,
- vegetation root system,
- design of seepage prevention

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References (17)

References

[1]	CHEN C. Meteorological Conditions for Design of Monolithic Alternative Earthen Covers(AEFCs)[D]. Madison: University of Wisconsin, 1999.
[2]	BENSON C H, ALBRIGHT W H, ROESLER A C, et al. Evaluation of final cover performance: Field data from the Alternative Cover Assessment Program (ACAP)[C]// Proceedings of Waste Management. 2002.
[3]	ZHANG Wen-jie, GENG Xiao, Performance and mechanism of capillary-barrier evaportranspiration cover of landfills[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(3): 454–459. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC202102002.htm
[4]	张文杰, 林午, 董林兵. 垃圾填埋场毛细阻滞型腾发封顶模型试验[J]. 岩土力学, 2014, 35(5): 1263–1268. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201405007.htm ZHANG Wen-jie, LIN Wu, DONG Lin-bing. Model test of a capillary barrier evapotranspiration cover for landfills[J]. Rock and Soil Mechanics, 2014, 35(5): 1263–1268. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201405007.htm
[5]	ALBRIGHT W H, BENSON C H, GEE G W, et al. Field water balance of landfill final covers[J]. Journal of Environmental Quality, 2004, 33(6): 2317–2332. doi: 10.2134/jeq2004.2317
[6]	ALBRIGHT W H, BENSON C H, GEE G W, et al. Field performance of a compacted clay landfill final cover at a humid site[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2006, 132(11): 1393–1403. doi: 10.1061/(ASCE)1090-0241(2006)132:11(1393)
[7]	NI J J, LEUNG A K, NG C W W, et al. Investigation of plant growth and transpiration-induced matric suction under mixed grass–tree conditions[J]. Canadian Geotechnical Journal, 2017, 54(4): 561–573. doi: 10.1139/cgj-2016-0226
[8]	BENSON C H, SAWANGSURIYA A, TRZEBIATOWSKI B, et al. Postconstruction changes in the hydraulic properties of water balance cover soils[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2007, 133(4): 349–359. doi: 10.1061/(ASCE)1090-0241(2007)133:4(349)
[9]	VAN GENUCHTEN M T. A closed-form equation for predicting the hydraulic conductivity of unsaturated soils[J]. Soil Science Society of America Journal, 1980, 44(5): 892–898. doi: 10.2136/sssaj1980.03615995004400050002x
[10]	焦卫国, 季永新, 张玥, 等. 红黏土土质覆盖层水力参数随服役时间演变规律分析[J]. 岩土工程学报, 2021, 43(6): 1059–1068. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC202106013.htm JIAO Wei-guo, JI Yong-xin, ZHANG Yue, et al. Evolution of hydraulic parameters of red clay cover with service time [J]. Chinese Journal of Geotechnical Engineering, 2021, 43(6): 1059–1068. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC202106013.htm
[11]	谭邦宏. 红黏土作为垃圾填埋场防渗垫层的研究进展[J]. 四川建筑, 2015, 35(6): 107–108, 111. doi: 10.3969/j.issn.1007-8983.2015.06.039 TAN Bang-hong. Research progress of red clay as impermeable cushion in landfill[J]. Sichuan Architecture, 2015, 35(6): 107–108, 111. (in Chinese) doi: 10.3969/j.issn.1007-8983.2015.06.039
[12]	彭玉林, 龚爱民, 孙海燕, 等. 垃圾填埋场中改性红黏土防渗料的性能研究[J]. 人民长江, 2011, 42(增刊2): 163–165, 169. https://www.cnki.com.cn/Article/CJFDTOTAL-RIVE2011S2057.htm PENG Yu-lin, GONG Ai-min, SUN Hai-yan, et al. Study on properties of modified red clay anti-seepage materials in landfill sites[J]. Yangtze River, 2011, 42(S2): 163–165, 169. (in Chinese https://www.cnki.com.cn/Article/CJFDTOTAL-RIVE2011S2057.htm
[13]	王云, 关爱军, 沈峰, 等. 红黏土路堤边坡降水影响深度模拟分析[J]. 公路工程, 2015, 40(5): 50–55. doi: 10.3969/j.issn.1674-0610.2015.05.012 WANG Yun, GUAN Ai-jun, SHEN Feng. Simulation analysis on the precipitation influence depth of laterite soil embankment slope[J]. Highway Engineering, 2015, 40(5): 50–55. (in Chinese) doi: 10.3969/j.issn.1674-0610.2015.05.012
[14]	张文杰, 董林兵, 王顺玉. 山谷型填埋场汇水区域径流补给规律研究[J]. 土木工程学报, 2011, 44(增刊2): 173–176. https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC2011S2042.htm ZHANG Wen-jie, DONG Lin-bing, WANG Shun-yu. Investigation on water inflow from the catchment area of a valley-type landfill[J]. China Civil Engineering Journal, 2011, 44(S2): 173–176. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC2011S2042.htm
[15]	冶运涛, 伍靖伟, 王兴奎. 双套环测定土壤渗透系数数值模拟分析[J]. 灌溉排水学报, 2007, 26(3): 14–18. https://www.cnki.com.cn/Article/CJFDTOTAL-GGPS200703003.htm YE Yun-tao, WU Jing-wei, WANG Xing-kui. Numerical simulation of double-ring measuration on hydraulic conductivity[J]. Journal of Irrigation and Drainage, 2007, 26(3): 14–18. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-GGPS200703003.htm
[16]	LU N, W LIKOS J W. Unsaturated Soil Mechanics[M]. Beijing: Higher Education Press, 2012.
[17]	张雪东, 赵成刚, 刘艳, 等. 土水特征曲线(SWCC)的滞回特性模拟研究[J]. 工程地质学报, 2010, 18(6): 920–925. doi: 10.3969/j.issn.1004-9665.2010.06.017 ZHANG Xue-dong, ZHAO Cheng-gang, LIU Yan, et al. Simulation and hysteresis model for soil-water characteristic curves[J]. Journal of Engineering Geology, 2010, 18(6): 920–925. (in Chinese) doi: 10.3969/j.issn.1004-9665.2010.06.017