Analytical Solution of Matrix Suction for Landfill Cover Layer with Hydro-Mechanical Effect

doi:10.13438/j.cnki.jdzk.2025.02.006

Journal of Jishou University(Natural Sciences Edition) ›› 2025, Vol. 46 ›› Issue (2): 45-50.DOI: 10.13438/j.cnki.jdzk.2025.02.006

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Analytical Solution of Matrix Suction for Landfill Cover Layer with Hydro-Mechanical Effect

CHEN Jian,QIN Weixing,CAO Xinhon,XU Ruilin,XIONG Xuanyu

(1.School of Hydraulic and Environmental Engineering,Changsha University of Science & Technology,Changsha 410114,China;2.Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province,Changsha 410114,China;3.College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310056,China)

Online:2025-03-25 Published:2025-04-30

Abstract

Abstract: Rainwater infiltration changes the size and distribution of matrix suction in landfill cover layer.To investigate the evolution characteristics of matric suction in the cover layer with hydraulic coupling effects,a water transport model for a landfill cover layer under rainfall infiltration is established based on the Fredlund's unsaturated soil constitutive model.The Gardner soil-water characteristic function and Fourier integral transform are used to obtain a analytical solution of the transient matric suction during rainwater infiltration with hydro-mechanical effect.Based on this analytical solution,a comparative analysis was conducted on the differences in the evolution characteristics of matric suction in the cover layer with and without hydro-mechanical effects.It was found that the reduction rate and change amplitude of matric suction in the cover layer with hydro-mechanical effects were significantly lower than those without hydro-mechanical effects.

Key words: landfill cover layer, hydro-mechanical effect, matrix suction, analytical solution

CHEN Jian, QIN Weixing, CAO Xinhon, XU Ruilin, XIONG Xuanyu. Analytical Solution of Matrix Suction for Landfill Cover Layer with Hydro-Mechanical Effect[J]. Journal of Jishou University(Natural Sciences Edition), 2025, 46(2): 45-50.

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Analytical Solution of Matrix Suction for Landfill Cover Layer with Hydro-Mechanical Effect

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