考虑水力耦合效应的填埋场覆盖层基质吸力解析解  

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

作　　者：陈检 秦卫星[1,2] 曹新红 徐瑞麟 熊轩宇 CHEN Jian;QIN Weixing;CAO Xinhon;XU Ruilin;XIONG Xuanyu(School of Hydraulic and Environmental Engineering,Changsha University of Science&Technology,Changsha 410114,China;Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province,Changsha 410114,China;College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310056,China)

机构地区：[1]长沙理工大学水利与环境工程学院,湖南长沙410114 [2]水沙科学与水灾害防治湖南省重点实验室,湖南长沙410114 [3]浙江大学建筑工程学院,浙江杭州310056

出　　处：《吉首大学学报(自然科学版)》2025年第2期45-50,共6页Journal of Jishou University(Natural Sciences Edition)

基　　金：国家自然科学基金资助项目(51208062,51508039);湖南省自然科学基金资助项目(2022JJ30601)。

摘　　要：雨水入渗会改变填埋场覆盖层中的基质吸力.为了探究考虑水力耦合效应的覆盖层基质吸力演化特性,基于Fredlund非饱和土本构模型构建了水力耦合作用下的覆盖层水分迁移模型,并引入Gardner土-水特征曲线模型,利用傅里叶积分变换法推导出考虑水力耦合效应的覆盖层基质吸力解析解.基于该解析解对比分析了考虑和不考虑水力耦合效应的覆盖层基质吸力演化特性,发现考虑水力耦合效应的覆盖层基质吸力的减小速度和变化幅度均明显小于不考虑水力耦合效应的情况.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.

关 键 词：填埋场覆盖层 水力耦合 基质吸力 解析解 

分 类 号：TU43[建筑科学—岩土工程]