PREDICTING LEAKAGE THROUGH COMPOSITE LANDFILL LINERS
PREDICTING LEAKAGE THROUGH COMPOSITE LANDFILL LINERS
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DOI：
10.1061/(asce)1090-0241(2001)127:6(510
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发表时间：
2001-06
影响因子：
3.9
通讯作者：
Gary J. Foose;C. Benson;T. Edil
中科院分区：
文献类型：
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作者：
Gary J. Foose;C. Benson;T. Edil
利用现有的分析模型和数值模型对具有不同特性的复合填埋衬垫渗漏进行了分析。采用三维数值模型对圆形缺陷渗漏进行分析，采用二维数值模型对缺陷接缝渗漏进行分析。用数值模型预测的泄漏率与用现有方程和分析模型预测的泄漏率进行了比较。这些比较表明，现有的方程和分析模型都有局限性，没有通用的方程或方法来预测泄漏率。为了克服现有方程和模型的一些不足，在数值模型的基础上建立了新的方程。建议使用新方程，现有方程和分析模型来预测土工膜覆盖压实土衬垫的厚复合衬垫和土工膜覆盖土工合成粘土衬垫的薄复合衬垫的泄漏率。
Leakage through composite landfill liners having various characteristics was analyzed using existing analytical and numerical models developed for the study. Three-dimensional numerical models were used to analyze leakage through circular defects and two-dimensional numerical models were used to analyze leakage from defective seams. Leakage rates predicted with the numerical models were compared to leakage rates predicted using existing equations and analytical models currently being used. These comparisons show that existing equations and analytical models all have limitations and no universal equation or method is available for predicting leakage rates. To overcome some of the deficiencies in the existing equations and models, new equations were developed based on results from the numerical models. Recommendations are made for using the new equations, existing equations, and analytical models to predict leakage rates in thick composite liners having a geomembrane overlaying a compacted soil liner and thin composite liners having a geomembrane overlaying a geosynthetic clay liner.