Stability Assessment of Ten Large Landfill Failures
Stability Assessment of Ten Large Landfill Failures
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DOI：
10.1061/40515(291)1
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发表时间：
2000-07
期刊：
影响因子：
--
通讯作者：
R. Koerner;T. Soong
中科院分区：
文献类型：
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作者：
R. Koerner;T. Soong
本文介绍并分析了10个大型固体废物填埋场。五个是无衬里或有土壤衬里的，五个是用一种或多种土工合成材料衬里的。通过调整变量(主要是界面剪切强度)的3-D计算机代码对案例进行分析，得出安全系数(FS)等于1.0。然后应用每个站点唯一的触发机制，导致FS小于1.0。然后在2-D计算机代码中使用相同的变量和触发机制，FS值进一步减少不同的量。三维安全系数与二维安全系数之比称为楔形系数。得出的结论如下：(I)界面剪切强度是改变FS值的首要考虑因素。准确的决心怎么强调都不为过。(Ii)触发机制均与液体有关，即废物体内的渗滤液积聚、土工膜下的湿粘土或地基土过湿。(3)在没有触发机制的情况下，所有病例的平均楔形系数为1.24。
This paper presents and analyzes ten large solid waste landfills. Five are unlined or soil lined, and five are lined with one or more geosynthetic materials. The case histories are analyzed by a 3-D computer code adjusting variables (mainly interface shear strength) to arrive at a factor-of-safety (FS) equal to 1.0. A triggering mechanism, unique to each site, is then applied resulting in an FS less than 1.0. The same variables and triggering mechanisms are then used in a 2-D computer code with FS-values further decreasing by different amounts. The ratio of 3-D to 2-D factors-of-safety is called a wedge factor. Conclusions reached are as follows: (i) Interface shear strengths are the overriding considerations in varying FS-values. Accurate determination cannot be overemphasized. (ii) The triggering mechanisms were all liquid related, i.e., leachate buildup within the waste mass, wet clay beneath the geomembrane, or excessively wet foundation soil. (iii) The average wedge factor of all case histories without, then with, the triggering mechanisms is 1.24.