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结合某垃圾填埋场工程 ,利用表面波频谱分析法 (SASW )测试垃圾填埋体的剪切波速 ,得到了用于静动力响应分析的填埋体参数。在假定地表降水入渗为填埋场垃圾土体唯一补给来源的前提下 ,提出了确定浸润线自由面的方法 ,通过静力和动力有限元计算 ,对某填埋场边坡进行了稳定分析。对最危险滑动面的位置分析后发现 ,在地震过程中 ,滑动面的位置比较集中。在此基础上 ,对Newmark方法进行了改进 ,采用圆弧滑动面 ,得到了填埋场在地震作用下的永久位移。实例分析表明 ,垃圾在填埋过程中的初始压实 ,对埋场的地震稳定具有重要意义。
Combined with a landfill project, the shear wave velocity of the landfill was measured by surface wave spectrum analysis (SASW), and the parameters of the landfill for static and dynamic response analysis were obtained. Based on the assumption that ground surface infiltration is the sole source of refuse landfill, a method to determine the free surface of infiltration line is put forward. Through the static and dynamic finite element analysis, the slope of a landfill is analyzed stably . After analyzing the position of the most dangerous sliding surface, it is found that the location of the sliding surface is more concentrated during the earthquake. On this basis, the Newmark method is improved, and the arc-slip surface is used to obtain the permanent displacement of the landfill under the earthquake. The case study shows that the initial compaction of rubbish in landfill process is of great significance to the earthquake stability of landfill.