栗西沟尾矿坝地震响应及液化分析

The response to earthquake and liquefaction analysis of Lixigou tailing dam

采用不排水有效应力法,利用Geo-slope软件,对金堆城栗西沟尾矿坝进行了地震响应的综合分析与液化计算。结果显示:a.栗西沟尾矿坝在静态条件下是稳定的;b.在7度地震条件下,尾矿坝的加速度反应较小,其放大倍数为2.204;c.栗西沟尾矿坝内动剪应力和动孔压绝大部分是随着地震历时的增加而逐渐增大;d.坝内孔压比都较小,抗液化安全系数较大,但局部液化区的存在,仍可能影响到整个坝体的安全性,应在液化区采取加固措施。

Using Geo-slope geotechnieal engineering software, the effective stress method without drainage is applied for the response to earthquake and analysis of liquefaction of Lixigou tailing dam, Jinduicheng. The results show that a. IAxigou tailing dam, Jinduicheng, is stability under static condition; b. the response to acceleration of the tailing dam is less and amplifies 2.204 times; e. the most of dynamic shear stresses and dynamic pore water pressure in the tailing dam increase with the increase of earthquake time; d. the lower pore water pressure and the larger safety coefficient against liquefaction in the tailing dam, but there are local liquefied zone in the tailing dam and will influence dam safe. It suggests that reinforcement may need to prevent from tailing dam failure in the liquefied zone.