论文部分内容阅读
为评估尾矿坝地震液化侧向位移值,评价坝体地震安全状态,有必要建立适用的地震液化侧向位移分析方法。基于现场标准贯入测试数据,分析地震液化敏感性。采用简化方法进行液化评价。根据抗液化安全系数与最大剪切应变间的关系,建立尾矿坝地震液化侧向位移计算式。归纳分析已有7个堤坝液化破坏实例。提出针对中小型尾矿坝,区分地震液化有限变形和整体破坏的极限值(即破坏判据)为2.0 m。选取2座上游法尾矿坝,采用新建方法进行实证分析。结果表明,预测液化侧向位移值与现场实测评估结论较吻合。
In order to evaluate the lateral liquefaction displacement of tailings dam and evaluate the seismic safety status of the dam, it is necessary to establish a suitable seismic liquefaction lateral displacement analysis method. Based on site-standard penetration test data, seismic liquefaction susceptibility is analyzed. A simplified method for liquefaction evaluation. According to the relationship between the liquefaction safety factor and the maximum shear strain, the liquefaction lateral displacement formula of tailing dam is established. Thirteen examples of liquefaction damage have been summarized. Proposed for the tailings dam, to distinguish the limit of liquefaction of the finite deformation and the overall damage (that is, damage criteria) of 2.0 m. Two upstream tailings dams are selected and the new method is used for empirical analysis. The results show that the predicted lateral displacement of liquefaction agrees well with the field evaluation.