地震荷载下露天矿边坡动力稳定性模拟分析

Simulation Analysis of Dynamic Stability of Strip Mine Slope under Earthquake Loads

以某风积土边坡为研究对象,通过对模型进行简化,研究了静荷载和动荷载荷载作用引起风积土的边坡静力安全系数、边坡动力安全系数、屈服地震系数以及破坏类型和动力稳定性判别,探讨了该边坡在地震荷载作用下产生的动力稳定性问题。研究结果表明,地震荷栽作用下此类边坡会因风积土液化而产生流滑破坏。应用ADINA软件对此边坡在地震荷载作用情况下进行了模拟,获得了动荷载作用前后的位移与应力变化关系和此边坡的动力动力安全系数。据此判别出该边坡在EI Centro波动荷载作用下会因风积土液化而产生流滑破坏。该研究结果对风积土边坡的动力稳定研究具有重要的参考价值。

Takes a infinite slope of aeolian Soil as the research object, Static safety factor, dynamic safety factor and yield factor of earthquake of aeolian soil slope which aroused by static loads and dynamic loads have been studied. The damage type and how to evaluate dynamic stability have also been studied. Then the settling stability problem of infinite slope is discussed under vibration or earthquake loads. The results show that the slope will produce fluidized landslide under earthquake loads. Then this slope are simulated by ADINA under the earthquake loads and the relationship between displacement and stress are obtained and the dynamic safety factor Fd has been determined. The results show that this slope under EI Centro wave loads will produce fluidized landslide because of the liquefaction of aeolian soil based on the simulation results. The results provide a reference value to dynamic stability of aeolian soil slope.