地震作用下土钉支护边坡稳定性分析

在考虑土钉对土质边坡稳定性影响的情况下,根据土体边坡滑移面的破坏模式、塑性极限理论以及拟静力法,建立了地震作用下土钉支护边坡稳定性模型,推导了边坡滑移面圆心位置与稳定系数之间的函数关系以及滑移面上耗散内能的计算表达式,并且采用遗传算法,实现了地震作用下土钉支护边坡的稳定性验算。结果表明:这种计算方法避免了在圆弧搜索中陷入局部最小值的缺点,可以考虑孔隙水压对稳定性的影响,对土质较均匀的黄土地区是适用的。

Stability Analysis of Slope Supported by Soil Nailing Retaining Wall Under Earthquake

Under the situation of considering the soil nailing effects on stability of soil slope,according to the damage mode of the slip surface of slope,the plastic limit theorem and pseudo static method,stability model of slope supported by soil nailing under earthquake was set up.The energy dissipation formula on slip surface and the function relationship between stability factor of safety and the center of circular slip surface were derived.Calculation of the stability of slip surface was carried out by using the genetic algorithm.The results show that the proposal method avoids the shortcoming which local minimum was obtained in circular arc search;it can consider the influence of pore water pressure on stability and can be used in loess region with homogeneous soil suitably.