地震条件下不同类型边坡的稳定性研究

用sarma法计算了不同坡高、不同坡角、不同岩体和结构面力学参数的边坡在不同水平地震加速度系数下对应的安全系数,建立了一套能方便快捷地查询边坡安全系数的系统,为各种类型边坡的稳定性评价提供了依据。此外,还分析了坡高、坡角、地震加速度系数、岩体和结构面力学参数对地震边坡安全系数的影响。通过对比查询系统得到的安全系数与其他已有的地震边坡稳定性评价方法得到的安全系数的差异,得出用这种新安全系数查询方法得到的安全系数与其他安全系数计算方法得出的安全系数相差不大。通过将这种新的地震边坡稳定性评价方法应用到几个实际边坡中,所得到的评价结果与滑坡的实际发生情况一致。

STUDY ON STABILITY OF DIFFERENT TYPES OF SLOPES UNDER SEISMIC CONDITION

In this paper, the method of sarma is used to calculate the safety factor of different types of slopes that have different slope height, different slope angle and different mechanics parameters of rock and structural plane under the condition of different horizontal seismic acceleration coeffient, and then a suit of safety factor search system that can be used to look up the safety factor of slopes under seismic condition is established. The results can provide basis for stability estimation of different types of slopes. In addition, the influence of slope height, slope angle, seismic acceleration coeffient, and mechanics parameters of rock and structural plane on the safety factor of seismic slope is also analyzed. Moreover, by comparing the safety factor that is look up in the safety factor search system with the factors that are calculated by other methods, the result shows that the difference between the safety factor that is look up in the safety factor search system and the factors that are calculated by other methods is small, and by using the safety factor search system to evaluate the safety of the actual slopes under seismic condition, the results shows that the evaluation stability is consistent to the actual stability of the slopes.