雾化雨入渗影响下的岩体边坡稳定性分析方法及其应用

Stability analysis method of rockmass slopes under atomized rain infiltration and its application

根据SARMA法的基本原理,考虑非饱和带基质吸力和暂态附加水荷载对岩体边坡安全稳定的影响,提出了能考虑雾化雨入渗效应的边坡稳定性分析方法—改进SARMA法。将提出的方法和编制的程序应用于紫坪铺#2导流洞出口高边坡工程,进行了边坡在泄洪雾化雨入渗影响下的安全稳定性计算与评价分析。计算结果表明:雾化雨入渗和入渗形成的暂态饱和区是影响边坡安全稳定的重要因素,边坡安全系数随雾化雨入渗显著下降。同时有效加强坡面防渗、最大限度减少坡面雨水的入渗,能有效提高和增强边坡的安全稳定性。

Based on the basic principle of SARMA method, a slope stability analysis method modified SARMA method which could take the influence of atomized rain infiltration into account, was put forward after considering the matrix suction of unsaturated zone and the temporary additional water load. This method and correlative program were applied to the stability evaluation analysis for the high slope of Zipingpu Hydropower Station under the influence of atomized rain Infiltration. It was shown that the atomized rain infiltration and temporary saturation zone were important factors influencing the safety of slope, and the safety factor of slope would greatly decrease due to the atomized rain infiltration. At the same time, reinforcing the seepage control of slope and reducing the infiltration of rain on slope could effectively improve the stability of slope.