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目前,边坡稳定问题的关键就是如何寻找最危险滑动面。最危险滑动面并不代表是有最大滑坡推力的滑动面。而在对边坡进行处治时,滑坡推力是最重要的参数之一。为了得到所有潜在滑动面中最大的滑坡推力,该文提出了最大滑坡推力滑动面的概念。以圆弧滑动面为研究对象,采用模式搜索法进行最危险滑动面的搜索,并采用不平衡推力法计算所有潜在滑动面的剩余下滑力。通过对所有潜在滑动面对应的剩余下滑力的比较,找出最大滑坡推力滑动面。算例结果表明:最大滑坡推力滑动面是存在的,其比最危险滑动面有更大的剩余下滑力,同时还有更大的滑动范围。因此,最大滑坡推力滑动面在边坡处治设计时是有必要考虑和重视的。
At present, the key of the slope stability problem is how to find the most dangerous sliding surface. The most dangerous sliding surface does not mean that there is a sliding surface of the greatest landslide thrust. Landslide thrust is one of the most important parameters when dealing with slopes. In order to obtain the maximum landslide thrust among all the potential slip surfaces, this paper presents the concept of maximum slip surface thrust lands. Taking the arc sliding surface as the research object, the pattern search method was used to search the most dangerous sliding surface, and the unbalance thrust method was used to calculate the remaining sliding force of all potential sliding surfaces. Find the maximum landslide thrust slip surface by comparing the remaining slip forces for all potential slip surfaces. The results show that the maximum landslide thrust sliding surface exists, which has larger residual sliding force than the most dangerous sliding surface, and has larger sliding range at the same time. Therefore, the maximum landslide thrust sliding surface design in the slope when it is necessary to consider and attention.