摘要
强度折减法在边坡稳定性分析中得到了广泛的应用,关于折减系数的选取有多种方法,但是哪种方法更合理、可靠没有定论。在详细分析各折减方法基本原理的基础上,结合具体算例,首先分析了等比例折减下不同坡比的边坡安全系数变化规律,其次分析了等比例折减法和不同双强度折减法计算边坡稳定性的差异,同时对比分析了不同安全系数定义下的边坡稳定性情况。研究结果表明:双强度折减得到的临界滑动面范围要比等比例折减的范围大,而在不同安全系数定义中采用c-tanφ曲线分析得到的结果比其它定义方法得到的结果物理意义更明确、更符合边坡实际情况。
The strength reduction method has been widely used in slope stability analysis. There are many ways to choose the re- duction factor, but it is unknown which way is more reasonable and reliable. Based on the detailed analysis of the basic princi- ples of each reduction method and combined with concrete examples, the variation law of slope safety factors with different slope ratios for equal proportion reduction was firstly analyzed. Then, the difference of slope stability obtained by the equal pro- portion reduction method and different double-strength reduction method was analyzed. At the same time, the slope stability under different safety factors was compared. The results showed that the range of critical slip surfaces obtained by double strength reduction was larger than that of equal proportion reduction, and the results obtained by c-tan9 curve analysis had a clearer physical meaning and were more in line with the actual situation of the slope, compared with that obtained by other methods to define safety factor.
出处
《矿业研究与开发》
CAS
北大核心
2018年第1期67-70,共4页
Mining Research and Development
关键词
边坡稳定性
等比例折减
双强度折减
安全系数
Slope stability, Equal proportion reduction, Double-strength reduction, Safety factor
