关键词: 倾倒破坏, 传递系数法, 解析方法, 滑动-倾倒组合破坏

Abstract: An analytical solution is developed for sliding-toppling complex failure of rock slope, based on the corresponding failure mechanisms and the transfer coefficient method for entire block toppling failure. Moreover, the influences of initial sliding force from unstable set of rock slope and the cohesive force of block base are also analyzed. In order to have uniform expressions, the variables are expressed by the geomechanical parameters of the slope and the serial number of the block in this proposed method. Consequently, the stability of sliding-toppling complex failure of rock slope can be easily analyzed using a Microsoft Excel spreadsheet. This proposed method is applied to a practical rock slope. The results show that the cohesion of block base has significant influence on the failure model of susceptible toppling block, with increasing of the cohesion, the area of block toppling failure increases and the area of sliding failure obviously decreases. It is good agreement with previous research of block toppling failure that the relative angle of block base have significant influence on the entire stability of the complex rock slope; and the safety factor of the rock slope decreases with increasing of the relative angle of block base.

Key words: toppling failure, transfer coefficient method, analytical method, sliding-toppling complex failure