节理岩质边坡变形破坏的RFPA模拟分析

利用基于强度折减法的RFPA-Slope,对节理岩质边坡的稳定性进行了模拟分析,直观地得到了坡体的滑移破坏面,同时求得安全系数·研究了岩体中节理贯通率、几何位置、倾角以及节理间岩桥长度等因素对边坡变形破坏模式、安全系数大小的影响,证明了节理是控制岩质边坡破坏的主要因素·RFPA-Slope对节理岩质边坡破裂过程的模拟对于理解边坡的破坏形成机理具有重要意义,算例的模拟分析说明RFPA-Slope能够较为准确地预测节理边坡潜在破坏面的形状与位置及相应的稳定安全系数,对于复杂的边坡稳定性分析是实用的·

Numerical Simulation and Analysis of Deformation and Failure of Jointed Rock Slopes by RFPA-Slope

The stability analysis of jointed rock slope was conducted by using the software RFPA-Slope that is incorporated with strength reduction theory. The failure surface of slope and relevant safety factor were thus displayed directly. The influences of joint connectivity, location, obliquity and rock bridge length on the failure mode and magnitude of safety factor were investigated. It was proved that the joints were the major influencing factor on the failure mode of jointed rock slope. In addition, the failure process as shown by RFPA-Slope is significantly meaningful for the investigation of failure mechanism of jointed rock slope. The case study indicates that RFPA-Slope can rather rationally predict both safety factor of slope and the corresponding shape and position of the potential slip surface. Accordingly, practical applicability of the proposed technique to complicated cases is verified.