关于强度折减法分析崩坡积体失稳判据的探讨

摘要

某水电工程崩坡积体规模大，距坝址近，地质条件复杂，其稳定性对枢纽建筑物至关重要。采用有限元强度折减法对崩坡积体稳定性进行评价，计算不同安全判据下崩坡积体的安全系数，并与刚体极限平衡法计算结果进行对比，最终建议采用多种安全判据同时判断崩坡积体稳定性。分析结果对崩坡积体安全性做出了定量评价，对崩坡积体的支护处理具有一定的指导意义。%The colluvial slope of a hydropower project, closed to the dam site, is large in scale, complicated in geological con-dition and its stability is very important to the main buildings of the hydro-complex. The slope stability is evaluated with strength reduction FEM and the safety coefficients by different instability criterions are discussed and compared with the result by limit e-quilibrium method. It is recommended that the colluvial slope stability should be judged by using a variety of safety criterions. The quantitative evaluation on colluvial slope safety is significant to the colluvial slope supporting.