【摘要】 采用弹塑性有限元法和强度折减法,对九甸峡水电站厂房后岩体边坡进行稳定性计算分析和评价。根据边坡工程地质条件以及开挖和支护加固过程建立了边坡分级开挖支护的准三维有限元分析模型。模拟了开挖和支护过程,计算分析了开挖完成、支护完成、降雨和地震条件下边坡的应力分布和稳定安全系数。结果表明,该边坡在加固前安全系数小,存在不稳定的可能性,支护加固后边坡的稳定安全系数有较大提高,可满足正常运用要求。更多还原

【Abstract】 Based on the elastic-plastic finite element method and strength reduction method,the stability of the rock slope behind the powerhouse of Jiudianxia hydroelectric station was studied and evaluated.According to the engineering geological condition and the excavation and support reinforcement process,the quasi-3D finite element analysis model of the slope which was supported was built.The excavation and support reinforcement process was simulated and the stress distribution and the stability safety factor were analyzed under the excavation,supporting,rainfall and earthquake.It is shown that the safety factor was small and the slope was instable before reinforcement,but after reinforcement the safety factor was significant improved and the slope can meet the challenge of normal operation.更多还原