老虎嘴水电站右坝肩边坡稳定性研究

岩土高边坡稳定性问题一直是水电工程研究的重难点之一。本文以老虎嘴水电站右坝肩边坡稳定性作为研究对象,针对边坡卸荷显著、节理发育、施工安全稳定问题突出的特点,采用数值分析软件FLAC3D,结合点安全系数法,对天然情况、导流洞泄洪洞开挖工况、边坡分级开挖分级加固工况以及开挖完成后降雨工况等不同状况下的相应稳定性问题进行了分析研究。结果表明,老虎嘴水电站右坝肩边坡在无支护加固状况下稳定性较低,不能保证施工期的安全,但在严格分级加固后各工况处于稳定状态,满足工程设计标准下的工程稳定要求。

STUDY ON THE STABILITY OF THE RIGHT ABUTMENT SLOPE OF LAOHUZUI HYDROPOWER STATION

The stability problem of high rock slope is one of the most important research projects of hydropower engineering.The stability of right abutment slope in the Laohuzui Hydropower Station is regarded as the research object.According to the characteristics of slope unloading significantly, joint development, construction safety and stability problems, by using the numerical analysis software FLAC3D, combining point safety factor method, to analyze the corresponding stability problem in the natural condition, the diversion tunnel of Hongdong drainage excavation condition and slope excavation hierarchical reinforcement conditions after excavation and rainfall conditions.The results show that the Laohuzui Hydropower Station dam abutment without reinforcement under the condition of low stability, cannot guarantee the safety during construction, but in the condition of strict grading in a stable state after reinforcement, meet the engineering requirements under stable engineering design standards.