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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。
The stability of rock and soil high slope has always been one of the most difficult problems in hydropower engineering research. In this paper, the stability of the right abutment slope of Laozaozui Hydropower Station is taken as the research object. According to the characteristics of obvious slope unloading, joint development and construction safety and stability, numerical analysis software FLAC3D and point safety factor method are used to analyze the natural conditions, The corresponding stability problems under different conditions such as the excavation conditions of the diversion tunnel spillway tunnels, the grading and reinforcement of slope grade excavation, and the rainfall condition after the completion of excavation are analyzed and studied. The results show that the stability of the right abutment slope of Laozhuozui Hydropower Station is not stable under the condition of unsupported reinforcement, which can not guarantee the safety during the construction period. However, the conditions under the strict grading and reinforcement are in a stable state and meet the requirements of engineering design standards Stable requirements.