关键词: 岩土工程, 水电站料场边坡, 开口线以外, 变形稳定性分析

Abstract: The excavation of material yard will affect the natural slope outside the opening line, and even cause landslides and other natural disasters, resulting in quality and safety accidents. Based on a large hydropower project in southwest China, the different stages of excavation process of material yard, the stability and deformation of a high and steep rock slope and the deformation of the cliff outside the opening line were studied by comparing the numerical simulation with the field monitoring data. The research shows that the joint model in UDEC is more convenient than the traditional method to analyze the stability of rock slope with multi-structural planes, and the simulation values are basically consistent with the monitoring values, which can reliably simulate the deformation of the slope. The reinforcement scheme of multi-joint high-steep slope has better effect of excavation and cutting, and when the excavation is more difficult, the supporting design should be considered. In the excavation project of material yard, the steep cliff outside the opening line has been deformed and destroyed, and the corresponding supporting design is needed.

Key words: geotechnical engineering, material yard side slope of hydropower station, outside the opening line, deformation stability analysis