关键词: 变形体, 稳定性分析, FLAC-3D, 强度折减法

Abstract: In order to determine the stability of deformation mass No. 1 of Wuqiangxi hydropower station, FLAC-3D was used to carry out three-dimensional numerical simulation analysis. The displacement and stability safety coefficient of the slope, the maximum shear strain increment of the slope and the slope sliding surface position were obtained. The analysis results showed that the safety coefficient of 3-3' section was relatively small, which was the main potential sliding direction of the slope, and the maximum deformation of the slope also appeared in the 3-3' section. The slope deformation was mainly in the vertical direction, followed by the horizontal deformation in the direction of riverbed. The study showed that the deformation mass may be unstable, so the monitoring of deformation mass should be strengthened and necessary engineering measures should be taken to prevent the occurrence of instability.

Key words: deformation mass, stability analysis, FLAC-3D, strength reduction method