JIANG Long, WANG Xiaogang, GE Huaiguang, SUN Jianhui, ZHU Zhaohui

China Institute of Water Resources and Hydropower Research, Beijing 100038, China

Abstract: Most of hydropower stations are built in the mountain valley region with complex geological conditions, and so it is inevitable to involve some engineering geological problems of high slope stability in building a variety of high dams. This paper has systematically studied stability and early warning of high engineering slope in depth, and established the early-warning model and the health diagnosis system. The results show that: ① displacement deformation increases with time and decreases with increasing depth. The change rules of performance are deformation rapidly increases in the early, and slowly increases in the medium, and becomes gradually stable in the later. ② through stability analysis of Mayanpo slope by strength reduction FEM, the stability coefficient before treatment and after are 1.05 and 1.72. ③ using boundary displacement method, the early warning of slope landslide are analyzed with equivalent plastic strain region through as a criterion. The early-warning monitoring system of slope are established, which based on double controlling indicators of displacement deformation amount and safety factor.

Key words: Xiangjiaba Hydropower Station; Mayanpo slope; slope stability; landslide early warning; three-dimensional numerical model

Published in: Journal of China Institute of Water Resources and Hydropower Research Vol. 13 No.2, April, 2015