Deformation characteristics and stability evaluation of a heavily loosened rock slope

被引：0

作者：

Chen, Tao ^{[1
]}

Deng, Jianhui ^{[1
]}

Li, Linrui ^{[1
]}

Liu, Tiexin ^{[1
]}

Zhang, Zhenghu ^{[1
]}

Pu, Xiaofeng ^{[2
]}

机构：

[1] State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610065, Sichuan

[2] PowerChina Chengdu Engineering Corporation Limited, Chengdu, 610072, Sichuan

来源：

Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2015年 / 34卷

关键词：

Crack causes; Deformation characteristic; Huangjinping hydropower station; Monitoring analysis; Slope engineering; Stability evaluation;

D O I：

10.13722/j.cnki.jrme.2014.0800

中图分类号：

学科分类号：

摘要：

The intake slope of Huangjinping hydropower station, which cracked during excavation, was used as an example, to analyze the deformation characteristics of heavily loosened rock slope, based on its geological conditions and monitoring data. Then the crack causes of natural and cut slopes were given. At last, combined with the numerical method the effectiveness of supporting structure and the stability of the slope were evaluated. Results show that, the cracks both in the natural slope and in the cut slope are the result of structural adjustment of the rock mass due to the further loosening by excavation disturbance. However, the natural slope cracks is due to the adjustment of the whole slope mass and reflect the overall deformation and stability of the slope, while the cut slope cracks are due to the extrusion of rock blocks in a weakly supported zone and reflect local deformation and stability, i.e. the cracks are not directly related, and the slope is still in the deformation stage, no persistent slip surface is ever generated. Earlier supporting measures, mainly cable bolts, formed a reinforcing body of around 50 m thick horizontally near the slope surface, and function as a retaining wall. Supplementary cable bolts are deeper and can more effectively control the slope deformation. The slope deformation is converging gradually and its factors of safety meet the requirement of design code under all working conditions. ©, 2015, Academia Sinica. All right reserved.

引用

页码：2607 / 2616

页数：9

共 15 条

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