DEFORMATION MECHANISM AND STABILITY ANALYSIS OF LANDSLIDE UNDER IMPOUNDMENT AND CONSTRUCTION

LU Yongxing; XIAO Jianzhang; XU Chong; XIE Qizhi; YUAN Hua

doi:10.13544/j.cnki.jeg.2014.03.006

Volume 22 Issue 3

Jun. 2014

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LU Yongxing, XIAO Jianzhang, XU Chong, XIE Qizhi, YUAN Hua. 2014: DEFORMATION MECHANISM AND STABILITY ANALYSIS OF LANDSLIDE UNDER IMPOUNDMENT AND CONSTRUCTION. JOURNAL OF ENGINEERING GEOLOGY, 22(3): 386-395. doi: 10.13544/j.cnki.jeg.2014.03.006

Citation:

LU Yongxing, XIAO Jianzhang, XU Chong, XIE Qizhi, YUAN Hua. 2014: DEFORMATION MECHANISM AND STABILITY ANALYSIS OF LANDSLIDE UNDER IMPOUNDMENT AND CONSTRUCTION. JOURNAL OF ENGINEERING GEOLOGY, 22(3): 386-395. doi: 10.13544/j.cnki.jeg.2014.03.006

Citation:

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DEFORMATION MECHANISM AND STABILITY ANALYSIS OF LANDSLIDE UNDER IMPOUNDMENT AND CONSTRUCTION

doi: 10.13544/j.cnki.jeg.2014.03.006

1.
Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029;
2.
University of Chinese Academy of Sciences, Beijing 100049;
3.
State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038;
4.
Key Laboratory of Active Tectonics and Volcano, Institute of Geology, Chinese Earthquake Administration, Beijing 100029;
5.
Zhongnan Engineering Corporation, Changsha 410014

Funds:

Received Date: 2013-02-11
Rev Recd Date: 2014-04-10
Publish Date: 2014-06-25

Abstract

Abstract

The Guanyinping landslide turned up evident deformation. There were two possible cause factors. One is the first-stage impoundment of Xiangjiaba hydropower station and the other is the rebuilding construction of the the 307 provincial road whose cutting and filling project had just been finished. The real cause triggering the landslide deformation remains to be controversial between the reservoir impoundment and the construction of the rebuilt road. Based on the landslide deformation behaviors and the results of in-situ monitoring, the deformation mechanism of the landslide is discussed specifically in this paper. In order to analyze the stability of the landslide, a 2D model is developed by using the finite element numerical simulation. The factors of safety under various operational conditions are calculated through shear strength reduction method. The result shows the following three points:(1)Construction of the rebuilt road and the rising of reservoir water level are both against the whole stability of the landslide, especially the rising of reservoir water level;(2)After the construction of the rebuilt road and the first-stage impoundment, the landslide is in the critical stable state. Supposing no reinforcement measure is taken, the factor of safety reduces continually under the second-stage impoundment and the normal impoundment;(3)The treatment measure of cutting slope and unloading is presented. The factor of safety can meet the requirements of norms under the second-stage impoundment and the normal impoundment after being controlled. The relevant conclusions and methods proposed can provide the references for the treatment for the similar landslides.
- Reservoir bank landslide,
- Construction of the rebuilt road,
- Reservoir impoundment,
- Deformation mechanism,
- Stability

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References(1)

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