Geohazard monitoring and risk management of high-steep slope in the Wudongde dam area

LI Bin; ZHANG Qing; WANG Wenpei; ZHAO Qisu; WANG Chenhui; HE Kai; GAO Yang; ZHANG Xiaofei

doi:10.12090/j.issn.1006-6616.2020.26.04.048

Volume 26 Issue 4

Aug. 2020

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Article Navigation > Journal of Geomechanics > 2020 > 26(4): 556-564

LI Bin, ZHANG Qing, WANG Wenpei, et al., 2020. Geohazard monitoring and risk management of high-steep slope in the Wudongde dam area. Journal of Geomechanics, 26 (4): 556-564. DOI: 10.12090/j.issn.1006-6616.2020.26.04.048

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Geohazard monitoring and risk management of high-steep slope in the Wudongde dam area

doi: 10.12090/j.issn.1006-6616.2020.26.04.048

LI Bin^{1, 2
,},
ZHANG Qing³,
WANG Wenpei⁴,
ZHAO Qisu⁵,
WANG Chenhui³,
HE Kai^{1, 2},
GAO Yang^{1, 2},
ZHANG Xiaofei³

1.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
2.
Key Laboratory of Neotectonic Movement & Geohazard, Beijing 100081, China
3.
China Center for Hydrogeology and Environmental Geology, China Geological Survey, Baoding 071051, Hebei, China
4.
China Institute of Geological Environment Monitoring, Beijing 100081, China
5.
909 Hydrogeology and Engineering Geological survey, Sichuan Bureau of Geology and Mineral Resources, Mianyang 621050, Sichuan, China

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Received: 2020-06-20
Revised: 2020-07-10
Published: 2020-08-01

Abstract

Abstract

Taking the high-steep slope of Shuidiantang of the Wudongde dam on the Jinsha River as an example, this paper explores systematically the early warning technology and risk management of the high-steep slope monitoring with a height of over 500 m. Rock mass collapse often occurs at slopes with the gradient greater than 70°, and it is difficult to identify. With the method of rock climbing technique, geological survey and geological mapping, the high precision identification and analysis of the dangerous rock mass is achieved. Totally, 178 dangerous rocks are identified. On the basis of this result, the distributed optical fiber strain monitoring and the pull-line displacement sensor of the fractured rock are distributed to monitor in real-time the deformation of the rock mass. The monitoring data are in agreement with the reality. Furthermore, six seismic monitoring stations were set up between the slope of the elevation of 580~1600 m. Many seismic acceleration data were caught, including that of the Wudongde earthquake on December 8, 2016 and the Ludian earthquake on March 12, 2017. On the basis of these data, the stability and dynamic response of the Wudongde earthquake on this high-steep slope are analyzed. The results show that this slope is in the basically stable state. The ideas and methods of high-steep slope warning and risk assessment of southwest hydropower stations are of reference significance.
- Southwest China,
- high-steep slope,
- geohazards,
- geological survey and recognition,
- monitoring and early warning,
- Wudongde dam

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Geohazard monitoring and risk management of high-steep slope in the Wudongde dam area

doi: 10.12090/j.issn.1006-6616.2020.26.04.048

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Geohazard monitoring and risk management of high-steep slope in the Wudongde dam area

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