XU Jinhong,HUANG Bolin,NIE Bangliang,et al.Study on Risk Prevention and Control for Impulse Wave Generated by the Guanmuling Dangerous Rock Mass in the Three Gorges Reservoir Area[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(06):1395-1404.
XU Jinhong,HUANG Bolin,NIE Bangliang,et al.Study on Risk Prevention and Control for Impulse Wave Generated by the Guanmuling Dangerous Rock Mass in the Three Gorges Reservoir Area[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(06):1395-1404. DOI: 10.13409/j.cnki.jdpme.20220802003.
Study on Risk Prevention and Control for Impulse Wave Generated by the Guanmuling Dangerous Rock Mass in the Three Gorges Reservoir Area
The stability of the dangerous rock base of the Guanmuling in the Three Gorges Reservoir area continues to decline due to the severe deterioration of rock mass. Potential wave disaster induced generated by the rock mass collapse seriously threatens the safety of the Jiuwanxi drifting scenic spot and the Yangtze River waterway. This paper focuses on the risk assessment of dangerous rock wave and the prevention and control design of dangerous rock wave based on fluid-structure coupling numerical simulation. The results show that: Under the condition of the reservoir water level of 145 m in tourism peak season, the maximum possible height of wave generated by the dangerous rock mass instability in Guanmuling is about 19.2 m, with the maximum ascending height of the Jiuwanxi tourism wharf on the opposite side of 15.1 m, and the Yangtze River of 1.6 m, which seriously threatens the safety of these waterway about 15 km. In view of the dangerous rock mass under eccentric compression and the deterioration of the base rock mass in the fluctuation zone, the engineering prevention and control design of "bag concrete cofferdam + rock cavity filling" was carried out on the lower cavity of the dangerous rock mass, which increased the stability coefficient of the Guanmuling dangerous rock mass from 1.3 to 2.6. This study contributes directly to the prevention and control project of dangerous rock mass in Guanmuling, also provides reference for the risk prevention and control of wave gererated by other dangerous rock masses in the reservoir area.
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