A sensitivity study on influencing factors of reservoir landslide-causing incentives in three Gorges Reservoir Region-based on grey relation method

作者：Xie Liangfu; Yan Echuan; Long Lihong; Cheng Jiangtao

来源：Electronic Journal of Geotechnical Engineering, 2015, 20(26): 12855-12871.

• Different types of reservoirs
• Engineering geological model
• Grey relation
• Permeability characteristics
• Reservoir landslide
• Reservoir water level drawdown
• Sensitivity
• Three Gorges Reservoir region

According to dynamic incentives of landslide formation, reservoir landslide can be divided into three types: rainfall-induced landslide, reservoir water level rise induced landslide and reservoir water level drawdown induced landslide, and its formation incentives are mainly controlled by its static background factors. In order to analyze the engineering geological model of different types of reservoirs prone to landslide and to conclude the sensitivity of influencing factors of reservoir landslide-causing incentives, this paper takes one hundred reservoir landslides in the area of Fengdu to Badong in Three Gorges Reservoir Region as statistical objects for analytical study. It, first, establishes the system of reservoir landslide static background factors, then generalizes the engineering geological model of different types of reservoirs which are prone to landslide based on the statistics of investigation information on one hundred reservoir landslides from the area of Fengdu to Badong in Three Gorges Reservoir Region, and finally analyzes the sensitivity of influencing factors on reservoir landslide-causing incentives. The research shows that: (1) three types of reservoirs prone to landslide have distinctive differences in engineering geological model, which are mainly presented in the aspects of landform and slip band features;(2) the correlation descending order between each static background factor and dynamic disaster-causing incentives is as follows: strata dip >friction of joints of slip band soil >topographic slope >cohesion of joints of slip band soil >coefficient of submergence >slope height >thickness of slide mass >slope shape >type of bank-slope >permeability characteristics >formation lithology;(3) looking from the affiliation of each static background factor, it is quite evident that reservoir landslide incentives are mostly influenced by slip band, and are least by slip bed.

• 出版日期2015