Stability and Sensitivity Analysis of Rock Landslides Based on Reliability Theory—Taking the Landslide Along the Penduo Water Conservancy Hub in Tibet as an Example
Stability and Sensitivity Analysis of Rock Landslides Based on Reliability Theory—Taking the Landslide Along the Penduo Water Conservancy Hub in Tibet as an Example
[Purposes]This papers aims to study the main instability mechanisms of rock landslides in high-altitude areas of Tibet.[Methods]Based on the reliability theory in the mathematical equation,ac-cording to the limit characteristics of the circular sliding stability of the rock landslide,and combined with a large number of field tests and mathematical probability statistics,the reliability determination limit state equation is established.[Findings]The research results indicate there is a certain influence law between the variability coefficient as well as reliability indicators and mean value of physical and me-chanical parameters such as slope α,slope height H,gravity per unit length of sliding mass W,rock cohe-sion C,and internal friction angle φ in the formula have certain influence rules.Based on this,a reliabil-ity analysis and calculation model for rock landslides was established.[Conclusions]By calculating the re-liability sensitivity of various physical and mechanical parameters,it can be concluded that the inclination angle sensitivity of rock landslides is the highest,followed by the unit length weight,internal friction angle,and cohesion index of landslides;there is no obvious impact pattern on the height of the landslide slope.
关键词
西藏地区/岩质滑坡/可靠度指标/概率统计/敏感性
Key words
Tibet region/rock landslide/reliability indicators/probability statistics/sensitivity
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