Analysis of stability and reliability of bedding rock slope by stochastic finite element method

作者：Gao Rong Xiong^*; Gong Wen Hui; Wang Yuan Han; Wang Hua Bin

来源：Yantu Lixue/rock and Soil Mechanics, 2009, 30(4): 1165-1169.

• Analysis of stabilities
• Basic principles
• Bedding rock cutting slope
• Bedding rock slopes
• Discrete methods
• Evaluation indexes
• Evaluation results
• Failure characteristics
• Mean values
• Mohr-Coulomb criterion
• Perturbation method
• Second orders
• Second-order statistics
• Stochastic finite element method
• Stochastic variables

The basic principles of the perturbation stochastic finite element method (PSFEM) are introduced. By using the second order PSFEM where the mean value is taking as the center and the local-average space discrete method, the second order statistic mean value, covariance and deviation are analyzed. Considering the failure characteristics of the bedding rock cutting slope slipping along the soft intercalation and based on Mohr-Coulomb criterion, the formulae of the safety factor and reliability of the slope stability have been obtained. Taking a typical engineering example of the bedding rock cutting slope, the slope stability and reliability of the slope are calculated by PSFEM. The results show that PSFEM presented can be used to consider the influence of the multiple stochastic variables. The safety factor and reliability can be taken as the evaluation indexes of the slope stability at the same time. By this way, the evaluation results may be more accurate and overall.

• 出版日期2009