Mechanical analysis for progressive failure of debris landslide
(0) It is significant to research failure mechanism of debris landslides that are widespread in the Three Gorges Reservoir. Based on the statistical analysis of development law and failure mode of debris landslides in the Three Gorges Reservoir, the mode of progressive failure is found. The mechanical model for progressive failure of debris landslides with two slip bands is also established by applying slice method. Ac- cording to the results of the downslide force between adjacent slices, if the downslide force of lower slice is larger than zero, the slice fails along the major sliding surface, otherwise it is stable. In result, the failure range is obtained. The stress function can be determined through dimensional analysis of failure slice. According to static boundary conditions of the slice, stress state of any point in the slice can be obtained. Then stress state of any point in the secondary slip band can also be established. The failure of the secondary slip band is judged on the basis of Mohr-Coulomb failure criterion. Therefore, the mechanical method is proposed to analyze progressive failure of debris landslide with two slip bands.
Haibo MIAO Kunlong YIN Deying LI
Faculty of Engineering,China University of Geosciences,Wuhan,430074,China
国际会议
International Symposium and The 7th Asian Regional Conference of IAEG(国际工程地质与环境协会年会暨第七届亚洲工程地质会议)
成都
英文
1009-1015
2009-09-09（万方平台首次上网日期，不代表论文的发表时间）