Modelling the flexural buckling failure of stratified rock slopes based on the multilayer beam model Modelling the flexural buckling failure of stratified rock slopes based on the multilayer beam model

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Vol16 No.5: 1170-1183

Title】Modelling the flexural buckling failure of stratified rock slopes based on the multilayer beam model

Author】ZHANG Yan-jun1; NIAN Ting-kai1*; GUO Xing-sen1; CHEN Guang-qi2; ZHENG Lu3

Addresses】1 State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China; 2 Department of Civil and Structural Engineering, Faculty of Engineering, Kyushu University, Fukuoka, 812-8581, Japan; 3 College of Civil Engineering, Fuzhou University, Fuzhou 350108, China

Corresponding author】NIAN Ting-kai

Citation】Zhang YJ, Nian TK, Guo XS, et al. (2019) Modelling the flexural buckling failure of stratified rock slopes based on the multilayer beam model. Journal of Mountain Science 16(5). https://doi.org/10.1007/s11629-018-5007-1

DOI】https://doi.org/10.1007/s11629-018-5007-1

Abstract】The buckling failure of stratified rock slopes intersected by a set of steep discontinuities that are approximately parallel to the slope surface is frequently encountered while constructing railways and roadways in mountainous areas. In this study, an analytical approach based on the energy equilibrium principle is presented to solve the flexural buckling stability of stratified rock slopes within the framework of multilayer beam theory. The generalized Hoek-Brown failure criterion is introduced to reflect the influences of slope size (scale effects) on the buckling stability. Subsequently, numerical and physical modellings from previous literatures are employed to validate the proposed approach. Furthermore, a practical case of Bawang Mountain landslide is also used for the comparative analysis. The study shows that the present analytical approach is capable to provide a more reasonable assessment for the buckling failure of stratified rock slopes, compared with several existing analytical approaches. Finally, a detailed parametric study is implemented, and the results indicate that the effects of rock strength, rock deformation modulus, geological strength index, layer thickness and disturbance degree of rock mass on the buckling failure of stratified rock slopes are more significant than that of rock type and slope angle.

Keywords】Slope stability; Stratified rock; Buckling; Scale effect; Bawang Mountain