Effect of hydraulic distribution on the stability of a plane slide rock slope under the nonlinear Barton-Bandis failure criterion
Lian-Heng Zhao,Jingyuan Cao,Yingbin Zhang,Qiang Luo
Abstract
In this paper, stabilities of a plane slide rock slope under different hydraulic distributions were studied based on the nonlinear Barton-Bandis (B-B) failure criterion. The influence of various parameters on the stability of rock slopes was analyzed. Parametric analysis indicated that studying the factor of safety (FS) of planar slide rock slopes using the B-B failure criterion is both simple and effective and that the effects of the basic friction angle of the joint (φb), the joint roughness coefficient (JRC), and the joint compressive strength (JCS) on the FS of a planar slide rock slope are significant. Qualitatively, the influence of the JCS on the FS of a slope is small, whereas the influences of the φb and the JRC are significant. The FS of the rock slope decreases as the water in a tension crack becomes deeper. This trend is more significant when the flow outlet is blocked, a situation that is particularly prevalent in regions with permafrost or seasonal frozen soil. Finally, the work is extended to study the reliability of the slope against plane failure according to the uncertainty from physical and mechanics parameters.
Key Words
rock slope stability analysis; plane failure; nonlinear Barton-Bandis failure criterion; hydraulic action; factor of safety
Address
(1) Lian-Heng Zhao, Jingyuan Cao — School of Civil Engineering, Central South University, Changsha 410075, China
(2) Yingbin Zhang — Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu, 610031, China
(3) Yingbin Zhang — Department of Geotechnical Engineering, School of Civil Engineering, Southwest Jiaotong University, Chengdu 611756, China
(4) Qiang Luo — Department of Communications of Guizhou Province, Guizhou Guiyang 550003, China.
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