Abstract：Seismic loads lead to internal stress state changes in rock slopes, which causes several failure modes such as disintegration, mass ejection, et al. The stress change in the slope is studied by analyzing the stress state changes of an internal element and structural planes in rock slopes subjected to both static and seismic loads. Based on the criteria of the tensile strength and Mohr-Coulomb strength, the failure of the intact rocks and rocks with structural planes were described. Applying the theory of earthquake dynamics, the failure mechanisms of tension failure of slope-shoulder and the shear failure of slope-toe are proposed, and the slip reactivation conditions and the dynamic slip process of the slopes with weak structural planes are discussed. The additional stresses induced by seismic loads alternates in either positive or negative directions, the axis of main plane rotates dynamically, different parts of rockslopes experience tensile and compressive stress states accordingly, the rock mass ruptures in a layering form, the seismic load expands the range of weak structural plane inclinations which may cause landslides. A case study shows that the method of stress state analysis can be applicable to the description of slope destruction process, therefore can be considered a new approach to the analysis and prevention of the failure of rock slopes subject to earthquakes.
王来贵, 习彦会, 刘向峰, 赵国超. 地震载荷作用下岩质边坡应力状态调整与破坏规律分析[J]. 土木工程学报, 2015, 48(12): 109-115.
Wang Laigui, Xi Yanhui, Liu Xiangfeng, Zhao Guochao. Analysis on stress state adjustment and collapse of rock slope subject to seismic loads. 土木工程学报, 2015, 48(12): 109-115.
