DENG Qin, TANG Hua, WANG Dong-ying, et al. Bench-shape slope stability analysis based on strain softening model[J]. 2018, 39(11): 4109-4116.DOI: 10.16285/j.rsm.2017.0295.
the potential slip surface of each step and other slip surfaces which do not meet the specification requirements of bench-shape slope also need to be considered. Based on strain softening theory
the development of shear strain in bench-shape slope is simulated by FLAC3D
and the multi-slip surfaces have been obtained. Meanwhile
the strength parameters and evolution of safety factor of slip surface in strain softening process have been analyzed by using vector sum method. Examples of double-step slope and complex multi-step slope show that: the critical and secondary slip surfaces can be obtained; the strength parameters in the slip surfaces gradually change from peak strength to residual strength as the strain softening progresses. However
the speed is different. With the development of strain softening process
the safety factor of all slip surfaces reduces gradually