Excavation response of soft rock high slope considering strain softening feature

In order to reflect the characteristics of geotechnical engineering materials more really, taked a project of highway soft rock slope excavation as the background, and established the corresponding strain softening model, and carryed out the numerical calculation on the change of the deformation and the plastic zone distribution and safety coefficient during the process of slope excavation. The results showed that: the strain softening model which was established by FLAC3D can be better reflect the strain softening properties of soft rock slope; The vertical and horizontal displacement presented the tendency of increase gradually and the vertical displacement of feature points were overall greater than the horizontal displacement during the process of soft rock slope excavation;The distribution of slope shear and tension plastic zone mainly focused on the slope surface layer 2 m 4 m range; The slope safety factor was reduced during the process of excavation.