Deformation response and anchorage control of excavation unloading of high and steep rock slope

Abstract

The stability and anchorage control of high and steep slopes in Southwest China are challenging problems in engineering construction. Considering the unloading stability of high and steep rock slopes, field monitoring and numerical analysis methods are used for feedback analysis to study the deformation, stress response, anchorage support scheme, and anchorage stress characteristics during the unloading process of slope excavation. The research shows that the displacement of rock mass of the high slope gradually increases and the local deformation exceeds 200 mm. The unloading relaxation area resulting from slope excavation is 25 m deep. The safety of the slope can be guaranteed after the joint reinforcement of deep anchor cable.