Reinforcement mechanism of slopes with yielding anchor cables based on numerical simulation of FLAC^3D

The unloading deformation and range of the excavation slope are larger in high-ground stress or soft rock areas, and the ordinary bolt (cable) cannot meet the need of such deformation. So, exploring the new support measures has become an inevitable trend. A constitutive model to simulate the working principles of yielding anchor is put forward, and the numerical simulation method for the reinforcement of the yielding anchors are successfully realized. Taking the reinforcement design of the slope at the left bank of Jingping I Hydropower Station as a typical example, the effectiveness and influence of slope reinforcement in the excavation and unloading process are simulated and analyzed. The results show that the yielding anchor has certain advantages in the large deformation of the slope, and the numerical simulation method may provide a scientific basis for the design of the yielding anchor supporting scheme.