DEFORMATION MECHANISM OF JIEFANGGOU HIGH STEEP DIPSLOPE IN JINPING HYDROPOWER STATION

The paper discussed the deformation mechanism of one high steep dipslope in Jinping hydropower station. Through field investigation, experimental analysis and numerical simulation, the authors have a more profound insight into the problem. The previous conclusions were discussed in the paper. There is evidence that problems exist in earlier analysis. As a result, a new insight was gained. The results indicate that the deformation of deep rock layer at Jiefanggou left bank high slope is caused by a combination of deep unloading relaxation at slope in the course of cutting valley in high terra stress area and bending-toppling of deep rock layer at high dipslope.