Study on deformation of Mu-Zhu-Ping slope due to the rise of Reservoir water level

Mu-Zhu-Ping slope, located on the right bank of the estuary of the primary tributary Mo-Dao River on the left bank of Qing-Jiang Shui-Bu-Ya Reservoir region in Hubei province, China, is mainly composed of loose deposit of Quaternary system. On May 10th in 2007, when Shui-Bu-Ya Reservoir water level rose to 289m, the front part of the slope was collapsed locally, so it is significant to study on the stability of Mu-Zhu-Ping slope. At first, three-dimensional geology generalization model was established according to the topographic and geologic conditions of Mu-Zhu-Ping slope. And then, based on coupled fluid-solid theory, the Fluid-Solid Coupling calculation was made on different water levels by the ABAQUS finite element software. According to the calculation, the results show that displacement in the front of slope was larger along with reservoir water level rise. When water level reached to 289m, the phenomenon of deformation and slumping was occurred locally in the front of slope. When water level is 360m, it was that deformation zone was formed in the front of slope while the stability at the central and upper part was better. When water level reached to 400 m, the instability would be happened in the front part of the slope locally because two larger deformation area was generated in the front of slope, and plastic path at the bottom of the slope was cutting thought thus the global stability of the slope was poor. The achieved results can provide a foundation for the further analysis of the stability of Mu-Zhu-Ping slope.