EGU22-2006
https://doi.org/10.5194/egusphere-egu22-2006
EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

A Hydro-Mechanical Coupling Test System for Simulating Rock Masses in High Dam Reservoir Operations 

Yuxin Ban1, Qiang Xie2, Xiang Fu3, and Aiqing Wu3
Yuxin Ban et al.
  • 1Chong University of Science and Technology, School of Civil Engineering and Architecture, Chongqing, China (banyuxin@163.com)
  • 2Chong University, School of Civil Engineering, Chongqing, China
  • 3Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources, Changjiang River Scientific Research Institute, Wuhan, China

A meter-level direct shear test system and a true triaxial test system were designed by placing the traditional test apparatus into sealed cabins subjected to high water pressure. The influences of three-dimensional seepage water pressure on the shear and compression deformation of rock mass in Xiluodu Hydropower Station were studied. The test results showed that the changes in water pressure caused obvious shear deformation of the interlayer dislocation zone and tensile deformation and reduction in the triaxial compression strength of the fractured rock mass. The effect of water pressure on shear displacement and tensile displacement had a hysteresis effect. This was consistent with deformation data collected through field monitoring. The deformation mechanism in the reservoir valley was the coupling of the stress and seepage fields caused by reservoir impoundment. The effective stress was reduced, the mechanical parameters were weakened, and the change of the initial stress field led to the slightly overall shear slip and tensile deformation of the bank slope.

How to cite: Ban, Y., Xie, Q., Fu, X., and Wu, A.: A Hydro-Mechanical Coupling Test System for Simulating Rock Masses in High Dam Reservoir Operations , EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-2006, https://doi.org/10.5194/egusphere-egu22-2006, 2022.