Effect of the Water-Rock Interaction on the Creep Mechanical Properties of the Sandstone Rock

  • Zuosen Luo
  • Jianlin Li
  • Qiao Jiang
  • Yinchai Zhang
  • Yisheng Huang
  • Eleyas Assefa
  • Huafeng Deng

Abstract

After the commencement of the Three Gorges hydropower project, the reservoir water level has been fluctuating by 30 m (145–175 m) annually. The stability of the bank slope has been highlighted since the reservoir water level has been repeated. Apart from that, the long-term effect of the water-rock interaction on the rheological and mechanical properties of the rock was not studied sufficiently. Therefore, a typical sandstone rock was brought from the Three Gorges reservoir area, to meet the purpose of this study. Then, a series of water-rock interaction tests were conducted to simulate the fluctuations in the reservoir water level. Based upon the experimental results, the following points were pointed out: 1) for the first three successive water-rock interaction cycles, the long-term strength of the rock was dramatically reduced. In contrast, the rate of reduction on the long-term strength of the rock was getting a steady state after six successive water rock interactions.2) At the failure stress level, the rock specimens exhibited similar characteristics under different water-rock interaction cycles. 3) The densely compacted micro structures of the sandstone rock were transformed into loose and porous state.

Keywords: reservoir bank slope, creep, water-rock interaction, sandstone, deterioration mechanism
Published online
2018-01-05
How to Cite
Luo, Z., Li, J., Jiang, Q., Zhang, Y., Huang, Y., Assefa, E., & Deng, H. (2018). Effect of the Water-Rock Interaction on the Creep Mechanical Properties of the Sandstone Rock. Periodica Polytechnica Civil Engineering, 62(2), 451-461. https://doi.org/10.3311/PPci.11788
Section
Research Article