›› 2010, Vol. 31 ›› Issue (11): 3594-3598.

• Numerical Analysis • Previous Articles     Next Articles

Analysis of stability of rock bedded slope under hydraulic pressure

HU Qi-zhi1，ZHOU Hui2，XIAO Ben-lin1，XIAO Heng-lin1   

  1. 1. School of Civil Engineering and Architecture, Hubei University of Technology, Wuhan 430068, China; 2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
  • Received:2010-01-19 Online:2010-11-10 Published:2010-11-24

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Abstract:

By analyzing the effect of groundwater water on rock bedded slope, it is found that the stresses of groundwater mainly act as fissured water pressure and drag force on structural plane. And through the analysis of the dominant joint plane controlling the stability in sliding failure, this paper holds that the fissured hydrostatic tension on this plane, the pressure on sliding surface and the drag force are all decided by water filling at the back edge of the fissure. In this paper, also on the assumption that typical rock slope samples are simplified, making use of the simplified hydraulic model of slopes, two numerical expressions are presented. One is about the slope stability and the other is about the critical height of water filling in cracks which decides the slope stability. Based on the analysis and calculation of actual slopes, the proposed formula is proved to be reasonable. It is also concluded that the decrease in slope stability under the influence of groundwater is mainly related to hydrostatic pressure instead of its penetration.

Key words: hydraulic pressure, rock bedded slope, dominant joint plane, slope stability

CLC Number: 

  • TU 443
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