Analysis of stability of rock bedded slope under hydraulic pressure

作者：Hu Qi Zhi^*; Zhou Hui; Xiao Ben Lin; Xiao Heng Lin

来源：Yantu Lixue/rock and Soil Mechanics, 2010, 31(11): 3594-3598.

• Analysis of stability
• Critical height
• Dominant joint plane
• Drag forces
• Groundwater water
• Hydraulic pressure
• Hydrostatic tension
• Rock bedded slope
• Rock slope
• Sliding surface
• Structural planes
• Water filling
• Water pressures

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.

• 出版日期2010
• 单位岩土力学与工程国家重点实验室