关键词: 岩土工程, 渗流驱动力, 稳定性计算方法, 岩质边坡

Abstract: For the seepage stability problem of rock slope with joints, the physical model and mechanical model for the rock slope with two sets of joints were established, and its stability calculation method was proposed by limit equilibrium theory. Based on the seepage law of single joint under stress condition, the normal stress and shear stress of fissure surface were equivalent to the maximum principle stress and the minimum principle stress; the seepage velocity and seepage driving force of single joint was obtained, and then the seepage stability calculation method for rock slope with two sets of joints was proposed. The stability calculation results of 5 high and steep rock slope with two sets of joints in Shouli Mountain, Wanzhou District show that: under the influence of seepage driving force, slope W123 and W132 vary from basically stable state to unstable state; the seepage stability coefficient reduces by 1.5%~5.7%, compared with non-seepage stability coefficient. For rock slopes with filling fissure, no cut-through fissure and fissure with lesser opening, the seepage driving force may not be considered; but for the rock slopes with better connectivity and fissure with larger opening, the seepage driving force should not be neglected.

Key words: geotechnical engineering, seepage driving force, stability calculation method, rock slope