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

摘要： 针对节理裂隙岩质边坡渗流稳定性问题，建立了含两组节理裂隙岩质边坡物理模型和力学模型，通过极限平衡理论，提出了含两组节理裂隙岩质边坡稳定性计算方法。基于单一裂隙在应力条件下的渗流定律，将裂隙面上的正应力和剪应力等效为最大主应力和最小主应力，得出单一裂隙的渗流速度和渗流驱动力，进而提出含两组节理裂隙岩质边坡渗流稳定性计算方法。万州首立山5个含两组裂隙高陡岩质稳定性计算结果表明：受渗流驱动力的影响，边坡W123和W132由基本稳定边坡变为欠稳定状态；渗流稳定系数和无渗流稳定系数相比，降低了1.5%~5.7%；对于充填裂隙、非贯通裂隙以及开度较小的裂隙可不考虑裂隙渗流驱动力，但对于贯通性较好、裂隙开度较大的岩质边坡，渗流驱动作用不容忽视。

关键词: 岩土工程, 渗流驱动力, 稳定性计算方法, 岩质边坡