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通过直剪模型试验,研究节理形貌对非贯通节理岩体的抗剪强度、变形和贯通模式的影响。在相同法向应力下,节理起伏度越大,非贯通节理岩体的抗剪强度越大。在相同法向应力下,非贯通节理岩体的法向变形越大,但是,节理起伏度越大,峰值剪切位移越小。在较高法向应力下,节理起伏度对贯通模式影响较大,节理起伏度大的非贯通节理岩体的贯通模式为剪切模式TTS,节理起伏度小的贯通节理岩体的贯通模式为张拉模式TTT。在低法向应力下,起伏度对贯通破坏模式影响小,非贯通节理岩体贯通模式都为张拉模式TTT。
Through the direct shear model test, the effect of joint morphology on the shear strength, deformation and penetration modes of non-through jointed rock mass is studied. Under the same normal stress, the greater the joint undulation, the greater the shear strength of the non-through-jointed rock mass. Under the same normal stress, the normal deformation of the non-through-jointed rock mass is larger, but the greater the joint roughness is, the smaller the peak shear displacement is. Under the higher normal stress, the undulation of joint has a greater influence on the through-going mode. The through-going mode of the non-through-jointed rock mass with large joint undulation is the shear mode TTS. The through-going mode of the through-jointed rock mass with small joint undulation is Tension mode TTT. Under the low normal stress, the undulation has a small effect on the failure modes of through-going failure, and the non-through-jointed rock mass penetration modes are all in the tension mode TTT.