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为研究渗透水压对节理应力-渗流耦合特性的影响,通过对6组人造节理试件恒定法向载荷和恒定法向刚度的压剪渗流试验,分析了应力和位移、节理水力开度以及透过率随剪切位移的变化趋势,获得了渗透水压对节理岩石应力-渗流耦合特性的影响规律。结果表明:节理试件的剪切应力和位移、水力开度以及透过率都与渗透水压密切相关。剪切应力随渗透水压的增大而减小,法向变形、水力开度和透过率却随渗透水压的增大而增大。在压剪渗流试验过程中,不同渗透压力的节理试件都发生了剪胀效应。研究可为深部岩体工程围岩遇水作用稳定性及渗流灾害控制技术提供科学的理论依据。
In order to study the influence of seepage hydraulic pressure on the joint stress-seepage coupling characteristics, this paper analyzed the effects of stress and displacement, joint hydraulic opening, and hydraulic pressure on the 6 groups of artificial joints under constant pressure and constant normal load. The influence of seepage hydraulic pressure on the stress-seepage coupling characteristics of jointed rock is obtained. The results show that the shear stress and displacement, the hydraulic opening and the permeability of the joints are closely related to the infiltration pressure. The shear stress decreases with the increase of the infiltration pressure, and the normal deformation, hydraulic opening and permeability increase with the increase of the infiltration pressure. In the process of pressure-shear seepage test, the dilatancy effect occurred in the joint specimens with different osmotic pressure. The research can provide a scientific theoretical basis for the stability of the surrounding rock in deep rock mass engineering and the control technology of seepage disaster.