The low-dip fault fracture zone exi

The low-dip fault fracture zone exists in the dam foundation, which seriously affects the anti-skid stability of the deep layer, especially the formation of the controlling slip surface, which will cause serious damage to the foundation of the gravity dam, and there is a great hidden danger in the operation of the gravity dam. The effect of seepage water will affect the fault fracture zone, resulting in the generation of fine particles and the destruction of the whole structure of gravity dam, which is a typical seepage failure phenomenon. The permeability stability experiment is applied in the construction, and the failure ratio drop and critical ratio drop can be determined, thus the permeability stability evaluation can be carried out.