Abstract: To study the stability of grouting waterproof wall system, a test was made on the permeability of grouting wall by the MTS815.02 electro-hydraulic servo controlled rock mechanics testing system, and the permeability characteristics of grouting wall system in the whole process of compression fracture were identified.The result shows that the permeability coefficient will increase gradually with the pressure increase and drastically after the strain gets to a critical value, when the fissure will occur.Moreover, the fissures and grouting concretion have an evident effect on the permeability coefficient.

Key words: Grouting curtain body, High confining pressure, Permeability characteristics