DefinePK

Abstract

By using the system of anti-force frame, the problem of support difficult about counteraction bearing is solved in open-air rock mass shear test. When the strength of the foundation surface rock mass is tested in High Rock Slope Engineer, the normal load is provided by anti-force frame, and the horizontal load is supported on steep part of the different rock mass. The shear-break strength parameters and the shear strength parameters of the rock mass are analyzed. The curves of shear (break) normal stress ~ shear stress, t' ~ uh (uv) and t ~ uh (uv) are obtained. The experimental results show that the friction angle of the rock mass is 31.3°, close to its natural inclination.