Abstract:

The deformation modulus is an important parameter to denote ability of anti-deformation of rock mass and is used to many projects. It is difficult to obtain deformation modulus of deep cracked rock mass by making use of conventional experimentation method or borehole elasticity modulus method. So according to a new experimentation method and corresponding formula, deformation modulus of deep cracked rock mass is obtained by using of indoor test: putting the deep cracked rock mass into MTS to test and note the displacement and stress,taking cracked rock mass in dam foundation as an example, computing and analyzing deformation modulus of deep cracked rock mass. After test and calcuation of deformation modulus of the rock mass from deep fructured zone in dam site of hydropower plants, it is proved that the difference of result of deformation modulus is less than 10% usually by using of two methods. The new experimentation method achieves good effect.

Key words: engineering geology, cracked rock mass, deformation modulus, experimentation method, Hydropower plant