The Research Of The Unified Strength Theory On Mechanical Properties In The Underground Engineering

The strength of rock mass is the basis.contents carried out by rock mechanics, how to choose an appropriate strength theory is not only related to the safety of rock mechaincs but also great economic significance. In this paper, unified strength theory, using theoretical analysis method combined with the actual project site measured data and numerical analysis to a complete rock, jointed rock masses and loose rock classic rock three targeted focus on the measured displacement of the tunnel and perinatal rock stress with the theoretical values fit.The main thesis is divided into about 5 parts:1. Summarized and discussed the advantages and disadvantages of the current rock mass strength, based on the above theory does not take strength between rock mass effect problem, leads to the unified strength theory.2. Analysis of rock mass quality classification standards and advanced a fit in the unified strength theory of rock mass quality classification method3. Recalling the unified strength theory of the development process and application in tunnel engineering.4.Useing the unified strength theory into a complete rock, jointed rock masses and loose rock, derived from a series of new mechanical properties, Finally, the feasibility of algorithm was verified by a real instance in engineering field.5. Combined with a complete rock engineering practice, the use of numerical analysis simulation of a complete displacement of rock and rock stress, and with the theoretical value, the measured data and numerical analysis of three compared to verify the unified strength theory in the tunnel engineering applicability .