PROBABILISTIC APPROACH FOR DEFINING ROCK MASS PROPERTIES IN STRESS – STRAIN ANALYSIS IN TUNNELING

Abstract

Predicting the mechanical behavior of rock masses due to their complex properties and conditions is an extremely complex task. So, when defining their physical-mechanical properties a comprehensive approach is required, using the appropriate scientific methods. The principle of the method “interaction of rock and tunnel lining support”, widely used for designing tunnel constructions is presented in this paper. The reaction curve of the rock which shows the connection between the pressure of the tunnel lining support and the tunnel convergence, as the tunnel deformation versus the strength ratio of the rock mass and the local exerting is being considered. These analyses for the reaction curves of the tunnel lining support and the rock are made for a tunnel in Macedonia, using the software package ROCSUPPORT.