Abstract
In Japan, there are a lot of construction results of power -station cavern. It is, however, indispensable to develop the analysis method which is able to predict the behavior of rock mass during cavern excavation so as to make an excavation under the condition of severe geology and earth pressure. In this article, the Nonlinear Analysis Program Including Softening Model, the Micromechanics-Based Continuum Model, the Equivalent Rock-bolt Model, the Multiple Yield Model, Crack Tensor Model and Damage Tensor Model are employed to carry on the analysis of cavern excavation. First, their macroscopic equivalent shear modulus are compared under the condition that a macroscopic material includes a single discontinuity. Next, the input parameters by which the behavior of rock mass during the excavation of the Shiobara power station constructed by Tokyo Electricity Power Company is reproduced are extracted. Using them, one element problem is analyzed by those models, and their results are discussed.
