Abstract
In this article, some representative analysis methods for a jointed rock mass are employed as the method that can accurately reproduce the mechanical behavior of the jointed rock mass. The excavation of the Shiobara power station cavern constructed by the Tokyo Electric Power Company is analyzed by them, and results, such as a relative displacement at cavern wall as a function of time and a displacement distribution of rock mass, are compared with measurement data. Based on the numerical results, the constitutive low of each method is considered by paying attention to the mechanical behavior of the jointed rock mass obtained from each analysis, and the mechanism which gives rise to the distinctive behavior of the rock mass is discussed. Furthermore, a point common to all and a point of difference are clarified by the results, and their distinctive features and different points in terms of the mechanical behavior of the jointed rock mass during the excavation of large-scale cavern are disputed.
