Analytic methods for recognizing the viscoelastic mechanical model of surrounding rocks at non-round tunnels

摘要

In this paper the linear relationship between the radial displacement of the viscoelastic surrounding rocks at non-round tunnels and the creep compliance of the rock mass is discussed. The creep compliance is determined by means of the back-analysis. Furthermore, according to the value of the creep compliance, the mechanical model of rock mass is to be built, and its mechanical parameters are back-analyzed by means of analytic methods.