CREEP ANALYSIS OF ROCK SURROUNDING ROUND TUNNEL BY CONSIDERING PORE PRESSURE

In this paper, based on the reological theory ofrock, and the principle of seepage,considering the effect of the pore pressure and porosity on deformation of rock, analytical solutions are obtained by using thethe Laplace transform (corresponding principle). In certain conditions, the creep curve under pore pressure is obtained by using the principle of effective stress (the equation of effective stress ofTerzaghi) and H-K model as the constitutive equation. Comparing this curve withthat without pore pressure, we can see that our resultsagree better with the actual situation.