Abstract:

 During the construction of softrock tunnels, how to exactly classify the rock mass is very important to the design and construction of the tunnels. From the application of the rock mass classification methods in China and abroad, it can be seen that all classification methods have their own applicability and can not ensure the objectivity and accuracy of the classification results. By introducing the fuzzy mathematics theory and combining the characteristics of the surrounding rock mass of the soft rock tunnels on ShiMan highway, the authors use the scoring system of RMR to score the rock samples, build the fuzzy information model for the classification of the surrounding rock mass and make further analysis on the scoring result, which makes the classification result more impersonal. It is confirmed by the cases made in Gongjiaya tunnel that the classification result obtained by this method is close to the fact and has high reliability.