针对软弱围岩隧道的施工，如何准确的进行围岩分级，对隧道的设计和安全施工意义重大。从国内外的应用来看，各种方法因为具有各自的适用性，很难保证结果的客观性与准确性。通过引入模糊数学方法，结合十漫高速公路软岩隧道的围岩特点，应用RMR分级系统的评分标准对岩石样品进行评分，进而建立围岩模糊信息分级模型，对围岩评分结果进行进一步的分析运算，从而使结果更具客观性。通过龚家垭隧道围岩样品实例验证，该法所得的结果与实际情况相差不大，具有较高的可信度。

 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.