Abstract: The structural health diagnosis of the Shilibei Tunnel was carried out by using the comprehensive fuzzy evaluation method. On the basis of statistical analysis on the structural defect detection results of the Shilibei Tunnel, a comprehensive weighting method that combining the product scaling method and the entropy weight method is used to calculate the weight of the defect indices, the number of defects and the weight obtained by the product scaling method are multiplied. The related methods have achieved good results in the engineering applications and have the value and prospects of popularization and application. The final comprehensive fuzzy evaluation result shows that the evaluation grade of the tunnel is 2A, which basically reflects the current situation of the tunnel, indicating that the relevant evaluation method has good engineering adaptability.

Key words: shilibei tunnel, structural defects, defect indies, health status, comprehensive fuzzy evaluation