Safety Evaluation and Countermeasures of Xulingguan Tunnel Section of Na-Qian Expressway

To evaluate the safety of Xulingguan tunnel section of Nan-Qian expressway, the road condition and traffic condition were collected and analyzed, respectively. The safety appraisal from the running speed coordination to the line shape consistency of the tunnel entrance were evaluated, and the corresponding safety control countermeasures were put forward, which provide theoretical and technical guidance for the design and operation safety of Na-Qian expressway tunnel. It provides a good reference for dealing with the safety problem of other highway tunnel section in China.