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对隧道洞口“线形应一致”的不同理解,将在隧道洞口线形布设时产生重大影响。结合清连一级公路既有隧道洞口线形布设情况,通过交通事故调查、洞口线形安全性分析,提出正确理解“线形应一致”的看法。同时,对山区高速公路隧道洞口线形设计提出建议,作为清连项目设计的重要依据,也可供其他新建工程或改扩建工程建设项目设计时参考。
The different understanding of the tunnel entrance “line should be consistent,” will have a significant impact on the layout of the tunnel openings. Combined with the layout of the existing tunnel openings in the Qinglian Class I highway, a correct understanding of the “alignment should be consistent” should be put forward through investigation of traffic accidents and analysis of the safety of the openings. At the same time, suggestions for the linear design of tunnel entrances in mountainous expressways are provided as an important basis for the design of Qinglian Project. They are also available for reference in the design of other new construction or renovation and expansion projects.