山区高速公路隧道群路段安全评价

为提高山区高速公路隧道群路段的行车安全性,通过对隧道群路段特征断面车辆速率及驾驶员心理、生理指标变化特征的分析建立了隧道群路段结构物长度和几何线形指标对车辆速率差以及驾驶员心率增长率的影响关系模型.结果表明,对于由2座隧道组成的隧道群,隧道连接段小型车的最大速率差受前一隧道和连接段的长度影响较大,大型车的最大速率差受连接段的长度以及纵坡影响较大;在第1座隧道的出口,驾驶员心率增长率受前一隧道和连接段长度的影响较大,而在第2座隧道的进口,驾驶员心率增长率受连接段长度以及隧道进口平纵线形综合指标的影响较大.在对关系模型进行验证分析的基础上,结合国内外相关研究成果,提出了基于速率差和心率增长率的隧道群路段安全评价方法.

Safety Evaluation of Tunnel Group on Freeways in Mountainous

In order to improve the driving safety in freeway tunnel groups in mountainous areas, the effects of structure length and geometric alignment of tunnel groups on vehicle speeds and heart rate increments of drivers are quantified with the analyses of the vehicle speed changes at specific sections and psychology and physiology indices for drivers on tunnel group segments. For a tunnel group composed of two tunnels, the research results show that the effect of the lengths of the previous tunnel and the tunnel linkage section on maximum speed difference of small vehicles at tunnel linkage section is relatively obvious, and the effects of length and grade of tunnel linkage section on maximum speed difference of large vehicles at tunnel linkage section is relatively large; heart rate increment of drivers at the exit of the first tunnel is largely affected by the length of previous tunnel and tunnel linkage section, and heart rate increment at the entrance of the second tunnel is largely affected by the length of tunnel linkage section and the combined influence of horizontal and vertical alignment of tunnel entrance. On the basis of the validation of prediction models, safety evaluation methods based on the speed difference and heart rate increments are provided.