高速公路避险车道平面参数可靠性设计  

Reliability Design of Plane Parameters of Highway Escape Ramps

作　　者：张航[1] 刘洋[1] ZHANG Hang;LIU Yang(School of Transportation and Logistics Engineering,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]武汉理工大学交通与物流工程学院,武汉430063

出　　处：《武汉理工大学学报（交通科学与工程版）》2023年第2期203-208,共6页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：国家自然科学基金(51678460)。

摘　　要：文中引入可靠度理论,根据几何约束分别确定避险车道驶入角和引道长度计算模型,基于不同模型构建驶入角和引道长度的可靠度功能函数,对驶入速度、车辆主线行车轨迹半径、驾驶员反应时间等相关参数进行统计并分析其分布规律,分别采用验算点法和蒙特卡罗法计算设计速度为120,100,80 km/h的避险车道驶入角和引道长度的可靠概率.以可靠概率大于95%为要求,对避险车道驶入角和引道长度进行可靠性设计,并给出不同主线设计速度对应的驶入角和引道长度的推荐值.结果表明:当设计的避险车道驶入角和引道长度值的可靠概率大于95%时,避险车道具有良好的安全性.对于设计速度分别为120,100,80 km/h的高速公路避险车道,在最不利情况下,计算得到满足可靠概率大于95%的驶入角推荐值分别为4°、4.2°、4.4°,引道长度推荐值分别为65,64,63 m.Based on the reliability theory,the calculation models of the entry angle and approach length of the refuge lane were determined respectively according to the geometric constraints.Based on different models,the reliability function functions of entry angle and approach length were constructed,and the relevant parameters such as entry speed,trajectory radius of vehicle main line and driver’s reaction time were counted and analyzed.The reliability probability of the entry angle and approach length of the refuge lane with the design speed of 120,100 and 80km/h was calculated by checking point method and Monte Carlo method respectively.With the requirement that the reliability probability is greater than 95%,the entry angle and approach length of the refuge lane were designed reliably,and the recommended values of the entry angle and approach length corresponding to different main line design speeds were given.The results show that the safety lane has good safety when the reliability probability of the designed entry angle and approach length is greater than 95%.For the expressway escape lanes with design speeds of 120 km/h,100 km/h and 80km/h respectively,in the most unfavorable situation,the recommended values of the driving angle and the recommended values of the approach length with a reliability probability greater than 95%are calculated to be 4°,4.2°and 4.4°respectively,and 65,64 and 63m respectively.

关 键 词：交通安全 避险车道 可靠度理论 可靠概率 驶入角 引道长度 

分 类 号：U412.3[交通运输工程—道路与铁道工程]