快速路圆曲线超高与横向力系数分配方法研究

Study on Distribution Method of Super Elevation and Cornering Ratio of Expressway Circular Curve

在道路平曲线设计中,超高与横向力共同作用抵消车辆在曲线行驶中产生的离心力,保证行车安全和舒适。通过分析国内现行城市道路与公路路线设计规范在超高设计方面的相关要求,借鉴美国AASHTO超高分配计算方法,以城市快速路为例,提出了不同圆曲线半径建议超高值,以弥补过往凭工程经验进行超高计算的不足。

In the horizontal curve design of road,the super elevation and lateral force act together to offset the centrifugal force generated by the vehicles in curve driving,which guarantees the safety and comfort of driving.By analyzing the relevant requirements of super elevation design in the current route design specifications of urban road and highway in China,referring the super elevation distribution calculation method of AASHTO,taking an urban expressway as an example,the super elevation values for the different radius of circular curves are proposed in order to remedy the insufficient super elevation calculation based on the past engineering experience.