摘要
为研究超高速公路圆曲线加宽设计理论,于分析汽车在圆曲线上行驶受力的基础上,建立了圆曲线半径计算模型。通过计算分析,得到圆曲线半径与横向力系数、超高和设计速度之间的关系。选用小客车作为设计车辆,通过分析汽车转弯时的瞬时状态,确定车辆外轮廓尺寸参数与圆曲线设计参数之间的关系,建立了圆曲线路段加宽计算模型,对不同条件下的圆曲线路段加宽进行研究。研究结果表明:圆曲线路段的加宽值与车辆前端到后轴间距以及圆曲线半径有关;根据车道摆动加宽值经验公式,加宽值还与道路的设计速度有关。在圆曲线半径相同的情况下,圆曲线路段加宽值与设计速度成正比。在极限最小半径、一般最小半径和不设超高最小半径时,圆曲线路段加宽值取值范围分别为0.21~0.28 m、0.18~0.24 m、0.07~0.09 m。研究成果可为设计超高速公路平曲线提供参考。
To study the design theory of circular curve widening of superhighway, based on the analysis of the force of the vehicle driving on the circular curve, the calculation model of the radius of the circular curve is established. The relationship between the radius of the circular curve and the transverse force coefficient, the superelevation and the design speed is obtained by calculation and analysis. Small passenger cars are selected as the design vehicle. By analyzing the instantaneous state when the vehicle turns, the relationship between the dimensions of the vehicle and the design parameters of the circular curve is determined, and the calculation model of the circular curve widening is established. Then the widening value of the circular curve under different conditions is studied. The results show that: the widening value of circular curve section is related to the distance from front to rear axle and the radius of the circular curve. According to the experiential formula of lane swing widening value, the widening value is also related to the design speed of the road. When the radius of the circular curve is the same, the widening value of the circular curve is proportional to the design speed. When the limit minimum radius, the general minimum radius and the no ultra-high minimum radius are set, the value range of circular curve widening is 0.21~0.28 m, 0.18~0.24 m and 0.07~0.09 m respectively. The results of calculation can provide reference for the design of superhighway flat curve.
作者
何永明
冯佳
权聪
陈世升
HE Yong-ming;FENG Jia;QUAN Cong;CHEN Shi-sheng(School of Transportation,Northeast Forestry University,Harbin 150040,China;Research Institute of Superhighway in Harbin,Harbin 150040,China)
出处
《公路》
北大核心
2022年第8期44-49,共6页
Highway
基金
黑龙江省自然科学基金项目,项目编号LH2019E004。
关键词
公路工程
超高速公路
圆曲线半径
加宽模型
设计车辆
highway engineering
superhighway
radius of circular curve
widening model
design vehicle