摘要
中间带宽度变化时,设置的过渡段的渐变率对行车安全有重大影响,论文通过分析中间带宽度过渡段内车辆的轨迹特点,采用对比分析的方法选取了符合过渡段车辆运行轨迹特征的缓和曲线轨迹模型,并据此推导出了符合车辆运行状态的中间带宽度过渡段渐变率的计算模型,分析提出了不同渐变宽度、设计速度和超高横坡下中间带宽度过渡段的极限最大渐变率和一般最大渐变率,并提出了渐变率不仅与设计速度和超高横坡有关,而且与渐变宽度也有关系的结论。
When the width of the intermediate belt changes,the ramp rate of the transition section has a significant influence on the traffic safety,by analyzing the characteristics of the vehicle of the transition section in intermediate belt,this paper adopts comparative analysis method to choose easement curve trajectory model which is conform to the vehicle trajectory characteristics in the transition section,according to this,calculation model of the ramp rate of the intermediate belt transition section which is In line with the vehicle running state is deduced,analyzes and raises a proposition of the ultimate largest gradual change ratio and the general largest gradual change ratio under different grade width,design speed and super elevation transition zone. In addition,this paper puts forward the conclusion that the ramp rate is related to not only design speed and super elevation transition zone,but also the grade width.
出处
《公路工程》
北大核心
2016年第1期94-97,107,共5页
Highway Engineering
关键词
公路工程
中间带
宽度过渡
行车轨迹模型
过渡段长度
渐变率
highway engineering
intermediate belt
width transition
vehicle trajectory model
transition segment length
ramp rate
