基于运行速度特征的公路平曲线设计半径推荐取值研究

Study of Recommended Value of Horizontal Curve Design Radius Based on Operating Speed Characteristics

基于多个研究课题在运行速度理论和模型方面的研究成果,通过分析不同类型公路运行速度预测模型,揭示出不同类型、设计速度公路的运行速度特点和规律及其与平曲线半径之间的关系,提出与路段运行速度对应的各级公路平曲线半径设计推荐取值范围。结果表明:所提出的关键技术指标取值为在公路路线设计与优化中实现定量化选用技术指标奠定了基础,有助于保证公路设计中关键技术指标取用的一致性和协调性。

Based on the study result of theories and models of operating speed for many project research groups,the relationship between horizontal curve radius and the characteristics and laws of operating speed for the highway of different types and design speeds could be revealed by the analysis on operating speed prediction models for different types of highways.Furthermore,authors put forward the recommended value ranges for the horizontal curve radius of all classes of highways which corresponded to the operating speed.Results show that the proposed key technical-indexes establish the basis of quantitative selection of technical-indexes for the highway alignment design and optimization,also ensure the consistency and compatibility of the selection of key technical-indexes for highway alignment design.