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在分析我国山区高速公路连续上坡路段纵坡设计中存在的问题和载重车在上坡路段的运行速度特点的基础上,进行缓和坡段设置必要性分析。根据我国目前载重车的载重吨位分布与功率质量比的特点确定了研究的主导车型,并基于上坡路段载重车的运行速度变化特点、上坡路段载重车的受力特点,以恢复上坡路段载重车的运行速度为目的,推导出主导车型上坡缓和坡段的缓坡设计参数计算模型,并提出了不同海拔高度情况下缓坡坡度、坡长建议值及使用条件,研究成果为山区高速公路连续上坡路段合理纵坡设计提供参考。
Based on the analysis of the problems existing in the longitudinal slope design of the continuous uphill section of the mountainous expressway in our country and the characteristics of the running speed of the truck on the uphill section, the necessity of mitigating the slope section setting is analyzed. According to the current load truck tonnage distribution and power quality ratio of the characteristics of the study to determine the dominant model, and based on the uphill section of the truck speed changes in the characteristics of the uphill load capacity of the truck to restore the uphill section of the truck The calculation model of the gentle slope design parameters of the dominant slope uphill slope section is deduced and the gentle slope slope grade and the recommended value of the slope length at different altitudes are put forward.The research results are as follows: Longitudinal slope design for reference.