基于典型汽车爬坡的高海拔地区公路最大纵坡

Maximal Gradient of Highway in HighAltitude Area Based on Typical Truck’s Climbing Performance

摘要:

以典型车型实地行车试验数据为基础，建立了载重汽车在不同海拔、坡度下的运行速度距离曲线.结果表明：在3 000~5 000 m海拔范围内，海拔越高，汽车在相同坡度路段的爬坡速度下降越快，达到的稳定速度也越低；高海拔地区设计速度为100、80和60 km?h-1公路的最大纵坡与现行标准中规定的相同设计速度下一般地区的公路最大纵坡相比降低了1%~2%.

关键词:公路; 高海拔; 最大纵坡; 汽车; 爬坡特性

Abstract:

Based on typical truck’s climbing performance in real driving test, the truck’s speeddistance curves on different gradients at different altitudes were built. The results show that the truck’s climbing speed on slope decreases more rapidly and the stable speed on slope is lower at a higher altitude when the altitude is between 3 000 m and 5 000 m. Then, the maximal gradient of highway with design speed 100, 80 and 60 km?h-1 in highaltitude area was proposed. Compared with that specified at the same design speed in general area in existing standard, it decreases by 1%~2%.

Key words:highway; high altitude; maximal gradient; truck; climbing performance