山区高速公路沥青路面的抗车辙能力

Anti-rut ability of asphalt pavement on mountain freeway

针对山区高速公路陡坡多、车辙严重的问题,分析了超载(包括轮压与汽车轴载等)对山区高速公路路面沥青混合料的影响以及长大纵坡对沥青路面抗车辙能力的影响。认为山区高速公路产生车辙的主要原因是长大纵坡导致了车辆低速行驶,车辆低速行驶对沥青混合料动稳定度的影响超过夏季高温和超载的影响。研究结果表明,减小坡度和控制坡长是提高路面抗车辙能力的有效方法。

The route vertical slope of mountain freeway is long and steep, and there are many overload and heavy load vehicles on it. The influences of the heavy load on the asphalt mixture of mountain expressway pavement, the long and steep slope on the rutting resistance of asphalt pavement are analyzed. It is found that the rutting in mountain expressway mainly results from the long and steep slope, the long and steep slope induces the low speed, the low speed of the automobiles has more important impact on the dynamic stability of hot mixture asphalt than the high temperature and heavy load. The results show that avoiding the long and steep slope during design is a good method to increase the anti-rut ability of asphalt pavement on mountain freeway. 1 tab, 2 figs, 7 refs.