长大纵坡的沥青路面受力研究

长大纵坡沥青路面常见的典型病害类型是车辙和水损害.为研究我国华南地区长大纵坡沥青路面在高温下的力学性能,以广乐高速为案例,采用有限元方法对广乐高速工可阶段三种典型路面结构进行了压应变和最大剪应力分析,最终得出3层高模量沥青路面结构有利于提高沥青路面的抗车辙和抗剪切能力.同时,针对重载下坡沥青路面,提出采用OGFC作为磨耗层可有效减少坑槽等水损害的发生.

Investigation of Stress Status on Large Longitudinal Slope of Asphalt Pavement

Rutting and water damage are tapical types of the damages which ordinarily happen on large longitudinal slope of asphalt pavement. In order to investigate the mechanical behavior under high temperature on large longitudinal slope of asphalt pavement in South China, this paper put Guangzhou-Lechang highway as an example. The author analyzed the compression strain and maximum shear of three tapical different pavement structures in the period of the engineering feasibility study to Guangzhou-Lechang highway. Finally, the autor arrived at a conclusion that three-layer high modulus asphalt pavement structure was in favor of improving the anti-rutting and anti-water damage capabilities of asphalt pavement. At the same time, for overloading downslope asphalt pavement, the autor proposed to apply OGFC as wearing layer to effectively decrease the water damages, for example, slots.