国省道沥青路面使用性能模型

为实现国省道沥青路面的使用性能评价,采用路面状况指数模型P=P₀{1-exp[-(α/y)^β]},对该模型中α、β参数确定方法进行了研究.以山东省为例,对近10 a来国省道沥青路面结构、交通资料、养护历史等方面进行了全面调研,通过分析沥青层厚度和车道的日大型车辆作用数对沥青路面使用性能的影响,建立了α、β与沥青层厚度和车道的日大型车辆作用数间关系式.通过分析土基和基层结构的承载能力,对α提出了综合修正方法,所建立的α、β表达式简洁适用,可方便分析某沥青层厚度和交通水平下沥青路面的性能变化规律,为国省道的路面结构性能评价和建设养护投资决策提供指导.

Asphalt Pavement Performance Model of National and Provincial Highway

The information of national and provincial highway in Shandong province including pavement structure, traffic load , maintenance history etc, were investigated deeply. The pavement performance model P=P₀{1-exp[-(α/y)^β]} was adopted and the parameters of α, β were discussed in detail. Two major factors, ie the thickness of asphalt mixture and large vehicle number per lane in one day, were taken into account, and the parameters α, β in the model P were expressed by the above two factors. The expression of α, β were revised by the bearing capacity of embankment and base type and it could be extended to other provinces after regional environment revision. The α, β could be used conveniently to evaluate the applicability of asphalt thickness in a level of traffic, which could help to make investment decision and maintenance plan for highway department.