重载作用下沥青路面结构层应力场分析

Analysis on the Stress Fieid of Asphalt Pavement Structure under Heavy Load Traffic

造成沥青路面出现破损甚至早期破损的原因不一,传统的沥青路面设计方法对重载交通下的沥青路面力学响应考虑不足,基于这一点本文从理论上对重载作用下沥青路面结构层的应力场进行分析。方法:运用多层弹性体系理论,双圆均布荷载下,考虑车辆轴载的变化,分析半刚性基层沥青路面结构层力学响应的变化规律和影响因素。结果:重载下路面结构层力学响应明显,应力指标变化显著。结论:沥青路面设计过程中应充分考虑重载影响并加以控制。

There are many reasons which causes serious initial failures of asphalt pavement. The mechanical responds of asphalt pavement under heavy traffic in traditional design methods have not been considered sufficiently. So this paper analysed the mechanical responds of the road structure under heavy - load. Using the multilayered elastic system the- ory, under the style of double rounds uniform load, considering the change of axle load, this paper present the changing rules and influencing factors of mechanical responds of the semi - rigid base course asphalt pavement structure. The results indicated that heavy axle load has remarkable influences to the asphalt pavement stress value. As a result, the influence of heavy tragic should be fully considered and controlled in the design process.