基于有限元的纤维沥青碎石封层适应性研究

Study on Adaptability of Fiber-reinforced Asphalt Chip Based on Finite Element Method

纤维沥青碎石封层作为一种新兴的养护技术,其养护效果与交通荷载与旧路状况密切相关。为了分析研究该封层的受力状况,从而探讨其具体的应用条件,通过建立有限元分析模型,计算分析该封层对交通及旧路状况的适应性。结果表明,轴载和车速虽然对封层结构的应力有一定的影响,但超载及低速行车不足以破坏封层。旧路加铺封层时,旧路面的强度降低不应超过30%,旧路裂缝宽度大于2 mm时,应进行灌封处理。

As a new maintenance technology,the maintenance effect of fiber-reinforced asphalt chip is closely related to the traffic load and the condition of the old road.In order to analyze the stress condition of the seal and explore its specific application conditions,this paper establishes a finite element analysis model to calculate and analyze the adaptability of the seal to the traffic and the condition of the old road.The results show that although axle load and vehicle speed have a certain impact on the stress of the seal structure,overload and low-speed driving are not enough to destroy the seal.When the old road is paved with sealing layer,the strength reduction of the old road shall not exceed 30%.When the crack width of the old road is greater than 2 mm,it shall be potted.