沥青路面最佳罩面厚度的确定

Selection on Optimum Overlay Thickness for Asphalt Pavement

针对目前国内沥青路面罩面设计方法的不足,借助于同济大学对新建和罩面改建后的沥青路面使用性能的研究成果,将寿命周期费用分析引入罩面设计,提出基于性能的沥青路面罩面设计方法。该方法主要包括两部分:一是对于新建路面和使用不久、路况尚好的路面,进行最佳罩面时机和最佳罩面厚度的选择(已在参考文献1中述及);二是对于已需进行罩面的路段,只进行最佳罩面厚度的选择,本文即是针对此情况。文中考虑了寿命周期和一个性能期罩面厚度的优化,给出了几个性能期最佳罩面厚度设计诺谟图。

This article presents asphalt pavement overlay design method based on Tongji University's research achievements about the performance of new and overlay asphalt pavements,with life cycle cost analysis incorporated in overlay design as well as performancebased overlay design method.The method mainly includes two parts: one is the selection of optimum overlay timing and thickness for new pavements or pavement in good condition.The other is the selection of optimum overlay thickness for pavement in need of overlay which is highlighted in this paper.Optimization of overlay thickness taking into account of lifecycle and one period performance is discussed with several design nomograms of optimum overlay thickness provided.