柔性路面路基土的永久变形

提出了一种柔性路面路基土在车辆重复轴载作用下的永久变形的计算方法，采用现行路基路面设计理论中将应力分析和应变分析分别处理的通行准则，结合本文作者提出的一个路基土永久变形特性的实用模型，给出了计算永久变形的步骤并演示了一个算例，还分析了路基土的永久变形对柔性路面结构中两种常见损伤模式的影响。

Permanent Deformation of Subgrade Soils in Flexible Pavement

A practical method for calculating permanent deformation of subgrade soils in flexible pavements is proposed. Based on the general principle that stress analysis and strain calculation are not integrated through the rigorous constitutive matrix in the design and analysis of flexible pavements, a permanent deformation model is used in the investigation, and the steps to calculate the permanent deformation are given, with a calculation example demonstrated. Meanwhile, the influence of permanent deformation on the two major pavement distresses is also explored. The general concept proposed in the paper is also helpful to the better understanding of the design theory of highway flexible pavements and railroad tracks.