路面结构层厚度对级配碎石应力状态的影响分析

The analysis of stress state of the graded broken stone on different thickness of pavement structure

级配碎石材料作为柔性材料的一种,在组合式基层以及半刚性基层沥青路面补强结构中大量应用,具有良好抵抗反射裂缝、排水的作用。在路面结构层中具有明显的应力依赖性,与其所处层位、各结构层厚度与模量等均直接相关。在路面结构设计中通常仅对基本参数取值而忽略其应力依赖性,特别是在补强路面结构中,由于受高程限制,补强层厚度对其力学性能影响尤为重要,主要对补强结构设计中各结构层厚度对级配碎石应力状态影响进行分析。

As a kind of flexible material,graded broken stone material is widely used in the combined base and semi-rigid base asphalt pavement reinforcement structures for its good effect in resistance reflection crack and drainage.It has obvious stress dependence in the pavement structure layer,and the layers,each layer thickness and modulus are directly related.Usually,in pavement structure design,only basic parameter is selected and its stress dependence is ignored,especially in reinforcing the pavement structure,due to the height limit,reinforcing layer thickness has particularly important effects on the mechanical properties.This paper mainly analyzes the impact of the thickness of each layer in the design of reinforcement structure on the graded broken stone stress statement.