路面结构层对高速公路加宽路基沉降的影响研究

Study on the influence of pavement structure layer parameters on the settlement of expressway widened subgrade

为了预防和控制高速公路加宽工程路基出现差异沉降,保障工程质量,利用有限元法,系统分析了路面面层模量与厚度、基层模量与厚度、土基模量等对高速公路加宽路基沉降变形的影响规律。结果表明:路面结构层参数对于高速公路加宽路基的受力与变形特性具有显著的影响,高速公路加宽路基的沉降量随着路面结构层厚度和刚度的增大而显著减小,提升路面结构层的厚度和刚度可以有效预防高速公路加宽工程出现差异沉降。

In order to prevent and control the differential settlement of expressway subgrade widening project and ensure the engineering quality,the influence of pavement layer modulus and thickness,base layer modulus and thickness,subgrade modulus on settlement deformation of expressway widening subgrade were analyzed systematically by using finite element method.The results show that parameters of the pavement structure layer have a significant effect on the mechanical and deformation characteristics of the widened subgrade.The settlement of expressway widening subgrade decreases significantly with the increase of the thickness and stiffness of pavement structure layer.Improving the thickness and stiffness of pavement structure layer can effectively prevent differential settlement in expressway widening project.