软弱岩土挖方段公路路基换填深度研究

Research on the Replacement Depth of Highway Subgrade for Soft Rock-soil Excavation

软弱岩土挖方段路基换填深度一直是业内备受关注且未能较好解决的一个问题。文中基于路基路面协同设计的思想,结合贵州省高速公路所惯用的典型沥青路面结构,采用动变形控制方法对重交通条件下软弱岩土挖方段路基适宜换填深度展开研究,给出了软弱岩土挖方路基强度与换填深度之间的对应关系。研究成果可供路面结构和交通荷载相近的省份设计参考。

The replacement depth of highway subgrade for soft rock-soil excavation has been a problem that has been concerned and failed to solve successfully. In this paper based on the idea of collaborative design of subgrade and pavement, combining with the typical asphalt pavement structure of expressways in Guizhou Province, the dynamic deformation control method has been used to study the suitable replacement depth of highway subgrade for soft rock-soil excavation under heavy traffic conditions, and the correspondence between the replacement depth and strength of subgrade for soft rocksoil excavation is put forward. The research results can provide reference for the provinces with similar pavement structure and traffic load.