重载条件下路基工作区深度影响因素分析

路基的工作区深度直接影响到软土地基的处理深度及费用,为保证路基的稳定及经济,需要明确不同荷载条件下的路基工作区深度。本文通过有限元法,系统分析了轴载、面层厚度、基层厚度等因素对路基工作区深度的影响规律。计算结果表明:路基工作区的深度随着轴载的增大而增大,随着路面面层厚度和基层厚度的增大而减小。实际工程中,应该根据车辆荷载状况、路面结构层厚度等因素综合计算确定路基工作区深度,以及软土地基的合理处理深度。

ANALYSES ON THE INFLUENCE FACTORS OF SUBGRADE SERVICE DEPTH UNDER HEAVY-LOAD CONDITION

The working depth of subgrade directly affects the treatment depth and cost of soft soil foundation.In order to ensure the stability and economy of subgrade,it is necessary to define the depth of subgrade work under different loading conditions.In this paper,the influence of the axial load and the thicknesses of the surface layer and the base on the depth of subgrade work is systematically analyzed by the finite element method.The calculation results show that the subgrade working depth increases with the increase of axle load,and it decreases with the increasing of surface course thickness and base course thickness.In the practical engineering,the subgrade working depth and soft soil foundationtreatment depth should be defined according to the conditions of vehicle load and the thickness of pavement structure layer.