沥青路面路基工作区深度影响因素的研究  

Study of Influence Factors on Asphalt Pavement Subgrade Workspace Depth

作　　者：刘小兰 陈郝 李自林 LIU Xiao-lan;CHEN Hao;LI Zi-lin(Civil Engineering College, Tianjin Chengjian University,300384, Tianjin, China;BCEG NO.6 Construction Engineering CO., LTD., 100143, Beijing, China;Hebei Key Laboratory of Geotechnical Engineering Safety and Deformation Control (Hebei University of Water Resources and Electric Engineering), 061001, Cangzhou, Hebei, China)

机构地区：[1]天津城建大学土木工程学院,天津市300384 [2]北京建工六建集团有限责任公司,北京市海淀区061001 [3]河北省岩土工程安全与变形控制重点实验室(河北水利电力学院),河北省沧州市061001

出　　处：《河北水利电力学院学报》2021年第3期7-12,共6页Journal of Hebei University Of Water Resources And Electric Engineering

基　　金：国家自然科学基金项目(51178456)。

摘　　要：针对当前未考虑道路结构层参数、车辆动荷载、行车速度对沥青路面路基工作区深度的影响现状,文中借助有限元软件,分析了38种道路结构层参数、5种车辆动荷载和2种行车速度对沥青路面路基工作区深度的影响。结果表明铺面结构层模量对路基工作区深度的影响较小,而铺面结构层厚度对路基工作区深度的影响较大,特别是基层厚度对路基工作区深度的影响尤为显著;土基模量对路基工作区深度影响显著,但随着土基模量的增加,路基工作区深度增加;车辆动荷载对路基工作区深度的影响呈线性正相关,且车辆动载每增加50kN,路基工作区深度增加约1m;行车速度对路基工作区深度的影响呈正相关,且行车速度每增加10m/s,路基工作区深度增加约0.4~1.4m。Because the influence of structure layer parameters,vehicle dynamic load and speed on asphalt pavement sub-grade workspace depth is not considered,this paper analyzes the influence factors of asphalt pavement sub-grade work area depth with the finite element software,including 38 kinds of road structure layer parameters,5 kinds of vehicle dynamic load and 2 kinds of driving speed.The results are as follows:modulus of pavement has less effect on the sub-grade work area depth,but thickness of pavement has more effect on the sub-grade work area depth,particularly thickness of the grass-roots level.Modulus of soil base has great effect on the sub-grade work area depth,and the sub-grade work area depth increases with the increase of modulus of soil base.The vehicle dynamic load has a linear positive correlation with the sub-grade work area depth,and when the vehicle dynamic load increases 50KN,the sub-grade work area depth increases about 1 m.The vehicle speed has a linear positive correlation with the sub-grade work area depth,and when the vehicle speed increases 10m/s,the sub-grade work area depth increases about 0.4-1.4 m.

关 键 词：沥青路面 结构层参数 车辆动荷载 行车速度 路基工作区深度 

分 类 号：U416.1[交通运输工程—道路与铁道工程]