沥青路面结构设计指标优化及合理厚度探究  

Optimization of Design Indicators and Exploration of Reasonable Thickness of Asphalt Pavement Structure

作　　者：赵楷文 张洪伟 全蔚闻 马宪永 董泽蛟[1] ZHAO Kai-wen;ZHANG Hong-wei;QUAN Wei-wen;MA Xian-yong;DONG Ze-jiao(School of Transportation Science&Engineering,Harbin Institute of Technology,Harbin Heilongjiang 150090,China;Inner Mongolia Autonomous Region Transport Development Research Institute,Hohhot Inner Mongolia 010051,China)

机构地区：[1]哈尔滨工业大学交通科学与工程学院,黑龙江哈尔滨150090 [2]内蒙古自治区交通运输科学发展研究院,内蒙古呼和浩特010051

出　　处：《公路交通科技》2022年第6期9-16,共8页Journal of Highway and Transportation Research and Development

基　　金：国家重点研发计划项目(2018YFB1600100);国家自然科学基金项目(U20A20315);中央高校基本科研业务费专项资金项目;内蒙古自治区交通运输厅科技项目(NJ-2020-04)。

摘　　要：随着我国交通领域的高速发展,多种沥青路面结构形式被提出并应用。现有的路面结构设计指标是针对典型路面结构所提出的,对非典型路面结构的适用性有待验证。为验证非典型沥青路面结构设计指标的适用性,明确典型路面结构的合理厚度范围,完善沥青路面结构设计方法,首先,建立了移动非均布荷载下典型与非典型沥青路面结构模型,依据力学响应规律,分析了路面结构设计指标。其次,对比了移动非均布荷载与静态双圆均布荷载作用下的路面使用寿命,并给出了每种路面结构的设计指标。最后,改变路面各结构层厚度,根据计算得到路面使用寿命,确定了半刚性基层路面的合理厚度范围。结果表明:静态双圆均布荷载下路面使用寿命计算值为移动非均布荷载下的0.7~0.9倍,在路面力学分析中应考虑荷载的非均布移动特性;对于半刚性基层路面、柔性基层路面、长寿命路面、倒装结构路面以及抗车辙路面,路基顶面竖向压应变可不作为设计指标考虑;路面类型对设计指标的适用性影响较大,设计指标应依据路面类型选取;对于半刚性基层路面,基层厚度小于250 mm时,路面使用寿命随沥青面层厚度的增加先增大后减小,控制指标由无机结合料层层底拉应力变为沥青混合料层永久变形量;面层厚度大于200 mm时,路面使用寿命控制指标为沥青混合料层永久变形量,增加面层厚度会降低路面使用寿命。With the rapid development of transport field in China, a variety of asphalt pavement structure forms have been proposed and applied. The existing pavement structure design indicators are proposed for typical pavement structures, their applicability to atypical pavement structures needs to be verified. In order to verify the applicability of structural design indicators of atypical asphalt pavement structures, to determine the reasonable thickness range of typical pavement structures, and to improve the structural design method of asphalt pavement, first, the typical and atypical asphalt pavement structural models under moving non-uniformly distributed load are established, and the design indicators of the pavement structures are analyzed according to the mechanical response rule. Then, the pavement service lives under moving non-uniformly distributed load and static double-circular uniformly distributed load are compared, and the design indicators of each pavement structure are given. Finally, change the thickness of each pavement structural layer, the reasonable thickness range of the semi-rigid base pavement is determined according to the calculated pavement service lives. The result shows that(1) the calculation value of pavement service life under static double-circular uniformly distributed load is 0.7-0.9 times of that under moving non-uniformly distributed load, thus the non-uniformly distributed load movement should be considered in pavement mechanics analysis;(2) for semi-rigid base pavement, flexible base pavement, long-life pavement, inverted structure pavement and anti-rutting pavement, the vertical compressive strain on the top of subgrade could not be taken as the design indicator;(3) the type of pavement has great influence on the applicability of the design indicators, so the design indicators should be determined according to the type of pavement;(4) for semi-rigid base pavement with base course thickness less than 250 mm, the service life of pavement increases first and then decreases with the

关 键 词：道路工程 结构设计优化 数值模拟 沥青路面 非均布移动荷载 

分 类 号：U416.217[交通运输工程—道路与铁道工程]