摘要
针对刚性基层沥青路面的反射裂缝问题,提出采用OLSM-25(Open-graded Large Stone Asphalt Mixes,OLSM)作为防裂层的方法,以国内外OLSM参考级配为基础,结合试验段修筑情况,采用三维有限元方法,建立设置OLSM-25防裂层的沥青路面有限元模型,对其车辆荷载应力进行有限元数值分析,提出OLSM-25防裂层荷载应力的实用计算公式,为设置OLSM-25防裂层的沥青路面结构设计提供理论依据.结果表明:在车辆荷载偏载作用下,轴载、贫混凝土基层厚度、沥青面层厚度、OLSM-25防裂层模量及厚度对OLSM-25防裂层的荷载应力具有显著影响.
In view of the problem of the reflective cracking in the rigid base asphalt pavement, a method of using Open-graded Large Stone asphalt Mixes (OLSM) as the anti-cracking layer is proposed. On the basis of the reference gradation of OLSM in the domestic and international, combined with the test roads construction, by means of three-dimensional finite element method, the finite element model of asphalt pavement with OL- SM-25 anti-cracking layer has been established. Finite element numerical analysis on traffic load stress of asphalt pavement with OLSM-25 anti-cracking layer have been done. And practical formula of traffic load stress for OLSM-25 anti2craeking layer has been proposed. All these provide a theoretical basis for structural design of asphalt pavement with OLSM-25 anti-cracking layer. The result show that: under the action of the asymmetric traffic load, axle load, thickness of lean concrete base, thickness of the asphalt surface layer, modulus and thickness of OLSM-25 anti-cracking layer have significant influence on the traffic load stress of OLSM-25 anticracking layer.
出处
《郑州大学学报(工学版)》
CAS
北大核心
2015年第5期88-91,共4页
Journal of Zhengzhou University(Engineering Science)
基金
中央高校基本科研业务费专项资金项目(CHD 2010JC011)
陕西省教育厅专项科研计划项目(14JK1067)
关键词
道路工程
开级配大粒径沥青碎石
三维有限元
车辆荷载应力
数值分析
防裂层
road engineering
open-graded large stone asphalt mixes
three-dimensional finite element
traffic load stress
numerical analysis
anti-cracking layer