基于控制裂缝和车辙的半刚性基层沥青路面力学行为分析  

Mechanical Behavior Analysis of Semi-rigid Asphalt Pavement Based on the Crack and Rutting Control

作　　者：李海滨[1,2] 赵海生[2,3] 沙爱民[2] 盛燕萍[4] 

机构地区：[1]西安科技大学建筑与土木工程学院,西安710054 [2]长安大学特殊地区公路工程教育部重点实验室,西安710064 [3]山东省交通科学研究所,济南250031 [4]长安大学交通铺面材料教育部工程研究中心,西安710064

出　　处：《武汉理工大学学报》2014年第4期65-72,共8页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(52108047);国家西部交通建设项目(200631881218);河北省省级计划项目(Y-2011004;Y-2011005)

摘　　要：针对目前重载车辆、高性能材料和大厚度结构层的采用，结合半刚性基层沥青路面在使用过程中出现的裂缝和车辙，通过分析不同荷载情况下半刚性基层和沥青面层在改变厚度和模量时的路面结构力学行为，研究路表弯沉、层底拉应力、拉应变和剪应力、剪应变的变化，提出了可以减少路面裂缝和车辙的半刚性基层和沥青面层的厚度和模量范围，改善了路面结构层受力，增强半刚性基层在高等级路面结构中的适应性。分析结果表明：控制裂缝为目的时，沥青面层厚度宜选用17～24cm，半刚性基层厚度宜选用35-50cm；沥青面层模量不宜大于2500MPa，半刚性基层模量宜在1400-2500MPa；控制车辙为目的时，沥青面层厚度宜选择16-25cm，模量宜为1800-3000MPa，半刚性基层模量宜为1600-3000MPa。Adopting heavy vehicle, high performance materials and large thickness structure layer, combined with the growing crack and rutting, the changes of deflection on the surface, tensile stress, tensile strain, shear stress and shear strain were analyzed under the different loads, thickness and modulus. Then the range of thickness and modulus of semirigid base and asphalt pavement was proposed. It improves the force of structure and enhances the applicability of semirigid base in the high grade pavement structure. The experimental results show that if the purpose is to control crack, the thickness of semi-rigid base and asphalt pavement is 35-50 cm and 17424 cm respectively, asphalt pavement modulus is less than 2 500 MPa, and semi-rigid base modulus is in the range of 1 400-2 500 MPa. If the purpose is to control rutting, the thickness of asphalt pavement is 16-25 cm, the modulus is in the range of 1 800-3 000 MPa, and the semi-rig- id base modulus is in the range of 1 600-3 000 MPa.

关 键 词：沥青路面 半刚性基层 路面裂缝 车辙 层底应力 剪应力 模量 

分 类 号：U416.2[交通运输工程—道路与铁道工程]