摘要
目的分析辽宁省农村公路沥青路面病害特征,研究农村公路沥青路面结构设计指标,提出典型路面结构.方法针对农村公路沥青混凝土路面出现的各种病害进行调查分析,总结出对应于不同类型、不同程度病害产生的原因.结合半刚性基层沥青混凝土路面的力学特性和目前提出的多指标控制沥青路面结构设计的思想,提出适应于农村公路沥青路面的结构设计指标.应用所提出的指标进行分析,结合经济因素,提出不同交通等级下的典型路面结构.结果当基层模量衰变至小于300 MPa,基层材料处于松散状态时,面层层底产生拉应力,路表弯沉增加幅度显著.当提出的典型路面结构基层模量为900 MPa时,通过加大基层厚度很难实现特重交通的承载能力要求.结论辽宁地区农村公路沥青路面设计指标采用设计弯沉值和基层层底拉应力.考虑冬季低温的影响,验算沥青面层低温抗裂这一指标.
The disease characteristics and the design index of rural road asphalt pavement in Liaoning Province were studied to put forward the typical pavement structure. Based on the investigation and analysis of various diseases of asphalt concrete pavement in rural roads,the causes of the diseases with different types and different degrees were summarized. Based on the mechanical characteristics of asphalt pavement with semi rigid base and the design idea of multi index control asphalt pavement,the structural design indexes of asphalt pavement were put forward. Based on the analysis of the proposed indexes and the economic factors,the typical pavement structures are recommended under different traffic levels. When the base modulus decay to less than 300 MPa and base material was in a loose state,the tensile stress was generated in the bottom of surface layer,deflection increased significantly. When the base modulus of typical pavement structure proposed was900 MPa,severe traffic capacity requirements is difficult to be achieved by increasing the thickness of base. The design indexes of the rural road asphalt pavement in Liaoning area include the design deflection value and the bottom layer tensile stress. Considering the influence of lowtemperature in winter,the index of lowtemperature crack resistance of asphalt surface is checked.
出处
《沈阳建筑大学学报（自然科学版）》
CAS
CSCD
北大核心
2017年第6期1048-1054,共7页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(40673045)
关键词
农村公路
病害
设计指标
典型路面结构
rural road
disease
design index
typical pavement structure
