沥青路面初期损坏特点和机理分析——重交通沥青路设计方法之一

随着交通量的增加、轴载的增大和高等级公路上行车速度的提高，按照传统沥青路面规范修建的道路出现了严重的初期损坏现象，中国现行的路面技术遇到了强有力的挑战。为了改进现行的沥青路面设计技术，作者对路面的损坏状况进行了调查和力学分析，提出了6种新型的路面损坏形式。研究表明，传统路面设计技术仅仅适用于低等级道路路面的设计；在高等级道路上，高速行车引起的动水压力已成为造成路面初期损坏的不可忽视的重要因素；轮胎－路面接触压力的非均布效应十分显著，已成为路面结构局部损坏的重要肇因；当然，超载的影响也是十分严重的。这三方面的综合作用是造成路面初期损坏乃至早期损坏的主要原因。

Characteristics and Mechanism of Initial Failures on Asphalt Pavement——Design Method for Heavy-duty Road(part1)

Along with the increasing of traffic volume,vehicle's speed and axle load in recent years,serious initial failures occurred on the heavy-duty asphalt pavements constructed according to the conventional specifications.To improve the pavement design methods,the field investigation and mechanistic analysis have been conducted,and six new types of distress were addressed herein.The research indicates that the conventional pavement technique can only be suitable for the normal pavement design but not for the heavy-duty pavements.On high-grade highways,the dynamic hydraulic pressure applied to pavement under the moving-vehicles' tyres became an unneglectable first factor causing pavements' initial failures,the non-uniformly distributed load is another important factor,which will cause the local damage,and the third factor is the overload.