动水压力作用下沥青路面渗水量影响分析  

Analysis on Infiltration Capacity in Asphalt Pavement Subjected to Dynamic Hydraulic Pressure

作　　者：高俊启[1] 盛余祥 张世铎 于凤强 蒋泽民[1] 

机构地区：[1]南京航空航天大学航空宇航学院,南京210016 [2]日照市公路管理局,日照276826

出　　处：《南京航空航天大学学报》2013年第2期266-270,共5页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：国家自然科学基金(51078183)资助项目

摘　　要：沥青路面渗水量对于沥青路面内部排水设计非常重要。为计算动水压力作用下沥青路面渗水量,实地测试了不同车速下沥青路面表面的动态水压力数值,建立了动态水压力与车速的关系。根据变水头试验方法,测试了沥青混合料芯样在40～350kPa水压力下的渗透系数,建立了沥青混合料渗透系数与水压力的关系。为研究路面在交通荷载作用下的动态渗透性能,设计了动态渗透试验测量系统。建立了动水压力作用下沥青路面渗水量的计算模型。结果表明:沥青路面渗水量与路面渗透系数、轮胎有效接地面积成正比,与路面厚度成反比;随车速增加,动水压力作用下沥青路面渗水量减小。It is important of infiltration capacity for the drainage design in asphalt pavement. In order to calculate infiltration capacity in asphalt pavement subjected to dynamic hydraulic pressure, the dynamic hydraulic pressures in asphalt pavement at some running speeds are measured, and the relationship of the hydraulic pressure and car speed is built. Furthermore, a falling head permeameter method is used to measure the permeability coefficients of asphalt mixture exposed to hydraulic pressures whose peak values are from 40 to 350 kPa, and the correlation between permeability and hydraulic pressure is obtained. In addition, a dynamic permeability test system is presented to measure the dynamic permeability of asphalt mixture subjected to vehicle impulsive pressures, and the calculation formula for calculating infiltration capacity in asphalt pavement subjected to dynamic hydraulic pressure is established. The results show that the infiltration capacity is proportionate to the permeability coefficient and effective tire ground area respectively, and is inversely proportional to the thickness of asphalt pavement. The infiltration capacity decreases with the increment of car＇s speed.

关 键 词：道路工程 沥青路面 动水压力 渗透系数 渗水量 

分 类 号：U416.217[交通运输工程—道路与铁道工程]