摘要
通过沥青混合料小梁的室内二级荷载疲劳试验,模拟旧路沥青面层材料加铺前和加铺后的疲劳损伤特性。运用混凝土材料等效损伤理论,进行了半刚性基层荷载作用次数在加铺前后的换算,系统地提出了包括旧路面层和基层的剩余寿命预估、加铺层设计和验算在内的沥青加铺层设计方法,并采用此方法对山东省东港高速公路加铺结构进行设计。分析结果表明:初拟结构一、二的疲劳寿命都能满足交通量的要求,但是考虑到经济因素以及各结构层疲劳寿命与交通量的协调性,建议采用12cm LSPM-25的结构二作为东港高速公路的加铺结构。
The fatigue performances of old asphalt pavement before and after overlay were simulated by asphalt mixture fatigue tests with two-amplitude load in laboratory. The theory of equivalent damage was used to make conversion from the loading frequencies of old base course before overlay to that after overlay. The formula was founded to forecast the remnant lives of old pavement surface and base course after overlay. Overlay design method considering remnant life of old pavement and checking computation of overlay construction were proposed. The method was applied in maintenance of Donggang Expressway in Shandong Province. Analysis result indicates that the overlay fatigue lives of the two structures both meet the requirement of traffic volume of Donggang Expressway. Considering economic benefits and the harmony between traffic volume and overlay fatigue life, the second overlay structure with twelve centimeters LSPM-25 is more suitable for Donggang Expressway. 5 tabs, 4 figs, 10 refs.
出处
《交通运输工程学报》
EI
CSCD
北大核心
2009年第2期17-21,38,共6页
Journal of Traffic and Transportation Engineering
基金
国家863计划项目(2006AA11Z110)
江苏省普通高校研究生科研创新计划项目(CX07B-156Z)
关键词
路面工程
加铺设计
剩余寿命
二级荷载疲劳试验
等效损伤
pavement engineering
overlay design
remnant life
fatigue test with two-amplitude load
equivalent damage
