FWD荷载下沥青路面动力响应的温度影响作用研究  

Study on Dynamic Response of Asphalt Pavement under FWD Load Base on Different Temperature Conditions

作　　者：曾杰 肖川[2,3] 李保险 徐田兵 

机构地区：[1]四川成德南高速公路有限责任公司,四川成都610041 [2]西南交通大学土木工程学院,四川成都610031 [3]西南交通大学道路工程四川省重点实验室,四川成都610031

出　　处：《公路工程》2015年第1期107-111,161,共6页Highway Engineering

基　　金：四川省交通厅科技项目(2010B28-2);中央高校基本科研业务费专项资金项目(SWJTU12ZT05)

摘　　要：为研究不同温度条件下沥青路面的实际动力响应规律,铺设了3种典型沥青路面试验路,通过落锤式弯沉仪(FWD)开展了温度对路表动态弯沉盆特性的影响作用分析,并通过动态应变传感器获取了不同温度下FWD荷载产生的沥青层底应变响应。研究结果表明:路表动态弯沉盆的各测点弯沉值随径向距离的增加逐渐减小,随荷载水平的增加逐渐增大,随路面温度的增加显著增大;随着温度的提高,路表动态弯沉盆的影响范围显著减小;通过回归分析方法确定沥青层底应变响应的温度修正系数,有助于实现实际温度下的应变响应向标准参照温度的转换。In order to study the real dynamic response regularity of asphalt pavement in different temperature conditions,the test roads of 3 typical asphalt pavements were paved. According to the FWD test,the temperature influence on characteristics of dynamic deflection basin was researched,and the dynamic strain sensors at the bottom of asphalt surface layer were used to study the dynamic strain under the FWD load. The results show that： The dynamic deflection of each sensor decreases with the radial distance reducing. And with increment of load level and pavement temperature,the dynamic deflection increases apparently. Furthermore,the influence sphere of dynamic deflection decreases with the temperature increasing. According to regression analysis,the temperature correction fact is calculated,and it is useful to make transformation between the dynamic stains in measured temperature and standard temperature.

关 键 词：道路工程 动力响应 沥青路面 温度 落锤式弯沉仪(FWD) 

分 类 号：U416.217[交通运输工程—道路与铁道工程]