基于FWD的沥青层反算模量修正系数  

Back calculated modulus correction coefficient for asphalt concrete layer based on FWD

作　　者：徐艳玲[1] 唐伯明[1] 谢国栋[2] 陈森[1] 

机构地区：[1]重庆交通大学山区道路结构与材料重庆市重点实验室,重庆400074 [2]天津市政工程设计研究院,天津300051

出　　处：《长安大学学报（自然科学版）》2012年第3期24-29,共6页Journal of Chang’an University(Natural Science Edition)

基　　金：交通运输部西部交通建设科技项目(2008 318 000 99)

摘　　要：针对室内沥青混合料试验动弹模量与无损检测反算模量存在一定的差异,通过试验路的铺筑、落锤式弯沉仪(FWD)现场测试、试验路的钻芯取样、沥青混合料的旋转压实成型、室内动三轴试验、各沥青层模量的复合和试验路结构模量的反算,得到了沥青混凝土层室内试验动弹模量ES与无损检测反算模量EB,并对二者试验结果处理分析,得到了沥青层反算模量修正系数K,即K=EC/EB。研究结果表明:根据K的取值可以确定现有路面实测状况下路面结构沥青层的动弹模量,更加方便路面承载能力的评定,同时也为路面加铺设计中相应的设计参数提供了依据。Aiming at the differences between laboratory dynamic elastic modulus and back calculated modulus of asphalt concrete layer,through paving test section,conducting falling weight reflectometer（FWD） field testing,coning sample,modeling species with gyratory compaction method,doing dynamic triaxial test,calculating composite-laboratory modulus and back caculating modulus of asphalt layer,the relationship between the laboratory dynamic elastic modulus ES and the back calculated modulus EB of asphalt concrete layer was presented.The correction coefficient K（K=EC/EB） of back caculated modulus was calculated.The results show that the resilient modulus of field asphalt concrete layer can be got according to K value,which is more convenient for evaluating the bearing capacity of existing road,and it can be taken as design parameters in the structural design method of overlay.

关 键 词：道路工程 沥青混凝土 FWD 室内试验动弹模量 无损检测反算模量 模量修正系数K 路面结构承载能力 

分 类 号：U416.2[交通运输工程—道路与铁道工程]