无损检测技术在城市旧路改造中的应用  

Application of Nondestructive Testing Technology in Urban Old Road Reconstruction

作　　者：吕耀志[1,2] 邹宝刚 徐鹏逍[1] 张建根[1] 

机构地区：[1]天津市市政工程设计研究院,天津300051 [2]天津市基础设施耐久性企业重点实验室,天津300021 [3]天津市交通运输工程质量安全监督总站,天津300051

出　　处：《中国市政工程》2017年第2期21-23,27,共4页China Municipal Engineering

基　　金：天津市交通运输科技发展计划项目(2016A-02-01);天津市市政工程设计研究院科技项目(2013KYYJYT30)

摘　　要：为验证探地雷达在城市旧路改造中对现有道路检测结果的准确性与适用性,以天津滨海新区市中心某道路为例,运用探地雷达对其健康状况进行检测与评估,提出雷达反射回波的经验性解释。将检测结果与贝克曼梁法弯沉测试及钻孔取芯结果进行对比,结果表明探地雷达测试结果与2种检测手段结果基本一致。在工程实测中发现,路基填筑材料的不均匀性导致电磁特性存在较大差异,这时探地雷达的判断与弯沉测试不一致,易导致雷达回波反射产生误判。In order to verify the accuracy and applicability of ground penetrating radar(GPR)in existing road test results of existing urban road reconstruction,and taking some road in Binhai New Area in Tianjin for example,GPR is used to make test & evaluation of the road health condition,and the empirical explanation of GPR reflection echo is presented.The testing results are compared with the results of Beckman method and the drilling & coring method,and the results show that the test results of GPR are consistent with those of these two kinds of detection methods.In the engineering survey,it is found that the inhomogeneity of the roadbed filling material causes the electromagnetic characteristics to be quite different.At this time,the judgment of GPR is inconsistent with the deflection test,which can lead to the misjudgment of the radar echo reflection.

关 键 词：探地雷达 旧路改造 弯沉测试 无损检测 

分 类 号：U418.8[交通运输工程—道路与铁道工程]