Asphalt pavement characterization by GPR using an air-coupled antenna array

被引:12
|
作者
Liu, Hai [1 ,2 ]
Yang, Zefan [1 ,3 ]
Yue, Yunpeng [1 ]
Meng, Xu [1 ]
Liu, Chao [1 ,2 ]
Cui, Jie [1 ,2 ]
机构
[1] Guangzhou Univ, Sch Civil Engn, Guangzhou 510006, Peoples R China
[2] Guangzhou Univ, Guangdong Engn Res Ctr Underground Infrastruct Pro, Guangzhou 510006, Peoples R China
[3] Dev Res Ctr Nat Resource & Real Estate Assessment, Shenzhen 518000, Peoples R China
基金
中国国家自然科学基金;
关键词
Pavement characterization; Ground penetrating radar (GPR); Air -coupled antenna array; Common midpoint (CMP); Velocity spectrum; Refraction; DIELECTRIC PERMITTIVITY; THICKNESS; REFRACTION; ACCURACY; CONCRETE;
D O I
10.1016/j.ndteint.2022.102726
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Ground penetrating radar (GPR) has become an effective tool for asphalt pavement inspection. However, a ground-coupled GPR system cannot facilitate a high-speed survey due to the complex road environment and traffic condition. In this paper, an air-coupled antenna array is designed for measurement of common midpoint (CMP) GPR data. From the CMP data, an improved velocity spectrum algorithm considering the refraction on the pavement surface is proposed to simultaneously estimate the thickness and dielectric permittivity of the pave-ment layer. The results of a laboratory experiment demonstrate that the improved velocity spectrum method can greatly enhance the accuracy of the velocity and thickness estimations, compared with the traditional inversion method. A field measurement conducted on a highway pavement shows that the maximum error of the thickness estimation of the asphalt layer is less than 10 mm (7.1%). It is concluded that the developed CMP technique can be used for quantitative characterization of asphalt pavement.
引用
收藏
页数:8
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