Combined GPR and Non-Contact Surface Wave Measurements for the Investigation of Pavement Structure

Inazaki, Tomio; Imamura, Sugio; Kisanuki, Hiroshi; Hayashi, Koichi

doi:10.4133/sageep.29-055

Cited by 1 publication

(1 citation statement)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The detection principle of GPR is as follows: When the emitted electromagnetic waves (frequency range is 10-2200 MHz) transmit in the underground, the electromagnetic waves, arriving at the interface of inhomogeneous permittivity, will produce the phenomenon of reflection and refraction. And then, the signals of reflected waves, that is, echo, can reflect the characteristics of underground medium [5,6]. As a nondestructive testing technology, GPR has received more and more attention [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Dielectric Characteristics of Unsaturated Loess and the Safety Detection of the Road Subgrade Based on GPR

et al. 2018

Journal of Sensors

View full text Add to dashboard Cite

We present a moisture content and permittivity model to simultaneously detect and estimate defects in loess subgrade. Based on the ground-penetrating radar (GPR) method, the dielectric properties of loess in the northwest of China and the imaging feature of the moisture content of different strata were studied. The relative permittivity of loess with different moisture contents was experimented in the laboratory. It was found that the relative permittivity of unsaturated loess was positively related to moisture content. The relationship between relative permittivity and moisture content in different antenna frequencies of GPR was analyzed. Electromagnetic wave reflection rules in the loess interface were studied using the numerical method with different moisture contents. With the increase in moisture content, the amplitude of GPR was increased. When the above conclusions were applied in the engineering practices, there are good effects to detect the defects of the road subgrade. It is a significant guidance for determining the qualitative research of defects in the roadbed.

show abstract

Section: Introductionmentioning

confidence: 99%

Dielectric Characteristics of Unsaturated Loess and the Safety Detection of the Road Subgrade Based on GPR

et al. 2018

Journal of Sensors

View full text Add to dashboard Cite

show abstract

Combined GPR and Non-Contact Surface Wave Measurements for the Investigation of Pavement Structure

Cited by 1 publication

References 3 publications

Dielectric Characteristics of Unsaturated Loess and the Safety Detection of the Road Subgrade Based on GPR

Dielectric Characteristics of Unsaturated Loess and the Safety Detection of the Road Subgrade Based on GPR

Contact Info

Product

Resources

About