基于GPRMax2D的地下管线精细化探测方法

doi:10.11720/wtyht.2019.1314

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Abstract

Ground penetrating radar (GPR) is an important shallow geophysical detection method for detecting underground structures and their distribution regularity.It has the advantages of high resolution,non-destructiion,strong anti-interference capability and intuitive results,and is widely used in the field of engineering geophysical exploration.In order to improve the understanding of the characteristics of the underground pipeline radar image,determine the location of the abnormal body of pipeline,and improve the interpretation precision of GPR,the authors used FDTD method to detect the underground pipeline,which includes the numerical simulation of the factors affecting the depth of pipeline,material,filling material and pipeline disease.On such a basis,a forward modeling synthetic library of underground pipelines was established to guide the interpretation of the ground-penetrating radar images.The field pipeline detection results show that the ground penetrating radar can accurately detect the buried position and operation status of underground pipelines,and provide a basis for future maintenance.

Key words： ground penetrating radar forward simulation GPRMax2D pipeline detection

Received: 03 September 2018 Published: 10 April 2019

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	Articles by authors
	Jun-Wei ZHANG
	Bing-Feng LIU
	Xue LI
	Quan-Bing ZHU
	Yue-Qin REN

Cite this article:

Jun-Wei ZHANG,Bing-Feng LIU,Xue LI, et al. Refined detection method of underground pipeline based on GPRMax2D[J]. Geophysical and Geochemical Exploration, 2019, 43(2): 435-440.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2019.1314 OR https://www.wutanyuhuatan.com/EN/Y2019/V43/I2/435

Working principle of ground penetrating radar

Model parameters

Dielectric parameters of media

Forward simulation of pipeline-material-buried depth

FDTD forward simulation of pipeline-material-buried depth

Forward simulation of water filling pipeline-material-buried depth

FDTD forward simulation of water filling pipeline-material-buried depth

Forward simulation of water filling pipeline-material-buried depth-cavity

FDTD forward simulation of water filling pipeline-material-buried depth-cavity

Forward simulation of water filling pipeline-material-buried depth-leakage

FDTD forward simulation of water filling pipeline-material-buried depth-cavity

Image of GPR detection

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