Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography (한국측량학회지)

Korean Society of Surveying, Geodesy, Photogrammetry and Cartography (한국측량학회)
권호 표지
DOI QR코드

DOI QR Code

Study to Improve the Accuracy of Non-Metallic Pipeline Exploration using GPR Permittivity Constant Correction and Image Data Pattern Analysis

GPR 유전률 상수 보정과 영상자료 패턴분석을 통한 비금속 관로 탐사 정확도 확보 방안

  • Received : 2022.03.14
  • Accepted : 2022.04.19
  • Published : 2022.04.30
Download PDF
⟨ Previous Next ⟩

Abstract

GPR (Ground Penetrating Radar), developed as a technology for geotechnical investigations such as sinkhole exploration, was used limitedly as a method to resolve undetectable lines in underground facility exploration. To improve the accuracy of underground facility data, the government made it possible to explore underground facilities using a non-metallic pipeline probe from July 2022. However, GPR has a problem in that the exploration rate is lowered in the soil with high moisture content, such as soft soil, such as clay layer, and there is a lot of variation in long-term accuracy. In this study, as a way to improve the accuracy of exploration considering the characteristics of GPR and the environment of underground facilities, we propose a GPR exploration method for underground facilities using permittivity constant correction and pattern analysis of GPR image data. Through this study, the accuracy of underground facility exploration and high reproducibility were derived as a result of field verification applying GPR frequency band and heterogeneous GPR.

싱크홀 탐사 등 지반조사를 위한 기술로 개발된 GPR (Ground Penetrating Radar)은 지하시설물 탐사에서 불탐구간을 해소하기 위한 방법으로 한정되어 사용하고 있었다. 정부는 지하시설물 데이터의 정확도 개선을 위하여 2022년 7월부터 비금속 관로 탐사기를 이용한 지하시설물 탐사가 가능하도록 하였다. 그러나 GPR은 점토층 등과 같이 연약지반 같은 수분함량이 높은 지반에서 탐사율도 낮아지고, 정확도에 많은 변동이 발생하는 문제점을 가지고 있다. 본 연구에서는 GPR의 특성과 지하시설물의 환경을 고려한 탐사정확도 향상방안으로 유전률 상수 보정과 GPR 영상자료의 패턴분석을 이용한 지하시설물 GPR탐사 방안을 제시하고자 한다. 본 연구를 통하여 GPR 주파수 대역과 이기종 GPR을 적용한 현장검증 결과 지하시설물 탐사의 정확도 향상 및 높은 재현성 결과를 도출하였다.

Keywords

Acknowledgement

본 연구는 '공간정보품질관리원'의 연구지원에 의하여 진행되었으며, 관계자 여러분께 감사드립니다.

References

  1. Baek, J.E, and Choi, J.S(2016), Under Road Exploration Technology using GPR, Korea Society of Road Technical Articles, Vol. 16, No. 3. pp.11-16.
  2. Kim, T.Y, Kim, B.I, Kim, J.W, Park, H.M, and Yoon, J.S(2016), Determining the Optimal Frequency of Ground Penetrating Radar for Detecting Voids in Pavements, International journal of highway engineering v.18 issue 2, pp.37-42 https://doi.org/10.7855/IJHE.2016.18.2.037
  3. Kim, W, Lee K.W., and Kim, T.H(2021), A Study on Quality Level of Underground Spatial Information for Accuracy Improvement, Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, Volume 39 Issue 3, pp 167-177. https://doi.org/10.7848/KSGPC.2021.39.3.167
  4. Korea Society of Earth and Exploration Geophysicists (KSEG). (2002). Geophysical exploration guidelines for application in the civil engineering environment field, Korea Society of Earth and Exploration Geophysicists (KSEG).
  5. Lee, S.H, and Jang, I.H,(2019), A Sudy on the Underground Condition of Road Using 3D-GPR Exploration, Journal of the Korean Geoenvironmental Society Volume 20 Issue 2, pp.49-58 https://doi.org/10.14481/JKGES.2019.20.2.49
  6. MOCT (2002), The 1st National GIS Project White Paper.
  7. MOLIT (2013), White Paper of Underground Facilities, Computerized Business.
  8. Olhoeft, G. R. (1984). "Applications and limitations of ground penetrating radar. Expanded Abstracts." 54th Annual International Meeting and Exposition of the Society of Exploration Geophysicists, Atlanta, GA, pp. 147-148.
  9. RHee. J.Y, Shim, J.W, Lee, S.R., and Lee, K.H(2020), A Consideration on the Electromagnetic Properties of Road Pavement Using Ground Penetrating Radar (GPR), Journal of the Korean Society of Civil Engineers, Volume 40 Issue 3: pp. 285-294 https://doi.org/10.12652/KSCE.2020.40.3.0285
  10. Spatial Information Quality Management Service(SIQMS) (2021), A study on upgrading the underground facility management system, Research Paper.