A Study on Monitoring Surface Displacement Using SAR Data from Satellite to Aid Underground Construction in Urban Areas

Woo-Seok Kim; Sung-Pil Hwang; Wan-Kyu Yoo; Norikazu Shimizu; Chang-Yong Kim

doi:10.9720/kseg.2024.1.039

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2024 Vol.34, Issue 1 Preview Page Next Page

Research Article

A Study on Monitoring Surface Displacement Using SAR Data from Satellite to Aid Underground Construction in Urban Areas 위성 SAR 자료를 활용한 도심지 지하 교통 인프라 건설에 따른 지표 변위 모니터링 적용성 연구

31 March 2024. pp. 39-49

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Abstract

The construction of underground infrastructure is garnering growing increasing research attention owing to population concentration and infrastructure overcrowding in urban areas. An important associated task is establishing a monitoring system to evaluate stability during infrastructure construction and operation, which relies on developing techniques for ground investigation that can evaluate ground stability, verify design validity, predict risk, facilitate safe operation management, and reduce construction costs. The method proposed here uses satellite imaging in a cost-effective and accurate ground investigation technique that can be applied over a wide area during the construction and operation of infrastructure. In this study, analysis was performed using Synthetic Aperture Radar (SAR) data with the time-series radar interferometric technique to observe surface displacement during the construction of urban underground roads. As a result, it was confirmed that continuous surface displacement was occurring at some locations. In the future, comparing and analyzing on-site measurement data with the points of interest would aid in confirming whether displacement occurs due to tunnel excavation and assist in estimating the extent of excavation impact zones.

Keywords

SAR

surface displacement

time series

underground transportation infrastructure

최근 도심지의 인구 집중 및 인프라 과밀현상에 따라 인프라 시설의 지하화 건설이 새롭게 부각되고 있으며, 기반 시설의 건설 및 운영 과정에서 안정성을 평가하기 위한 모니터링 시스템 구축은 중요한 부분이다. 이러한 모니터링 중 지반의 안정성을 평가하고 설계의 타당성을 확인, 위험 예측, 안전한 운영 관리, 건설 비용 절감에도 유용한 방법으로 건설 및 운영 중까지 사용 가능한 광역적 지역 대상으로 비용과 정확성을 고려한 지반조사 기법에 관한 연구가 필요한 부분이다. 이에 본 연구에서는 도심부 지하도로 건설 시 주변 지표 변위 관찰을 위해 SAR 자료를 이용하여 시계열 레이더 간섭기법을 통한 분석을 수행하였다. 그 결과, 일부 지점에서는 지속적인 지표 변위가 일어나고 있음을 확인할 수 있었으며, 추후, 주요 관심 지점 등에 대해서는 현장 실측한 계측자료와의 비교 ‧ 분석을 한다면 터널 굴착 영향에 따른 변위 발생 여부 확인 및 굴착 영향 범위 산정에 도움이 될 것으로 판단된다.

키워드

합성개구레이더

지표 변위

시계열

지하 교통 인프라

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Information

Publisher :Korean Society of Engineering Geology
Publisher(Ko) :대한지질공학회
Journal Title :The Journal of Engineering Geology
Journal Title(Ko) :지질공학
Volume : 34
No :1
Pages :39-49
Received Date : 2024-02-14
Revised Date : 2024-03-05
Accepted Date : 2024-03-07
DOI :https://doi.org/10.9720/kseg.2024.1.039

The Journal of Engineering Geology ISSN:1226-5268(Print) 2287-7169(Online) 지질공학

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