A Study on the D-InSAR Method for Micro-deformation Monitoring in Railway Facilities

Byung-Kyu Kim; Changgil Lee; Winter Kim; Mintaek Yoo; Ilhwa Lee

doi:10.7843/kgs.2022.38.11.43

All Issue

2022 Vol.38, Issue 11 Preview Page Next Page

A Study on the D-InSAR Method for Micro-deformation Monitoring in Railway Facilities 철도시설물 미소변형 모니터링을 위한 D-InSAR 기법 연구

30 November 2022. pp. 43-54

PDF XML

Abstract

The settlement at the railroad foundation is often the leading cause of track irregularity and potential derailment. The control of such deformation is considered necessary in track maintenance practice. Nevertheless, the monitoring process performed by in situ surveying requires an excessive amount of manpower and cost. The InSAR, a remote sensing technique by RADAR satellite, is used to overcome such a burden. The PS-InSAR technique is preferred for a long-term precise monitoring method. However, this study aims to obtain relatively brief analysis results from only two satellite images using the D-InSAR technique, while a minimum of 25 images are required for PS-InSAR. This study verifies the precision of D-InSAR within a few millimeters by inspecting railroad facilities and land settlements in Korea Railroad Research Institute’s test track with images from TerraSAR-X Satellite. Multiple corner reflectors were adopted and installed on an embankment and the building roof to raise the surface reflectivity. Those reflectors were slightly adjusted periodically to verify the detecting performance. The results revealed the optimum distance between corner reflectors. Further, the deformation of railway tracks, slopes, and concrete structures was analyzed successively. In conclusion, this study indicates that the D-InSAR technique effectively monitors the short-term deformation of a broad area such as railway structures.

Keywords

Corner reflector

D-InSAR

InSAR

Railway

Remote sensing

철도 시설물에서는 침하 및 틀림에 의해 사고가 발생할 수 있어 변형을 적정수준으로 유지하는 것이 중요하다. 변형을 모니터링하기 위해서는 과도한 인력과 시간이 필요하기 때문에 이를 개선하기 위해 위성원격탐사 기술 중 하나인 InSAR 기술을 활용하고자 한다. 장기적인 시계열 분석을 위해서는 25장 이상의 고해상도 위성정보로 PS-InSAR 기법을 활용 할 수 있으나, 신속하고 단기적인 방법으로 2장 이상의 위성정보로 D-InSAR 기법으로 미세 변형을 관측할 수 있다. 본 연구에서는 TerraSAR-X 영상을 이용하여 D-InSAR 기법을 적용하여 오송 철도종합시험선로의 지반 침하량 및 구조물 변형량을 구하였다. 구조물과 사면에 반사강도를 높일 수 있는 코너리플렉터를 인공적으로 설치하여 변위 값을 임의로 수 mm 조정하여 이를 검증 할 수 있도록 하였다. D-InSAR 분석 결과로부터 적절한 코너리플렉터 배치도를 산출하였고, 궤도, 사면, 구조물 구역의 변위량을 측정하였다. 더불어 임의로 조정한 코너리플렉터의 변위값을 D-InSAR 분석으로 산출하였다. 본 연구 결과로부터 D-InSAR 결과를 철도시설물과 같은 광범위한 인프라 시설에 모니터링을 위한 기법으로 활용 가능함을 확인하였다.

References

Chang, L., Dollevoet, R. P. B. J., and Hanssen, R. F. (2017), "Nationwide Railway Monitoring Using Satellite SAR Interferometry", IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol.10, No.2, pp.596-604. 10.1109/JSTARS.2016.2584783

Chen, B., Gong, H., Chen, Y., Lei, K., Zhou, C., Si, Y., Li, X., Pan, Y., and Gao, M. (2021), "Investigating Land Subsidence and its Causes along Beijing High-speed Railway Using Multi-platform InSAR and a Maximum Entropy Model", In International Journal of Applied Earth Observations and Geoinformation, Vol.96, April 2021. 10.1016/j.jag.2020.102284

Choi, E.K., Kim, S.W., Cho, J.W., and Lee, J.H. (2017), "GIS-based Subsidence Hazard Map in Urban Area", Journal of the Korean Geotechnical Society, Vol.33, No.10, pp.5-14.

Hu, F., Van Leijen, F. J., Chang, L., Wu, J., and Hanssen, R. F. (2019), "Monitoring Deformation along Railway Systems Combining Multi-Temporal InSAR and LiDAR Data", Remote Sensing, Vol.11, No.19. 10.3390/rs11192298

Jung, J., Kim, D., Vadivel, S. K. P., and Yun, S.H. (2019), "Long-term Deflection Monitoring for Bridges using X and C-band Time-series SAR Interferometry", Remote Sensing, Vol.11, No.11. 10.3390/rs11111258

Kim, H.B., Hong, H.S., Youm, M.K., and Lee, W.E. (2017), "Land Subsidence Analysis for the High-speed Railway Line of Honam using D-InSAR Technique", Journal of the Korean Society for Geospatial Information Science, Vol.25, No.3, pp.35-41. 10.7319/kogsis.2017.25.3.035

Kim, Y.H., Eum, K.Y., Han, S.J., Park, Y.G., and Jung, J.H. (2015), "A Study on Settlement Characteristics of Earthwork Subgrade with Lowering the Groundwater in High-speed Railway", Journal of the Korean Geotechnical society, Vol.31, No.5, pp.67-74 10.7843/kgs.2015.31.5.67

Kim, Y.H., Jeong, S.S., Seol, H.I., and Han, Y.A. (2008), "Analysis of Allowable Settlement on Tracks of High Speed Railway", Journal of the Korean Geotechnical society, Vol.24, No.11, pp.25-34

Milillo, P., Giardina, G., Perissin, D., Milillo, G., Coletta, A., and Terranova, C. (2019), "Pre-Collapse Space Geodetic Observations of Critical Infrastructure: The Morandi Bridge, Genoa, Italy", Remote Sensing, Vol.11, No.12. 10.3390/rs11121403

Nahar, S. S. and Mahmud, A. (2015), "InSAR Observation for the Suface Displacements at Mt. Etna between 2003 and 2007", International Journal of Geosciences, International Journal of Geosciences, Vol.6, No.2, pp.159-171. 10.4236/ijg.2015.62010

Selvakumaran, S., Plank, S., Geiß, C., Rossi, C., and Middleton, C. (2018), "Remote Monitoring to Predict Bridge Scour Failure using Interferometric Synthetic Aperture Radar (InSAR) Stacking Techniques", International Journal of Applied Earth Observation and Geoinformation, Vol.73, pp.463-470. 10.1016/j.jag.2018.07.004

Youm, M., Timothy, T.M., Lee, S., and Kim, H. (2019), "Displacement Measuring of Coastal Area using PS-InSAR", Journal of Coastal Research, Vol.91, No.1, pp.291-295. 10.2112/SI91-059.1

Information

Publisher :The Korean Geotechnical Society
Publisher(Ko) :한국지반공학회
Journal Title :Journal of the Korean Geotechnical Society
Journal Title(Ko) :한국지반공학회 논문집
Volume : 38
No :11
Pages :43-54
Received Date : 2022-10-06
Revised Date : 2022-10-13
Accepted Date : 2022-10-13
DOI :https://doi.org/10.7843/kgs.2022.38.11.43

Journal of the Korean Geotechnical Society ISSN:1229-2427(Print) 2288-646X(Online) 한국지반공학회 논문집

All Issue