Journal of the Korean Geosynthetics Society (한국지반신소재학회논문집)

Korean Geosynthetics Society (한국지반신소재학회)
권호 표지
DOI QR코드

DOI QR Code

Analysis of Sewer Pipe Defect and Ground Subsidence Risk by Using CCTV and GPR Monitering Results

CCTV 및 GPR을 이용한 하수관로 결함 및 지반함몰 위험성 평가

  • Lee, Dae-Young (Geotechnical Engineering Research Division, Korea Institue of Civil Engineering and Building Technology)
  • Received : 2018.05.14
  • Accepted : 2018.09.21
  • Published : 2018.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

Recently, increasing number of urban ground subsidence occurrences has been identified. This situation is mainly due to the increased number of underground cavities. This study is intended to develop the method that prevents ground settlement caused by deteriorated or damaged sewers, which are the main cause of land subsidence. To that end, GPR exploration was conducted using CCTV monitoring of deteriorated sewer at the location with high settlement potential. Through such CCTV monitoring and GPR investigation, abnormal ground behavior was monitored at the site where sewer was damaged, joint was cracked and soil was deposited. According to site investigation in this study, evaluation method using correlation analysis of CCTV monitoring and GPR investigation results is expected to prevent ground settlement attributable to damaged sewer.

도심지 지반함몰 현상은 최근 5년간 그 빈도수가 급속히 증가하고 있다. 지하공동의 발달은 지표 침하를 발생시키고 그로 인한 포장재의 취성파괴를 유발시킨다. 본 연구는 도심지 지반함몰의 주원인인 노후화된 하수관로 손상에 의한 지반침하를 예방하기 위한 평가기법 개발 기초연구 이다. 이를 위해 본 연구에서는 노후하수관로 하수관로 CCTV 조사를 통해 지반침하 발생 위험구간에 대해서 GPR 조사를 수행하였다. 하수관로 CCTV 조사와 GPR조사 결과를 통해 노후하수관로의 파손, 이음부 이탈, 토사퇴적 부위에서 지반 이상신호를 확인 할 수 있었다. GPR 조사를 통해 노후하수관로 주변 지반의 공동발생 가능성과 지반이완상태를 평가하였다. 본 연구결과를 통해 CCTV와 GPR 데이터의 결과를 이용한 상관관계 평가방법을 이용하면 하수관로 손상으로 인한 지반침하를 예방할 수 있을 것으로 판단된다.

Keywords

References

  1. Anan (1992). "Electromagnetic principles of ground penetrating radar", ELSEVIER, pp.30.
  2. Kuwano, K. Mari, S., and Ryoko, S. (2010), "Study on the detection of underground cavity and ground loosening for the prevention of ground cave-in accident", Journal of Japan Geotechnical Society, Vol.5, No.2, pp.219-229.
  3. Kim, J. Y., Lee, S. J., Oh, J. I., and Lee, D. Y. (2015), "Correlation analysis of land subsidence with sewer defect" 2015 Korea Society and Wastewater Conference, pp.643-644.
  4. Kim, Y. H., Kim, J. B., Kim, D. W., and Han, J. G. (2017). "Experimental study on generating mechanism of the ground subsidence of due to damaged waters supply pipe", Journal of Korean Geosynthetics Society, Vol.16, No.2, pp.139-148.
  5. Lee, D. Y., Choi, Y. W., and Choi, H. (2015). "Cavity detection under road structure for cause survey of road cave-in", KSCE 2015 convention conference, pp.217-218.
  6. Lee, K. C., Choi, B. H., Park, J. H., and Kim, D. W. (2018). "Numerical analysis and laboratory experiment of rapid restoration of underground cavity using expansive material without excavation", Journal of Korean Geosynthetics Society, Vol.17, No.1, pp.55-64. https://doi.org/10.12814/JKGSS.2018.17.1.055
  7. Ministry of Environment (2015), Standard manual of sewer CCTV inspection and renovation criteria, Ministry of Environment, ROK.
  8. Ministry of Environment (2010), Standardization of sewage pipe CCTV survey, Final report, pp.4-5.
  9. Seoul sity (2014). Cause analysis of cavity at Seokchon underground roadway and road cavity special management measures, Seoul Seokchon-dong Cavity Cause Investigation Committee.
  10. Seoul sity (2017), 2016 White paper on road management technology, pp.25-27.
  11. Water Environment Federation (2009). Existing sewer evaluation & rehabilitation : WEF Manual of Practice FD-6 & ASCE Manual and Report on Engineering Practice No. 62.

Cited by

  1. Faster R-CNN을 활용한 GPR 영상에서의 지하배관 위치추적 성능분석 vol.9, pp.5, 2019, https://doi.org/10.22156/cs4smb.2019.9.5.021
  2. 지표투과레이더(GPR)에 의한 도로포장의 전자기적 특성값 고찰 vol.40, pp.3, 2018, https://doi.org/10.12652/ksce.2020.40.3.0285
  3. Automatic Detection System of Underground Pipe Using 3D GPR Exploration Data and Deep Convolutional Neural Networks vol.26, pp.2, 2018, https://doi.org/10.9708/jksci.2021.26.02.027