Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Experimental Assessment for the Effect of Burial Depth on the Formation of Underground Cavities and Ground Cave-ins by Damaged Sewer Pipes

하수관 손상으로 인한 지하공동 및 지반함몰 발생에 대한 하수관 매립심도 영향의 실험적 평가

  • Kwak, Tae-Young (Seismic Safety Research Center, Korea Institute of Civil Engineering and Building Technology) ;
  • Chung, Choong-Ki (Dept. of Civil & Environmental Engrg., Seoul National Univ.) ;
  • Kim, Joonyoung (Korea Railroad Research Institute) ;
  • Lee, Minho (Korea Rail Network Authority) ;
  • Woo, Sang-Inn (Dept. of Civil and Environmental Engrg., Hannam Univ.)
  • 곽태영 (한국건설기술연구원 지진안전연구센터) ;
  • 정충기 (서울대학교 건설환경공학부) ;
  • 김준영 (한국철도기술연구원) ;
  • 이민호 (한국철도시설공단) ;
  • 우상인 (한남대학교 토목환경공학전공)
  • Received : 2019.09.05
  • Accepted : 2019.10.29
  • Published : 2019.11.30
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Abstract

In order to analyze the effect of burial depth on the generation of ground cavities and cave-ins, a series of model experiments with different height of model ground were performed. Digital images of the model ground were captured to evaluate the internal deformation of the model grounds by adopting the PIV (Particle Image Velocimetry) technique. Additionally, the vertical displacement at the surface, the size of the cavity, and the weight of the discharged soil were measured in each test. The results indicate that the model ground with low burial depth, which does not satisfy the criterion, was more vulnerable to ground cavities and cave-ins than the model ground with high burial depth.

본 연구에서는 매립심도가 손상 하수관으로 인해 형성되는 지하 공동 및 지반함몰에 미치는 영향을 확인하기 위하여 서로 다른 심도로 지반을 조성하여 모형시험을 수행하였다. 모형시험 중에 일정 시간 간격으로 디지털 이미지를 촬영하였으며, PIV 기법을 적용하여 내부 변위 및 변형을 측정하였다. 이와 지표면에서 발생하는 지반 침하, 지하 공동의 크기 등에 대한 분석도 함께 진행하여 거동을 분석하였다. 시험 결과, 매립심도가 낮은 경우의 지반에서 매립심도가 높은 경우에 비해 지하 공동 및 지반함몰 형성에 대한 저항성이 작은 것으로 확인되었다.

Keywords

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