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

Dae-Young Lee

doi:10.12814/jkgss.2018.17.3.047

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2018 Vol.17, Issue 3 Preview Page

Research Article

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

30 September 2018. pp. 47-55

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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.

Keywords

Sewer pipe

Ground subsidence

Underground cavity

GPR

CCTV

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.

References

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Information

Publisher :Korean Geosythetics Society
Publisher(Ko) :한국지반신소재학회
Journal Title :Journal of the Korean Geosynthetics Society
Journal Title(Ko) :한국지반신소재학회 논문집
Volume : 17
No :3
Pages :47-55
Received Date : 2018-05-14
Revised Date : 2018-09-10
Accepted Date : 2018-09-21
DOI :https://doi.org/10.12814/jkgss.2018.17.3.047

Journal of the Korean Geosynthetics Society ISSN:2508-2876(Print) 2287-9528(Online) 한국지반신소재학회 논문집

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