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2014 Vol.16, Issue 5 Preview Page
Application of x-MR control chart on monitoring displacement for prediction of abnormal ground behaviour in tunnelling

터널 시공 중 이상 거동 예측을 위한 계측 변위의 x-MR 관리도 활용

Hyun-Seok Yun1
,
Gyu-Jin Song2
,
Young-Wan Shin3
,
Chang-Yong Kim4
,
Seok-Yeon Choo5
,
Yong-Seok Seo6*
윤 현석1
,
송 규진2
,
신 영완3
,
김 창용4
,
추 석연5
,
서 용석6*
1Chungbuk National University, Dept. of Earth and Environmental Sciences, Ph. D Student
2Chungbuk National University, Dept. of Earth and Environmental Sciences, Graduate Student
3Hakyong Engineering, President
4Geotechnical Engineering Research Division, Korea Institute of Construction Technology, Research Fellow
5Danwoo E&C, President
6Chungbuk National University, Dept. of Earth and Environmental Sciences, Professor
1충북대학교 지구환경과학과 박사과정
2충북대학교 지구환경과학과 석사과정
3하경엔지니어링 사장
4한국건설기술연구원 Geo-인프라연구실 연구위원
5 ㈜단우기술단 대표이사
6충북대학교 지구환경과학과 교수
*교신저자. *Corresponding Author. 
30 September 2014. pp. 445-458
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Abstract

The displacement data monitored during tunnel construction play a crucial role in predicting the behaviour of ground around and ahead of excavation face. However, the management criteria for monitoring data are not well established especially for the reliable analysis on varying aspect of displacement data along with chainage. In this study, we evaluated the applicability of x-MR control chart method, which is kind of applied statistical management method, for the analysis of displacement monitoring data in terms of prediction of possible collapse or induced cracks. As a result, a possible abnormal behaviour could be predicted beforehand at 5 ~ 13 m ahead or on at least one day before it occurred by using x-MR control chart method. In addition, it is noted that the moving range for the x-MR control chart should be set to 5～10 for this purpose.

Keywords
Measurment
Control criteria
Abnormal behavior
x-MR control chart
Control limit
Displacement

터널 시공 중 측정된 계측 데이터는 굴진면 전방에 분포하는 지반과 터널 거동을 예측하는데 있어 중요한 요소이다. 그러나 현장에서 측정된 계측 데이터의 변동성을 객관적으로 분석할 수 있는 관리 기준이 명확하게 설정되어 있지 않다. 본 연구에서는 응용 통계 관리기법의 일종인 x-MR 관리도기법을 이용하여 시공 중 붕괴 또는 구조물 균열 등을 발생시키는 현장의 계측 데이터를 분석하고 분석기법의 적용성을 검토하였다. x-MR 관리도를 통해 관리 한계선을 설정하여 분석한 결과, 붕괴 발생 전 약 5~13 m 이전에 이상 거동에 대한 예측이 가능하였으며, 시간에 따른 변위의 분석 결과, 최소 1일 전에 예측이 가능하였다. 또한, x-MR 관리도 작성시 이동 범위(k)는 5~10으로 설정하는 것이 이상 거동 예측에 적절한 것으로 판단된다.

키워드
계측
관리 기준
이상 거동
x-MR 관리도
관리한계선
변위
References
1
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2
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Information
  • Publisher :Korean Tunneling and Underground Space Association
  • Publisher(Ko) :한국터널지하공간학회
  • Journal Title :Journal of Korean Tunnelling and Underground Space Association
  • Journal Title(Ko) :한국터널지하공간학회 논문집
  • Volume : 16
  • No :5
  • Pages :445-458
  • Received Date : 2014-08-22
  • Revised Date : 2014-09-12
  • Accepted Date : 2014-09-15
  • DOI :https://doi.org/10.9711/KTAJ.2014.16.5.445
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