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2014 Vol.16, Issue 6 Preview Page
Correlation between the EPB shield TBM machine data and the ground condition

EPB Shield TBM 기계데이터와 지반상태의 상관관계 분석

Sun-Min Jung1
,
Kang-Hyun Lee2
,
Jeong-Jun Park3
,
In-Mo Lee4*
정 선민1
,
이 강현2
,
박 정준3
,
이 인모4*
1Master, School of Civil, Environmental and Architectural Engineering, Korea University
2Research Professor, School of Civil, Environmental and Architectural Engineering, Korea University
3Ph. D Candidate, School of Civil, Environmental and Architectural Engineering, Korea University
4Professor, School of Civil, Environmental and Architectural Engineering, Korea University
1고려대학교 건축사회환경공학부 석사
2고려대학교 건축사회환경공학부 연구교수
3고려대학교 건축사회환경공학부 박사수료
4고려대학교 건축사회환경공학부 교수
*교신저자. *Corresponding Author. 
30 November 2014. pp. 543-552
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Abstract

This research covers correlation analysis between the machine data measured from EPB Shield TBM construction site and the ground condition during excavation, and figures out how the machine data are affected by the change of ground conditions through single and mixed parameter analysis. It was found that when the ground is changed from hard rock to soft rock, the ratio of the cutter torque to thrust force increases. The relationship between the ratio of the cutter torque to thrust force and the penetration rate shows that the ratio has a certain range of values for hard rock; on the other hand, it increases for soft rock. It means that we can recognize a sign of appearance of weak zone by assessing the ratio of the cutter touque to thrust force according to each penetration rate. Multiple regression analysis of the machine data showed that the cutter torque increases with the increases of the total thrust force, and it decreases with the increase of the uniaxial compressive strength of the ground.

Keywords
EPB Shield TBM
Ground condition
Machine data analysis
Multiple regression analysis

본 연구에서는 EPB 쉴드 TBM 시공현장에서 얻은 기계데이터와 굴진당시의 지반상태와의 상관관계를 분석하여, 지반상태의 변화에 따른 기계데이터의 변화를 단일 및 복합변수분석을 통하여 규명하였다. 그 결과 경암지반에서 연암지반으로 지반이 변화할 때, 총추력과 커터토크의 비가 증가하는 것을 확인할 수 있다. 총추력대비 커터토크의 비율(커터토크/총추력)을 굴착속도와 쌍대비교하면 경암지반에서의 데이터는 일정한 범위 내에 있음을 확인 할 수 있으며, 연암지반에서는 경암지반일 때와 비교하면 추력대비 커터토크의 비율이 높은 값을 가진다. 이러한 결과를 바탕으로 총추력대비 커터토크의 비율과 굴착속도의 비교를 통해서 연약대 출현의 징후를 감지할 수 있다. 이와 같은 분석결과는 목적변수 커터토크가 설명변수 총추력이 증가할수록, 또 다른 설명변수 지반일축압축강도가 감소할수록 증가한다는 중회귀분석의 결과를 통해서도 증명된다.

키워드
EPB 쉴드 TBM
지반조건
기계데이터 분석
중회귀분석
References
1
1.An, M.S., Lim, K.S., Kim, K.J. (2011), “A study on advance rate under the operating conditions of EPB shield TBM based on TBM operation data”, Korean Society of Civil Engineers (KSCE), Vol. 31, No. 6, pp. 839-848.
2
2.No, H.J. (2008), “Management science by microsoft excel 2007”, Hanol publishing company, pp. 45-69.
3
3.Sousa, R.L., Einstein, H.H. (2012), “Risk analysis during tunnel construction using bayesian netwarks: porto metro case study”, Tunnelling and Underground Space Technology (TUST) ,Vol. 27, pp. 86-100.
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 :6
  • Pages :543-552
  • Received Date : 2014-10-21
  • Revised Date : 2014-10-31
  • Accepted Date : 2014-11-03
  • DOI :https://doi.org/10.9711/KTAJ.2014.16.6.543
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