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2016 Vol.32, Issue 12
A Study on the Excavation Damage Zone (EDZ) under TBM Advancement Based on Large Deformation Technique (Coupled Eulerian-Lagrangian)

대변형 해석기법(Coupled Eulerian-Lagrangian Technique)을 이용한 TBM 굴착손상영역 분석

Seung-Yeon Lee1
,
Do-Hyun Kim2
,
Sang-Seom Jeong3*
이 승연1
,
김 도현2
,
정 삼섬3*
1Member, Assistant Manager, Korea Railroad Research Institute
2Member, Graduate Student, Dept. of Civil and Environmental Engrg., Yonsei Univ.
3Member, Prof., Dept. of Civil and Environmental Engrg., Yonsei Univ.
1한국철도기술연구원 주임연구원
2연세대학교 토목환경공학과 박사과정
3연세대학교 토목환경공학과 교수
*교신저자. *Corresponding Author. 
31 December 2016. pp. 5-13
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Abstract

In this study, Coupled Eulerian-Lagrangian (CEL) analysis, which is one of the large deformation analyses, was incorporated to investigate excavation damage zone (EDZ) under TBM advancement. Considering the quasi-static condition, the dynamic analysis was performed to simulate the real TBM advancement and subsequently a case study on mesh and TBM excavation rate was carried out for satisfying a balance of accuracy and economic computational time. Based on this, a series of parametric studies were performed for different rock types and tunnel diameters. From the numerical analysis results, it is found that EDZ was taken to range within 0.4D(D=tunnel diameter) for most rocks. It is also found that the EDZ tends to increase as the tunnel diameter increases.

Keywords
Coupled Eulerian-Lagrangian technique
Large deformation FE analysis
TBM excavation
Excavation Damage Zone

본 연구에서는 대변형 해석기법 중 하나인 Coupled Eulerian-Lagrangian 해석기법을 적용하여 TBM 굴진으로 발생하는 굴착손상영역을 분석하였다. 실제 TBM 굴진과정을 모사하기 위해 quasi-static 조건을 고려하여 동적해석을 수행하였으며, 해석시간의 효율성과 정확도를 만족시키는 최적의 조건을 찾기 위해 mesh 및 TBM 굴진속도를 변수로 하여 case study를 수행하였다. 또한 암반 종류 및 터널 직경이 굴착손상영역에 미치는 영향을 확인하기 위해서 매개변수연구를 수행하였다. 수치해석 결과, TBM 굴착으로 인한 굴착손상영역은 대부분의 경우 0.4D 이내로 나타났으며, 터널직경이 커짐에 따라 굴착손상영역도 증가하는 것으로 나타났다.

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Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 32
  • No :12
  • Pages :5-13
  • Received Date : 2016-03-24
  • Revised Date : 2016-10-11
  • Accepted Date : 2016-12-25
  • DOI :https://doi.org/10.7843/kgs.2016.32.12.5
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