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A Study on Key Factors of Ground Settlement Due to Shield TBM Excavation using Numerical Analysis and Field Measurement Comparison

수치해석과 현장 계측값 비교를 통한 Shield TBM 지표침하 영향요소 검토

Gychan Jun1*
,
Donghyun Kim2
전 기찬1*
,
김 동현2
1Senior Managing Director, KOREA Engineering & Construction Co., Ltd., Research Institute Dept.
2Vice President, KOREA Engineering & Construction Co., Ltd., Research Institute Dept.
*교신저자. *Corresponding Author. 
30 March 2017. pp. 63-72
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Abstract

This study estimates the degree of influence of factors influencing ground surface settlement during tunnel excavation using Shield tunneling trough 3D FE-analyses. Numerical analysis was carried out by considering face pressure, skinplate pressure, excavation length, soil model, element size and soil material properties. Also, Actually constructed shield TBM comparative analysis was conducted by compared with Volume loss model, Pressure model and field measurement data. Skinplate pressure and soil model were the most influential factors, and the analysis results were similar to field measurements when the appropriate skinplate pressure was applied according to the passing stratum.

Keywords
Shield-TBM
3-dimension numerical analysis
Surface settlement
Field measurement data
Ground settlement

본 연구는 Shield TBM공법을 이용한 터널 굴착시 지표침하에 영향을 주는 요소들에 대한 영향정도를 3차원 수치해석을 통해 검토하였다. 막장압, Skinplate 주면압, 굴진장, 지반모델, 요소망 크기, 통과지반에 대한 다양한 조건을 변화시켜가며 수치해석을 수행하였다. 또한 실제 시공된 Shield TBM을 변위제어방법과 응력제어방법으로 모델링하여 현장 계측값과 비교 분석하였다. Skinplate 주면압과 지반모델이 가장 큰 영향요소이며, 통과지층에 따라 적절한 Skinplate 주면압을 입력시 현장 계측값과 유사한 결과를 얻을 수 있었다.

References
1
Chnag, S.B. (2015), A Study of Shield TBM Tunnelling-induced Volume Loss Estimation Considering Shield Machine Configurations and Driving Data, TUNNEL & UNDERGROUND SPACE Vol.25, No.5.
2
Cho, J.S. (2008), Analysis of ground movements and lining segment in shield TBM based on three dimensional finite element method, Pukyong National University.
3
FHWA, 2009, Road Tunnel Manual (FHWA-NHI-09-010)
4
Jun, G.C., Kim, D.H. (2016), A Intercomparison on the estimating shield TBM tunnel face pressure through analytical and numerical analysis, J of Korean Tunn Undergr Sp Assoc, Vol.18 No.3.
5
Jun, G.C., Kim, D.H. (2015), A study on key factors of ground surface settlement due to shield TBM.
6
LIM KEN CHAI (2003), Three-dimensional finite element analysis of earth pressure balance tunnelling, National university of singapore.
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Park, H.K., Chang, S.B., and Lee, S.B. (2015), A Study of Shield TBM Tunnelling-induced Volume Loss Estimation Considering Shield Machine Configurations and Driving Data, Samsung C&T Corp. excavation using 3-dimension numerical analysis, J of Korean Tunn Undergr Sp Assoc, Vol.17 No.3
8
SVEN CHRISTIAN MÖLLER. (2006), Tunnel induced settlements and structural forces in linings, Eigenverlag des Instituts für Geotechnik.
Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 16
  • No :1
  • Pages :63-72
  • Received Date : 2017-03-10
  • Revised Date : 2017-03-22
  • Accepted Date : 2017-03-24
  • DOI :https://doi.org/10.12814/jkgss.2017.16.1.063
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