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http://dx.doi.org/10.7474/TUS.2019.29.6.394

Analysis of Advanced Rate and Downtime of a Shield TBM Encountering Mixed Ground and Fault Zone: A Case Study  

Jeong, Hoyoung (Department of Energy Systems Engineering, Seoul National University)
Kim, Mincheol (Plant team, Dong-Ah Geological Engineering)
Lee, Minwoo (Plant team, Dong-Ah Geological Engineering)
Jeon, Seokwon (Department of Energy Systems Engineering, Seoul National University)
Publication Information
Tunnel and Underground Space / v.29, no.6, 2019 , pp. 394-406 More about this Journal
Abstract
Difficult ground conditions (e.g., fault zone and mixed grounds) are highly probable to appear in subsea and urban tunnels because of the shallow working depth and alluvial characteristics. TBM usually experienced decrease of penetration rate and increase of downtime when it meets these difficult ground conditions. The problems are usually caused by the adverse geological conditions, and it is preferable to determine the optimal operational parameters of TBM based on the previous operational data obtained while excavating a preceding tunnel. This study carried out for efficient TBM excavation in fault zone and mixed grounds. TBM excavation data from the tunnel site in Singapore and the characteristics of the TBM excavation data was analyzed. The key operational parameters (i.e., thrust, torque, and RPM), penetration rate, and downtime were highly influenced by the presence of fault zones and mixed grounds, and the features was discussed. It is expected that the results and main discussions will be useful information for future tunneling projects in similar geological conditions.
Keywords
Fault zone; Mixed ground; Shield TBM; Penetration rate; Downtime;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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1 An, M.S., 2011, A study of advanced rate under the operating conditions of EPB shield TBM based on TBM operation data, Journal of Korean Civil Engineering, Vol. 31, No. 6, pp. 839-848.
2 Du, W. and Pan T.C., 2016, Site response analyses using downhole arrays at various seismic hazard levels of Singapore, Soil Dynamics and Earthquake Engineering, Vol. 90, pp. 169-182.   DOI
3 Farrokh, E., 2018, Introducing hard rock TBMs' downtime analysis model with reference to past case histories' data, Journal of Mining & Environment, Vol. 9, No. 2, pp. 457-472.
4 Jeong, H.Y., Zhang, N., Jeon, S.W., 2018, Review of technical issues for shield TBM tunneling in difficult grounds, Tunnel and Underground Space, Vol. 28. No. 1, pp. 1-24.   DOI
5 Jung, S.M., Lee, K.H., Park, JH., Lee, IM., 2014, Correlation between the EPB shield TBM machine data and the ground condition, Journal of Korean Tunnelling and Underground Sp Assoc, 16(6), 543-552.   DOI
6 Sousa, R.L. and Einstein, H.H. 2012, Risk analysis during tunnel construction using bayesian netwarks: porto metro case study, Tunnelling and Underground Space Technology, Vol. 27, pp. 86-100.   DOI
7 Yoon, Y.M., Jeong, H.Y., Jeon, S.W., 2018, Review of pre-grouting methods for shield TBM tunneling in difficult grounds, Tunnel and Underground Space, Vol. 28, No. 6, pp. 528-546.   DOI