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(사)한국터널지하공간학회

ISSN : 2233-8292

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Vol.16 No.2
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Manufacturing of an earth pressure balanced shield TBM cutterhead for a subsea discharge tunnel and its field performance analysis

(사)한국터널지하공간학회 / (사)한국터널지하공간학회, (P)2233-8292; (E)2287-4747
2014, v.16 no.2, pp.161-172
https://doi.org/10.9711







& (2014). Manufacturing of an earth pressure balanced shield TBM cutterhead for a subsea discharge tunnel and its field performance analysis. (사)한국터널지하공간학회, 16(2), 161-172, https://doi.org/10.9711
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Abstract

An earth pressure balanced shield TBM with the diameter of 4.4 m was designed and manufactured for a subsea discharge tunnel excavation. Its cutterhead was designed to be optimized for the strongest rock mass condition in the tunnel alignment, and then the applicability of the refurbished shield TBM was validated for its maximum capacity. Especially, the maximum cutter penetration depth for the strongest rock mass condition should be kept to be below 7 mm/rev in order to satisfy the allowable capacities of the shield TBM. From the analysis of TBM advance data, approximately 95% of field data showed the cutter penetration depth below 7 mm/rev. In addition, it was certified that the acting forces of every disc cutter, TBM thrust and torque during TBM driving were within the allowable capacities of the shield TBM and its disc cutters. When real acting forces of the disc cutters in the field were compared with those predicted by the CSM model, they showed the close relationships with each other even though the predictions by the CSM model were approximately 22∼25% higher than field data.

keywords
TBM, 커터헤드, 디스크커터, 커터 작용력, 굴진성능, TBM, Cutterhead, Disc cutter, Cutter acting force, Excavation performance

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