Effect of machine factors of tunnel boring machines on penetration rates in rocks

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Prediction of penetration rate of tunnel boring machine (TBM) is important in tunneling design; however, the effect of machine specifications of the TBM on penetration rate remains poorly identified. This study defined a representative machine factor (MF) composed of thrust force, number of cutters, and TBM diameter, and its correlations with penetration rates, using the previously reported field data. In addition, the correlations between the machine factors and the unconfined compressive strength (UCS) of rocks were examined. The stronger relationship between penetration depth and MF than between penetration rate and MF was found. Finally, the generalized prediction-model to penetration depth per revolution was suggested. The presented findings provide insights into the roles of machine factors in TBM performance.
Publisher
CRC Press/Balkema
Issue Date
2019-05
Language
English
Citation

World Tunnel Congress, WTC 2019 and the 45th General Assembly of the International Tunnelling and Underground Space Association, ITA-AITES 2019, pp.2437 - 2445

DOI
10.1201/9780429424441-258
URI
http://hdl.handle.net/10203/269926
Appears in Collection
CE-Conference Papers(학술회의논문)
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