Research Article
Sep 1975
Importance of Groove Spacing in Tunnel Boring Machine Operations
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VIEW THE REPLYAuthor: Parviz F. RadAuthor Affiliations
Publication: Journal of the Geotechnical Engineering Division
Volume 101, Issue 9
Abstract
One of the more important and yet easily modified parameters in the performance of tunnel boring machines is the spacing between two neighboring grooves created by the travel of the cutters. This spacing affects the interaction between the grooves and thus the advance rate and overall efficiency of the tunnel boring machine. Selecting the correct spacing for each specific job requires a thorough understanding of the cutting characteristics of the rock material. Results of cutting experiments with a 7-in. (180-mm) rolling disk cutter in marble, limestone, granite, and quartzite are presented and examined. The values of muck weight per unit length, groove depth, cutting coefficient, and specific energy are taken as indicators of the cutter performance for each test condition. Determination of the optimum and critical groove spacing for field operations can easily be performed with values of any one of the performance indicators based on the interrelation between rock strength indices and cutter performance indicators.
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Published In
Journal of the Geotechnical Engineering Division
Volume 101 • Issue 9 • September 1975
Pages: 949 - 962
Copyright
© 1975 American Society of Civil Engineers.
History
Published in print: Sep 1975
Published online: Feb 10, 2021
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Authors
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Parviz F. Rad
Assoc. Prof. of Civ. Engrg., Dept. of Civ. Engrg., Clemson Univ., Clemson, S.C.
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