Use of the punch test for estimating TBM performance

✍ Scribed by G.L. Dollinger; H.J. Handewith; C.D. Breeds

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 753 KB
• Volume: 13
• Category: Article
• ISSN: 0886-7798
• DOI: 10.1016/s0886-7798(98)00083-2

✦ Synopsis

This paper discusses the history of thepunch test as a laboratory tool for estimating

Raise Boring Maehineand TunnelBoringMachinepenetrationrates. Inclu&darediscussionsofsomeofthemetho& that have been used to evaluate the test results for this purpose and how the test has been used to evaluate certain rock characteristics such as brittleness, bedding or cleavage, andporosity, which have been observed to affect machine performance. Also presented are some examples as to how the test has been used in an expanded form to evaluate the effect of certain machineparameters such as cutter spacing and geometry on excavation rates. Based on this, it is concluded that the punch test has proven itself to be a powerful laboratory tool for evaluating rock boreability and that it has the potential of becoming a stand atone test for this purpose.