Search Results: 'Robbins'

Cutting it - Disk design
01 October, 2005
Correct selection of TBM cutting elements is obviously of great importance to planned progress. However, the ways in which cutter design can affect tunnelling progress are not always so obvious. Technical journalist Maurice Jones spoke to some leading authorities on the subject

Epping to Chatswood – the final touches
01 September, 2005
Construction of the 12.5km long Epping to Chatswood Rail Line is drawing to a successful close. Jim Rozek, Parsons Brinckerhoff design project director, describes the experience gained during construction of the 23km of large diameter TBM driven tunnel and four wide arch stations

The evolution of the hard rock ABM
01 March, 2005
Auger Boring Machines (ABMs) have been in use for over a century, but performance has improved significantly in the past 30 years. More powerful machines combined with modern pipe-jacking methods, better steel casing pipe, improved materials for augers and tungsten-carbide bits are permitting ABMs to bore longer, larger tunnels. Recently, with the incorporation of rock cutting heads, their use has expanded into hard rock. Joseph A Roby, vice president of The Robbins Company, explores the advent of the hard rock ABM, and the rock-cutting head that makes it possible