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Chapter 15: Gravity Mapping and Seismic Imaging of Paleochannels on Large Tunnel Routes in Sydney, Australia

Robert J. Whiteley
Robert J. Whiteley
Coffey Geosciences Pty. Ltd., 142 Wicks Road North Ryde, New South Wales 2113, Australia
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January 01, 2005


Governments and municipal authorities, faced with the problems of providing infrastructure within and between densely populated megacities, are increasingly recognizing the importance of tunnels for installation of underground transport corridors, sewerage systems and utilities. Many tunnels are now completed with advanced mechanical tunnel boring machines (TBMs) that are displacing the older drill and blast methods. TBMs can excavate a full circular face to the diameter of the machine, typically from 2 to 12 m, at astonishingly rapid rates when rock mass conditions are excellent. Even so, and despite dramatic improvements in TBM technology (Biggart, 1999), TBMs are still not good at coping with rapidly changing or poor geologic conditions that can slow or stop the machines, increasing risks and costs to the tunnel project (Mitani, 1998).

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Investigations in Geophysics

Near-Surface Geophysics

Dwain K. Butler
Dwain K. Butler
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Society of Exploration Geophysicists
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Publication date:
January 01, 2005




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