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  • The optimization of widening techniques by use of a Bouygues rotary tunnelling machine, to ensure good progress in as large a range as possible of different conditions

Abstract

The last site on which the rotary tunnelling machine was used was the widening of an underground link between the sites of Zolder and Beringen. This site, situated on the Beringen side, was of interest on account of the widening of a 120-metre curved section of the radius. This necessitated numerous adaptations to the machine.
The most important adjustment carried out because of this site concerned the hydraulic circuit of the tunnelling machine, which was simplified and reinforced. More pilot circuits were used in order to keep the major flow ducts as short as possible and to reduce the frequency of breakage in these flexible pipes. The widening of the curve was carried out in a very satisfactory manner. An average progress rate of 4 to 5 metres per day was achieved.
The new design equipped with steel hooping has come up to our expectations. It has proved to be more practical than the old design equipped with a traditional metallic frame. For a similar price, it has actually proved to be more malleable and therefore more resistant. .

Additional information

Authors: VAN ESPEN M, ISSeP Liège (BE);FROMONT J, ISSeP Liège (BE);THONNARD D, ISSeP Liège (BE);VESCHKENS M, ISSeP Liège (BE)
Bibliographic Reference: EUR 15653 FR (1997) 573pp., FS, ECU 103.50
Availability: Available from the (2)
ISBN: ISBN 92-827-9221-8
Record Number: 199710216 / Last updated on: 1997-04-01
Category: PUBLICATION
Original language: fr
Available languages: fr