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Membranes act structurally

The use of new generation sprayed membranes in sprayed concrete linings can have surprising structural benefits, argues Mike Harper

Quick job in Quebec

Clair H Murdock and Ron W Glowe discuss the excavation of the Rupert Transfer Tunnel at James Bay, Québec, Canada, finished well ahead of schedule using top heading and bench excavation

Tunnelling through Flysch: some practical experience

V Vesely and O Jandejsek of Arcadis Geotechnika outline their experience of the geotechnical risks encountered in the project phases of survey, data evaluation, design and construction

Playing a defining role

Rick Staples, president of the Tunnelling Association of Canada, has played a defining part in organising the successful World Tunnel Congress in Vancouver last May. Here he reveals more about his career and other topical tunnel themes.

Gotthard closing, Ceneri advancing

The Gotthard and Ceneri Base tunnels in Switzerland will create a 'flat' route through the Alps. Dr Renzo Simoni, CEO of Alp Transit Gotthard, reports

Workloads looking mostly healthy

George Demetri asks tunnel consultancies about workload, the economic downturn, recruitment and growth

Safer subterranean Singapore

LJ Pakianathan (Mott MacDonald Singapore), S McChesney (Land Transport Authority) and M Mannot-Russell (CH2M) report on recent safety legislation in Singapore

Fibre-rich tunnel

Benoit de Rivaz reports on the steel-fibre technology used in a high-stress access tunnel on a major rail line

The rail revival

The resurgence of the long-tunnel market is bringing new life to the rail-mounted equipment sector. John Hooper of GIA explains

Better, not bigger, is better

Randall J Essex is executive vice-president and director of tunnelling at Hatch Mott MacDonald in Maryland, US. He talked to George Demetri about his career, recruitment and the thorny issue of risk

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  • Features

    Playing a defining role
    Tunnelling through Flysch: some practical experience
    Quick job in Quebec
    Membranes act structurally