Search Results: 'Costain'
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Prepared for the long haul
18 October, 2011
Since precast concrete segmental tunnel lining was invented, there has never been so much development of the ‘product’ as in recent years, even though, superficially, it may look the same. Maurice Jones looks at some of these developments aimed at increasing tunnelling progress whilst avoiding mishaps
Crossrail Royal Oak portal early completion
28 September, 2011
Mitigation and alternatives: making hand mining better
26 September, 2011
A current trend in tunnelling, as in many other industries, is against manual labour, but in many situations hand mining seems the logical first choice until one considers the hazards involved that are arguably greater then those associated with large-section tunnelling. Maurice Jones checks on the current status of the activity, mitigation to improve hand mining, and the alternatives offered by some equipment manufacturers.
Hard treatment for unforgiving chalk drive
13 April, 2011
Climbing down the steep cliff-side steps, past the flint layers, of which there are many, each indicating some great, apocalyptic extinction event, it becomes clear just how deeply and how steeply the pipe must descend. Alex Conacher explores the Joseph Gallagher worksite near Brighton, one of the most ambitious jacking projects ever undertaken in Britain
Skanska chosen to build deep cable tunnels
05 January, 2011