Search Results: 'CTRL'

Performance of fibres for concrete
01 September, 2003
John Greenhalgh, technical sales representative for Bekaert Building Products UK, describes various types of fibre reinforcement available for underground construction and how the various characteristics of these fibres affect concrete performance

Strengthening the case
01 September, 2003

London boom sets the scene for UC'03
01 September, 2003
Underground Construction 2003 is due to be held on the 24-25 September at the ExCeL conference and exhibition centre in London's docklands. At a time when tunnelling activity in London is at its peak, this year's event is set to outstrip the success of its predecessors

Lining & Support Products
01 August, 2003
The latest lining and support products

Excavation Products - continued
01 August, 2003
The latest excavation products - continued

Excavation Products
01 August, 2003
The latest excavation products

Soil conditioning for sands
01 July, 2003
Although the use of foams, polymers and bentonites is widespread in tunnelling, little guidance exists as regards their application. Miguel Peña from Oxford University, summarises the research, undertaken at the university, into soil conditioning for EPB machines in sand

Easing the way - soil conditioning
01 June, 2003
On 20thMarch the British Tunnelling Society heard brief results of research on soil conditioning and lubrication for tunnelling and pipe jacking applications. These research programmes, at Oxford and Cambridge Universities, are directed by Professor Guy Houlsby and Professor Robert Mair respectively. Xavier Borghi and Andrew Merritt from Cambridge and Miguel Peña from Oxford presented summaries of their work

Tunnelling Industry Awards 2003
01 June, 2003

Tunnelling effects on piled foundations
01 June, 2003
BTS Harding Prize finalist, SW Jacobsz of Rail Link Engineering, describes his investigations into tunnelling effects on piled foundations in dense dry sand. Changes in the load distributions on piles with increasing volume loss are presented, as well as recommendations for the estimation of tunnelling-induced pile settlements in sand

Fee bidding prevents 'strength in depth'
01 May, 2003

Breakthrough technology on CTRL
01 April, 2003
Last month, CTRL's 'C320 - Thames Tunnels' TBM broke through into the Thurrock reception chamber, on the north side of the River Thames in the UK, using a new technique involving the use of glass-fibre bars (GFRP) instead of steel reinforcement for construction of the diaphragm headwalls. Jürgen Mielenz, temporary works manager for the contractor, the Hochtief/Murphy JV, describes the methods employed

Soil conditioning for Clay Soils
01 April, 2003
Two of the UK's premier universities, Oxford and Cambridge, are collaborating on a major tunnelling research programme into the effective use of soil conditioning and lubricating agents. Robert Mair, Andrew Merritt and Xavier Borghi of Cambridge University's Engineering Department, and Hiroshi Yamazaki and Toshifumi Minami of Nishimatsu Construction Co. Ltd, describe the research underway

Complex redesign for London link
01 April, 2003
A packed audience at the BTS meeting this February, saw a most interesting presentation on the tunnelling work currently in hand at King's Cross St Pancras Station, London, UK. The presenters were Mike Crabtree of London Underground Ltd, Roger Cox of Infraco SSL (Sub-Surface Ltd), Chris Dulake of Arup and Colin Eddie of Morgan Tunnelling

North Downs Tunnel technical overview
01 March, 2003
Value engineering on the North Downs Tunnel, a 3.2km long high-speed rail tunnel on Section 1 of the UK's Channel Tunnel Rail Link, allowed estimated savings of US$14M and contributed towards completion five months ahead of schedule. Here, Colin Warren (Halcrow), lead engineering geologist for Rail Link Engineering, describes the technical innovation, value engineering and integrated observational approach adopted throughout construction