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Funding roadshow
04 December, 2003
Experience on Porto – EPB follow-up
01 December, 2003
Following three major collapses during the construction of Line C of the Porto Light Metro, Portugal, a new integrated approach was adopted for both the design and construction phases. F Gaj, V Guglielmetti and P Grasso of Geodata, Italy, and G Giacomin of Transmetro, Portugal, re-live the innovative experience of "Plan for Advance of TBM (PAT)"
Risk and reward
01 December, 2003
TBM recovery after shaft seal failures
01 December, 2003
Polyurethane resins can be strategically applied in the recovery of inundations, flooded shafts and similar disastrous situations below ground. In this article, Peter Town, managing director of Oxford Hydrotechnics, discusses two different shaft seal failure case histories and explores the methodology adopted in each situation
Living the ambition - London's Crossrail
01 December, 2003
In November 2003 a presentation by Keith Berryman, Gordon Torp-Petersen, Mark Leggett and Simon Blanchflower of Cross London Rail Links, was given to members of the British Tunnelling Society regarding the ongoing development of London's Crossrail project
Risk management – a practical view
01 December, 2003
David Lane, director of UK firm, ESTFELD Consulting, discusses the key issues of risk management and suggests some simple ways of improving everyday management of risk without going to large expense
Is there a future in plastics?
01 December, 2003
Contract suitability – unit or fixed price
01 December, 2003
Subsea tunnelling offers significant risk, testing both the suitability of the contract and the co-operation of parties involved. In a continuation of their article in the June edition of T&TI, Olav T Blindheim and Eivind Grøv discuss experiences gained on three Norwegian subsea tunnels
Design development on East Side Access
01 December, 2003
In his Harding Prize finalist paper, David Smith, senior structural engineer for Parsons Brinckerhoff, discusses the construction of Long Island Rail Road's East Side Access Project in New York. In particular, he examines how the designs of tunnels and approach structures have been developed to improve functionality and minimise risk
NATM challenges at Linz Central Station
01 December, 2003
Manfred Eder, managing director, and Johannes Lackner, project manager, of IL - Laabmayr & Partner Consulting Engineers, a member of the consulting JV responsible for NATM-tunnel design and site supervision for the new Linz Commuter Traffic Hub in Austria, discuss the design and construction challenges that have been faced on the NATM tunnel sections of the project
Dealing with the unexpected
07 November, 2003
Filling the gap in packing requirements
01 October, 2003
Alex Lowson, Hatch Mott MacDonald's deputy engineering manager on the Arrowhead Tunnels Project in Southern California, describes his simple 'manual free' computer program that quickly and accurately determines tunnel segment packing requirements
The evil staircase – Kakia Skala
01 October, 2003
Karstic voids, fractures, limited access and steep slopes have posed serious construction challenges on an 8km set of tunnels for a new railway line and the new Athens-Corinth motorway. Technical journalist, Adrian Greeman, recently visited the project
Bringing flood relief to Haifa's roads
01 October, 2003
The Haifa Box Jack in Israel was designed to ease flooding in a large residential and industrial area of Haifa. In this Harding Prize finalist paper Rania Gideon of Haswell Consulting Engineers describes her participation in the project
Learning from the Lærdal Tunnel
01 October, 2003
The longest road tunnel in the world, the 24.5km Lærdal tunnel in Norway, provided unique design developments for ventilation and driver safety. Tunnelling under high rock stresses offered significant challenges with respect to work safety and how to deal with these conditions contractually. In this paper Dr O T Blindheim addresses these issues
Factors of shotcrete lining design
01 October, 2003
Max John, consulting engineer to the ILF Group, and Bruno Mattle, of ILF Consulting Engineers, describe how shotcrete lining, vital as support in low overburden tunnels, is modelled in numerical analysis
KCRC Tsim Sha Tsui Extension Tunnels
01 October, 2003
Cut and cover construction of the Tsim Sha Tsui extension tunnel in Hong Kong has pushed the engineering limits of working in confined spaces. Ir Patrick Ng, project engineer for the client, the Kowloon Canton Railway Corporation, describes one of the city's most challenging underground projects to date
Evolution in shotcrete technology
01 October, 2003
Increasingly, emphasis within the industry is towards a 'holistic' development of sprayed concrete technology. Assistant editor, Amanda Foley, looks at some of the recent developments in shotcrete materials and talks to two of the industry's leading materials and equipment suppliers
Back on track at Vietnam's Hai Van Tunnel
01 October, 2003
After early problems getting the tunnel works underway, progress on the Hai Van tunnel in central Vietnam is now on schedule for breakthrough in October and opening at the start of 2005. Resident engineer for the South Tunnel Section Nigel Butterfield, of the Louis Berger Group, reports on the current status on site
Large diameter soft ground collapse recovery
01 October, 2003
A collapse during construction of a large-diameter, soft ground tunnel needs swift action to minimise disruption to construction programme. Colin Speers, senior tunnel engineer, and Bradford Townsend, technical director/design manager of Civil Works, both of Parsons Brinckerhoff, and John Ager, independent engineering geologist, provide guidelines and considerations on how to split the remediation process into discrete elements, that closely shadow everyday design and construction, to speed up the critical process of collapse recovery