Search Results: 'London Underground'

Ventilation and climate for a 53km trans-Andean base tunnel
26 December, 2011
This paper, adapted from that presented at the Underground Construction conference in London, UK, inApril by Andrea Krpo, describes ventilation concepts, including fire control, for a proposed rail basetunnel through the Andes to improve transport between Argentina and Chile. Co-authors are Mattia Ferrazzini, Michael Flueckiger and Peter Reinke, all of HBI Haerter of Berne, Switzerland

Corrosion proofing to protect sewers
19 December, 2011
In 2006, the EPA reported on emerging technologies in gravity sewer conveyance liners. Since that time some of the technologies in corrosion proofing of segmented liners have emerged. In the first of a two-part series Jon Kaneshiro, David Yankovich and Kenneth Kuhr of Parsons Corporation review available one- and two-pass corrosion proof liner systems

In the belly of the beast
10 November, 2011
T&TI cuts through the bureaucratic smoke and mind-boggling statistics to unearth what it means to set up shop in the world’s fastest growing superpower. Alex Conacher enters the dragon’s lair to speak with Paul Jenkins of Mott MacDonald and Gary Ge of Arup

TCR a century on: five worksites in one
18 October, 2011
Tottenham Court Road is undergoing two major development projects, for Crossrail and London Underground. The ageing station’s concrete structure has had over 100 years to set and with few records to warn of what lies beyond it, tunnellers have to be ready for anything - there are even rumours of a discarded TBM. Alex Conacher visits the site and meets with resident tunnelling bigwigs

Where the work is
18 October, 2011
As T&TI goes to press the general and business media are awash with stories of economic gloom and dire predictions, and yet the tunnelling industry in Western Europe seems relatively buoyant. Can this comparatively happy state continue? Maurice Jones checks on the major current and planned projects and the prospects for some big players headquartered in Western Europe

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.

Predicted and encountered deformations
25 August, 2011
Andreas Feiersinger of Dr. Sauer Company was the runner up in the British Tunnelling Society 2011 Harding Prize for this paper comparing deformations predicted using 3D Finite Element Analysis with those encountered on the Green Park station upgrade in London

Grouting supports tunnelling market
24 August, 2011
The principles of grouting to improve the stability of ground around underground excavations has been known for a long time, but greater attention to the basic questions of ‘where?’ and ‘when?’ has led to grouting operations that are much more sophisticated than pumping mortar into the ground more in hope than judgement. Maurice Jones explores some of the more advanced grouting techniques now being used and how they help make more tunnelling projects possible or easier

Experiences with sprayed waterproofing
23 August, 2011
The following article is based on a presentaton made to the ‘Underground Construction‘ conference in June in London and is based on the experiences of three tunnel engineers on projects utilising sprayed waterproof membranes. The authors are David Naylor, Petr Salak and Simon Stephenson, at the time all of Mott MacDonald consulting engineers

Qatar set for next tunnelling boom
22 August, 2011
Mechanised tunnelling is finding favour in the Middle East as infrastructure plans increasingly call for underground development. Bernadette Ballantyne reports

‘Tommy’ Talbott, as he was known
29 July, 2011

The end of one man’s era at Halcrow, marks a UK tunnelling legacy
28 July, 2011

Keeping London Underground dry
25 July, 2011
In the complex and sometimes ancient world of the London Underground, or ‘Tube’ as it is known colloquially, maintenance and refurbishment are major priorities within a capacity improvements programme. Water control is only one, but an important, part of this. Maurice Jones spoke to Dr Keith Bowers, Engineer in charge of London Underground tunnels for Transport for London

Membranes in the mix
22 July, 2011
There are many approaches to trying to keep a tunnel permanently dry, and as many factors in whether a method is a success. Maurice Jones enters the battle between competing membrane systems

Call for papers
18 July, 2011

Channel Tunnel risk profile for policy
13 April, 2011
This article is based on a the presentation by Richard Clifton to the 2nd Annual Fire Protection and Safety in Tunnels Conference held in Milan, Italy, in October 2010. The presentation was entitled ‘Case Study: An exploration of Channel Tunnel design and operation, factoring in risk profile, to assess key safety policies’. Richard Clifton is chairman and head of the UK delegation to the Channel Tunnel Safety Authority within the Office of Rail Regulation, UK

From the ground up - to project control
14 March, 2011
What happens when underground construction practice doesn’t follow design theory? How can engineers find out what is actually happening with accuracy to reduce risk? The principles of structural monitoring have been known for many years but technical developments in instruments to test ground conditions in situ have increased reliability and reduced cost to such an extent that the wealth of information available has required new thinking in data handling, analysis and presentation. Maurice Jones checks with some leading participants on how data is now collected handled and used, plus how improvements might come about

Overlooked hazards to occupational health
18 January, 2011
During safety campaigns, whether during planning or in-house inspection, often disproportionate attention is paid to more obvious physical hazards, overlooking those hazards that are less obvious but which call still lead to a deterioration in quality of life, and perhaps death, which can be difficult to relate to the working conditions. Drawing heavily on material supplied by Dr. Donald Lamont, formerly of the UK Health and Safety Executive, Maurice Jones examines the issues involved in tunnelling occupation health, and some other safety hazards, followed by some solutions