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London Underground
  Content Type Features
  Date 2012
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Going underground
26 October, 2012
Spanish cities are tracking a world trend in moving below ground. This paper, submitted by the TAC, explores the use of underground space in Spain and it’s efforts to emulate the success seen in Montreal and Toronto. Technical writers Alfonso Perez and Amaia Arteta report

Prepare for takeoff
24 October, 2012
Toronto’s Billy Bishop Airport, located downtown and on an island on Lake Ontario needed a way to reliably transport passengers to their flights. A new pedestrian tunnel is under construction under the lake, Nicole Robinson reports

An art for humble men
19 October, 2012
Tunnels revisits the traditional methods. Hand mining and its health and safety related concerns are well known, while the traditional soft ground timber supports are increasingly forgotten, as the old methods get pushed aside by the march of mechanisation. Alex Conacher reports

Can someone please explain exactly what is SCL?
30 August, 2012
A speedy and uncomplicated method has fallen prey to overdesign and endless codes. David Hindle, partner of OTB Engineering speaks out on the present state of SCL design in the United Kingdom

Advances in SCL design and construction
30 August, 2012
This article presents the state of the art use of sprayed concrete with a variety of waterproofing solutions on major projects in the UK. It discusses the current design of permanent sprayed concrete and sprayed waterproof membranes and how SCL design may progress in the future. Report by Andrew Pickett and Simon Stephenson of Mott MacDonald

Crossrail planning dock breakout
16 July, 2012
When Crossrail took over the ancient Connaught Tunnel as part of its route through east London, it was envisaged that it would be brought up to standard with a fill and re-excavate procedure, but further site investigations led to concerns that will now be tackled by open excavation through the Royal Docks

Delhi digs
19 June, 2012
With a metropolitan population of over 16 million, a failed foray into privatised bus services and cars choking up one of the densest road networks in India, need for a metro has never been more pronounced. Alex Conacher interviews designer Mohan Gupta and Delhi Metro Rail Corporation spokesman Anuj Dayal to get the jewel of India’s infrastructure crown into perspective

Power up the future
17 May, 2012
UK gas and electric power network operator National Grid is engaged in a major renewal programme to ensure power supplies for the future. One aspect is to install high-voltage cables underground to renew the grid in major urban areas, starting with London. Maurice Jones visited one of the current tunnel drives in a 32km-long network that started recently in north London

Tunnelling induced settlements in London clay
20 April, 2012
Robert Mair of Cambridge University, Jamie Standing of Imperial College and Keith Bowers of London Underground presented three papers on the effects of settlement in London Clay at a joint meeting of the BTS and British Geotechnical Association in January

Getting to the core of the matter
19 April, 2012
Since there still seems to be a marked reluctance in many quarters to spend much on site investigative work before main tunnel construction commences, it is fortunate that drilling, probing, sampling and testing methods are gradually becoming more efficient in terms of speed, accuracy and, hopefully, cost. However this demands a much higher level of sophistication in the technology employed. Maurice Jones checks on what is available

Primary risk reduction
18 April, 2012
It is notable that many treatises on the subject of project risk management do not pay much attention to the subject of site investigation (SI), even though the gathering of accurate information before a tunneling project commences is bound to decrease risk to a project. Today there is a wide array of techniques available to collect such information and costs that can be balanced favourably against overall project expenditure. Maurice Jones reviews some of these

Supporting Victoria
17 April, 2012
The UK’s first use of jet grouting in conjunction with shallow sprayed concrete lined tunnelling and pioneering use of building information modelling are among the many innovations on London Underground’s ultra-challenging Victoria Station Upgrade programme. Andrew Mylius of Mott MacDonald reports

Present and future state of UK tunneling
16 April, 2012
Outgoing chair of the BTS Bob Ibell looks at the recent achievements of the UK tunnelling industry and the current state of works