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  Date 2012
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Loan secured for London's Northern Line extension
11 December, 2012
The UK Government has agreed a loan of up to GBP 1bn (USD 1.6bn) that will allow London Underground to fund an extension of the Northern Line to the Battersea Power Station site. The work includes 3km of TBM driven tube-twin tunnels and two new stations, the Greater London Authortiy (GLA) announced late last week.

Third TBM begins tunnelling on Crossrail
04 December, 2012
The 1,000t TBM, Elizabeth, has begun the 8.3km tunnelling journey to create the eastern section of the new rail line between Docklands and central London, Crossrail announced late last week. Elizabeth has now placed the first of 110,000 concrete segments that will line the eastern tunnels.

BTSYM conference a resounding success
22 November, 2012
The British Tunnelling Society Young Members (BTSYM) hosted their first conference last month. The International Conference for Young Engineers played out to a packed auditorium and audio-linked overflow room at the Institution of Civil Engineers (ICE) in London, UK. The given purpose of the conference was to educate young tunnel engineers, and to expose university students to the profession.

London Tube reliability reached record levels during Olympics
08 November, 2012
The London Underground network's reliability has reached record levels after its best performance during the 2012 Olympic Games, Transport for London announced today.

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

Breakthrough on London Power Tunnels project
12 September, 2012
Tunnelling operations reached a major landmark on London Power Tunnels project, it was announced late last week. TBM Evelyn has dug almost 3km of tunnel below London and has now reached the pre-prepared tunnel shaft at the site off National Grid's Canal Way in Kensal Green.

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

London crawling
27 August, 2012
As T&TI goes to press in its London offices, and the world watches the city prepare for the Olympics, locals are bemused at the prospect of inviting 5.3 million guests from all over the world to fight for a seat on the aging, and massively over-capacity infrastructure in the UK capital.

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

Shortlisted bidders for Bank Station announced
10 May, 2012

London Underground trains hit tunnel bulge
26 April, 2012

TBM moves for London Power
25 April, 2012

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