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Current Refinements
  Date 2013
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What goes up
19 December, 2013
Ensuring the correct lifting strategy is vital to the success of any tunnelling project, reports technical journalist Bernadette Ballantyne.

Forward March
19 December, 2013
Bahram Salehi and Mahsa Shahandeh present their work on the validation of TBM advance rate predictions, with reference to a case study in Iran.

Tunnel expert joins Bekaert
16 December, 2013
Aldo Ceresolawill, who has some 20 years of experience in underground construction, will join Bekaert's Swiss Dramix team.

One machine, two modes
12 December, 2013
Hybrid machines gain ground in the industry. Desiree Willis, technical writer for Robbins reports on the increase in demand, and asks why.

South by Southwest
12 December, 2013
The southern states grapple with water supply as drought conditions worsen and stormwater from flash floods cause damage for homes and businesses

Bay area breakthrough
12 December, 2013
Excavation of the entire 18,660ft New Irvington Tunnel is complete in San Francisco. On October 8 two crews of miners from the Southland/Tutor Perini JV met underground with a roadheader digging away at the last final feet of rock.

Tropical weathering
12 December, 2013
Maria Cecilia Sierra of Colombia-based engineering services, design and management provider Integral discusses the geotechnical behaviour of underground excavations in volcano-sedimentary rocks in tropical sand.

Public opinion
12 December, 2013
Almost four years ago Congress passed the Affordable Care Act (ACA) dubbed "Obamacare" by detractors. As this new year begins most aspects of the ACA that haven't already started are now effective-such as the health care exchanges for people buying their own plans, and making it illegal for insurers to deny coverage based on preexisting conditions.

Canada’s project of the year
12 December, 2013
As tunnels went to press the Tunnelling Association of Canada's annual awards were in full swing. The award for best Canadian tunnelling project for 2013 went to a project that had to endure some of the toughest ground conditions, consistently varying, and continually testing the skills and knowledge of the teams involved.

Growing underground
11 December, 2013
Ever more efficient mine development infrastructure, and geotechnical planning, are key to expanding production at major mines. Report by Patrick Reynolds

More work available for contractors
05 December, 2013
A third-quarter workload report from the UK¹s Civil Engineering Contractors Association (CECA) has revealed that 58 per cent of firms secured more work in the last 12 months than the same period a year ago.

LTA awards further Thomson Line contracts
04 December, 2013
The Singapore Land Transport Authority (LTA) has awarded two further civil contracts on the 30km long fully underground Thomson Line, it was announced late last week. Contracts T202 and T217 have been awarded to Penta-Ocean Construction Co and Sinohydro Corporation respectively.

Thames Water awards London sewage upgrade contract
04 December, 2013
Thames Water has confirmed Aecom and Murphy Kier (AMK) as the successful contractor for a GBP 177M (USD 290.4M) rebuild of one of London’s largest sewage works.

Eaves Machining win Crossrail cross passages
04 December, 2013
Manchester-based Eaves Machining announced this week it has secured a tunnelling contract worth GBP 1.2M with Spanish contractor Dragados. The contract, to be completed within the next eight weeks, emerged following the completion of the main tunnel drive on the Crossrail Contract 305 earlier this year.

Inroads below
04 December, 2013
TBMs, hybrids, and pipejacking technology are finding greater applications and opportunities in mining, reports Patrick Reynolds

Infrastructure expansion
04 December, 2013
Mining developments in Queensland require major port expansion. One of the largest schemes is underway at Gladstone. Technical journalist Adrian Greeman reports

Automated goldfields
04 December, 2013
Australia's deep mines have stuck to tried and tested manual drill operations until recently. But a few mines are testing out computerised rigs, a possible prelude to fuller automation. Technical journalist Adrian Greeman reports from one in Western Australia's Kalgoorlie region

Golden soil and wealth for toil
04 December, 2013
Few countries have as many mineral resources as Australia, and in such quantities, from coal and oil to iron, gold and nickel. Mining and other extraction is an increasingly large part of the economy, reports technical journalist Adrian Greeman

STUVA preview
04 December, 2013
Every two years STUVA hosts a tunnelling conference and the 2013 edition takes places this month in Stuttgart, Germany

Extreme Immersion Design
04 December, 2013
The Second Coen Tunnel must survive severe loadings during the usage phase: 16m of water in the middle of the North Sea Canal and 8m of soil at the banks. The determining design scenarios were the sea transport of two days and possible impact by a sunken ship. This article goes into the general immersed tube principle and the construction and transport phases. The usage phase will be covered in the next article, to be published in an upcoming issue of Tunnels