Search Results: 'Jacobs'

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.

Qatari coup
23 August, 2013
Qatar is preparing to set new records in tunnelling with 26 tBms simultaneously boring 59km of twin bore tunnels creating the first phase of the vital doha metro. technical journalist Bernadette Ballantyne reports

Cleaning up the capital
19 June, 2013
A TBM launch this spring in Washington DC is the first of several to come as the capital cleans up its CSOs. Nicole Robinson looks at the Blue Plains Tunnel.

Under fire under work
13 March, 2013
The risk of fire in tunnels under construction can be reduced in several ways. At the November 2012 BTS meeting Barry O’Donoghue, Mott MacDonald site contract manager; Francois Pogu, Vinci's Lee Tunnel project director; Dave Bulbrook, London Fire Brigade group manager; and Donald Lamont of Hyperbaric & Tunnel Safety reviewed the Storbelt and A86 Socatop tunnel fires, protocol for working with fire brigade and current legislation required for contractors.

Extinction
20 February, 2013
Replacing an outdated sewer will mean tunnelling through a volcano—an extinct one— with unique basalt geology. The City of Honolulu will bid the contract for its wastewater project this spring, Nicole Robinson reports

How low can you go?
20 February, 2013
TBMs have successfully passed beneath the Montlake Cut on Seattle’s University Link Project with only 4m of cover. Andrew Mencke and Lynn Salvati of Jacobs Associates, Seattle, Richard McLane of Traylor Brothers, Seattle, and John Sleavin of Sound Transit, Seattle, explain the design and construction process

Northern Exposure
19 February, 2013
While Seattle is known for its grey drizzly days, the climate for tunnelling is all blue skies. Sound Transit will bid another major tunnelling contract for its regional mass transit system this March, Nicole Robinson reports