Search Results: 'Perini'

Vital tunnels for utilities
22 February, 2023
Utility tunnels are among key underground investments in two major Canadian cities – Toronto and Vancouver

Vital tunnels for utilities
16 February, 2023
Utility tunnels are among key underground investments in two major Canadian cities – Toronto and Vancouver

Momentum
23 December, 2019
The City of Los Angeles has seen several milestones this summer for its Purple Line extension, Nicole Robinson reports on the progress for each phase

Momentum
27 September, 2019
The City of Los Angeles has seen several milestones this summer for its Purple Line extension, Nicole Robinson reports on the progress for each phase

Under the dam
26 October, 2018
Paola De Pascali spoke with Tony Dell, lead geotechnical engineer at SNC-Lavalin to discuss the excavation of the John Hart powerhouse and tunnels, including an unexpected soft ground surprise

Seattle Start up
25 May, 2016
repair work for giant TBM “Bertha" finished earlier this year. Patrick Reynolds reports on the two-year-long process

Seattle start up
18 February, 2016
Repairs are finished for giant TBM “Bertha". Patrick Reynolds reports on the two-year-long process

The Seattle Saga
27 June, 2014
After six months of tunnelling standstill, construction is tarting on an access shaft to repair the TBM mining the SR 99 bore in Seattle, the largest diameter machine in the world. Nicole Robinson explores the machine’s initial journey and downtime.

Crossing the tracks
27 June, 2014
San Francisco’s Central Subway moves below rail lines, utilities and more, Desiree Willis of Robbins reports.

On the high road
19 March, 2014
Roadheaders, the underdog of the tunnelling industry, have secured their place as an economical and variable excavation tool, ideal for short drives and changing ground. Technical journalist Rhian Owen examines the principles.

In the nick of time
19 March, 2014
As the Hudson Yards development moved toward construction, a small window of opportunity for new rail infrastructure connecting New Jersey to Manhattan began to close. Nicole Robinson looks at the tunnel box project securing the right of way for potential tunnels under the Hudson River.

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.

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.

Down the road
10 October, 2013
Roadheaders, the underdog of the tunnelling industry, have secured their place as a economical and variable excavation tool, ideal for short drives and changing ground. Technical journalist Rhian Owen examines the principles.

Seattle Surge
19 February, 2013
The west coast of the US is home to a strong tunnelling market. Tunnels North America looks at Seattle in particular this issue, but let there be no doubt, other cities in the region are just as busy underground, Nicole Robinson reports

Quake proof
21 November, 2012
Following the 2001 quake, it was feared that another major incident could cause Seatle's fragile highway viaduct to ‘pancake’. Rhian Owen reports on the replacement of the viaduct with more stable infrastructure: a tunnel

To prevent a pancake
22 May, 2012
Following the 2001 quake, it was feared that another major incident could cause the fragile Alaskan Way Viaduct to ‘pancake’ from the shaking. Rhian Owen reports on the replacement of the viaduct with more earthquake-resistant infrastructure – a tunnel

Out with the old and in with the NIT
06 February, 2012
Keeping the water flowing is the soul objective of the New Irvington Tunnel as the old struggles against the constant threat of a major earthquake. Nicole Robinson was on site in San Francisco to see the roadheader excavating the 3.5 mile (5.6km) of tough and changing geology drive

From sea to shining sea
06 February, 2012
Demand for tunnels in North America is strong to meet public transportation and water conveyance needs. Nicole Robinson highlights projects in the region