Search Results: 'Hitachi'

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SR99 TBM rescued
01 May, 2015
USA - Seattle Tunnel Partners (STP) completed the lifting process to remove the 57ft (17.4m) diameter cutterhead and main drive unit of the TBM mining the SR99 replacement tunnel on March 31, the Washington State Department of Transportation (WSDOT) announced.

San Francisco success
03 February, 2015
The first water passed through the 8km-long San Francisco Bay Tunnel in October 2014, well ahead of an original 2015 schedule. The project also came in well under budget, Adrian Greeman reports.

Construction for Alaskan Way shaft walls off schedule
01 August, 2014
USA - Seattle Tunnel Partners (STP) announced on July 28 that building the underground walls of the circular pit creating access to repair the TBM will take longer than anticipated, according to the Washington Department of Transportation (WSDOT).

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.

How the west was won
27 June, 2014
Tunnelling work is as diverse and plentiful as the geography in the West Coast.

Shake and bake – Seismic and Geoelectric Prediction
26 March, 2014
Tucked in a corner of Bauma 2013, Geo Exploration Technologies set up their stand to showcase Bore Tunnelling Electrical Ahead Monitoring (Beam). The geoelectric system, developed a decade on from the introduction of geo-seismic predictive technology to the tunnelling industry, has a few key advantages claimed, while Amberg’s offering of Tunnel Seismic Prediction gets a revamp. Alex Conacher reports

Hitachi fly in for Seattle TBM fix
25 February, 2014
Seattle Tunnel Partners (STP), the design-build contractor for the Alaskan Way Viaduct replacement tunnel in Seattle, will dig an access shaft to repair or replace the TBM seal. Client Washington State Department of Transportation (WSDOT) said Friday experts from TBM manufacturer Hitachi-Zosen were flying from Japan to finalize the repair plan.

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.

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

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

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

TBM LIFTS
19 February, 2013
Robbins technical writer Desiree Willis looks at the pivotal role of cranes in TBM assembly

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

Students asked to name world's largest TBM
01 November, 2012
Washington State Department of Transportation (WSDOT) has asked students in the state aged up to age 18 to find a new name for the State Route 99 TBM, which is currently under construction in Japan.

Traditional shields
15 October, 2012
Japan-based Hitachi Zosen has been manufacturing TBMs since 1967. Yasuharu Hanaoka of the manufacturer’s industrial machinery business unit notes the decline in the open, semi mechanized shields that the company did brisk business within previous decades, as closed EPBMs and slurry machines have come to prominence. He explores the technology, and gives a recent example of a ‘traditional method’ shield in operation

Advance below the bay
24 May, 2012
The EPBM cutting below the San Francisco Bay is smashing advance rate expectations as the team battle with environmental limitations and brace for tougher ground. Rhian Owen reports

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

First U220 breakthrough
03 April, 2012
Breakthrough was reached on the first bore of the U220 University Link Light Rail in Washington, D.C., US.

ESP filtration use and developments
08 February, 2012
Mountainous Japan was the first country to use electrostatic precipitators to filter tunnel air. Arnold Dix of the University of Western Sydney and Atsushi Katatani of Panasonic Ecology Systems give a history of the improvements and use of ESPs in Japanese tunnels

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