The world’s largest Tunnel Boring Machine or TBM just arrived in Seattle last week from Japan. Hitachi Zosen Corp built the 57 foot diameter TBM and tested it before disassembling it for the journey by […]
This is a great video showing the application of ground freezing to deep excavations in unstable soil and high groundwater table. It’s also a nice overview of the reason the Hetch Hetchy project was undertaken, […]
For those outside the UK, the Crossrail project is a mega-project upgrade to the London metro area’s subway system. The tunneling portion of the project will consist of 21-km of twin-bore tunnels excavated by eight […]
Drilled shafts have been installed by Malcolm Drilling to form the secant pile retaining walls to support the 400 ft x 80 ft x 80 ft launch pit for the SR 99 tunnel boring machine […]
Construction has started on the tunnel boring machine launch pit for the WSDOT SR 99 Tunnel Project (Viaduct Replacement). The 420 foot long pit is being constructed using secant pile retaining walls, with 2 rows […]
The German Chancellor and Chinese Premier toured a Herrenchnecht facility in China’s Guangzhou Province where Tunnel Boring Machines are manufactured for many of China and Asia’s high-profile tunnel projects. Herrenknecht maintains nine locations in China […]
The Port of Miami mega project is celebrating a significant milestone today. A massive 41-foot diameter tunnel boring machine will start excavating the first of the twin tunnels that will connect the Port of Miami […]
The August 2011 issue of Tunnel Boring Magazine contains a profile on Brierley Associates, an engineering firm specializing in tunnel design based in the Denver, Colorado area. The article provides some nice insight into the […]
Tunnel Boring Magazine has this synopsis of the project: The East Side Access project in New York City involves some of the most complex civil construction in recent years. The project involves constructing new tunnels […]
Drill and Blast and Tunnel Boring Machine are two common types of tunnel construction methods. But roadheaders have been around for many years, getting their start in the coal mining industry. So where do they […]
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