Tunnel boring - Articles - Page 6 | Engineering News-Record

Contractor To Bear Chesapeake Bay Project Spoil Disposal Cost

March 7, 2018

With tunneling on a new one-mile tube for the Chesapeake Bay Bridge-Tunnel set to begin next year, project officials are readying plans for handling an estimated 500,000 cu yd of potentially tainted spoil to be produced by a 42-ft-dia tunnel-boring machine, currently under construction in Germany.

VDOT Releases RFQ for Expanded Hampton Roads Bridge-Tunnel

The estimated $3.3-billion to $3.8-billion project would relieve traffic at the region's busiest water crossing

Justin Rice

December 19, 2017

No Comments

The Virginia Dept. of Transportation is seeking requests for qualifications to build the Hampton Roads Bridge-Tunnel Expansion.

International Projects

Collapsing Alpine Railroad Tunnel Forces German Contractor To Bury TBM

Peter Reina

August 29, 2017

No Comments

A section of the international Rhine Valley Railroad started sinking in mid-August as the 10.9-m-dia, 93-m-long bentonite TBM worked a few meters below ground in soil that had been supposedly stabilized by freezing.

Disassembly of Bertha Reaches Halfway Point

Tim Newcomb

July 17, 2017

No Comments

Bertha, the tunnel-boring machine that recently completed a 9,270-ft tunneling journey underneath downtown Seattle has reached the halfway point of another milestone: disassembly.

TBM Bertha Completes 1.7-Mile Tunnel Bore in Seattle

Tim Newcomb

April 4, 2017

No Comments

Cross the finish line over two years late, the tunnel-boring machine Bertha completed it's 1.7-mile journey on April 4.

Crews Lower TBM Shield as $1.6B LA Metro Tunnel Starts

October 26, 2016

No Comments

The tunnel-boring machine will dig twin 1.1-mile-long tunnels for the Los Angeles Regional Connector transit project, with tunneling to begin in early 2017.