Related Articles

Roof drills on the TBM installing 20-ft long rock bolts in the ceiling of the Niagara Tunnel
Project Related

A Novel Approach at Niagara: Robbins TBM Stands Up to Challenging Ground with Custom Lining and Ground Support

June 20, 2010 rockman Project Related Comments Off on A Novel Approach at Niagara: Robbins TBM Stands Up to Challenging Ground with Custom Lining and Ground Support

This article describes the challenges faced by the World’s largest hard rock TBM (47.2-ft in diameter) as it tunnels through some very difficult geology while constructing a massive tunnel under Niagara Falls for hydroelectric power […]

Ft. Collins area trail tunnel being constructed beneath the BNSF railroad
News

Ft. Collins Hiking/Biking Tunnel Beneath BNSF Railroad

November 3, 2017 rockman News, Project Related Comments Off on Ft. Collins Hiking/Biking Tunnel Beneath BNSF Railroad

The City of Fort Collins (Colorado) recently completed construction of a tunnel underneath BNSF Railway tracks to connect more than 30 miles of trails.  The prospect of tunneling under an active rail line is a […]

Malcolm Drilling prepares to drill secant pile drilled shafts for SR 99 TBM launch pit.
Project Related

Launch Pit Retaining Walls Completed for SR 99 Tunnel in Seattle

August 6, 2012 rockman Project Related Comments Off on Launch Pit Retaining Walls Completed for SR 99 Tunnel in Seattle

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 […]