Herrenknecht’s Full Face Hole Opener
In Theory and in Practice In 2015, after several years of development, Herrenknecht AG launched…
Author By Michael Lubberger
Ventilation on the World’s Longest Railway Tunnel
With up to 2,300 m of rock on top of it, the Gotthard Base Tunnel is not only the world’s longest, but also the deepest railway tunnel ever built, creating unique challenges for designing a ventilation system.
Ground Improvement for Groundwater Control
Whether the need for ground improvement is known in advance or unexpected, the techniques available are the same. However, the approach to the work is different.
Cement Grout vs. Chemical Grout: Which One to Use, When, and Why
By Britt N. Babcock, P.E. Used on a myriad of new and rehabilitation construction…
Best Practices in Managing Urban, Underground Transit Systems
The worldwide tunneling construction industry is witnessing a historic boom as tunnels become viable solutions to traffic congestion, dwindling right of way, aging infrastructure, rapidly expanding urban centers and population growth. As such, the need for skilled program management services is growing exponentially.
Microtunneling Provides Solution for Project under Toronto’s Pearson International Airport
The value of microtunneling was on display at Lester B. Pearson International Airport in Toronto recently for the completion of the Twinning of the Etobicoke Creek Trunk Sanitary Sewer project. The project was needed by the Region of Peel to complete a critical infrastructure link underneath runways and taxiways on the airport grounds.
Maintaining Critical Infrastructure
The Callahan Tunnel, originally opened in 1961, recently underwent a renovation project and took advantage of the new waterproofing materials.
WTC 2016 Heads to San Francisco
The Underground Construction Association and the International Tunnelling Association (ITA) will host the 42nd annual World Tunnel Congress and General Assembly in San Francisco, April 22-28, 2016.
Short Crossing Provides Big Challenges
Triad/Midwest Mole worked with the City of Joliet, Illinois, to complete a short but challenging crossing of the Des Plaines River.
The Indianapolis Underground Speedway: Continuous Conveyors Keep TBM Moving
In an industry that looks to innovations that guarantee faster, safer and more efficient tunneling, the continuous conveyor system is an existing option that fits the bill. A Robbins continuous conveyor proved this point recently on the Deep Rock Tunnel Connector in Indianapolis.