Underground Portal

UndergroundEnhancement of Shotcrete Performance with a Pozzolanic- Based Rheology Control Agent

Ezgi Yurdakul and Klaus-Alexander Rieder

In underground applications such as mining and tunneling, shotcrete is widely used for structural support of permanent openings, linings, and rock stabilization.

UndergroundACI Nozzleman Certification and Underground Robotics

Chris Zynda

I have been in the shotcrete industry for over 50 years. It all started with shoveling sand behind a gunite (dry-mix) machine and then moving on to foreman, superintendent, and ultimately owner of a shotcrete contracting firm.

UndergroundGeneralConfined Space? In the Shotcrete World

Mike Munyon and Frank E. Townsend III

In life, learning from practical experiences often requires learning from our misunderstandings and mistakes.

UndergroundNondestructive Approach for Shotcrete Lining Strength Monitoring

Vishwajeet Ahuja and Benoit Jones

Shotcrete lining forms an integral part of conventional tunneling and is widely applied for underground excavations. Early strength gain of the shotcrete is a crucial aspect for ground support and safety of operatives.

RepairUndergroundEast End Crossing

Marcus H. von der Hofen

The East End Crossing project, currently under construction by WVB East End Partners, will connect the east end of Louisville, KY, near Prospect, KY, to southern Indiana, nearUtica, IN.

UndergroundStructuralPreparing for Vancouver’s Growing Neighborhoods – The New Mount Pleasant Hydroelectric Substation

Brian MacNeil

Within the ever-evolving construction industry, better products and building practices are making it easier than ever to tackle some projects once deemed impossible.

UndergroundCreating a Wine Cave

Jason Zignego

RepairUndergroundLong Prairie Digester Rehabilitation Project

David Graham

The Long Prairie Digester is a wastewater treatment facility constructed in 2012 to process wastewater generated by food processing operations.

RepairUndergroundLiberty Tunnel Arch Restoration with a Shotcrete Alternative

Axel G. Nitschke and John Becker

The Liberty Tunnel provides a direct commuting route from the South Hills suburbs to downtown Pittsburgh, PA.

RepairUndergroundRobinson Creek Tunnel Fire

Randy Zeiger, Gabrielle Cadieux, Denis Laviolette, Nick Laviolette, Justin Laviolette, and Edward D. Sparks II

On the eve of Saturday, April 26, 2014, an arson fire engulfed a CSX Transportation railroad tunnel near Robinson Creek, KY, cutting off service to two active coal mines in the area.