Tunnels Files - Case Studies when Tunnels Were Involved

Subway System Rehabilitation

Ray Bahr III Water Control Quarterly 1998

  • This rehabilitation project consists of stopping leaks, replacing concrete, installing new tracks on the northbound side and filling voids underneath southbound tracks that were caused by water flowing underneath the tracks.

Trenchless Technology: Avanti Leads in Industry Development & Education

Allen Thomas Trenchless Technology Magazine 1994

  • Trenchless Technology - June 1994 - Avanti leads in industry development and education: In 1978 when Avanti International was formed by four rehab contracting companies, David Magill was hired as its first employee and the company's first president.

We Kept the Airplanes Flying with Chemical Grout!

Jackie Spurling, P.E., Vice President, Stanley Engineering Company, Houston, TX Avanti International 2000

  • In 1997, serious leaks developed at George Bush Intercontinental Airport in a long utility tunnel connecting a passenger terminal with the central plant.

Costs of Chemical Grout (Would You Spend)

David Magill Avanti 2009

  • Are you spending thousands of dollars each year treating clean water? Recent studies and over 50 years of experience indicate that America's first trenchless technology is still the best, most cost-effective, long-term defense against infiltration.

Rembco Undertakes New Project for Hazardous Waste Containment at ORNL

Avanti News + Views 2005

  • "Locking hazardous materials in place is almost always safer and more cost effective than removing them for treatment, and there typically is no ongoing maintenance" -Clay Griffin, President of Rembco Geotechnical Contractors, Inc.

Ultrafine Cementitious Grout

U.S. Grout, LLC 2000

  • Ultrafine Cementitious Grouts from US Grout

Acrylamide Grout Aces 20-Year Test

Greg Thompson Trenchless Technology 2008

  • Grouting has occasionally been thought of as a more temporary solution, a stop-gap. But recent testing of two 20-year old acrylamide grout rehab projects indicate that grout can certainly stand the test of time.

Preventing Leaks While Sinking Tunnel Shafts

American Cyanamid AM-9 Technical Manual 1960

  • Problem: Twelve manhole shafts for a mile-long tunnel, part of a trunk storm sewer being constructed 50 feet below a Dallas Freeway, had to pass through 20 to 25 feet of saturated sand before reaching bedrock.

Grouting in Fissured Rock

American Cyanamid AM-9 Technical Manual 1960

  • Pumping costs at Cedar Bay Mine were becoming excessive, as new drifts were opened and total seepage into the mine increased.

Leaks Stopped in Airport Tunnel

James Applegath Water Control Quarterly 1998

  • At George Bush Intercontinental Airport (Houston, TX), the physical plant is connected to the passenger terminals by a tunnel. Cracks had developed in the ceiling of the tunnel, and by summer 1997, water was pouring into the tunnel and onto the pipes.
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