Tunnels Files - Case Studies when Tunnels Were Involved

Magazine Article: 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.

Case Study: 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.

Case Study: 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.

Case Study: 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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