Tunnels Files - Case Studies when Tunnels Were Involved

Sealing Leaks in Coal Mine Slope

American Cyanamid AM-9 Technical Manual 1960

  • During the winter months, small drips from the roof froze into large ice masses, obstructing the passage of men and equipment, and becoming a safety hazard.

Shutting Off Water During Tunneling

American Cyanamid AM-9 Technical Manual 1960

  • A six- foot diameter tunnel, 139 feet long, had to be driven through a cinder-slag fill with voids estimates as high as 70 percent. The tunnel dropped 25 feet over its length and terminated in a cofferdam about 23 feet below river level.

Cutting Water Flow in Colliery Drift

American Cyanamid AM-9 Technical Manual 1960

  • Problem: In driving two drifts for this new project, several badly fissured water-bearing rock zones were intercepted. Upon completion, water at the rate of several thousand gallons per hour was entering the drifts from a subterranean water table.

Controlling Seepage During Construction of Underground Missile Bases

American Cyanamid AM-9 Technical Manual 1960

  • Problem: With construction still in progress, numerous leaks appeared at the joints and bolt holes of corrugated steel-pipe tunnels connecting missile silos to control centers. Welding and sealing compounds failed to stop seepage.

Consolidating Weakly Cemented Sandstone During Cross-Cut Construction

American Cyanamid AM-9 Technical Manual 1960

  • Problem: At Seafield Colliery, three cross-cuts, 16-17 feet wide by 12- feet high, were being driven horizontally through the Millstone Grit series, which contained many weakly cemented and porous sandstones.

Stabilizing Running Sand During Pipe-Jacking

American Cyanamid AM-9 Technical Manual 1960

  • Problem: A city water supply pipeline, 126 cm. in diameter, has to be placed under the Keiyo Highway in close proximity to an irrigation channel. The water supply pipe had to be placed without disturbing highway traffic.

Toronto Successfully Using Acrylamide Grout to Stop Tunnel Leaks

L.Narduzo, P.E., Leak Remediation Engineer for Toronto Transit Commission Underground Construction Magazine 2003

  • The Toronto Transit Commission (TTC) is responsible for one of the largest public transportation systems in North America. The tunnel leak remediation program was built around a solid foundation of expertise in the specialty field of grouting.

Working at Ground Zero

Brent Keller Water Control Quarterly 2002

  • As the recovery and rebuilding of New York City continues, new problems and challenges continue to present themselves at Ground Zero.

ICGA White Paper

Angus W. Stocking, L.S. ICGA 2011

  • The Role of Chemical Grouting in Wastewater Systems: How to Reduce I&I and Prevent Structural Damage with Intelligent Use of Chemical Grout

Ultrafine Cement Grout Seals Fissures in Salt Caverns

Water Control Quarterly 1999

  • The WIPP in New Mexico was created as an R&D facility to demonstrate safe, long-term disposal of radioactive wastes. However, before waste could be shipped to the plant, fissures in the underground salt cavern had to be sealed.

Geotechnical Project Overview

Avanti 2011

  • A list of sample geotechnical projects. Over 90 case studies may be found at www.AvantiGrout.com.

Stops Leaks in Concrete Structures

Avanti 2011

  • Avanti International chemical grouts can stop leaks in: cracks or joints, precast structures, dams and reservoirs, mines and tunnels, and manholes.

Using Grout to Lock Pollution in Place

Jeff Griffin Underground Construction Magazine 1998

  • In Pennsylvania, Rembco used grouting to contain oil leaking under an oil refinery’s sea wall. The concrete wall had been constructed on top of old wharf piling. Over time, tidal action caused erosion, resulting in leakage at the wall’s base.

Re-Emergence of Chemical Grout

Public Works 1995

  • Recent studies and over 40 years of experience indicate that America's first trenchless technology is still the best, most effective, long-term defense against infiltration.

Solving Trunk Sewer Installations Across Growth Faults

Brent Pettersson, P.E., Brown & Root Rehabilitation Technology 1996

  • The City of Houston has two unique grouting projects in place that hold promise to support trunk sewer lines installed inside primary-lined tunnels crossing faults.
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