Repair Portal

RepairUndergroundThe Art of Tunnel Rehabilitation with Shotcrete

Harvey Parker, Paul Godlewski, and Roberto Guardia

The art of rehabilitation of tunnels has flourished and developed significantly over the last couple of decades. Several hundred railroad, highway, and conveyance tunnels have been successfully rehabilitated, converted, and/or enlarged. Much of this development can be attributed to the successful use of steel fiber-reinforced

RepairStructuralTieton Dam Spillway Rehabilitation

Larry Totten

Johnson Western Gunite Company rose to the challenge of rehabilitating the Tieton Dam Spillway in Yakima, WA. The spillway, built originally in 1924, was showing significant deter-ioration due to freezing and thawing, weathering, and erosion due to high-velocity water flow. The owner, the United States

RepairShotcrete Repair in Paper Mill

Marc Ferland, Jean-Franscois Robert, and Alain Chasse

March 2002, and May 2002. Work was conducted inside process vessels in a pulp mill by the specialized lining contractor, Canadians Stebbins Engineering Ltd., and the shotcrete contractor, Béton Projeté M.A.H. Due to operational constraints and significant costs involved with downtime, the contractors™ primary goal

RepairGrain Silo Rupture Repair

David Drake

Barlett & Co. faced a huge cleanup job at its 6.9 million-bushel trail terminal in Wichita, Kanasas in the fall of 1999. A grain silo in diameter and tall holding roughly 150,000 bushels.

RepairStructuralDesigning and Installing a Shotcrete Strengthening Application on the Spokane Street Bridge

Basil Kattula and Roger Runacres

The Spokane Steet Bridge connects the community of West Seattle to downtown via Highway 99 and Interstate south of the city center. The bridge was not originally and constructed to handle is present-day usage consequently.

RepairUse of Synthetic Fiber-Reinforced Dry-Mix Shotcrete for the Rehabilitation of a Wharf in Northeast Quebec, Canada

Pierre Lacombe, Martin Grendeau, and Yann Ropars

RepairUse of Dry-Mix Shotcrete to Repair a Lighthouse Structure

Martin Gendreau, Eng. MSc., Denis Beaupre©, Eng. PhD., Pierre Lacombe, Eng. MSc., and Jean De Montigny, Eng. MSc

This paper presents a description of the repair work carried out in 1996 at the Haut-Fond Prince lighthouse structure located in the St. Lawrence River, 8 km (5 mi) from the coast of Tadoussac, Quebec, Canada. The damaged section of the structure in the tidal

RepairStructuralNew Mixture Design and Guide Specifications and Inspector’s Manual

Bruce Johnson

Shotcrete has not traditionally been a material of choice for repair of bridge structures by many state highway departments. One reason for this is that bridge engineers have not been aware of advances in the quality and durability possible with high-performance shotcrete over the last

RepairStructuralShotcrete with Steel Fiber Helps Reinforce Mount St. Helens Project Savings

Alex Keffalas

Thirteen-hundred feet (400 m) of the peak collapsed or blew outwards. As a result, 24 square miles of the valley was filled by a debris avalanche of recreation.

RepairUndergroundStructuralEvolution of Fiber Reinforced Shotcrete

Dr. Rusty Morgan and R. Here

The concept of reinforcing shotcrete with discrete, disominous steel fibers was developed by the Battelle Research Corporation in the USA in the early 1970s.