Structural Portal

UndergroundStructuralShotcrete for Ground Support: Current Practices in Western Canada

Cesar Chan, Roland Here, and Dudley R. Morgan

Historically, in Western Canada, the stabilization of rock slopes and construction of excavations have been achieved using methods such as soldier piles and lagging or construction of cast-in-place concrete retaining walls. In the case of reinforced cast-in-place concrete, there is a requirement for erection of

RepairStructuralUnderground Parking Garage Rehabilitation Using Dry-Mix Shotcrete

Randle Emmrich

RepairStructuralDeterioration and Rehabilitation of Berth Faces in Tidal Zones at the Port of Saint John

Paul Gilbride, Dudley R. Morgan, and Theodore W. Bremner

The Department of Justice (DOJ) Headquarters, 951 Constitution Ave. N.W., Washington, DC, has been undergoing major rehabilitation and renovation. Work started in 2001 and continued into 2002. Gilbane Building Co. is the prime contractor on the site, but there are many subcontractors involved in restoring

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

UndergroundStructuralSoil and Rock Slope Stabilization Using Fiber-Reinforced Shotcrete in North America

Mike Ballou and Matt Niermann

UndergroundStructuralDetermination of Early-Age Compressive Strength of Shotcrete

Roland Here and Dudley R. Morgan

Tere has long been a need for a reliable, simple-to-use means of determining the early-age rate of strength gain in shotcrete.During approximately the first 24 hours after shotcrete has been placed, its compressive strength is typically too low to measure using standard core-extraction and testing

StructuralInternationalShotcrete Meets the Challenge of Huge Water Project in Ecuador

Mary Jane Loevlie and Kristian Loevlie

Shotcrete Meets the Challenge of Huge Water Project in Ecuador replacing traditional œform-and-pour reinforced concrete construction methods with high-production shotcrete, the massive Trasvases Manabi Water Project in Ecuador was finished months ahead of schedule. Contractor Norberto Odebrecht, in conjunction with Shotcrete Technologies, Inc., of Idaho

UndergroundStructuralDesign Guidelines for the Use of FIber-Reinforced Shotcrete in Ground Support

F. Papworth

Developments in Shotcrete in Hobart, Tasmania, Australia in April 2001. One of the outstanding papers presented at the Conference was a paper by Grant, Ratcliffe and Papworth on œDesign Guidelines for the use of SFRS in Ground Support. Frank Papworth was asked to submit an

StructuralDealing with Reinforcing

James Warner

StructuralShotcrete Solution to Tricky Underpinning Problem

Roger W Abbott

A downtown Vancouver excavation and shoring project involving underpinning of two adjacent structures took on a strange twist when it was discovered that the three-level, early 1920s building to the north of the excava-tion had a precariously attached brick wall founded on a rubble footing,