Structural Portal

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,

StructuralShotcrete Retrofil of a Mechanically Stabilized Earth Wall

Roland Heere, Dudley R Morgan, Stephen Jungaro

The Municipality of Maple Ridge in British Columbia, Canada, commissioned a spe-cialty contractor to build a 9 m (29.5 ft)diameter culvert, incorporated in a mechanically stabilized earth (MSE) wall, to provide a street crossing for a stream. The culvert had been partly sunk into the

StructuralSetting the Standard with Soil Nail Technologies

Dino Kartofi lis and Gary Corwin

Nicholson Construction Company was awarded the con- tract to build a reinforced shotcrete soil nail retaining wall along State Route 9900 in Blair County, Penn-sylvania (U.S.). The 330-ft-(100-m)-long, 35-foot-(10.7-m)-high permanent retaining wall was cut into the hillside to provide an access route to the new

StructuralSoil Nailing is Designed to Fit

Marcus H. von der Hofen

Soil nailing has become a popular method to shore exca-vations and to build retaining walls due to its versatility and cost effectiveness. Generally broken into two cat-egories, temporary and permanent ground retention systems, soil nailing has evolved into many variations. A range of dif-ferent means

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.

UndergroundStructuralInternationalShotcrete for Underground Support

Dr. Rusty Morgan

In November 1999 I had the opportunity to attend the Third International Symposium on Sprayed Concrete for Underground Support.

StructuralSlope Reinforcement using Shotcrete in Arizona

American Shotcrete Association

With more than 7,000 cubic yards (5,350 m3) of shotcrete to be used for slope reinforcement in the Mesa­Payson Highway expansion in Arizona, it may be the biggest shotcrete application in the country. The project consists of shotcreting thirteen freshly-cut mountainsides in the Kitty Joe

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

StructuralInternationalApplication and Testing of Shotcrete

Wolfgang Kusterle

In 1989, the Austrian Concrete Society pub-lished a Guideline on Shotcrete that subse-quently served as a reference work and a contractual basis for shotcrete works in tunnel con-struction in Austria and abroad. Other standards,such as DIN 18551, focused more strongly on shotcrete for concrete repair