Shotcrete

Type of STAY-FORM^® Application
Mike Cox, the Project Engineer for Drill Tech, used STAY-FORM^® as a backstop for this 1100 ft. multi- use tunnel project (pedestrian, biking and light rail). They shot the STAY-FORM^® (70,000 sq. ft.) With hilti pins to the structural steel beams which were 4ft. Oc. The shotcrete was 6” – 12” thick with steel fibers.

Project
Cal Park Hill Tunnel Rehab & Appurtenances

Location
Marin County Dept. Of Public Works
San Rafael, CA

Engineer
Earth Tech / URS
Oakland, CA

concrete wall forming

General Contractor
Drill Tech Drilling & Shoring, Inc.
Antioch, CA

Stay-form was used as a backstop for the shotcrete applications. Stay-form was attached on the outside of the tunnel to truss girders and after an application of welded wire mesh prior to the application of the shotcrete.

Location
Pittsburgh, PA

General Contractor
Mosites Const. Comp. Pittsburgh, PA

Engineers
Sauer Design and Consulting Comp. (Herndon, VA)
ICF Kaiser Engineers, Inc. (Pittsburgh, PA)
Michael Baker Jr., Inc. (Coraoplis, PA)

Stay-form Dealer
Stay-form Dealer: George Wilson & Co.  Pittsburgh, PA

Type of Shotform Application
Project manager Victor Chaisson used approximately 170,000sf of Shotform in rehabilitating this old railroad tunnel (3300′ long x 20′ high x 16′ wide). Six men using ramset fasteners (1 3/4″ & 2 1/2″) installed roughly 750 sheets of Shotform a day (approximately ten days for total installation). The main tunnel cross section consisted of the existing tunnel lining, j-drain, Shotform, #4 rebar 12″ on center, welded wire mesh and a minimum 2 1/2″ Shotcrete liner.

Project
Big Savage Mountain Tunnel
Pittsburgh to Washington DC – Rail to Trail

Location
Somerset County, PA
Frostburg, MD

Engineer
Gannett Fleming, Inc.
Camp Hill, PA

AWK Consulting Engineers, Inc.
Pittsburgh, Pennsylvania

General Contractor
Advanced Construction Techniques
Maple, ON L6A 1R7 Canada

Shotcrete Backstop for Water Flume Ride

Stay-form used to form curved wall that simulates natural stone walls.

Stay-form was utilized in conjunction with rebar supports to form the rough shape of the walls of this water flume ride. In many areas of this project Stay-form actually formed the outside and inside walls before being covered with concrete. To the right is a view of the backside of the form. Note the degree of coverage and embedment of the concrete in the Stay-form after the shotcrete application.

Stay-form was applied to a rebar grid or frame and shotcrete was applied to both sides of the Stay-form to achieve a total desired thickness.

Wichita, KS

• GC: C-TEC York, NE
• Engineer: Nohr Engineering Co. Yankton, SD

Type of Shotcrete Application
Shotcrete

Location
Las Vegas, NV

Location
Oakdale Elementary School
Charlotte, NC

Architect
Shuller, Ferris, Lindstrom & Associates
Charlotte, NC

Engineer
Mulkey Engineers & Consultants
Charlotte, NC

General Contractor
LeChase Construction Services, LLC
Huntersville, NC

Concrete Contractor
Southern Concrete Services
Rock Hill, NC