Pipe-Lining A Pipeline

After boring 8,500 ft. the TBM moves forward on guiderails into the shaft for removal by crane.

Sizing of the segments. Die in an open position before the preformed segment is placed in the die. Note the stop (nose) of the die in the middle.

Thin core prestressed concrete cylinder pipe is now lining the inside of a major water supply tunnel in Alaska. Occasionally found in rock tunnels or buried pipelines, large diameter, thin core prestressed concrete pipe has not been used 80 to 200 ft underground in a soil tunnel before.

In 1979, a Metropolitan Anchorage Urban study on the water supply conducted by the Corps of Engineers and the city of Anchorage came out warning of a 25 million gal per day water shortage and contaminiated drinking water by the end of the century.

View Tunnel Lining Brochure

Steel Selection and Pipe Fabrication Challenges of a 120-inch-Diameter High-Strength-Steel Tunnel Liner Project

Abstract: The 120-inch-diameter steel liner of the tunnel, which connects the Olivenhain Reservoir and Lake Hodges in San Diego County, CA, was part of a 40-megawatt pumped storage project. The liner was designed for a maximum internal pressure in excess of 450 psi, and required high-strength steel and improved fracture toughness due to cyclic high transient pressures resulting from frequent start ups of the generator and pumps. Steel material and fabrication procedures had to conform to the requirements of ASME Section VIII Division 2 and ASCE Manuals and Reports on Engineering Practice No.79, Steel Penstocks.

Pipelines 2010: Climbing New Peaks to Infrastructure Reliability—Renew, Rehab, and Reinvest © 2010 ASCE