Innovative Concept for Prestressed Pressure Pipeby A. T. Ciolko, Construction Technology Lab Inc, United States,
T. E. Northup, Construction Technology Lab Inc, United States,
Abstract: A new design and manufacturing concept was developed by General Atomics for prestressed pressure pipe. With this new concept, patented in the U.S. and in the major industrialized nations, a cylindrical concrete core is cast against the interior surface of a high-strength sheet steel cylinder. However, instead of achieving prestress by helically wrapping the concrete core/steel cylinder with high-strength steel wire, a commentitious grout is pressure injected into the interface between the concrete core and steel cylinder. The pressurized grout material produces circumferential compressive stress in the concrete core and a circumferential tensile stress in the steel cylinder.
Subject Headings: Prestressing | High-strength steel | Pressure pipes | Cylinders | Grouting | Pipelines | Concrete | Pipe materials
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