Title

Design Guidelines for Polyethylene Pipe Interface Shear Resistance

Document Type

Article

Publication Date

6-2009

Publication Source

Journal of Geotechnical and Geoenvironmental Engineering

Abstract

Polyethylene pipes are commonly used in pipeline systems. Current methods used to determine the pipe pullout capacity do not consider the effects of diameter changes and cyclic movements that the pipelines may experience. Laboratory tests were performed to study the interface shearing resistance of polyethylene pipes under varying conditions. The tests were performed in a temperature-controlled room, where properties were investigated for thermal variations expected in the field. Two types of tests were performed: pull/push tests and cyclic tests. Test results indicated that reductions in pipe diameter affect the interface shear resistance that develops between the pipe and soil. As the pipe diameter gets smaller, the normal contact stresses at the interface decreases, causing a reduction in the interface shearing resistance directly proportional to the normal stress changes. Cyclic pipe movements also cause significant reduction in pipe pullout resistance. The test results indicated that the polyethylene pipe interface shear resistance can be significantly lower than the one determined using the current methods. This paper presents the test results, findings, and design recommendations for the pullout resistance of buried polyethylene pipes.

Inclusive pages

809-818

ISBN/ISSN

1090-0241

Comments

Permission documentation is on file.

Publisher

American Society of Civil Engineers

Volume

135

Issue

6

Peer Reviewed

yes