Mobilization Distance for Upheaval Buckling of Shallowly Buried Pipelines
Publication: Journal of Pipeline Systems Engineering and Practice
Volume 3, Issue 4
Abstract
Buried pipelines may be subject to upheaval buckling because of thermally induced compressive stresses. As the buckling load of a strut decreases with increasing out of straightness, not only the maximum available resistance from the soil cover, but also the movement of the pipeline required to mobilize this are important factors in design. This paper will describe the results of 15 full-scale laboratory tests that have been carried out on pipeline uplift in both sandy and rocky backfills. The cover to diameter ratio ranged from 0.1 to 6. The results show that mobilization distance exhibits a linear relationship with ratio and that the postpeak uplift force-displacement response can be accurately modeled using existing models. A tentative design approach is suggested; the maximum available uplift resistance may be reliably predicted from the postpeak response, and the mobilization distance may be predicted using the relationships described in this paper.
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Acknowledgments
The authors would like to thank KW Limited for its generous financial and informational support towards the completion of this research. The first author would also like to thank Trinity College, University of Cambridge for funding his Ph.D. research on this subject.
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Information
Published In
Journal of Pipeline Systems Engineering and Practice
Volume 3 • Issue 4 • November 2012
Pages: 106 - 114
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Apr 26, 2011
Accepted: Nov 21, 2011
Published online: Nov 23, 2011
Published in print: Nov 1, 2012
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