Field Deflection-Measurement Techniques and Finite-Element Simulation for Large-Diameter Steel Pipes with Controlled Low-Strength Material
Publication: Journal of Pipeline Systems Engineering and Practice
Volume 8, Issue 4
Abstract
Deflection measurements and finite-element simulation were conducted for buried steel pipes that had been installed using a staged construction technique. The pipes were mortar lined, with a 2,743-mm (108-in.) internal diameter, and the backfill material consisted of controlled low-strength material (CLSM) and compacted native soil. The section analyzed in this paper was part of a 241-km (150-mi) Tarrant Regional Water District (TRWD) project that will be used to transfer water from a reservoir in Kennedale, Texas, to an outlet in Arlington, Texas. Three measurement techniques were adopted and compared for measuring the pipe deflection during the construction procedure: a published procedure, a photo laser profiler, and a video laser profiler. The behavior of the pipe tested was simulated with the finite-element analysis (FEA) method. Material tests, based on established standards, were conducted to develop an initial material law for the CLSM. Material, geometry, and contact nonlinearities were used to simulate the actual behavior of the system. A uniform thermal load was applied to simulate stress-induced compaction at every soil layer. Finally, the deflection, calculated with FEA, was compared with the results from the field measurements. From this study, it is concluded that the FEA successfully simulated the staged construction method. Moreover, the laser profiler is recommended rather than the published method because those results were significantly closer to the actual deflection.
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Acknowledgments
University of Texas at Arlington gratefully acknowledges that the Water Research Foundation and Tarrant Regional Water District are Co-funders of certain technical information upon which this publication manuscript is based. University of Texas at Arlington thanks the Water Research Foundation and Tarrant Regional Water District for their financial, technical, and administrative assistance in funding the project through which this information was discovered.
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Information & Authors
Information
Published In
Journal of Pipeline Systems Engineering and Practice
Volume 8 • Issue 4 • November 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Sep 3, 2015
Accepted: Nov 3, 2016
Published online: Apr 20, 2017
Discussion open until: Sep 20, 2017
Published in print: Nov 1, 2017
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