Quality Assurance Method for Assessment of Stiffness of Pipeline Bedding Material
Publication: Journal of Materials in Civil Engineering
Volume 28, Issue 4
Abstract
An innovative quality assurance method is used to assess the stiffness of the bedding material to a water pipeline located in Texas. The method used is a combination of spectral analysis of surface waves technique (SASW) and geostatistics. SASW tests were conducted to measure the stiffness of pipeline bedding material at 15 sections along the pipeline after different curing periods of 1, 3, 7, 14, and 28 days. The stiffness measurements from SASW tests are used in geostatistical analysis to determine stiffness properties at untested locations and map the variation of stiffness values along the pipeline. The SASW measurements indicated a significant increase in mean stiffness value of bedding material from 267.5 MPa on day 1 to 442 MPa after a 28-day curing period. The geostatistical analysis predicted and mapped the stiffness of bedding material over the entire pipeline by incorporating the variability present in the known stiffness measurements. This research highlights the adaptability of geostatistics and in situ measurements in assessing the quality of the pipeline bedding material.
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Acknowledgments
This research was conducted in cooperation with the Tarrant Regional Water District (TRWD). The authors would like to acknowledge Shelly Hattan of TRWD and Matt Gaughan of IPL team for their assistance with various research activities related to testing and coordination among various groups and research teams.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 28 • Issue 4 • April 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Apr 8, 2015
Accepted: Jul 15, 2015
Published online: Oct 6, 2015
Discussion open until: Mar 6, 2016
Published in print: Apr 1, 2016
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