Impact of Repeat Overweight Truck Traffic on Buried Utility Facilities
Publication: Journal of Performance of Constructed Facilities
Volume 28, Issue 4
Abstract
Increasing overweight truck traffic, as evident by a rapid increase of permits issued for such traffic in Texas, tends to accelerate the deterioration of pavement structural integrity. However, it is less known to what degree buried utility facilities along and across the right-of-way are affected by these overweight loads, especially if these facilities are aged or placed under an exception to the Texas Utility Accommodation Rules (UAR). In this study, researchers evaluated the damage potential of buried pipe subjected to repeat overweight traffic loads. Based on a review of technical design and engineering requirements for utility accommodation in Texas, a large-scale laboratory test was conducted to investigate fatigue behavior of polyvinyl chloride (PVC) and concrete pipe. The result of both static and fatigue load tests indicated that pipe deformation in terms of vertical diameter reduction was less than 5% of pipe diameter, the maximum allowable value. However, fatigue damage was observed for the concrete pipe even though the deformation level was very minimal. A sensitivity analysis based on the finite-element method was conducted to validate the findings of the laboratory test. The study concludes that the current UAR appear adequate with respect to the likelihood of fatigue damage to buried pipes attributable to repeat overweight loads.
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Acknowledgments
The research presented in this paper was part of a project sponsored by the Texas Department of Transportation. The authors gratefully acknowledge the support and valuable discussions of the Texas DOT project committee members.
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© 2014 American Society of Civil Engineers.
History
Received: Sep 19, 2012
Accepted: Mar 4, 2013
Published online: Mar 6, 2013
Published in print: Aug 1, 2014
Discussion open until: Oct 9, 2014
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