Parametric Model for Conceptual Cost Estimation of Concrete Bridge Foundations
Publication: Journal of Infrastructure Systems
Volume 17, Issue 2
Abstract
Motorway bridges constitute a major part of modern transportation infrastructure networks. Interestingly, although foundations substantially influence the bridge construction cost, few studies have focused on predesign cost estimates. This paper presents a conceptual cost-estimate model for bridge foundations that involves three stages: the selection of the foundation system, the estimation of the material quantities, and the estimation of the foundation cost. It describes an easy-to-use ground classification method, which combined with a rule-based system, leads to the choice of the foundation system. This paper also describes the development of prediction models for the material quantities of different types of foundations. The significant independent variables were identified by the experts in interview sessions. Despite its drawbacks, the stepwise regression methodology was applied to see whether the results are consistent with the experts’ opinion. The major assumptions underlying the correct application of the regression methodology were tested, and the necessary adjustments were made. The proposed conceptual cost-estimating methodology provides fast and reliable results that can be very useful in the early stages of a project.
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Acknowledgments
The authors would like to acknowledge the help provided by Dr. Marinos Skempas, C. Eng., in the classification of the ground conditions of each bridge.
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Information & Authors
Information
Published In
Journal of Infrastructure Systems
Volume 17 • Issue 2 • June 2011
Pages: 66 - 74
Copyright
© 2011 American Society of Civil Engineers.
History
Received: May 23, 2009
Accepted: Jul 28, 2010
Published online: Aug 31, 2010
Published in print: Jun 1, 2011
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