Soil-Structure Interaction and Imperfect Trench Installations for Deeply Buried Concrete Pipes
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 133, Issue 3
Abstract
The imperfect trench installation method is used to reduce earth pressure on buried concrete pipes. Few quantitative refinements to the imperfect trench installation method, however, have been added since the fundamental mechanics of the reverse arching action were proposed by Marston and Spangler. There have been limited research results published regarding, primarily, qualitative aspects of earth load reduction for imperfect trench conditions. This paper identifies variables that significantly affect earth loads, as well as the effects of bedding and sidefill treatments. An optimum geometry for imperfect trench installations with regard to a soft material zone is presented to maximize the earth load reduction effects. The optimization process was based on parametric studies of the geometry and location of the soft zone, bedding, and sidefill treatments to reduce earth pressures. Predictor equations for earth load reduction rates were formulated incorporating the optimum geometry for the soft zone and bedding and sidefill treatments.
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Acknowledgments
Funding for this research project was provided by Alabama Department of Transportation under Project No. 930-592 entitled, “Bedding and Fill Heights for Concrete Roadway Pipe and Box Culverts.” This financial support is gratefully acknowledged.
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Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 133 • Issue 3 • March 2007
Pages: 277 - 285
Copyright
© 2007 ASCE.
History
Received: Oct 3, 2005
Accepted: Sep 28, 2006
Published online: Mar 1, 2007
Published in print: Mar 2007
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