Design Method for Geogrid-Reinforced Unpaved Roads. I. Development of Design Method
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VIEW THE REPLYPublication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 130, Issue 8
Abstract
A theoretically based design method for the thickness of the base course of unpaved roads is developed in this paper, which considers distribution of stress, strength of base course material, interlock between geosynthetic and base course material, and geosynthetic stiffness in addition to the conditions considered in earlier methods: traffic volume, wheel loads, tire pressure, subgrade strength, rut depth, and influence of the presence of a reinforcing geosynthetic (geotextile or geogrid) on the failure mode of the unpaved road or area. In this method, the required base course thickness for a reinforced unpaved road is calculated using a unique equation, whereas more than one equation was needed with earlier methods. This design method was developed for geogrid-reinforced unpaved roads. However, it can be used for geotextile-reinforced unpaved roads and for unreinforced roads with appropriate values of relevant parameters. The calibration of this design method using data from field wheel load tests and laboratory cyclic plate loading tests on unreinforced and reinforced base courses is presented in the companion paper by the authors.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 130 • Issue 8 • August 2004
Pages: 775 - 786
Copyright
Copyright © 2004 American Society of Civil Engineers.
History
Received: Mar 27, 2003
Accepted: Oct 1, 2003
Published online: Jul 15, 2004
Published in print: Aug 2004
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