Enhancement in the interface shear resistance achieved by a novel geogrid with in-plane drainage

Brendan C. O'Kelly, Patrick J. Naughton

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The enhancement in the interface shear strength achieved in the short-term by a novel geogrid, which combines both reinforcement and in-plane drainage functions, was studied. Marginal fill material (wet gravelly clay) was standard Proctor compacted to achieve 92% of its maximum dry unit weight and tested in the large shearbox apparatus under consolidated-undrained conditions. Overall, the interface shear resistance (τg-g) values mobilized for the novel geogrid were similar to the undrained shear strength of the test soil itself. In contrast, the τg-g values mobilized for a conventional geogrid, which had similar physical and tensile strength properties, were between only 82 and 85% of the undrained shear strength of the test soil. The benefit is that the increase in the interface friction angle (achieved by in-place drainage along the novel geogrid) will facilitate the use of some marginal fills, which may already be readily available onsite, in the construction of earth structures. Copyright ASCE 2008.

Original languageEnglish
Title of host publicationProceedings of session of GeoCongress 2008 - GeoCongress 2008
Subtitle of host publicationGeosustainability and Geohazard Mitigation, GSP 178
Pages740-747
Number of pages8
Edition178
DOIs
Publication statusPublished - 2008
EventGeoCongress 2008: Geosustainability and Geohazard Mitigation - New Orleans, LA, United States
Duration: 9 Mar 200812 Mar 2008

Publication series

NameGeotechnical Special Publication
Number178
ISSN (Print)0895-0563

Conference

ConferenceGeoCongress 2008: Geosustainability and Geohazard Mitigation
Country/TerritoryUnited States
CityNew Orleans, LA
Period9/03/0812/03/08

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