Scotland_jgein.15.00049.pdf (1.53 MB)

Modelling deformation during the construction of wrapped geogrid reinforced structures

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journal contribution
posted on 10.12.2015, 13:37 by Ian Scotland, Neil Dixon, Matthew Frost, Gary Fowmes, G. Horgan
Although geogrids and geotextiles have been successfully used for over a quarter of a century to reinforce soil, there are currently no commonly agreed analytical methods to model their deformation behaviour. The Serviceability Limit State is becoming an ever more important design consideration, as structures are built with increasingly tighter tolerances. While there are many deformation databases and design charts available, providing information and guidance on the sensitivity to certain design variables, these are largely focused on facets such as height, shear strength and geogrid ultimate strength and do not consider construction method. Following a review of existing analytical and empirical guidance, this paper presents numerical modelling derived guidance for flexible faced Geogrid Reinforced Structures constructed using cohesionless fill that incorporates installation methods. The modelling approach is validated against measured results from three varied case studies, before analysing the changes in deformation distribution resulting from two different construction methods (layer by layer and full height construction). For the conditions analysed, including height of the structure, the lateral deformation resulting from layer by layer construction, was shown to be consistently greater, than for full height construction. In contrast, an analysis of post-construction deformation, for each of the construction methods, found full height construction to be more sensitive to post-construction loading, for the conditions considered. For low wall height structures constructed using the layer by layer method, <5 metres, this study indicates that horizontal face deformations are underestimated by current guidance.

Funding

The authors wish to thank the EPSRC for providing funding through the Centre for Innovative Con-struction Engineering (CICE) at Loughborough University and Huesker (UK) Limited for funding and supporting this research project.

History

School

  • Architecture, Building and Civil Engineering

Published in

Geosynthetics International

Citation

SCOTLAND, I. ...et al., 2016. Modelling deformation during the construction of wrapped geogrid reinforced structures. Geosynthetics International, 23 (3), pp. 219-232.

Publisher

© Thomas Telford (ICE Publishing)

Version

NA (Not Applicable or Unknown)

Publication date

2016

Notes

Permission is granted by ICE Publishing to print one copy for personal use. Any other use of these PDF files is subject to reprint fees.

ISSN

1072-6349

eISSN

1751-7613

Language

en

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