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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/10237

Title: Soil-geosynthetic interaction: interface behaviour
Authors: Dixon, Neil
Keywords: Interface shear strength
Direct shear apparatus
Specification
Repeatability
Characteristic values
Issue Date: 2010
Publisher: International Geosynthetics Society (© Neil Dixon)
Citation: DIXON, N., 2010. Soil-geosynthetic interaction: interface behaviour. Palmeira, E.M. ... et al (eds.). Proceedings, 9th International Conference on Geosynthetics, Guaruja Brazil, May 23rd-27th, pp.563-582.
Abstract: Knowledge of soil vs. geosynthetic and geosynthetic vs. geosynthetic interface shear behaviour is of fundamental importance to designers. This paper considers factors influencing measured behaviour, summarizes methods of measurement including specifications, presents data that quantifies variability, details methods for obtaining characteristic interface shear strength parameters for use in design and defines key questions to be answered by engineers. It is shown that the design of direct shear apparatus is the main reason for observed large variability of measured interface strengths from inter-laboratory comparison testing pro-grams. The need to carry out repeat tests at each normal stress is established. The use of global databases of measured interface strengths to inform selection of strength parameters is discouraged. A recommendation is given to use the results of repeatability testing programs to support calculation of characteristic interface strength parameters. Using the example of landfill lining design, guidance is provided on selection of strength parameters in conjunction with relevant factors of safety, consequences of failure, selection of the controlling interface and minimizing interface displacements.
Description: This is a conference paper.
Version: Accepted for publication
URI: https://dspace.lboro.ac.uk/2134/10237
Publisher Link: http://www.geosyntheticssociety.org/
Appears in Collections:Conference Papers (Civil and Building Engineering)

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