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Bearing ratio of a fine soil reinforced with geosynthetics: influence of the reinforcement type and the soil water content

Bearing ratio of a fine soil reinforced with geosynthetics: influence of the reinforcement type and the soil water content
Bearing ratio of a fine soil reinforced with geosynthetics: influence of the reinforcement type and the soil water content
This paper reports an investigation on the effects of reinforcing a fine soil with three different geosynthetic solutions and their behaviour under loading. The effectiveness of the reinforcement was investigated through California Bearing Ratio, CBR, tests. The reinforcement solutions tested were: geogrid (GGR), geocomposite (GCR), association of geogrid and geotextile (GGR + GTX). The response of the unreinforced fine soil was compared to those of the same soil with one layer of reinforcement. The influence of the initial water content of the soil on the bearing capacity was analysed using five different values (11.9%; 13.9% (optimum); 15%; 17% and 19%). Including a layer of reinforcement improved the bearing capacity ratio and the stiffness of the samples. The best improvement in bearing capacity was found for GGR, followed by GGR + GTX and then GCR, and can be explained by the differences in stiffness and structure of the reinforcements. The mobilisation of the reinforcement depended on the type of reinforcement, the initial water content of the sample and the penetration induced to the sample. The soil initial water content affected the response significantly. Higher initial water contents lead to lower CBR values, for both unreinforced and reinforced samples. However, the effectiveness of each reinforcement varied with the initial water content; for GGR and GGR + GTX an initial water content of 17% lead to the higher bearing capacity ratio, while for GCR this occurred for the lowest value of the initial water content considered (11.9%).
884-891
Carlos, D.M.
3486f366-4c39-4a9e-8d34-911fd756a616
Pinho-Lopes, M.
b7e5f7d6-90d8-48cc-b991-0495445fcea4
Lopes, M.L.
dca0c06e-aaa8-47df-923f-5fa9973552ba
Carlos, D.M.
3486f366-4c39-4a9e-8d34-911fd756a616
Pinho-Lopes, M.
b7e5f7d6-90d8-48cc-b991-0495445fcea4
Lopes, M.L.
dca0c06e-aaa8-47df-923f-5fa9973552ba

Carlos, D.M., Pinho-Lopes, M. and Lopes, M.L. (2016) Bearing ratio of a fine soil reinforced with geosynthetics: influence of the reinforcement type and the soil water content. EuroGeo6 - 6th European Geosynthetics Conference, Slovenia. 25 - 28 Sep 2016. pp. 884-891 .

Record type: Conference or Workshop Item (Paper)

Abstract

This paper reports an investigation on the effects of reinforcing a fine soil with three different geosynthetic solutions and their behaviour under loading. The effectiveness of the reinforcement was investigated through California Bearing Ratio, CBR, tests. The reinforcement solutions tested were: geogrid (GGR), geocomposite (GCR), association of geogrid and geotextile (GGR + GTX). The response of the unreinforced fine soil was compared to those of the same soil with one layer of reinforcement. The influence of the initial water content of the soil on the bearing capacity was analysed using five different values (11.9%; 13.9% (optimum); 15%; 17% and 19%). Including a layer of reinforcement improved the bearing capacity ratio and the stiffness of the samples. The best improvement in bearing capacity was found for GGR, followed by GGR + GTX and then GCR, and can be explained by the differences in stiffness and structure of the reinforcements. The mobilisation of the reinforcement depended on the type of reinforcement, the initial water content of the sample and the penetration induced to the sample. The soil initial water content affected the response significantly. Higher initial water contents lead to lower CBR values, for both unreinforced and reinforced samples. However, the effectiveness of each reinforcement varied with the initial water content; for GGR and GGR + GTX an initial water content of 17% lead to the higher bearing capacity ratio, while for GCR this occurred for the lowest value of the initial water content considered (11.9%).

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More information

Accepted/In Press date: 25 July 2016
e-pub ahead of print date: 27 September 2016
Venue - Dates: EuroGeo6 - 6th European Geosynthetics Conference, Slovenia, 2016-09-25 - 2016-09-28
Organisations: Infrastructure Group

Identifiers

Local EPrints ID: 401301
URI: https://eprints.soton.ac.uk/id/eprint/401301
PURE UUID: a99f91eb-2e2d-427e-b3a6-440ded55cc65
ORCID for M. Pinho-Lopes: ORCID iD orcid.org/0000-0003-0808-6307

Catalogue record

Date deposited: 17 Oct 2016 08:49
Last modified: 07 Jun 2019 00:31

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