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The short-term and creep mechanical behaviour of clayey soil-deocomposite drainage layer interfaces subjected to environmental loadings
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Chao, Zhiming and Fowmes, Gary J. (2022) The short-term and creep mechanical behaviour of clayey soil-deocomposite drainage layer interfaces subjected to environmental loadings. Geotextiles and Geomembranes, 50 (2). pp. 238-248. doi:10.1016/j.geotexmem.2021.10.004 ISSN 0266-1144.
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WRAP-short-term-creep-mechanical-clayey-soil-geocomposite-drainage-environmental-loadings-2021.pdf - Accepted Version - Requires a PDF viewer. Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0. Download (1072Kb) | Preview |
Official URL: https://doi.org/10.1016/j.geotexmem.2021.10.004
Abstract
In this paper, to investigate the impact of environmental loadings on the short-term and creep mechanical characteristics of different types of clayey soil-Geocomposite Drainage Layers (GDL) interfaces, a series of rapid loading and creep shear tests were conducted on Mercia Mudstone Clay-GDL interfaces and Kaolin Clay-GDL interfaces subjected to drying-wetting cycles, thermal cycles and elevated temperature, etc, using a bespoke temperature and stress-controlled large direct shear apparatus. The experimental results indicate that, compared with the original specimens, the interfaces subjected to drying-wetting cycles, thermal cycles and elevated temperature, have lower peak shear strength and creep shear resistance. For example, under 25 kPa normal stress, the peak shear strength of original Mercia Mudstone Clay-GDL interfaces and Kaolin Clay-GDL interfaces falls by 11.91% and 10.11%, respectively, when subjected to 1 drying-wetting cycle. This can be ascribed to the weakening of interlocking effects and skin friction between soil and GDL caused by the softening of drainage core and geotextile fibres of GDL. The peak shear strength of clayey soil-GDL interfaces subjected to one drying-wetting cycle is lower than that subjected to one thermal cycle because of the reduction in the peak shear strength of clayey soil above GDL during drying-wetting cycles. The impact of drying alone on the decrease in the peak shear strength of clayey soil-GDL interfaces during drying cycles with heating is small, and the main influence factor is the elevated temperature.
Item Type: | Journal Article | ||||||||
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Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | ||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||
Library of Congress Subject Headings (LCSH): | Geosynthetics, Environmental geotechnology, Soil stabilization -- Materials, Materials -- Creep | ||||||||
Journal or Publication Title: | Geotextiles and Geomembranes | ||||||||
Publisher: | Elsevier | ||||||||
ISSN: | 0266-1144 | ||||||||
Official Date: | April 2022 | ||||||||
Dates: |
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Volume: | 50 | ||||||||
Number: | 2 | ||||||||
Page Range: | pp. 238-248 | ||||||||
DOI: | 10.1016/j.geotexmem.2021.10.004 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Date of first compliant deposit: | 9 November 2021 | ||||||||
Date of first compliant Open Access: | 20 November 2022 | ||||||||
RIOXX Funder/Project Grant: |
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