Chao, Zhiming (2021) Physical performance of clayey soil geocomposite drainage layer interfaces subjected to environmental loadings. PhD thesis, University of Warwick.

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Abstract

Geocomposite Drainage Layers (GDL) are applied in a broad range of geotechnical and geo-environmental applications, including mining facilities, embankments, landfills, etc., which can substitute traditional methods of placing layers of gravel and graded sand to drain excess water effectively and decrease pore water pressure, improving the stability of engineering projects. For the applications with GDLs installed, their stability is mainly controlled by the mechanical characteristics of GDL-cover soil interfaces. Therefore, the correct evaluation of the mechanical behaviour for GDL-cover soil interfaces is crucial. Additionally, during the service life, the GDL cover systems can experience climatic variations, such as the increase in ambient temperature, consecutive rainfall and drought, etc. to result in obviously elevated temperature, drying-wetting cycles, and thermal cycles on cover soil-GDL interfaces to affect their mechanical properties, which may impact the stability of GDL cover systems.

This thesis quantifies the mechanical behaviour of cover soil-GDL interfaces subjected to environmental factors. In this thesis, a stress and temperature-controlled large direct shear apparatus was established. With use of the apparatus, the impacts of environmental factors, including drying-wetting cycles, thermal cycles, and elevated temperature, on the short-term and creep mechanical characteristics of cover clayey soil-GDL interfaces were quantified.

Item Type:	Thesis (PhD)
Subjects:	S Agriculture > S Agriculture (General) T Technology > TA Engineering (General). Civil engineering (General) T Technology > TC Hydraulic engineering. Ocean engineering T Technology > TD Environmental technology. Sanitary engineering
Library of Congress Subject Headings (LCSH):	Drainage, Clay soils, Soil mechanics, Sanitary landfills
Official Date:	January 2021
Dates:	Date Event January 2021 UNSPECIFIED
Institution:	University of Warwick
Theses Department:	School of Engineering
Thesis Type:	PhD
Publication Status:	Unpublished
Supervisor(s)/Advisor:	Fowmes, Gary John
Sponsors:	China Scholarship Council
Format of File:	pdf
Extent:	xi, 202 leaves : illustrations (some colour)
Language:	eng

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