Swelling and shrinking soils

Jones, Lee; Banks, Vanessa; Jefferson, Ian. 2020 Swelling and shrinking soils. In: Giles, D.P.; Griffiths, J.S., (eds.) Geological hazards in the UK: their occurrence, monitoring and mitigation engineering group working party report. London, UK, Geological Society of London, 223-242. (Engineering Geology Special Publications, 29, 29).

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Swelling and shrinking soils are soils that can experience large changes in volume due to changes in water content. This may be due to seasonal changes in moisture content, local site changes such as leakage from water supply pipes or drains, changes to surface drainage and landscaping, or following the planting, removal or severe pruning of trees or hedges. These soils represent a significant hazard to structural engineers across the world due to their shrink–swell behaviour, with the cost of mitigation alone running into several billion pounds annually. These soils usually contain some form of clay mineral, such as smectite or vermiculite, and can be found in humid and arid/semi-arid environments where their expansive nature can cause significant damage to properties and infrastructure. This chapter discusses the properties and costs associated with shrink–swell soils, their formation and distribution throughout the UK and the rest of the world, and their geological and geotechnical characterization. It also considers the mechanisms of shrink-swell soils and their behaviour, reviewing strategies for managing them in an engineering context, before finally outlining the problem of trees and shrink–swell soils.

Item Type: Publication - Book Section
Digital Object Identifier (DOI):
ISSN: 0267-9914
Date made live: 11 Jun 2020 14:32 +0 (UTC)

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