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Soil-water retention curve prediction for compacted London Clay subjected to moisture cycles [dataset] Open Access

The evolution of the hydraulic properties of London Clay when compacted at a range of initial conditions (density and water content) was investigated. The soil-water retention curve (SWRC) is observed to change as the soil is subjected to cycles of wetting and drying. A new method is presented for predicting these changes in the soil-water retention curves (SWRCs) based on the starting conditions for each cycle, independently of the past hydraulic history. The method is based on relationships between the degree of saturation before drying (Sr,i), which includes the effect of void ratio and soil fabric, and key parameters that characterize the shape of SWRCs (air-entry value and slope of the transition zone). The relationship between the Sr,i and the air-entry value (or yield point, YP), and the relationship between the YP and the slope of the transition zone of the SWRC were established for the large experimental data set of two types of London clay of high and very high plasticity. The fitting parameters of a bi-linear SWRC model were estimated and used to constrain the fitting parameters of the van Genuchten model. As the SWRC of compacted clay continuously changes with progressive moisture cycles, this model allows the prediction of this evolution for the modelling of earthworks over the years, when subject to changing climatic conditions, without the need for an extensive experimental program.

Descriptions

Resource type

Dataset

Contributors

Creator: Dias, Ana Sofia ¹
Data collector: Dias, Ana Sofia ¹
Data curator: Dias, Ana Sofia ¹
Editor: Dias, Ana Sofia ¹
Contact person: Hughes, Paul ¹
Contact person: Toll, David ¹
Editor: Toll, David ¹

¹ Durham University, UK

Funder

Engineering and Physical Sciences Research Council

Research methods

Other description

Keyword

Unsaturated soils
Soil-water retention curve
Compacted soil
High plasticity clay

Subject

Soil moisture
Clay soils

Location

London, England, United Kingdom

Language

Cited in

Identifier

ark:/32150/r1zc77sq19n
doi:10.15128/r1zc77sq19n

Rights

Creative Commons Attribution 4.0 International (CC BY)

Publisher

Durham University

Date Created

File Details

Depositor

A.S. Dias

Date Uploaded

21 November 2022, 16:11:43

Date Modified

21 November 2023, 09:11:29

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Characterization

File format: vnd.ms-excel (Microsoft Excel 2007+, OpenDocument Text)

Mime type: application/vnd.ms-excel

File size: 3898747

Last modified: 2023:11:20 16:47:21+00:00

Filename: repository paper 2.xlsx

Original checksum: 3edea4bfac051a6bcb5e95fdd45a7e70