Modelling of the effect of scale on the compressibility parameters of fine-grained soils

The effect of sample scale represents a challenge when obtaining engineering parameters in the laboratory compared to those obtained in the field. This study aimed at contributing to existing knowledge numerically using the finite element software PLAXIS 2D. The investigations were analysed in terms...

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Published inGeomechanics and geoengineering : an international journal Vol. 14; no. 4; pp. 262 - 270
Main Authors Rosine Larissa, Tepondjou Nguedia, Toma Sabbagh, Tahsin, Uzomah, Vincent C.
Format Journal Article
LanguageEnglish
Published Taylor & Francis 02.10.2019
Subjects
Compressibility
fine-grained soils
PLAXIS 2D
sample scale
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Summary:The effect of sample scale represents a challenge when obtaining engineering parameters in the laboratory compared to those obtained in the field. This study aimed at contributing to existing knowledge numerically using the finite element software PLAXIS 2D. The investigations were analysed in terms of height scale (HS) and diameter scale (DS) through a series of laboratory tests. Its effect on compressibility parameters such as coefficient of consolidation (c v ) was noted experimentally and showed that the sample scale greatly influences soil parameters most particularly at DS. The soil behaviour was found to be dependent on both DS and HS with a correlation factor of 0.650 and 0.062, respectively. The experimental data were validated in PLAXIS and a new proposed model was developed in PLAXIS 2D under the DS. The new proposed model developed was found to show no significant difference with the laboratory data.
ISSN:1748-6025
1748-6033
DOI:10.1080/17486025.2019.1597282