Numerical modelling of the effect of curing time on the creep behaviour of a chemically stabilised soft soil

This work studies the effect of the curing time on the creep behaviour of a stabilised soft soil, using volumetric and deviatoric creep laws associated with constitutive models. Results of unconfined compressive strength tests for several curing times are used to define the time evolution of the mec...

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Bibliographic Details
Published inComputers and geotechnics Vol. 91; pp. 117 - 130
Main Authors Oliveira, Paulo J. Venda, Correia, António A.S., Lemos, Luís J.L.
Format Journal Article
LanguageEnglish
Published New York Elsevier Ltd 01.11.2017
Elsevier BV
Subjects
Clay
Cold flow
Columns (structural)
Compressive strength
Concrete curing
Constitutive models
Creep
Creep tests
Curing
Curing (processing)
Curing time
Deep mixing columns
Embankment on soft clay
Embankments
Mathematical models
Modelling
Numerical modelling
Soil
Soil chemistry
Soil stabilization
Soils
Solifluction
Stabilised soft soil
Curing time
Embankment on soft clay
Creep
Deep mixing columns
Numerical modelling
Stabilised soft soil
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Summary:This work studies the effect of the curing time on the creep behaviour of a stabilised soft soil, using volumetric and deviatoric creep laws associated with constitutive models. Results of unconfined compressive strength tests for several curing times are used to define the time evolution of the mechanical and creep properties. The models/creep laws are validated by oedometer and triaxial creep tests, for 28 and 90days of curing. The long-term behaviour of an embankment built on a soft soil reinforced with deep mixing columns shows that the effect of curing time decreases the settlement and increases the improvement factor.
ISSN:0266-352X
1873-7633
DOI:10.1016/j.compgeo.2017.07.007