Principles of physical modelling of unsaturated soils

Physical modelling of freezing and thawing of unsaturated soils

Géotechnique ◽

10.1680/jgeot.15.p.098 ◽

2017 ◽

Vol 67 (2) ◽

pp. 106-126 ◽

Cited By ~ 8

Author(s):

B. Caicedo

Keyword(s):

Unsaturated Soils ◽

Physical Modelling ◽

Freezing And Thawing

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Theoretical modelling of retention curve for Livet-Gavet loam

E3S Web of Conferences ◽

10.1051/e3sconf/202019502015 ◽

2020 ◽

Vol 195 ◽

pp. 02015

Author(s):

Jacques Monnet ◽

Luc Boutonnier ◽

Said Taïbi ◽

Dino Mahmutovic ◽

Denis Branque

Keyword(s):

Unsaturated Soils ◽

Sandy Loam ◽

Direct Determination ◽

Physical Modelling ◽

Adsorbed Water ◽

Theoretical Modelling ◽

Physical Parameters ◽

Retention Curve ◽

Uniform Model

Different approaches have been used for modeling retention curves. The experimental correlation was first proposed [1-3]. The physical modelling of unsaturated soils is used for this study. The shape of the retention curve is a consequence of physical assumptions. The paper presents a theoretical model based on elastic spherical particle arrangement. Firstly, a uniform model is presented with a single diameter of soil particle. The second step extends the use of the model to graded soils. The model uses only physical parameters easy to measure. The model is compared with the experimental retention curve of two different samples, the Livet-Gavet loam (1.61m-3mm) as paste and the Gavet sandy loam compacted with 85 falls per layer of Proctor weight. It shows its ability to model the experimental curves. It is of great interest for engineers as it uses only physical parameters. It gives a direct determination of the retention curve along the wetting path and along the drying path. It shows also the importance of adsorbed water to describe the retention curve.

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Physical modelling on unsaturated soils using centrifuge

Unsaturated Soils ◽

10.1201/b10526-98 ◽

2010 ◽

pp. 633-639 ◽

Cited By ~ 1

Author(s):

B Caicedo ◽

J Tristancho ◽

L Thorel

Keyword(s):

Unsaturated Soils ◽

Physical Modelling

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Physical modelling of piles under lateral loading in unsaturated soils

E3S Web of Conferences ◽

10.1051/e3sconf/202019501021 ◽

2020 ◽

Vol 195 ◽

pp. 01021

Author(s):

Leonardo Maria Lalicata ◽

Giada Maria Rotisciani ◽

Augusto Desideri ◽

Francesca Casini ◽

Luc Thorel

Keyword(s):

Unsaturated Soils ◽

Bending Moment ◽

Physical Modelling ◽

Lateral Force ◽

Single Pile ◽

Clayey Soils ◽

Partial Saturation ◽

High Permeability ◽

Geotechnical Centrifuge ◽

Pile Response

In this paper, selected aspects of an experimental study conducted in a geotechnical centrifuge are discussed. The tests aimed to explore the effects of partial saturation of soil on the response of a single pile subjected to a combination of lateral force and bending moment under drained conditions. The soil used in the experiments is a low plasticity silty soil, named B-grade kaolin, characterized by a relatively high permeability compared to the typical values for clayey soils. Two different elevations of the water table and its effects on the pile response under loading are studied. The data show a marked influence of soil partial saturation on the pile response, both under working loads and ultimate loads. In particular, under working loads, the displacement of the head of the pile is appreciably lower than that measured under saturated conditions.

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