Free desiccation shrinkage process in clayey soils

Cheng, Wenqing; Yang, Zhengtian; Hattab, Mahdia; Bian, Hanbing; Bouchemella, Salima; Fleureau, Jean‐Marie

doi:10.1080/19648189.2021.1942223

Cited by 8 publications

(2 citation statements)

References 28 publications

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“…This high exposure to drought increases the vulnerability of these soils, which are cracked by desiccation, making them less resistant. Desiccation cracking has been the subject of much previous research [2,3,4,5] and more recently * Corresponding author: lamine.ighil-ameur@cerema.fr [6,7]. These works approached the phenomenon of cracks by various aspects, for example: by the research of the mechanisms of initiation and propagation of cracks under hydric and mechanical solicitations (or coupled), by the influence of the initial suction of the ground, by the analysis of the anisotropy of the variations of volume during the shrinkage.…”

Section: Introductionmentioning

confidence: 99%

Analysis of climate change impacts on the shrinkage-swelling phenomenon of clayey soils to adapt infrastructures

Ameur

2023

E3S Web of Conf.

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As a tendency in France, the well-known shrinkage-swelling phenomenon of clayey soils intensifies naturally and durably under climate change effects after the severe droughts happened post 2015. More than 10.4 million houses are highly exposed to this phenomenon and the new national zoning shows that high or medium exposure now concerns 48% of the metropolitan soils. Roads are also severely impacted by the shrinkage-swelling phenomenon through damage characterized most often by longitudinal cracks close to the edges and very significant deformations that can be a danger for the safety of users. The aim of this research is first to understand how the natural unsaturated clay soils shrink and swell under numerous drying-wetting cycles using several devices at the laboratory scale. The second approach consist of several in situ experimentations of different techniques to reduce the shrinkage-swelling impact on unsaturated clay soils. The first results show that at the laboratory scale, the unsaturated clay soils can be significantly affected after some drying-wetting cycles. In the other hand, in situ monitoring results show that some techniques allow clay soils to save their hydromechanical properties at a hydric equilibrium state which can reduce settlement deformations. The main goal of these research works is to better understand how the shrinkage-swelling phenomenon of clayey soils evolves under climate change in order to develop the new solutions allowing the adaptation of the infrastructures.

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Section: Introductionmentioning

confidence: 99%

Analysis of climate change impacts on the shrinkage-swelling phenomenon of clayey soils to adapt infrastructures

Ameur

2023

E3S Web of Conf.

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“…e cracks created during desiccation may a ect soil properties such as strength, permeability, and compression ability, which in practice can compromise the sustainability of geotechnical structures by, for instance, inducing severe impact on the performance of embankments [8], mud ow [9], or foundation stability [10]. Owing to the signi cant concern of this question, the mechanism of desiccation cracking of clay soils has gained the attraction of many researchers during the last decades, in both experimental investigations and numerical modeling [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study of the Drying Process of a Consolidated Clay Soil

Cheng

Bian

Gao

et al. 2022

Advances in Civil Engineering

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The clay soil is composed of solid skeleton and porous and can be studied in the framework of porous media. During the drying process, the initial saturated clay soil deforms mainly due to the changes of water content and capillary pressure. With the further increase in capillary pressure, the soil cracks. In fact, the deformation and the stress in clay soil are tightly related with the water content and capillary pressure. Therefore, it is of great interest to understand the changes in capillary pressure and water content within the clay soil during the drying process. However, it is difficult to obtain these field variables by experiments alone. Therefore, the numerical simulation could be good choice for deeper understanding of the dry process in clay soil. In current research, the combined numerical simulation and laboratory experiments research are conducted; the numerical results are compared with the laboratory observation. This research is the basis for the further study of the cracking process of clay soil due to drying.

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Investigation of desiccation cracking in unsaturated clays improved by recycled micro-concrete particles

Ye,

Zhao,

Xie

2024

Bull Eng Geol Environ

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Free desiccation shrinkage process in clayey soils

Cited by 8 publications

References 28 publications

Analysis of climate change impacts on the shrinkage-swelling phenomenon of clayey soils to adapt infrastructures

Analysis of climate change impacts on the shrinkage-swelling phenomenon of clayey soils to adapt infrastructures

Experimental and Numerical Study of the Drying Process of a Consolidated Clay Soil

Investigation of desiccation cracking in unsaturated clays improved by recycled micro-concrete particles

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