Estimation of ground settlement beneath foundations due to shrinkage of clayey soils

Jahangir, Emad; DeckOlivier,; MasrouriFarimah,

doi:10.1139/t2012-042

Cited by 8 publications

(3 citation statements)

References 23 publications

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“…The soil stress state is determined by the calculation of two stress components, mentioned as follows: the geostatic stresses σ z,g , which are increasing linearly with depth and can be computed using the classic equation σ z,g =γ sw ×z. The loading stresses σ z,load are due to the construction weight, decrease with depth [27] and can be computed using Equation (1). [28] In addition, this simple approach is generally related to the foundation found on a horizontal surface and homogeneous soil.…”

Section: Analytical Approachesmentioning

confidence: 99%

Heave analysis of shallow foundations founded in swelling clayey soil at N’Gaous city in Algeria

Khennouf

Bahaj

2020

Studia Geotechnica Et Mechanica

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AbstractThe design of shallow foundations on swelling soils needs a thorough study to evaluate the effect of swelling potential soil on the final foundation heave. For this reason, a simple analytical approach based on the soil stress state under the foundation can be used to calculate the foundation heave. This paper reports a set of analytical and numerical analysis using the finite-difference code (FLAC 3D), performed on an isolated shallow foundation founded on a swelling soil mass at N’Gaous city in Batna Province, Algeria, subjected to distributed vertical loads. Further, the influence of some parameters on total heave was analyzed, such as the embedded foundation and soil stiffness. The analysis results from the proposed 3D modelling was compared and discussed with analytical results. The numerical results obtained show a good agreement with the analytical solutions based on oedometer tests proposed in the literature, and deliver a satisfactory prediction of the heave of the shallow foundations.

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Section: Analytical Approachesmentioning

confidence: 99%

Heave analysis of shallow foundations founded in swelling clayey soil at N’Gaous city in Algeria

Khennouf

Bahaj

2020

Studia Geotechnica Et Mechanica

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“…Swelling occurs when the water content increases, while shrinking occurs when the water content decreases. Non-uniform settlements in the soil under buildings and in soil subject to air desiccation can damage building foundations (Abdelmalak, 2007;Jahangir, Deck, & Masrouri, 2011, 2012Maisa, Kleeman, & Melchers, 2004;Nelson & Miller, 1992). Moreover, drying increases tensile stresses that can locally exceed the soil's tensile strength, which leads to the initiation of cracks (Konrad & Ayad, 1997).…”

Section: Please Scroll Down For Articlementioning

confidence: 99%

Quantification of soft soil cracking during suction cycles by image processing

Auvray

Rosin-Paumier

Abdallah

et al. 2013

European Journal of Environmental and Civil Engineering

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Soil cracking has been studied for many decades; however, it still deserves further investigation. This paper describes a new testing device that uses image processing to perform simultaneous and continuous quantification of the vertical strain and radial strain, crack area, and water content of a soil specimen subjected to suction cycles imposed by the vapour equilibrium method. An image processing method was designed to determine the crack area and the soil radial strain separately. The evolution of each measured parameter over time in a clayey soil specimen subjected to 3 suction cycles is presented and discussed. The first suction cycle has the greatest impact on the crack area, the mass water content, the vertical strains and the radial strains. Hysteresis loops were observed for crack area and radial strain evolution.

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“…In this regard, the work conducted by Bezih et al (2015Bezih et al ( , 2017 [7,8] show the significant effect of soil-structure interaction on the reliability of RC bridges. Jahangir et al (2012) [9] developed analytical model to investigate the effects of the shrinkage of clayey soils on buildings through soil-structure interaction analysis. Recently, Masaeli and Panali (2018) [10] presented a numerical model for analyzing the nonlinear soil-structure interaction.…”

Section: Introductionmentioning

confidence: 99%

Effect of Long-Term Soil Deformations on RC Structures Including Soil-Structure Interaction

Bezih¹,

Chateauneuf²,

Demagh³

2020

Civ Eng J

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Lifetime service of Reinforced Concrete (RC) structures is of major interest. It depends on the action of the superstructure and the response of soil contact at the same time. Therefore, it is necessary to consider the soil-structure interaction in the safety analysis of the RC structures to ensure reliable and economical design. In this paper, a finite element model of soil-structure interaction is developed. This model addresses the effect of long-term soil deformations on the structural safety of RC structures. It is also applied to real RC structures where soil-structure interaction is considered in the function of time. The modeling of the mechanical analysis of the soil-structure system is implemented as a one-dimensional model of a spring element to simulate a real case of RC continuous beams. The finite element method is used in this model to address the nonlinear time behavior of the soil and to calculate the consolidation settlement at the support-sections and the bending moment of RC structures girders. Numerical simulation tests with different loading services were performed on three types of soft soils with several compressibility parameters. This is done for homogeneous and heterogeneous soils. The finite element model of soil-structure interaction provides a practical approach to show and to quantify; (1) the importance of the variability of the compressibility parameters, and (2) the heterogeneity soil behavior in the safety RC structures assessment. It also shows a significant impact of soil-structure interaction, especially with nonlinear soil behavior versus the time on the design rules of redundant RC structures. Doi: 10.28991/cej-2020-03091618 Full Text: PDF

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Estimation of ground settlement beneath foundations due to shrinkage of clayey soils

Cited by 8 publications

References 23 publications

Heave analysis of shallow foundations founded in swelling clayey soil at N’Gaous city in Algeria

Heave analysis of shallow foundations founded in swelling clayey soil at N’Gaous city in Algeria

Quantification of soft soil cracking during suction cycles by image processing

Effect of Long-Term Soil Deformations on RC Structures Including Soil-Structure Interaction

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