The effect of surcharge pressure on the cyclic vertical deformations for expansive clayey soils in Morocco

Bensallam, Saad; Bahi, Lahcen; Alaoui, Mohamed Elbelghiti; Ejjaaouani, Houssine; Shakhirev, Vladimir

doi:10.1007/s12303-013-0043-x

Cited by 6 publications

(4 citation statements)

References 9 publications

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“…(a+bε 1 ) 2 (12) where a, b, and c are the parameters related to specimen property. The first-order derivative dq/𝑑ε 1 can be derived as follows: 𝑑𝑞 𝑑ε 1 = (a+2cε 1 )(a+bε 1 )-2bε 1 (a+cε 1 ) (a+bε 1 ) 3 (13) The slope of the tangent line at the initial stage is the elastic modulus E0:…”

Section: Poisson's Ratio and Dilatancy Anglementioning

confidence: 99%

“…Over the past decades, many studies attempted to address the couplings between changes in water content and the induced modifications in fabric and mechanical property for swelling rocks and soils [8][9][10][11][12]. It was documented that the swelling behaviour of swelling rocks and soils could be influenced by many factors, including moisture content, dry density and clay mineral content [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigation and modeling of the mechanical behaviour of Yanji swelling mudstone subjected to wetting-drying-freezing-thawing cycles

Zeng¹,

Kong²,

Cui³

2023

Transportation Geotechnics

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Section: Poisson's Ratio and Dilatancy Anglementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental investigation and modeling of the mechanical behaviour of Yanji swelling mudstone subjected to wetting-drying-freezing-thawing cycles

Zeng¹,

Kong²,

Cui³

2023

Transportation Geotechnics

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“…périodes humides et sèches en raison des variations saisonnières [23][24], les phénomènes de retraitgonflement des sols argileux et des formations géologiques argileuses induisent des tassements différentiels [25] qui se manifestent par l'instabilité des ouvrages de génie civil construits [26], l'apparition de fissures et autres désordres dans ces constructions [27], affaiblissement différentiel au-dessous des fondations peu profondes [28]. Les photos la figure 12.A illustrent les fissures au niveau des constructions situées à 100 de la voie ferrée dans le secteur d'étude et la figure 12.B représente les fissures et glissement de la chaussée de la route nationale n° 9 reliant Settat à Marrakech à 1 Km environ de la voie ferrée.…”

Section: Cmss-2017unclassified

Study of the degradation of the geometry of the railway between the pk 80 and 105 at the plateau of Settat (Morocco)

et al. 2018

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Abstract. The plateau of Settat is formed by Paleozoic age formations surmounted by a subhorizontal cover made up mainly of Cretaceous sedimentary rocks formed of limestones, sandstones and clays with alternating marly limestones and marls. The study area is characterized by a dry to semi-dry climate, an endorheic hydrographic network that flows into the plain, and is affected by a hydraulic fracturing network of WNW-ESE and NE-SW directions. These factors cause repetitive and cyclical disturbances and disorders recorded on the railway section between Settat and Machraa Ben Abbou and are due to the shrinkage-swelling of the clay formations. The statistical and critical analysis of the defects identified by the device of measuring the geometric parameters of the railway, coupled with an exploitation of the Optical and Radar satellite images, made it possible to refine the geological, hydrological and structural study of the plain studied. These approaches have shown that this hazard has been favored by the existence of recent clayey and swelling formations under the influence by the climatic, hydrological and geological contrasts marked by intense hydraulic fracturing of the zone.

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“…Through the analysis of the mineral composition of "Macigno" sandstone, the water absorption and water saturation are increased with the increase in montmorillonite content, which may play an important role in the decay process of sandstone [10]. Bensallam et al studied the mechanical behavior of clay under the alternation of dry and wet, and found that the deformation of expansion and shrinkage decreased by the alternation of dry and wet, and the change of soil behavior was affected by load-deformation [11]. Yao et al first studied the weakening mechanism of moisture content and different soaking times on the mechanical properties of coal rock [12].…”

Section: Introductionmentioning

confidence: 99%

Study on Damage Characteristics of Water-Bearing Coal Samples under Cyclic Loading–Unloading

Xie

Yao

et al. 2022

Sustainability

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For underground water reservoirs in coal mines, the complex water-rich environment and changing overburden stress can damage coal pillar dams. In this paper, the coal samples from coal seam 22 of Shangwan coal mine were taken as research objects and the damage mechanism and characteristics of coal samples with different moisture content and wetting-drying cycles under cyclic loading were investigated. The results show that as the moisture content and wetting-drying cycles increase, the post-peak stage of the coal samples under cyclic stress becomes obvious, and the hysteresis loop changes from dense to sparse. Compared to the uniaxial compression experiment, when w = 5.28% (the critical water content), mechanical parameters such as peak strength and modulus of elasticity decrease the most. Under cyclic loading, the damage mode of both sets of coal samples was tensile damage, but the increase in wetting-drying cycles promotes the development of shear fractures. For evaluating fracture types, the RA-AF density map is more applicable to wetting-drying cycle coal samples, whereas for the coal samples with different moisture contents this should be carried out with caution. This study can provide some theoretical basis for the stability evaluation of coal pillar dams in underground water reservoirs.

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The effect of surcharge pressure on the cyclic vertical deformations for expansive clayey soils in Morocco

Cited by 6 publications

References 9 publications

Experimental investigation and modeling of the mechanical behaviour of Yanji swelling mudstone subjected to wetting-drying-freezing-thawing cycles

Experimental investigation and modeling of the mechanical behaviour of Yanji swelling mudstone subjected to wetting-drying-freezing-thawing cycles

Study of the degradation of the geometry of the railway between the pk 80 and 105 at the plateau of Settat (Morocco)

Study on Damage Characteristics of Water-Bearing Coal Samples under Cyclic Loading–Unloading

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