Caractérisation minéralogique et géotechnique des argiles marneuses gonflantes de la région de Médéa, Algérie

Medjnoun, Amal; Khiatine, Mohamed; Bahar, Ramdane

doi:10.1007/s10064-014-0582-z

Cited by 10 publications

(4 citation statements)

References 8 publications

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“…In addition, these five samples (X1, X2, X3, X4 and X5) were subjected to standard X-ray diffraction as a natural powder pattern as well as clay thin sections. This mineralogical characterization of marl formations allows to see if the material is more prone to swelling-shrinkage or landslides hazard (Medjnoun et al 2014;Faleh et al 2002;Jian et al 2009;Djerbal et al 2012;Regmi et al 2012;etc. ).…”

Section: Geotechnical Analysismentioning

confidence: 99%

Multi-criteria assessment approach of slow-moving urban landslide hazard: the case of Moulay Yacoub, Morocco

et al. 2022

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Since many decades, the town of Moulay Yacoub (MY) has undergone an intensification of its urbanization to meet the demands of rental housing for the visitors of the hydrothermal springs, which is considered as the only attraction of the town. Unfortunately, the majority of the buildings, both private and public, suffer from varying levels of damages where the lithological and geomorphic field features are to blame, without omitting the anthropogenic effects. In fact, the town is built on a marly hill conducive to slope movements, ranging from shallow solifluctions to large landslides, besides the swelling/shrinkage behaviour of these marls. The paper presents a multi-source approach to investigate the activity and the interactions of slow urbanized landslides and expansive soils within the urban perimeter of Moulay Yacoub. Indeed, the desiccation cracks of marly soils reveal their expansive behaviour, also attested by the swelling values. The other geotechnical parameters obtained from laboratory tests show that the shallow marls samples are severely weathered compared to those of the compacted deep ones. The Borehole data and seismic noise survey allows the detection of several impedance contrasts corresponding to the shallow weathered-deep marls interfaces which in some cases represent the rupture surfaces of gravitational processes. The very slow but perennial activities of the later are attested by the inclinometers, the PS-InSAR monitoring and building damages. The case study provides a good opportunity to highlight the complementarity of the multi-source tasks which stand as a further contribution to fostering this kind of integrated approaches at the slope scale.

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Section: Geotechnical Analysismentioning

confidence: 99%

Multi-criteria assessment approach of slow-moving urban landslide hazard: the case of Moulay Yacoub, Morocco

et al. 2022

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“…Several cases of damages have occurred in recent years in many parts of the country (e.g., Medea, Batna, Tlemcen, Oran). [6][7][8] Soil-structure interaction is assured by the foundations, which have the important role of transferring loads to the supporting soils. For this reason, when studying the foundation swelling soils of a construction, should interest with their mechanical behavior under the applied loads, also take into account that swelling strain of clay soils occur over time as a function of soil properties [9] (e.g., mineralogy, structure, suction, plasticity and dry density, permeability), also the environmental conditions (e.g., moisture variations, climate, vegetation).…”

Section: Introductionmentioning

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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“…In the absence of external mechanical stress, free drying or wetting leads to changes in soil volume, water content as well as degree of saturation, and that may result in settlements or heave of structures. This hydric difference related to these over consolidate clays, can cause annually shrinkages and swellings, which are sometimes very detrimental (e.g., Houmadi et al, [17] Lamara et al, [20] Medjnoun et al, [26] and Mohanty et al [29] ). The main parameter that causes these changes in volume and water content of unsaturated soils is suction which plays a vital role on soil volumetric behavior.…”

Section: Introductionmentioning

confidence: 99%

Volumetric behavior of natural swelling soil on drying-wetting paths. Application to the Boumagueur marl -Algeria-

Mebarki

Kareche

Benyahia

et al. 2020

Studia Geotechnica Et Mechanica

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This article presents the results of experimental work carried out both in situ (coring; pressuremeter test) and in the laboratory (drying-wetting and oedometric tests) to describe the volumetric behavior on drying-wetting path of a swelling clayey soil of eastern Algeria. In order to perform drying-wetting tests the osmotic technique and saturated salts solutions were used. These suction-imposed methods have gained widespread acceptance as reliable methods for imposing suction on soil specimens. They allowed to sweep a wide range of suctions between 0 and 500 MPa. The ability to impose suction on soil specimens allows for drying and wetting stress paths to be applied to evaluate resulting changes in state parameters (void ratio, degree of saturation and water content). These paths were carried out on specimens with different initial states. Slurries of soil were used to characterize the reference behavior, while the undisturbed soil samples allow to describe the behavior of material under in situ conditions. In the last part of this article and to specify the behavior observed in the saturated domain, a comparison between the resulting deformations of the drying-wetting test and those resulting from the oedometric test was made.

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Caractérisation minéralogique et géotechnique des argiles marneuses gonflantes de la région de Médéa, Algérie

Cited by 10 publications

References 8 publications

Multi-criteria assessment approach of slow-moving urban landslide hazard: the case of Moulay Yacoub, Morocco

Multi-criteria assessment approach of slow-moving urban landslide hazard: the case of Moulay Yacoub, Morocco

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

Volumetric behavior of natural swelling soil on drying-wetting paths. Application to the Boumagueur marl -Algeria-

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