Evaluation of the mechanical properties of fluvial coarsegrained soils from dynamic penetration test

Kučová, Eliška; Kuvik, Marian

doi:10.1088/1757-899x/1209/1/012081

Cited by 3 publications

(2 citation statements)

References 3 publications

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“…The in-situ characterization of coarse soils presents many problems related mainly to the expensive testing procedures. Nevertheless, their characterization in the laboratory requires testing of a larger Representative Elemental Volume (REV) of soil [1][2][3]. During the sampling of these materials, large grains are usually clipped to reduce the volume of soil sampled and returned to the laboratory for the various geotechnical tests.…”

Section: Introductionmentioning

confidence: 99%

The Influence of the Fundamental Parameters on the Mechanical Behavior of Coarse-Grained Soils

Ardouz

Baba²,

Bouanani³

et al. 2022

Civ Eng J

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Coarse-grained soils are a type of soil frequently found in civil engineering projects. The mechanical characterization of these soils is very difficult because of the presence of large-sized elements that disturb or prevent the realization of the tests. However, there is still no rational procedure to characterize coarse soils and determine their mechanical characteristics (cohesion and friction angle) for the calculation of slope stability or structures. The objectives of the research work are to contribute to the improvement of the knowledge of the mechanical behavior of matrix coarse-grained soils and to propose a rational procedure to characterize them. In order to achieve these objectives, it is important to understand the influence of the fundamental parameters related to the mode of reconstitution on the mechanical behavior of the coarse soils: volume fraction, particle size distribution and spread, consolidation level, and the initial state of the matrix. Tests are carried out using the large-sized triaxial testing device in drained conditions. With natural coarse-grained soils, it is very difficult to conduct repeatability tests to validate the results. For this reason, we will study a particular category of coarse-grained soils composed of inclusions (coarse elements) within a fine sandy matrix (matrix coarse-grained soils), using a reference soil composed of a mix of sand and gravel. The results show that for both states of sand compaction (ID=0.4 and ID = 0.8), the shear strength of the soil increases with the increase in the proportion of gravel. This increase is more marked in the case of uniform 8/10 mm gravel. Thus, the size of inclusions has no significant influence on the value of qmax. Doi: 10.28991/CEJ-2022-08-08-012 Full Text: PDF

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Section: Introductionmentioning

confidence: 99%

The Influence of the Fundamental Parameters on the Mechanical Behavior of Coarse-Grained Soils

Ardouz

Baba²,

Bouanani³

et al. 2022

Civ Eng J

View full text Add to dashboard Cite

show abstract

“…The great difficulty in the study of coarse-grained soils results from the presence of elements of large size, which do not permit to test a representative volume of material in the classic test devices [1]. This is why granulometric reconstitution methods are used, which are: capping and substitution [2].…”

Section: Introductionmentioning

confidence: 99%

Novel Methodology for Determining the Mechanical Characteristics of Coarse-Grained Soils

Ardouz

Baba

Bouanani

et al. 2022

Civil and Environmental Engineering

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Coarse-grained soils are a type of soil frequently found in civil engineering projects, and their mechanical characterization still presents a real challenge. They are composed by elements of different dimensions (from a few microns to tens of centimeters), and can be of very varied nature (clay, sand, gravel, pebbles, etc.). The mechanical characterization of coarse-grained soils is very difficult because of the presence of large elements. In order to be able to characterize them in the laboratory by means of conventional size devices, it is very important to study the influence of significant parameters on the mechanical behavior of coarse-grained soils (the volume fraction, particle size distribution and spread, consolidation level and initial state of the matrix), using the large-sized triaxial testing device. In this paper, we will propose a methodology for evaluating the mechanical characteristics of coarse-grained soils based on soil granulometric reconstruction procedures. The method we have named GALA is based on the use of polynomial correlations between the strength increase due to inclusions and the volume fraction fv and the particle spread (d min /d max) of inclusions. We were able to apply this new method to a natural soil. The results showed the relevance of our method.

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An Examination of the Effects of Overestimating Mechanical Properties on Instabilities: The Tangier-Kenitra High-Speed Line Case Study

Ardouz,

Baba

2023

Springer Proceedings in Earth and Environmental Sciences

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Evaluation of the mechanical properties of fluvial coarsegrained soils from dynamic penetration test

Cited by 3 publications

References 3 publications

The Influence of the Fundamental Parameters on the Mechanical Behavior of Coarse-Grained Soils

The Influence of the Fundamental Parameters on the Mechanical Behavior of Coarse-Grained Soils

Novel Methodology for Determining the Mechanical Characteristics of Coarse-Grained Soils

An Examination of the Effects of Overestimating Mechanical Properties on Instabilities: The Tangier-Kenitra High-Speed Line Case Study

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