Journal ArticleDOI
The general and congruent effects of structure in natural soils and weak rocks
S. Leroueil,P. R. Vaughan +1 more
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In this article, the engineering properties of naturally occurring sedimentary and residual deposits which are usually treated in geotechnical engineering as ‘soils’ are reviewed, and it is shown that usually they have characteristics due to bonded structure which are similar to those of porous weak rock.Abstract:
The engineering properties of naturally occurring sedimentary and residual deposits which are usually treated in geotechnical engineering as ‘soils’ are reviewed, and it is shown that usually they have characteristics due to bonded structure which are similar to those of porous weak rock. While this structure can arise from many causes, its effects follow a simple general pattern that involves stiff behaviour followed by yield. This yield can be described in a similar way to that occurring due to overconsolidation, although it is a separate phenomenon. The effects of structure are as important in determining engineering behaviour as are the effects of initial porosity and stress-history, which are the basic concepts of soil mechanics. As it can be described in a general way, it is concluded that structure and its effects should be treated as a further basic concept of equal importance. L'article passe en revue les proprietes des depots sedimentaires et residuels naturels qui sont nor-malement traites comm...read more
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Journal ArticleDOI
A bounding surface plasticity model for cemented sand under monotonic and cyclic loading
TL;DR: In this paper, a plasticity model is proposed to simulate the monotonic and cyclic behavior of cemented sand, which is an extension of the critical state-based bounding surface plasticity (CSBP) model.
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Validación de modelos constitutivos avanzados de comportamiento mecánico para la arcilla estructurada de Brasilia
TL;DR: In this paper, an analysis of the comportamiento of the arcilla estructurada and cementada de la ciudad de Brasilia by medio de ensayos triaxiales and simulaciones numericas is presented.
Journal ArticleDOI
Experimental quantification of 3D deformations in sensitive clay during stress-probing
Georgios Birmpilis,Edward Andò,Olga Stamati,S. A. Hall,Habil Eleni Gerolymatou,Jelke Dijkstra +5 more
TL;DR: In this paper , 3D deformation data collected during drained triaxial tests on intact specimens of a natural sensitive clay were collected during X-ray computed tomography (XCT) measurements and three distinct drained stress ratios were studied for pseudo-isotropic, K0, and highly deviatoric loading paths.
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Sensitivity Analysis of Selected Input Parameters for an Advanced Constitutive Model
L. Sebastian Bryson,Ali Salehian +1 more
TL;DR: In this paper, the 3-SKH model was compared to the performance of two other critical state models; the Cam Clay (CC) and Modified Cam Clay(MCC) models.
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A damage hypoplasticity constitutive model for cemented sand and gravel materials
TL;DR: In this article, a hypoplastic constitutive model is proposed to model the cementation-induced enhanced stiffness, strength and dilative behavior of cemented sand and gravel materials, which is based on the original equations proposed by Gudehus and Bauer (1996) and is extended on the basis of the concept of geometrical constraints due to cementation.
References
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Journal ArticleDOI
On The Yielding of Soils
TL;DR: In this paper, Hvorslev's equation for the shear strength of clay is shown to define a surface in a space of three variables σ, e and τ. The progressive yielding of a sample defines a loading path in this space, and the paths taken by samples in differing tests can be correlated if a boundary energy correction is applied.
Journal ArticleDOI
Stress–strain–strain rate relation for the compressibility of sensitive natural clays
TL;DR: In this paper, four types of oedometer tests (constant rate of strain tests, controlled gradient tests, multiple-stage loading tests and creep tests) were carried out on a variety of Champlain sea clays.
Journal ArticleDOI
Cemented sands under static loading
TL;DR: In this paper, a test program was undertaken to define the nature of the cementation and its effect on behavior of the soils, and a total of 137 laboratory compression and tension load tests were performed on undisturbed samples of naturally and artificially prepared cemented sands.
Journal ArticleDOI
Ninth Laurits Bjerrum Memorial Lecture: "Small is beautiful"—the stiffness of soils at small strains
TL;DR: In this paper, the authors show how field measurements of displacement around foundations and excavations combined with numerical analysis and recent developments in laboratory techniques can be used to estimate the displacement of foundations.
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