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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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Effect of initial water content on undrained shear behaviour of reconstituted clays
TL;DR: In this paper, the effect of initial water content w0 on undrained strength behavior was investigated on three reconstituted clays, and the predominant clay mineral was identified based on a semi-quantitative analysis of X-ray diffraction patterns.
Journal ArticleDOI
Triaxial shear behavior of a cement-treated sand–gravel mixture
Younes Amini,Amir Hamidi +1 more
TL;DR: In this paper, a series of conventional triaxial compression tests were conducted on a cemented poorly graded sandegravel mixture containing 30% gravel and 70% sand in both consolidated drained and undrained conditions.
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Yielding and plastic behaviour of Boom clay
TL;DR: In this article, an underground research laboratory has been excavated in a deposit of Boom clay at a depth of 223 m by the SCK-CEN Belgian organization near the city of Mol.
Journal ArticleDOI
Influence of physical properties on deformation characteristics of collapsible soils
TL;DR: In this paper, structural pressure values are introduced as separation points between elastic and plastic states of any soil (including collapsible soils) subjected to loading, and new analytical expressions describing dependence of mechanical characteristics of collapsible soil on soil void ratios and moisture contents are proposed.
Journal ArticleDOI
Quantification of the effects of structure on the compression of a stiff clay
TL;DR: In this paper, a detailed analysis of the compression behavior of London Clay from oedometer tests was made, investigating the effects of the clay structure through comparisons between the behaviour of the intac...
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.
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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.
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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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