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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From soft soil modelling to engineering application
TL;DR: The Creep-SCLAY1S model as discussed by the authors is a rate dependent anisotropic model, which is backed by hierarchical development and systematic validation, and has been used in a variety of engineering applications.
Peer Review
On the thermo-hydro-mechanical behaviour of Argillaceous hard soils-weak rocks
TL;DR: In this article , a comprehensive literature review on laboratory experimental results of the temperature effect on thermal, hydrolic and mechanical behaviour of argillaceous rocks is also caried out, and two themes are examined in the context of appropriate behaviour frameworks developed for this type of materials.
Journal ArticleDOI
Influence of Dry-Wet Cycles on the Structure and Shear Strength of Loess
TL;DR: In this article , isotropic compression tests and triaxial shear tests were carried out on loess with different numbers of dry-wet cycles and the results showed that the drywet cycle mainly reduced the cohesion of loess, and the most obvious decline is after the first cycle.
Journal ArticleDOI
Influence of faults on alteration, mineralogy, and geotechnical behavior of granitic residual soils
TL;DR: In this article, two saprolitic residual soils formed from the same granitic body in a site located in the Southern Brazil Coast were evaluated in terms of hydraulic conductivity, one-dimensional compressibility and shear strength.
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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