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Journal ArticleDOI

The general and congruent effects of structure in natural soils and weak rocks

S. Leroueil, +1 more
- 01 Sep 1990 - 
- Vol. 40, Iss: 3, pp 467-488
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TLDR
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...

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On the behaviour of deep-ocean sediments

B. A. Baudet, +1 more
- 01 Nov 2004 - 
TL;DR: In this paper, the authors examined the behavior of deep-ocean sediments from the North Atlantic abyssal plains by using the Sensitivity Framework, which was developed by Cotecchia & Chandler for structured terrestrial clays.
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1-D compressibility behaviour of cement-lime stabilized soft clays

TL;DR: In this article, the effect of chemical stabilisation on the one-dimensional compression behavior of natural soft clay, based on incremental loading oedometer tests, is investigated. But the effect is not discussed.
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An effective constitutive model for lime treated soils

TL;DR: In this article, a constitutive model is proposed in the framework of the Modified Cam Clay model to describe the behaviour of lime treated soils, which can be applied for any structured material regardless of the origin of cementation.
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Influence of Destructuration of Soft Clay on Time-Dependent Settlements: Comparison of Some Elastic Viscoplastic Models

TL;DR: In this paper, the authors compared four elastic viscoplastic constitutive models to predict the time-dependent settlement of soft soils following the application of surface loading and found that they all calculate creep rate in fundamentally the same manner.
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A conceptual model for the chemo-mechanical degradation of granular geomaterials

TL;DR: In this paper, a conceptual model is presented to elucidate the microscopic origins of the chemo-mechanical coupling in granular geomaterials, focusing on the interplay between the inelastic response under high compressive stresses and the chemical reactions leading to mineral dissolution.
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.
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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.