Modelling the destructuring of soils during virgin compression

Liu, M. D.; Carter, John

doi:10.1680/geot.2000.50.4.479

Cited by 102 publications

(47 citation statements)

References 14 publications

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“…A much wider bond strength distribution produces a less rapid onset of yield, and more gradual convergence to the intrinsic compression line. A distribution with a low modulus such as 0.5 gave the most realistic behaviour with regards to modelling a strongly cemented sand, and analysing the simulations using Liu and Carter's [10,23] framework for the compression of structured soils, the value of the destructuring index, b appeared to be in the correct range. The destructing indices obtained from the simulations appeared to be a function of the bond strength distribution.…”

Section: Discussionmentioning

confidence: 97%

“…Liu and Carter [10,23] developed a framework to describe the idealised behaviour of structured soils in compression. They proposed that the post-yield behaviour in onedimensional compression could be described by:…”

Section: Bond-strength Distributionsmentioning

confidence: 99%

“…where S is a soil parameter called the structure index, σ s,y is the vertical stress at which yield of the structured soil occurs and σ is the current vertical stress [23]. The value of S can be calculated if the yield stress of the structured soil and the voids ratios of both the structured and unstructured soils at that yield stress are known.…”

Section: Bond-strength Distributionsmentioning

confidence: 99%

“…Experimental data for values of b for cemented 16 Compression behaviour with predictions using Eq. (9) for an artificially cemented sand and a calcarenite, data from Liu and Carter [23] sands is quite limited: Liu and Carter [23] found a value of 3 for artificially cemented silica sand [24], and a value of 35 for a calcarenite [20]; shown in Fig. 16.…”

Section: Bond-strength Distributionsmentioning

confidence: 99%

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Discrete element modelling of one-dimensional compression of cemented sand

Bono

McDowell

2013

Granular Matter

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It has recently been shown that the onedimensional normal compression of sand can be modelled effectively in three-dimensions using the discrete element method, and that the slope of the compression curve (in log voids ratio-log stress space) is controlled by the size effect on average particle strength. This paper incorporates soil structure by simulating cemented sand, and the effects of interparticle bonding (including bond strength and strength distributions) on the one-dimensional compression behaviour and evolving particle size distributions are investigated. The results show that bonding reduces particle crushing, and it is both the magnitude and distribution of bond strengths that influence the compression curve of the structured material.

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Section: Discussionmentioning

confidence: 97%

Section: Bond-strength Distributionsmentioning

confidence: 99%

Section: Bond-strength Distributionsmentioning

confidence: 99%

Section: Bond-strength Distributionsmentioning

confidence: 99%

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Discrete element modelling of one-dimensional compression of cemented sand

Bono

McDowell

2013

Granular Matter

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“…In this figure, e represents the voids ratio for a cemented clay, e* is the voids ratio of the reconstituted clay at same stress state with the same yield surface, p y,i is the mean effective stress at which virgin yielding of the cemented soil begins, and e, the additional voids ratio, is the difference in voids ratio between the cemented clay and the reconstituted clay at the same stress state. Hence, the virgin compression behaviour of a cemented soil can be expressed by the following equation proposed by Liu and Carter [11],…”

Section: Materials Idealizationmentioning

confidence: 99%

Simulating The Stress And Strain Behavior Of Loess Via Scc Model

Liu¹,

Liu²,

Horpibulsuk³

et al. 2013

Proceedings of the 18th Southeast Asian Geotechnical Conference (18SEAGC) &Amp; Inaugural AGSSEA Conference (1AGSSEA)

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The behaviour of collapsible soils (loess) is studied in this paper. Simulations of the stress and strain behaviour of the soil are made via the theoretical framework of Structured Cam Clay, with the effect of glutinous ingredient in loess suggested to be modelled as cementation effect. Based on the simulations, the capacity of the model for representing the behaviour loess is investigated, and discussions on modelling the behaviour of collapsible soil in general are given.

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A constitutive model for structured soils under saturated and unsaturated conditions

Dai

Zhou

2023

Num Anal Meth Geomechanics

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Many constitutive models for unsaturated soils have been reported in the literature, but only a few of them attempted to incorporate the influence of soil structure, which is a combination of fabric and bonding. Some important aspects of unsaturated soil behaviour, such as the effects of soil structure on the loading collapse (LC) curve, cannot be well captured by the existing models. This study developed a new elastoplastic model for isotropic structured soils under saturated and unsaturated conditions. In particular, several new equations were proposed to model (i) the influence of soil structure on the LC curve; (ii) the evolution of the LC curve during structure degradation. Therefore, the initial soil structure and its evolution under hydro‐mechanical loads can be properly simulated. To validate this new model, it was applied to simulate the behaviour of structured and unsaturated soils along different suction and stress paths, including constant‐stress wetting, constant‐suction isotropic compression, one‐dimensional (1D) compression and triaxial shearing. The measured and computed results are well matched, demonstrating the good capability of the proposed model.

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Modelling the destructuring of soils during virgin compression

Cited by 102 publications

References 14 publications

Discrete element modelling of one-dimensional compression of cemented sand

Discrete element modelling of one-dimensional compression of cemented sand

Simulating The Stress And Strain Behavior Of Loess Via Scc Model

A constitutive model for structured soils under saturated and unsaturated conditions

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