Particle mechanics approach to continuum constitutive modelling

Dean, E. T. R.

doi:10.1680/gr.14.00018

Cited by 7 publications

(2 citation statements)

References 78 publications

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“…However undrained loading following such large strains is brittle and prone to shear banding. The risk of shear banding may be reduced by reconsolidation, which reduces dilatancy (Wang et al, 2015(Wang et al, , 2016, but reconsolidated tests are still more brittle than intact tests 2014, 2015. A better understanding of the effects of reconsolidation on shear banding risk is required if cyclic loading and consolidation are used to develop significantly increased strength through inducing large strains.…”

Section: Observational Design Considerationsmentioning

confidence: 99%

Controlled heavy-haul traffic loading as a method to remediate liquefiable soft silts

2019

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Transporting of extremely large indivisible loads (10 000–30 000 t) is becoming increasingly popular to allow offsite modular construction of infrastructure for oil and gas, mining, and renewable energy projects in remote areas. Such exceptionally large transient loads could encounter unusual geohazards: there is a risk of metastable liquefaction when crossing soft alluvium, causing sudden failure, potential casualties, and severe production delays. Furthermore, temporary roads for these payloads are a large cost to such projects; conventionally designed earthworks and (or) ground improvement are often unaffordable or logistically impossible. This laboratory study indicates the fabric can be strengthened, and the hazard reduced, if the soil is subjected to careful repeated loading that rearranges the initially precarious fabric through gradual accumulation of plastic strains. A novel remediation technique for these temporary haul roads is proposed: managed deployment of increasingly heavy haul vehicles could result in staged fabric rearrangement that strengthens the soil to the point where it would be safe for the heavy vehicles to use it. In so doing, a more economic temporary haul road is open to operations (coupled with observation methods to ensure adequate performance throughout) and production activities are not overly disrupted.

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Section: Observational Design Considerationsmentioning

confidence: 99%

Controlled heavy-haul traffic loading as a method to remediate liquefiable soft silts

2019

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“…Design and construction of modern buildings requires improving the quality of subgrade deformations forecasts, including during their operation. Thus, E. T. R. Dean [2] developed a model of a discrete medium as the interaction of discrete particles in a continuous pressure distribution.…”

Section: Introductionmentioning

confidence: 99%

On the fractal characteristics of loess subsidence

Mokritskaya¹,

Tushev²,

Nikulchev³

et al. 2016

ces

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Loess soils may be considered as a discrete medium. Under increasing humidity subsidence degradation occurs as a result of the slow disintegration of microaggregates into free particles, repackaging and porosity changes. The volumetric porosity of the formed new structure and the volumetric porosity changes can be quantified from the position of the fractal theory. The main aim of this paper is to show that the fractal dimension of the particle size distribution function has important role in the description of the subsidence degradation from the standpoint of a new approach to the evaluation of soil subsidence. For approbation of our theoretical propositions we studied subaerial eluvial-diluvial and eolian-diluvial loess soils of Pleistocene age in the outskirts of Dnipropetrovsk. The value of is correlated with the amount of free particles, it is influenced by the genesis because is less in loess horizons than in paleosoil. Minimum of the fractal dimension of the particle size distribution function is obtained with aggregative method of preparation in which decomposition of aggregates is less expressed.

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