Journal ArticleDOI
Driven piles in clay - the effects of installation and subsequent consolidation
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In this article, the effects of installing a driven pile on the strength of the soil were investigated using a work-hardening elasto-plastic soil model, which has the unique feature of allowing the strength to change as the water content changes, thus it is possible to calculate the new intrinsic soil strength at any stage during consolidation.Abstract:
This paper describes the results of numerical analysis of the effects of installing a driven pile. The geometry of the problem has been simplified by the assumption of plane strain conditions in addition to axial symmetry. Pile installation has been modelled as the undrained expansion of a cylindrical cavity. The excess pore pressures generated in this process have subsequently been assumed to dissipate by means of outward radial flow of pore water. The consolidation of the soil has been studied using a work-hardening elasto–plastic soil model which has the unique feature of allowing the strength of the soil to change as the water content changes. Thus it is possible to calculate the new intrinsic soil strength at any stage during consolidation. In particular the long-term shaft capacity of a driven pile may be estimated from the final effective stress state and intrinsic strength of the soil adjacent to the pile. A parametric study has been made of the effect of the past consolidation history of the soil...read more
Citations
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Journal ArticleDOI
A semi-analytical solution for swelling around a borehole
TL;DR: In this article, a semi-analytical solution for the radial dissipation of pore water pressure around a freshly created, vertical hole is presented in the form of isochrones of excess porewater pressure and may be used to obtain estimates of the time required for the soil around the hole to swell and therefore to soften.
DissertationDOI
Analysis of ground response and ground-support interaction in tunnelling considering large deformations
Field Instrumentation and Testing to Study Set-up Phenomenon of Driven Piles and Its Implementation in LRFD Design Methodology
TL;DR: This chapter discusses literature review in the form of a monograph, with a focus on two sections: literature and literature review.
Journal ArticleDOI
Role of normal boundary condition in interface shear test for the determination of skin friction along pile shaft
TL;DR: In this paper, numerical results from a two-dimensional discrete element method (DEM) simulation study on the influence of lateral boundary condition on shaft resistance of a pile driven into a cliff were presented.
Journal ArticleDOI
Pile driving by numerical cavity expansion
TL;DR: In this paper, a cavity expansion procedure for the simulation of pile driving is presented and assessed using a non-linear finite-element model and the penetration of the pile into the soil is simulated by a radial opening of the soil around the pile.
References
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On the generalized stress-strain behavior of wet clay
TL;DR: The theory of the three-dimensional stress-strain behavior of WET CLAYs was introduced by BURLAND as discussed by the authors, who showed that WETCLAYs are subject to three dimensions of stress and strain.
Journal ArticleDOI
Skin Friction between Various Soils and Construction Materials
TL;DR: In this article, the authors used several hundred experiments to determine the magnitude of skin friction, in which the following variables were considered: (1) Various construction materials: steel, wood, concrete; (2) For each material two surface conditions were used: smooth and rough; which are described in such a way that they may be reproduced by anyone with a reasonable degree of accuracy.
Journal ArticleDOI
The Sensitivity of Clays
A. W. Skemption,R. D. Northey +1 more
TL;DR: The sensitivity of clays is defined as the ratio of their undisturbed and remoulded strengths, and varies from about 1·O for heavily overconsolidated clays to values of over 100 for the so-called extrasensitive or quick clays.
Journal Article
Bearing capacity and settlement of pile foundations
TL;DR: In this paper, the authors point out further aspects of limit point bearing capacity of piles in sand as well as the overlayered stratum and critical depth, and propose a relationship between the critical depth D sub c and p sub c, or 1 sub 1.