Journal ArticleDOI
Driven piles in clay - the effects of installation and subsequent consolidation
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TLDR
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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Experimental Study of Hollow Fibre Reinforced Polymer Piles in Soft Clay
Giraldo Velez,Juan David +1 more
TL;DR: In this article, a research program aimed at investigating the performance of fiber reinforced polymers (FRP) piles in soft clays is presented, and the results of this experimental program indicate that for all of the FRP pile interfaces tested the interface shear strength is higher or at least on par with steel pile interfaces.
Journal ArticleDOI
Theoretical “t-z” Curves for Piles in Radially Inhomogeneous Soil
TL;DR: In this paper, the authors proposed a linear-elastic, power-law and hyperbolic constitutive model for axially loaded piles, which is based on the concentric cylinder model to define an attenuation function.
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Volumetric Changes and Point of Saturation around a Pressuremeter Probe Used in Unsaturated Soils
TL;DR: In this article, a method to determine the applied radial total stress that will result in saturation for the pressuremeter test is developed based on Hilf's method of pore water pressure prediction during compressive loading of an unsaturated soil.
Journal ArticleDOI
Elasto-plastic solutions for expanding cavities in strain-hardening and/or softening soils
TL;DR: In this article, an analytical finite strain solution for cavity expansion in strain-hardening and/or softening Mohr-Coulomb soil subjected to a non-associated flow rule is presented.
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.