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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Journal ArticleDOI
A Graphical Analysis-based Method for Undrained Cylindrical Cavity Expansion in Modified Cam Clay Soil
S L Chen,Younane N. Abousleiman +1 more
TL;DR: In this article , a novel graphical analysis-based method is proposed for analysing the responses of a cylindrical cavity expanding under undrained conditions in modified Cam Clay soil, which decomposes and represents the strain increment/rate of a material point graphically into the elastic and plastic components in the deviatoric strain plane.
Journal ArticleDOI
Model tests on bearing capacity and accumulated settlement of a single pile in simulated soft rock under axial cyclic loading
TL;DR: In this paper, the accumulated deformation of the pile head and the axial force were measured by LVDT and strain gauges, respectively, and an empirical formula for accumulated settlement, considering the effects of the number of cycles, the static load ratio, the cyclic load ratio and the uniaxial compressive strength, was proposed which can be used for feasibility studies or preliminary design of pile foundations on soft rock subjected to cyclic loading.
Journal ArticleDOI
Analytical Solutions of Spherical Cavity Expansion Near a Slope due to Pile Installation
TL;DR: The present solution provides a simplified and realistic theoretical method to predict the soil behaviors around the spherical cavity near the sloping ground and can be used for the determination of the inclination angle of the slope according to the maximum permissible displacement.
Dissertation
Analysis of forces and displacement in floating pile with different analytical methods - A case study of Lilla-Bommen-Marieholm tunnel foundation
TL;DR: In this article, load distribution in a long floating pile as function of pile head load and down drag effect was presented, and installation effects on instrumented pile investigated. But the authors did not consider the impact of the instrumentation equipment placement on the load distribution.
Proceedings ArticleDOI
Shaft Resistance of Piles in Normally Consolidating Marine Clay Subjected to Compressive and Uplift Load
TL;DR: In this paper, the authors present 24 test results on instrumented hollow tubular aluminum close ended floating piles in laboratory to examine the mechanisms of load transfer between the piles surface and normally consolidating marine clay.
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.