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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Components of deformation in clay
Rhg Parry,S F Amerasinghe +1 more
TL;DR: In this paper, it is shown that the sweighing of a clay soil from the NORMALLY-consolidated state under isotrropic STRESS DECREASE is inITIALLY ELASTIC, but at high over-constrained state under high overconstraints, both the ELastic and PLASTIC VOLUME CHANGES OCCUR.
Journal ArticleDOI
The Filtering Effect of Pile Foundations in Clay
TL;DR: In this article , the authors report the results of a series of centrifuge experiments exploring the dynamic response of pile foundations, where the results are back-analyzed through a two-step procedure.
Journal ArticleDOI
Distribution and dissipation laws of excess pore water pressure based on pile-soil interface during pile-sinking in saturated clay
Yonghong Wang,Jia Min Jin,Bo Han,Yishun Jiang,Dong-Sheng Jeng,Huining Liu,Zuodong Liang,Linlin Cui +7 more
TL;DR: In this article , two full scale jacked-in piles are penetrated into the clayey soil and studied by monitoring the law of generation and dissipation of excess pore water pressure.
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.