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
Assessment of disturbance impact of hydraulic jacked-in pile penetration in artificial clayey soil
Nabeel Katfan Lwti,Ahmad Safuan A. Rashid,Abd. Rahman Tamuri,Abideen Adekunle Ganiyu,Suksun Horpibulsuk,Suksun Horpibulsuk,Roohollah Kalatehjari +6 more
TL;DR: The jacked-in pile method provides a substitute procedure that permits the installation of pre-formed piles with negligible vibration in a noiseless manner, thereby reducing noise impacts in marine environments as discussed by the authors.
Journal ArticleDOI
New Approach for Predicting the Load-Displacement Curve of Axially Loaded Piles in Sand
TL;DR: In this article , a relationship to predict the load-displacement curve for axially loaded piles in sandy soil is presented by using the tri-linear softening model to describe the shaft load displacement relationships, as well as a bi-linear model is adopted to characterize the unit end resistance displacements reaction in the region of the pile's tip soil.
Journal ArticleDOI
Mechanical behaviour of a weakly structured soil at low confining stress
TL;DR: Artificially cemented soft soil samples were produced by mixing kaolin, beta hemihydrate and water as discussed by the authors , which was shown to demonstrate many of the characteristics of natural soft clays.
Proceedings ArticleDOI
Dynamic load testing on the bearing capacity of prestressed tubular concrete piles in soft ground
Chuang Yu,Songyu Liu +1 more
TL;DR: Dynamic load testing (DLT) is a high strain test method for assessing pile performance as mentioned in this paper, which has been successfully transferred to the testing of prestressed pipe piles in marine soft clay of Lianyungang area in China.
Journal ArticleDOI
Friction anlysis of large diameter steel cylinder penetration process using 3D-DEM
TL;DR: In this article, the authors presented a friction analysis of large diameter steel penetration process by using the discrete element method (DEM), which can simulate large deformation and nonlinearity well.
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.