A numerical study of spade cell penetration
A numerical study of spade cell penetration
The objective of this research was to quantify the effects of various parameters (e.g. soil strength, interface adhesion and cell geometry) on the stress-strain behaviour of the soil adjacent to a penetrating spade cell.
Parallel numerical fluid flow and soil penetration analyses were conducted to investigate the stress-strain changes that occur around a spade cell during penetration. These analyses were used to assess the influence of various parameters on soil behaviour for a three-dimensional penetration problem.
The results of these analyses showed that: (1) the shape of the spade cell’s tip influences the strains generated around the spade cell; (2) the strain path method is capable of predicting soil deformation in deep three-dimensional penetration problems; (3) the deformations generated around the spade cell can only be successfully evaluated by performing three-dimensional analyses; (4) the stress-strain changes generated in the soil adjacent to the spade cell are influenced by to the soil undrained shear strength, soil shear modulus, interface adhesion, and the aspect ratio of the spade cell; (5) the influence of adhesion on deformations in soil penetration analyses is similar to the effect of viscosity in fluid flow analyses; (6) the horizontal stress distributions are relatively uniform along the inner-half of the spade cell width; and (7) horizontal stresses on the spade cell face at the end of penetration are higher in models where the boundary parallel to the spade cell face is displacement-controlled (rather than stress-controlled). It was concluded that the relative influence of various parameters on the spade cell measurements should be considered in comparing the in-situ stresses measured by spade cells in various field and chamber tests.
University of Southampton
Farhangi, Siavash
126cbdb3-5cd0-4f09-8866-b1d380050e34
2006
Farhangi, Siavash
126cbdb3-5cd0-4f09-8866-b1d380050e34
Farhangi, Siavash
(2006)
A numerical study of spade cell penetration.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
The objective of this research was to quantify the effects of various parameters (e.g. soil strength, interface adhesion and cell geometry) on the stress-strain behaviour of the soil adjacent to a penetrating spade cell.
Parallel numerical fluid flow and soil penetration analyses were conducted to investigate the stress-strain changes that occur around a spade cell during penetration. These analyses were used to assess the influence of various parameters on soil behaviour for a three-dimensional penetration problem.
The results of these analyses showed that: (1) the shape of the spade cell’s tip influences the strains generated around the spade cell; (2) the strain path method is capable of predicting soil deformation in deep three-dimensional penetration problems; (3) the deformations generated around the spade cell can only be successfully evaluated by performing three-dimensional analyses; (4) the stress-strain changes generated in the soil adjacent to the spade cell are influenced by to the soil undrained shear strength, soil shear modulus, interface adhesion, and the aspect ratio of the spade cell; (5) the influence of adhesion on deformations in soil penetration analyses is similar to the effect of viscosity in fluid flow analyses; (6) the horizontal stress distributions are relatively uniform along the inner-half of the spade cell width; and (7) horizontal stresses on the spade cell face at the end of penetration are higher in models where the boundary parallel to the spade cell face is displacement-controlled (rather than stress-controlled). It was concluded that the relative influence of various parameters on the spade cell measurements should be considered in comparing the in-situ stresses measured by spade cells in various field and chamber tests.
Text
1000037.pdf
- Version of Record
More information
Published date: 2006
Identifiers
Local EPrints ID: 465827
URI: http://eprints.soton.ac.uk/id/eprint/465827
PURE UUID: ab6b50f0-a2d8-44e4-858e-3205a7808079
Catalogue record
Date deposited: 05 Jul 2022 03:13
Last modified: 16 Mar 2024 20:23
Export record
Contributors
Author:
Siavash Farhangi
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics