Stress changes due to shape effects in the construction process of pile walls
Stress changes due to shape effects in the construction process of pile walls
The shaft friction of displacement piles in sand depends on the change in the horizontal stresses on the pile shaft during installation. Recent research has revealed that the sectional shape of a pile has a strong influence on the horizontal stresses, leading to great difference of the pile shaft friction. Based on these findings, an optimization idea has been proposed, referred to as the “switched-on mechanism”. The main emphasis in this paper is given to understanding the changes in horizontal stresses measured during “switching-on” from open-section (installation individually) to closed(load testing for whole pile walls) in cross section. In order to model the construction and load test process for pile walls, a dual installation system was installed into the beam centrifuge. This paper discusses the stress changes through the whole construction process and the efficiency of the switched-on mechanism, and highlights how physical modelling has allowed this highly complex problem to be quantified.
International Press-in Association
Taenaka, Shinj
0e1b2f94-4a47-4ce6-83c8-5b5341627785
White, David J.
a986033d-d26d-4419-a3f3-20dc54efce93
Randolph, Mark F.
75caa33a-e630-4ae8-84cd-758797bf9633
September 2018
Taenaka, Shinj
0e1b2f94-4a47-4ce6-83c8-5b5341627785
White, David J.
a986033d-d26d-4419-a3f3-20dc54efce93
Randolph, Mark F.
75caa33a-e630-4ae8-84cd-758797bf9633
Taenaka, Shinj, White, David J. and Randolph, Mark F.
(2018)
Stress changes due to shape effects in the construction process of pile walls.
In Proceedings of the 1st International Conference on Press-in Engineering 2018.
International Press-in Association.
9 pp
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
The shaft friction of displacement piles in sand depends on the change in the horizontal stresses on the pile shaft during installation. Recent research has revealed that the sectional shape of a pile has a strong influence on the horizontal stresses, leading to great difference of the pile shaft friction. Based on these findings, an optimization idea has been proposed, referred to as the “switched-on mechanism”. The main emphasis in this paper is given to understanding the changes in horizontal stresses measured during “switching-on” from open-section (installation individually) to closed(load testing for whole pile walls) in cross section. In order to model the construction and load test process for pile walls, a dual installation system was installed into the beam centrifuge. This paper discusses the stress changes through the whole construction process and the efficiency of the switched-on mechanism, and highlights how physical modelling has allowed this highly complex problem to be quantified.
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Accepted/In Press date: 10 May 2018
Published date: September 2018
Venue - Dates:
1st International Conference on Press-in Engineering 2018: ICPE 2018, , Kochi, Japan, 2018-09-19 - 2018-09-21
Identifiers
Local EPrints ID: 422526
URI: http://eprints.soton.ac.uk/id/eprint/422526
PURE UUID: b4adb1aa-5dbc-4a10-a910-d6a844c1faca
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Date deposited: 25 Jul 2018 16:30
Last modified: 16 Mar 2024 04:32
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Author:
Shinj Taenaka
Author:
Mark F. Randolph
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