Soil displacements due to pile driving in remoulded medium plasticity clay investigated through model tests

Publikation: KonferencebidragPaperForskningpeer review

When precast displacement piles are driven into saturated medium to high plasticity clays, constant volume soil displacements will occur both horizontally and vertically in the ground surrounding the piles. The displacements may potentially have undesirable consequences for surrounding structures, which is why the displacements are often sought reduced. Pre-augering is commonly used in connection to pile driving to achieve this. The general knowledge of soil displacements due to pile driving in clay in connection to installation of pile groups and the effect of pre-augering is limited.
In this study the process and magnitude of soil displacements in connection to pile driving are studied through model tests. An experimental setup is designed in which soil displacements, around a single pile and around a pile group, are examined. Wooden model-piles are driven into remoulded medium plasticity clay, and movements of the clay surface are registered both horizontally and vertically after installation of each pile using predefined measurement points. To investigate the influence of pre-augering model tests both with and without pre-augering are carried out.
The results from the model tests are analyzed in order to describe the mechanisms, which occur during pile driving and to determine the patterns and magnitude of soil displacements as well as the reducing effect of pre-augering. A detailed description of the soil movements is presented and parameters of influence are identified.
OriginalsprogEngelsk
Udgivelsesår2019
StatusAccepteret/In press - 2019
Begivenhed17th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE) - Conference Centre Harpa, Reykjavik, Island
Varighed: 1 sep. 20196 sep. 2019
https://www.ecsmge-2019.com

Konference

Konference17th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE)
LokationConference Centre Harpa
LandIsland
ByReykjavik
Periode01/09/201906/09/2019
Internetadresse

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