Power transfer and vibrator-pile-soil interactions within the framework of vibratory pile driving
(2011)
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- Authors
- Supervisors
- Holeyman, Alain
- Abstract
- (en) The vibratory driving technique is used for driving piles and sheet piles into the ground, by imparting to the profile a longitudinal vibratory motion. Performance of the technique results from interactions between the driving unit, the pile and the soil. The objective of the present thesis is to develop a better understanding of those interactions. The research is based on a detailed study of experimental results, consisting in full scale vibratory driving tests and experience databases. A large amount of data was available thanks to the partners (and other participating organizations) of this research (BBRI, Arcelor-Mittal, Deltares, LCPC). A new full scale test campaign was also conducted in Limelette (Belgium) for investigating specific questions such as the influence of vibratory parameters and sheet pile movements on the efficiency of the technique, in terms of both driving time and power consumption. Analysis of the experimental results has allowed some shortcomings in the current methods addressing pile vibrodrivability to be identified. Shortcomings are mainly related to the assumptions regarding the vibratory action actually applied to the pile (force and frequency), the (sheet) pile movement, and the definition of soil parameters. The second part of the thesis is devoted to the improvement of vibrodriving prediction methods based on theoretical and experimental conclusions. In particular, suggestions are made to correct the definition of the vibratory force and to account for the possible influence of power limitation coming from the power pack. In that process, the definitions of the soil parameters are revisited based on the literature and experimental studies. Also the possibility of extending vibrodriving models for the prediction of power consumption is investigated, as well as the possibility to override the rigid body assumption through use of the finite element approach.
- Affiliations
Citations
Whenham, V. (2011). Power transfer and vibrator-pile-soil interactions within the framework of vibratory pile driving. https://hdl.handle.net/2078.5/154169