VSP
Intitulé du projet de recherche: Analyse et modélisation de la génération du bruit lors du vibrofonçage de palplanches et détermination du potentiel d’optimisation (VSP)
Référence : F1R-ING-PAU-06VSPA
Chef de projet: Arno Zürbes
Équipe des chercheurs: Vincent Hanus (Doctorant), Stefan Maas, Danièle Waldmann
Domaine de recherche: Engineering/Construction and Design
Durée du projet: 01.10.2006 - 30.09.2009
Partenaires: ARCELOR Profil, Esch/-Alzette, TU Darmstadt
Objectifs: The aim of the project is to investigate the generation of noise during the vibratory pile driving of sheet piles. The project is launched together with the company ARCELOR Profil and the Fachgebiet für Mechatronik und Maschinenakustik of the Technische Universität Darmstadt. The potential for the acoustic optimization of this construction method should be found out and measures to reduce the noise level should be proposed.
Motivations for the research project are two contradictory tendencies in the recent past and the future:
1. Reduction of the legally permitted acoustic emissions on construction sites
2. Increase of the actual noise levels because of thinner and wider sheet piles, which are being developed to improve the efficiency and the competitiveness of this construction method
From these two points it may occur that the activities on the construction site must be limited or even interrupted, so that the economic value of vibratory sheet pile driving is reduced. Therefore ARCELOR Profil as a leading producer of sheet piles is very much interested in the acoustic optimization of this construction method.
Résultats: The measuring equipment to treat the subject was purchased and tested, especially a system ‚Acoustic Camera’. Furthermore the natural vibrations of a sheet pile were investigated experimentally by modal analysis and theoretically by means of finite elements. The correlation between measurement and calculation was good.The next steps to be carried out are noise measurements on construction sites under real conditions to find out the main sources of noise generation. These sources should be introduced into the calculation model in order to predict the level of sound emissions resulting during vibratory pile driving.
