Hydroschall- und Erschütterungsabstrahlung von Offshore-Monopfahlgründungen im Impulsrammverfahren

During the installation of pile foundations for the offshore wind farm Amrumbank West, the new noise mitigation system Hydro Sound Damper (HSD) was used besides the single and double big bubble curtain. To determine the wave propagation and the efficiency of the different noise mitigation methods the Institute of Foundation Engineering and Soil Mechanics of Technische Universität Braunschweig (IGB‐TUBS) carried out extensive measuring campaigns. During these campaigns a dense matrix of hydrophones in different water depths and also geophones on the sea bed in distances between 25 and 1500 m from the pile was installed to determine the effects of the different combinations of noise mitigation systems. Additionally the pile itself was instrumented with sensors. Based on these measurements the wave propagation in pile, water and soil is investigated and the efficiency of the noise mitigation measures in different distances to the pile and over the most important frequency range is determined.