Field measurements of airborne noise emission during impact piledriving on land and the effect of a reduced stiffness at the impact interface-PPT Presentation

PPT Presentation

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The presentation reports field measurements of airborne noise during impact pile driving on land and examines the effect of cushioning the hammer–pile interface with a hydraulic spring element called PULSE.<br /><br />Noise levels can be affected by factors including pile height, impact energy, distance from the source, blow count, and impact characteristics. The measurement compared seven pile segments, each 12.3 metres long, driven under consistent conditions: 80 kJ hammer energy, a blow count of 40 blows per 25 cm, and a constant PULSE setting.<br /><br />The cushioned impact produced lower peak forces and reduced noise across the frequency range. The reported total noise reduction was 8.2 dB over the measured driving length. However, reduced stiffness at the impact interface can make piles harder to drive. The presentation estimates that up to 30% more impact energy may be needed, potentially increasing noise by 1.5 dB and partly offsetting the mitigation benefit.

Keywords

airborne noise

impact pile driving

PULSE hydraulic spring

noise reduction

hammer-pile interface

field measurements

peak forces

impact energy

pile driving noise

cushioned impact