Investigation of the influence of wave propagation on adjacent piles during pile driving-PPT Presentation

PPT Presentation

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The study investigates how vibrations generated during Franki-pile installation propagate through the ground and affect neighboring piles, particularly young concrete. A large-scale field test in Hamburg monitored 13 piles arranged in three groups, with pile depths of 10–12 m and spacing of 2–5 m.<br /><br />Measurements included subsurface vibration velocities, acceleration at the driving-pipe head, and acceleration and strain in neighboring piles. Data were recorded at 2,000 Hz during pile driving, which lasted about an hour at roughly 10 impacts per minute.<br /><br />Ground vibration velocity decreased with increasing distance from the driven pile and was broadly consistent with estimates based on DIN 4150-1. The highest reported velocity was 8.7 mm/s at 15 m. This is below the approximately 20 mm/s level cited in the presentation as unlikely to harm young concrete strength. Responses measured on neighboring piles varied with factors including distance and concrete age.<br /><br />The researchers conclude that the field measurements provide a basis for assessing vibration effects on adjacent piles. Ongoing and future work includes systematic evaluation of the tests, development and validation of a numerical model, parametric studies, comparison of pile-installation methods, and laboratory assessment of how measured accelerations affect fresh concrete during curing.

Keywords

Franki pile installation

ground vibration

pile interaction

young concrete

field test

Hamburg

vibration propagation

DIN 4150-1

acceleration measurement

pile driving