Analysing hammer impact duration on driveability resistance through instrumented field tests
S. Banaei Moghadam (TU Delft - Civil Engineering & Geosciences)
K. Duffy (TU Delft - Civil Engineering & Geosciences)
L. Flessati (TU Delft - Civil Engineering & Geosciences)
K. Gavin (TU Delft - Civil Engineering & Geosciences)
C.J. Stokman (IHC IQIP)
Jort van Wijk (IHC IQIP)
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Abstract
To reduce noise and minimize fatigue damage during pile driving, a new installation method has been developed that differs from conventional pile driving with high-frequency impact blows. This method prolongs the hammer blow, causing a slower pressing force. As a result, it reduces stress waves and imposes a quasi-static loading process on the pile. Consequently, this approach may induce different soil response phenomena compared to conventional pile driving. For instance, friction fatigue is a well-known phenomenon whereby the shaft resistance during installation is affected by cyclic loading and geometrical effects. With this in mind, this paper presents field tests on a pile installed with this new piling method in the port of Rotterdam. Using this field test data, this research will explore the differences in soil response between the prolonged-blow installation technique and conventional driving methods, focusing on friction fatigue.