Abstract:
During piling activities, vibration is generated from the pile driver to the pile then
it transferred at the pile-soil interface. However, the level of ground vibration induced by
piling may depend on several factors including energy and distance from the vibration
source. The objective of this study is to investigate characteristics of ground vibration that
propagate during piling to be done by two different types: bored pilling and impact pilling.
Change in characteristics of ground vibration with the distance from the pile driver was
also investigated.
Two bored piling sites and an impacted piling site were selected for this study. In the
selected piling sites, ground vibrations were measured at 5m, 10m, 15m and 25m distances
from the source in three radial directions by using a four channel seismograph. It was
found that, for both types of pilling, magnitude of the vibration reduces with the distance.
Impact piling induces high magnitude and low frequency vibration whereas bored piling
induces low magnitude and high frequency vibration. In transverse direction, impact piling
induces a magnitude of 4.21mm/s (PPV) at a frequency of 20Hz, whereas bored piling
induces a magnitude of 0.92 mm/s (PPV) at a frequency of 36.5 Hz, at 5m distance from
the source. Characteristics similar to the transverse vibration were found in both vertical
andlongitudinal vibratio ns.
