used a large scale laboratory testing system to investigate the influence of the soil parameters including particle size and relative density and in situ stress conditions as well as the vibratory hammer
consisting of bias weight, eccentric moment, and the frequency on the penetration rate of piles and found that the relative density of soil has the greatest influence on the rate and the optimum frequency is 20 Hz.
* (Preferred) ASTM D 7382 Test Method for Dry Density of Granular Soils Using a Vibratory Hammer
The parameters of the utilized vibratory hammer
are as follow: the total eccentric weight was 3.88 kg and eccentricity of the eccentric weight was 0.029 m; the common mass of vibratory hammer
amounted to 67.7 kg.
The dynamic force of the vibratory hammer
was defined from the manufacturer's data (see Table 2), i.e.
pgrade of ready-mix batching plants, asphalt plants and commercial pump systems using PLC and VFD-based control panels from Siemens and Rice Lake; Foundation equipment like vibratory hammers
, piling rigs, diaphragm wall cutters, anchor rigs, from ICE, Casagrande, Italy;