Piling equipment and methods 95Table 3.5Continued
Maker Type Frequency Mass Minimum
range (kg) power supply
(Hz) (KVA)
1423C 38 1700 209
423 38 3750 320
14RF 38 2420 213
23RF 38 3900 287
28RF 38 3800 417
36RF 33 3900 431
64RF 32 5000 663
44-50 27 5487 429
1412Btandem 22 13 900 1193
P.T.C. (France) 7H5 33 650 50
15H1 28 1250 108
25H1A 29 2200 153
30H1A 28 4120 193
50HD1 25 3100 255
60HD 28 4900 305
75HD 25 11 800 410
100HD 23 8200 451
175HD 23 13 000 611
265HD 23 19 500 988
7HF3 38 900 92
15HF3 38 1300 210
30HF3 38 2400 292
46HF3 38 7400 447
10HFV 38 1500 95
15HFVS 38 2210 200
23HFV 38 3610 222
34HFV 38 5000 405
60HFV 38 6360 425
60HFVS 38 6360 662
Soilmec (Italy) VS-4 30 1138 135
VS-8 30 1901 277
VS-16 30 3500 554
Notes
V Generally denotes variable moment vibrator.
a Mounted on excavator dipper arm.
b Ring vibrators with variable moment (total weight).
technique the vibrator forms a hole by compacting the soil to the required depth which is
filled with graded stone and then compacted in lifts by the vibrator to form ‘stone columns’.
This process has been extended whereby concrete is injected into the hole at the tip of the
poker and vibrated as it is withdrawn to provide a form of ‘pile’(or ‘vibro-concrete column’)
capable of carrying light loading when taken down to a competent stratum.
Types of vibrators suitable for driving bearing piles are shown in Table 3.5.
3.1.6 Selection of type of piling hammer
The selection of the most suitable type of hammer for a given task involves a consideration
of the type and weight of the pile, and the characteristics of the ground into which the pile