Vibro compaction of granular soils 37
Table 3.1 (Continued) Selection of currently available depth vibrators (2015)
Specialist contractor
Machine type
Diameter
(mm)
Power rating
(kW)
Operating frequency
(Hz)
Centrifugal force
(kN)
Double amplitude
(mm) a
Special features
Balfour Beatty
Ground Engineering
HD 130
HD 150
BD 300
BD 400
310
310
310
400
98
130
120
215
50–60
50–60
30–36
30–35
140–202
200–288
175–252
310–426
16
22
28
34
hyd, v
hyd, v
hyd, v
hyd, v
Beijing Vibro
BJ426-75
BJ402S-180
426
402
75
180
30
30
270
380
14
22
el, c
el, c
Notes: c
= constant operational frequency, v
= variable operational frequency, el
= electric drive, hyd
= hydraulic drive.
a
At vibrator point.