36 Ground improvement by deep vibratory methods
Table 3.1 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
Betterground
B 12
292
94
50
170
9
hyd, c
B 27
354
140
30
270
24
el or hyd, c
B 41
390
210
30
410
42
el, c
B 54
460
360
30
842
54
el, c
Keller Group
MB 1670
315
70
50–60
157–226
7
el, v
LB 20100
315
100
60
201
5
el, c
S 340/34
421
120
30
340
29
el, c
S 700
490
290
25–38
742–690
50/15
el, v
N-Alpha
259
60
60
130
6
hyd, c
Bauer Gruppe
TR 17
298
96
≤53
≤193
12
hyd, v
TR 75
406
224
≤33
≤313
21
hyd, v
PTC
Fayat Group
VL 18
VL 40
VL 40S
VL 110
na
na
na
na
113
135
180
202
50
30
40
28
181
145
258
353
na
na
na
na
hyd
hyd
hyd
hyd
(Continued)