Vibro stone columns

GROUND IMPROVEMENT
Vibro stone columns
ROGER BULLIVANT LIMITED
T. 0845 838 1801
www.roger-bullivant.co.uk
R
186
Commercial
Introduction
1866
Vibro stone columns are
inclusions of a granular material
which are formed in the ground,
improving the load bearing
capacity and limiting both total
and differential settlement.
1866
Stone columns can be installed
in groups under isolated loads or
directly under linear loads such
as strip footings. Columns can
also be arranged in a grid pattern
to provide support to uniformly
loaded structures such as ground
floor slabs and embankments.
1713
1985
1866
1713
Stone columns are suitable for
the improvement of both weak
natural soils and made ground
with typical improved bearing
capacities ranging from:
50kN/m2 to 150kN/m2.
1985
Method
Stone columns are formed
using a hydraulic vibrator
which transmits vibrations to
the ground by way of a poker.
Roger Bullivant Limited utilises its
own fleet of in-house designed
specialist plant which is equipped
with variable moment vibrators
which minimise the transmittance
of unwanted vibrations.
1985
1866
1713
1567
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713
1000
The vibrating probe is inserted
into the ground to the design
depth. The probe displaces the
existing soils and forms a void.
1713
R
1713
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Ground Improvement
1893
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The probe is wi
void is charg
Reintroductio
compacts the
into the surr
AWING
PLEAS
E ALLO
S ARE
66
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IED UP
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2.) EN
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DEPTH
NHBC.
EXCAV
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E
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V
3.) WH
ER
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DE
FOUND
AT
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Infrastructure
• Embankments
• Roads/car parks
© Radleigh Homes
4.) PR
IOR T
IS ESS
ENTIA
AND R
OLLED
5.) CLIE
NT TO

CENTR
E
FOUND L
A

CENTR T
E

SPRAY P
LIN
25
INDICA
TE
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/2/151
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Advantages
COLU
FOUND
SLAB
TOTAL
1302
1567
1866
1302
REV
DATE
CLIENT
Repeated compaction of the
column forms a granular
inclusion with high stiffness,
shear strength and good
drainage properties.
1567
DRAW
ROGER
A
BULLIV
GROUN
D IMP
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ithdrawn and the
ged with stone.
on of the probe
stone, forcing it
rounding soil.
QUEST
OR ISS
1866
Residential
• Housing
• Care Homes
• Reduced settlement in compressible
soil layers facilitate use of shallow
footings and ground bearing floor
slabs in soft soils.
• Increased bearing capacity resulting
1565
in less concrete in the foundations
1565
• High production rates
• Immediate follow-on for construction1565
of foundations / floors
• Displacement process with no spoil
to cart away
• Not weather dependent
• Cost-effective
• Viable alternative to piling
ON RE
DAYS F
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Industrial and commercial buildings
Distribution warehouses/centres
Hospitals
Schools
Hotels
Utilities
• Sewage treatment plants
• Sub-stations
RKING
Residential
Applications
•
•
•
•
SUPPL
NORTH
T: 0177
2 3233
85
www.ro
NEW H
OU
MIDLAN SE
DS
ger-bull
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Typical Installation Process
Completed stone columns; trench to finished
foundation level (foreground), with concrete
blinding (background).
Finished strip footings; typically 600mm wide by
750mm deep.
Steel reinforcement (normally mesh), placed on
spacer blocks on blinding layer.
Substructure blockwork (insulated trenchblock)
and drainage/service duct tails.
Midlands & South
Walton Road
Drakelow
Burton on Trent
DE15 9UA
T 01283 505458
info@roger-bullivant.co.uk
R
North
Club Street
Bamber Bridge
Preston
PR5 6FN
T 01772 323385
info@roger-bullivant.co.uk
ROGER BULLIVANT LIMITED
T. 0845 838 1801
www.roger-bullivant.co.uk
Scotland
The E Centre
Cooperage Business Village
Cooperage Way, Alloa,
Clackmananshire FK10 3LP
T 01259 272050
info@roger-bullivant.co.uk