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Roger Bullivant Ltd offers an impressive array of piling techniques that enable us to tailor our foundation systems to the needs of our clients. Our versatile range of products stem from the more traditional driven piling suite, comprising driven concrete piles, driven tubular steel and combination piles, to our vibrated or cast insitu piles such as our CFA or CHD piles. With the advent of our Continuous Helical Displacement pile, arisings have been virtually eliminated allowing significant savings to our client in muckaway costs and programme. With increased environmental awareness this piles is ideally suited to contaminated land or inner city projects where muckaway and treatment costs have been prohibitive to development.
With projects ranging in value from several thousand to a million pounds, we at Roger Bullivant Ltd are confident we can accommodate your piling needs and deliver the most cost-effective, value engineered solution to meet your construction programme needs.
This pile may be used for all types of structures and
foundations, from housing, through other forms of domestic building,
to commercial and industrial buildings and installations. The piles
can also be used for all types of civil engineering applications
from bridges to embankment support, power and transmission towers
and rail-related structures.
The RB Pre-cast Concrete Piling System
is quick to install and very cost-effective in most ground conditions.
This pile is environmentally attractive as no spoil or arisings are
generated from pile installation.
In its standard form the pile is
a compression pile with small tensile and bending resistance capability.
The design is however, easily adapted to accommodate larger tension
and bending forces. The standard segment lengths of 1.5m, 3m and
4m can be complemented as required by 6m segments and by tapered
lead sections or enlarged lead sections, as required.
RB pre-cast concrete piles are usually top-driven using hydraulic
drop hammers, some of which are supersilenced and are part of the
company’s fleet of remotely operated “Quiet” hammers.
Hammer capacities range from 1T up to 10T for our general purpose
low noise, low vibration hammers and can be mounted on a variety
of tracked or wheeled rigs, depending upon project location, type,
access and headroom constraints. All rigs are designed and purpose-built
in-house to meet specific site access and transportation criteria.
The smaller sizes of RB pre-cast concrete pile may also be jacked
into the ground using a totally vibrationless system utilising RB
in-house designed and built jack-down piling rigs. Quality assurance
procedures apply to pile manufacture and delivery, unloading, storage
and installation. RB pre-cast concrete piles are suitable for all
open, unrestricted site activities, however the variety of segment
lengths and existence of specialist equipment makes them ideal for
restricted access and low headroom applications.
General all purpose application for new and refurbishment
projects.
The piles are speedily installed and can cater for a variety
of ground conditions. They are cost-effective and can accommodate
large working loads, depending upon the ground conditions into which
they are installed.
The standard size range may be complemented with
intermediate sizes if required and pile lengths of up to 19m can
be constructed.
Standard reinforcement details are used where appropriate
which will comprise single centrally positioned reinforcing bars
or reinforcement cages as required to suit horizontal or bending
moment loadings. Special cages can be manufactured to suit specific
loading situations.
RB CFA piles are formed using hollow
stem auger boring techniques, which will produce arisings from the
bores in most UK ground conditions. Having produced a bore to calculated
depth through known strata, concrete is pumped into the bore under
pressure and continues to be pumped as the auger flight is lifted.
Concrete simultaneously fills the void left by the auger extraction.
The reinforcement is installed in the bore after the pile has been
concreted.
The company operates a fleet of bored piling rigs which
have the capability of installing computer-controlled continuous
flight auger (CFA) piles and sectional flight auger (SFA) piles.
These are suited to all types of conditions from open, unrestricted
access sites to very confined, low-headroom situations.
Whilst clearly being suitable for taking large axial loads,
these piles are particularly suitable for accommodating significant
horizontal loads and vertical tension loads, induced by large bending
moments/horizontal reactions and uplift/heave reactions respectively.
These piles are also very suitable for driving in difficult or uncertain
ground conditions up to 50m deep. Hard driving conditions and fill,
obstructions or boulders can also be dealt with using this system.
These piles are ideal where embedment is required on a steeply sloping
bedrock and supplemental rock-socketing by drilling through the end
can be achieved in extreme slope conditions or where load capacity
at rockhead needs to be increased.
These piles are top
driven to ‘set’ or length using purpose-built rigs with
hydraulic hammers. The internal void can subsequently be filled with
concrete or grout if required and reinforcement incorporated for bonding
into pile cap or ground beams. Normally the piles are driven open ended
so that a soil plug is rapidly formed. In exceptional circumstances
the open end can be closed using a welded end plate.
The site should be firm, dry, flat and level, and capable of sustaining
the load of the piling rigs which typically will weigh up to 35T. Access
roads must be suitable for normal delivery vehicles.
This type of pile can be used for all foundation applications
where bearing piles are required for either buildings or structures.
The pile may also be used where there is a retaining requirement. The
ability to form bored piles without producing any spoil makes this
kind of pile particularly advantageous on contaminated sites. There
is minimal vibration and noise.
In most ground conditions, this pile
is an ideal alternative to CFA (continuous flight auger). Enhanced
load carrying capacity may be achieved compared with CFA piles of similar
dimensions, due to compaction of the soil during boring. In some ground
conditions improvements of up to 30% have been demonstrated with a
consequential shortening of the pile and reduction in cost.
The piles are formed using a highly efficient multi-flight, bullet
ended shaft, driven by a high torque rotary head, enabling penetration
of the strata without bringing material to the surface. Data is recorded
using computerised instrumentation.
Nominal surface heaving may occur
but compared with the arisings from CFA boring, the volume is negligible.
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