MAKING A
GLOBAL IMPACT
INTERNATIONAL PROJECT
BSP INTERNATIONAL FOUNDATIONS LTD
Claydon Business Park, Gt Blakenham, Ipswich
Suffolk, UK, IP6 0NL
RIC (Rapid Impact Compaction)
Use your excavator for ground compaction work. Fast,
economical and dynamic ground compaction technique for
low cost ground improvement of non cohesive soils.
“Get more from your standard excavator!”
Tel: +44 (0) 1473 830431 Email: sales@bspif.co.uk
www.bsp-if.com
JX Piling RIG
Introducing the all new BSP JX25 piling rig based on a 20
tonne excavator. Designed for driving most types of
foundation piles.
“Light weight RIG packing a big punch!”
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Attenuation
Generally, the excavation of the panels is carried out using
a clamshell. However, due to the strength of the limestone
banks, a hydromill is also used to minimize the impact generated
by vibrations on neighbouring structures.
Large diameter bored piles ranging from 1,500 to 2,000
millimetres are used as foundation elements. In the upper
part, a temporary casing is used. Then, in the lower part,
uncased drilling is carried out using stabilizing bentonite
mud to reach a total drilling length of up to 50 metres.
After reaching the design depth, the reinforcement cage
is installed, then the cement is poured into the shaft. Since
the working level is significantly higher than the foundation
level, the reinforcement cage is placed up to 20 metres below
the working level.
Due to the selected top-down construction method, it is
necessary to position the plunged columns in the piles. Since
these prefabricated columns are not just temporary supports,
but are also used as permanent columns in the basement
floors, their installation requires meticulous precision.
Therefore, a maximum vertical tolerance of two centimetres
and a maximum horizontal tolerance of five cm was
allowed. For this reason, an innovative system is adopted
for this project. After reaching the design depth of the
pile, the reinforcement cage is installed, and subsequently
a collar and a sleeve are positioned around and into the
casing. The sleeve serves to guide the precast column and
support its assembly.
In the next step, the position of the sleeve is suitably
adjusted by using the adjusting screws on the collar in compliance
with the given tolerance requirements. After the
adjustment of the sleeve, the pile is backfilled with cement
using a tremie pipe and then the prefabricated column is
installed, guided by the sleeve, inserting it for three metres
into the fresh cement of the pile.
42 Q3 2020 www.pilingcanada.ca
/www.bsp-if.com
/www.pilingcanada.ca
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