November/December 2021 - 61

Aerial view of De Groene Boog project area
essential for the work, with the first
c h a l l e n g e b e i n g mi n imi z i n g
disturbances to a neighbourhood. To
reduce noise, Franki Grondtechnieken
is using pile drilling techniques where
possible, as well as noise reduction
equipment. The works include 8,850
grout-injected screw combi-piles, 2,500
precast piles, 75,000 sq m (18.5 acres) of
sheet piles, but also 665 micropiles
(60 m [197 ft] long) and 750 anchors. At
the project's peak, 14 drilling rigs were
needed to ensure target milestones
were reached. With this in mind,
preparation and logistics planning have
been crucial, for instance, to address the
200,000 trucks necessary only to bring
sand to the work sites.
Another challenge is the soil
constitution of the site, requiring the
Dutch subsidiary to continually adapt
working methods. The top soil layers
have required extra precautions to
ensure the stability of the foundation
rigs, involving 1,400 dragline mats to
sufficiently strengthen the surface.
Franki Grondtechnieken is proud to be
participating in this challenging,
exciting project.
Other members of the Franki
Foundations Group are working on big
developments. Atlas Fondations in
France is finishing some amazing works
on the Grand Paris Express underground
project; meanwhile, Franki Foundations
U.K. and Martello Piling are busy with
two new London skyscrapers that
include restricted access works; and
Franki Foundations Belgium, among its
numerous projects, is providing piling at
Doel Nuclear Power Station and completing
diaphragm walls on the new
metro line 3 in the very centre of Brussels.
Execution of De Groene Boog screwed in combi-piles
DEEP FOUNDATIONS * NOV/DEC 2021 * 61

November/December 2021

Table of Contents for the Digital Edition of November/December 2021

Table of Contents
November/December 2021 - Intro
November/December 2021 - 1
November/December 2021 - 2
November/December 2021 - Table of Contents
November/December 2021 - 4
November/December 2021 - 5
November/December 2021 - 6
November/December 2021 - 7
November/December 2021 - 8
November/December 2021 - 9
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November/December 2021 - 11
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