Residential tower Hoog aan de Maas
D3BN (DHV Bouw
en Industrie BV, Rotterdam)
PO Box 2078
3000 CB Rotterdam
the Netherlands
Tel.: +31 10 404 40 40
Fax: +31 10 414 39 75
Contact:
M.
Winifred van den Bosch
Email:
Webstite:
Partners
Developers
Johan
Matser
Project
Development,
Hilversum;
AM
Development,
Gouda;
Bouwfonds Property Finance,
Hoevelaken
Architects
01-10
Architecten,
Rotterdam;
Philip
Johnson Alain Ritchie,
New York
Structural engineers
D3BN,
DHV
Building
and
Industry,
Rotterdam
Building contractor
J.P. van Eesteren BV, Rotterdam
Projectteam D3BN
Consulting engineer
Ir. J.G. Kraus
Projectmanagers
Ing. R.Stark; Ir.
A.F.R.M. Engels
Structural engineers
Ir.
W.H.G. van den Bosch; Ir.
H.J. Kuijer
D3BN civil engineers, DHV Building
and Industry
General
D3BN
Civil
and
Structural
Consulting
Engineers
was founded in
1916
and
designs, draws, calculates and supervises
the execution of load-bearing structures of
concrete, steel,
wood and glass in utility
building and housing.D3BN forms part of
the advisory group DHV. In this
way our
alertness is increased as far as multi-discipli-
nary projects are concerned and it also
offers access to the international
market.
Since
November 2004,
D3BN uses the
name of its parent company:
DHV Building
and Industry.
Innovative and customer-oriented
D3BN is active in the highest segment of the
architectural
market ranging from office
buildings to museums and from housing to
high-rise buildings.
D3BN leads the way as
far as developments in society are con-
cerned such as
multiple use of capacity,
durable building, accountable and environ-
mentally friendly use of materials. Still, for us,
construction is never a target on its own:
we
explicitly offer our knowledge and creativity
to the client and construction team.
Process and teamwork
We are deeply convinced of the importance
of combined action in design, architecture
and user demand and its impact on the
quality and durability of buildings and infra-
structure.
During the last few years, in addi-
tion to the technical challenges, there has
been more and more emphasis on innova-
tion in building and design processes. That’s
our main goal.
Organization
D3BN civil engineers has 85 employees and
has offices in Rotterdam, The Hague and
Zaandam. The way of ensuring the quality
of its work is founded in a book of quality
that is according to the code NEN ISO 9001.
The annual turnover of D3BN in 2004 was
approximately 6,5 million Euro.
Special Location
In Rotterdam on the river bank of the Maas a
high rise apartment building
with a special
quality will be built. The high rise forms one
part of a bigger project ‘High rise Boompjes’
which comprises three buildings and a parking
garage. The former office of the Bank of the
Netherlands
will be redeveloped, an office
tower for the company Ernst & Young is being
built and the construction of a 4 level under-
ground parking garage for 650 cars is in full
progress.
Shortage of space
Shortage of space is the keyword for this proj-
ect. There is almost no space for building the
office tower and the parking garage. For the
apartment building there is even less space. In
this part of Rotterdam on street level there are
just two small places of ground where there is
enough space to construct a foundation. The
rest of the structure cantilevers over the former
Bank of the Netherlands. This lack of space
demands an ingenious solution and first class
tools to design it.
The structure
There are just two points where the building
can touch the earth. This makes designing it a
challenge. The shape of the floor plan (a trian-
gle with the biggest part cantilevering over the
bank) makes it even more complex. Therefore
D3BN, together
with the rest of the design
team, designed a hybrid structure.
The first part of the structure is cantilevering
over the bank. This part is made as light as pos-
sible.
Hollow core plates realize a floor that has
a maximum span of 14 metres. In this way the
apartments are flexible in use, and the buyers
can choose their optimal arrangement of
rooms. The hollow core plates are situated on
steel beams that are placed in giant trusses.
These trusses cantilever almost 21 metres and
are 12 storeys high. The trusses rest on giant
concrete XX shaped columns next to the for-
mer Bank.
The second part is situated above a road. It
forms a bridge between the XX columns on
one side and the concrete core on the other
side of the road. This part is made heavier.
Here
no hollow core plates are used but
massive
concrete floors that have a maximum span of 9
metres. These concrete floors are also situated
on steel frames. These frames span from the
concrete columns next to the bank to the con-
crete core on the backside. The frame is formed
by a ‘vierendeel’ frame in the inner part and by
trusses in the facades.
A third part is called the ‘city apartment’
because these apartments are situated towards
the hart of the city. This part cantilevers above
the street. It has light hollow core plate floors
and steel trusses and ‘vierendeel’ structures in
the façade to bear these floors.The structure of
steel and concrete above the ninth floor rests
on two heavy concrete parts: a XX formed line
of columns next to the Bank and a core that is
situated next to the harbour. In this core there
is space for some extra apartments,
mechanical
and electrical installations and some storage
capacity. The columns and the concrete core
are 35 metres high.
Foundation
The foundation of the tower can also be con-
sidered hybrid. The towers balances on the line
of columns next to the Bank. Therefore the
loads on it are huge. Approximately 20.000
metric tons rest on these columns. To reduce
the settlement of the underground very long
piles have been designed. These piles have a
length of 56 metres. Their base rests on the
deep sand layer in the underground of Rotter-
dam.
Normally foundations in this western part
of the Netherlands reach to the second sand
layer, 20 metres below sea level.
Under this sec-
ond sand layer there is a thick layer of clay. This
clay has the characteristic to creep. Because the
tower has two foundation parts,
which have
complete different levels of load,
we do not
want this creep to occur. The long piles used
reach the third sand layer that is stiffer and
does not creep.
The concrete core holds the tower that bal-
ances on the XX columns in place.
Depending
on wind direction and the load factors used,
this core can be under compression or tension.
Therefore the core is prestressed (with steel) to
102
Company
Project
Residential tower Hoog aan de Maas
SCIA User Contest 2005 / Commercial and industrial building
3
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