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ZBLIN GROUND ENGINEERING
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www.zueblin.de
SETTING STANDARDS
Rising to this challenge has made us the Number One in building construction and
civil engineering in Germany. We offer our clients a comprehensive range of servicesfor construction projects of any type or size; and we have done so for 110 years
with demanding projects around the globe. For us it is important to always find the
best customised solution and to make construction projects a success in terms of
technology as well as economical efficiency. In the field of partnering models we
have developed the tried and tested Zblin teamconcept. It provides for modern
contracts and allows for a professional project execution: from planning, financing
and construction, all the way to operation.
Zblins success is driven primarily by the know-how and innovative strength of
our staff. In a combined effort, top-qualified engineers, business economists and
scientists develop and enhance forward-looking and innovative technologies. With
this technical excellence we create individual and future-oriented solutions tailoredto the needs of our clients.
With our outstanding engineering services and the professional and detail-oriented
handling of projects we are setting standards, every day. Our affiliation with
STRABAG SE, one of the leading European construction groups, adds further
strength to our market position.
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ZBLIN GROUND ENGINEERING
FUNDAMENTAL MASTERPIECES
Building in and with the subsoil has always been a special engineering challenge.
In this field, a lot of experience is called for, as well as the permanent readinessto get to the bottom of things on site every time afresh. Our top priority is to
always find the best solution in terms of economical efficiency as well as technology
while we are simultaneously striving to avoid risks and to work safely.
The highly qualified geotechnical experts among the 300 engineers of Ed. Zblin AGs
central engineering division Zentrale Technik form well-attuned teams with our
site supervisors, who are experienced in building in Germany and abroad. In this
manner, we manage to combine expert knowledge with practical experience in the
offices and on site. Structural analyses and working drawings as well as construction
and time schedules, work techniques and use of staff and equipment are all worked
out, coordinated and optimised by one team.
110 years of international ground engineering experience have so provided us with
a high standard of competence to solve even the most demanding construction
problems. And thats what our clients benefit from every day, in Germany and
abroad.
Cover image: Construction pit Spreedreieck,
Berlin
1 Sderstrmstunneln, Stockholm
2 Saadiyat Bridge, Abu Dhabi
3 Pile drilling rig
4 Underground line U4, Hamburg
5 Trench grab
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WHAT WE OFFER diaphragm walls
piles
retaining walls
grouting
ground anchors
turnkey construction of excavation pits
immersed tunnels
soil freezing
pile driving
geothermal engineering
offshore wind
planning and design
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TYPES reinforced concrete diaphragm walls
single-phase cut-off walls
double-phase cut-off walls
thin cut-off walls
barrets
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DIAPHRAGM WALLS
EXPERIENCE COUNTS
Diaphragm walls of all kinds, sometimes in combination, are used as massive
supporting systems for construction pits, as load-bearing foundation elements,or for ground water sealing purposes.
They can be built very close to existing structures and are known for their good
water impermeability even if the ground water table is high.
Every year, we build some ten thousand square meters using this technique. Our
typical clients for diaphragm walls are investors in urban building projects with
difficult subsoil conditions, landfill operators, yet also public authorities in charge
of large infrastructural projects.
1 Underground line U4, Hamburg
2 Diaphragm wall equipment
3 Coal-fired power station EnBW,
Karlsruhe
4 Staten Tunnel Randstad Rail, Rotterdam
5 Diaphragm wall reinforcement
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PILES
A SOLID BASIS
Zblin Spezialtiefbau has the equipment for all installation methods for bored piles,
from those of largest diameter to micro piles. Appropriate subsoil conditionsprovided, our driven piles might also be a quick and, thus, economical alternative
for foundations that have to carry even the heaviest loads.
We also have the special means and experience to build additional foundations for
existing structures and in situations of constricted height.
By placing piles side by side, large-diameter bored piles can form entire pile walls
that serve as almost impermeable and rigid retaining walls for construction pits.
Our testing facilities allow us to examine test piles prior to actual construction in
order to economically optimise the foundation design for our clients.
1 Torch Tower, Dubai
2 IKEA, Frankfurt am Main
3 OpernTurm, Frankfurt am Main
4 Pile wall Hschi, Switzerland
5 Pile load test6 Soil auger
7 Saadiyat Bridge, Abu Dhabi
TYPES large-diameter bored piles (using drill
or grab)
micro piles
RI-piles, MV-piles
in situ continuous flight auger piles
driven piles
pile load testing
stone columns
replacement drillings for rehabilitations
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TYPES bored pile walls
reinforced concrete diaphragm walls
sheet pile walls
soldier pile walls
shotcrete soil nailing
element walls
combi-walls
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RETAINING WALLS
ROOM FOR NEW THINGS
Where the requirements as to water tightness and deformation behaviour are
not so stringent we recommend other retaining systems that we offer aside fromdiaphragm and pile walls:
Sheet pile walls consist of individual steel sheet piles, connected by clutches,
which can be built faster than anything else, provided that the subsoil allows for
easy driving. If the piles can be retrieved after construction, this method is also
highly cost-efficient. When reinforced with pipes and beams, sheet pile walls are
able to bear extreme loads. They are used predominantly in hydraulic engineering.
The use of soldier pile walls is a traditional retaining method. The modern approach,
to keep vibration to a minimum, is to install the steel beams in pre-bored holes.
As excavation proceeds, the spaces between the beams are filled with squared
timber or reinforced shotcrete.
Our preferred method of securing steeply sloping areas is by way of soil nailing
using steel bars installed into pre-drilled holes and grouted into place. In this way
the ground is being reinforced and turned into a monolithic block. The exposed
slope surface is sealed step by step with a reinforced shotcrete facing.
Element walls are another means to retain steep slopes. Such walls consist of
steel tendons, which are tied back in the deeper subsoil and prestressed against
the individual concrete elements on the slope surface.
1 Olgahospital, Stuttgart
2 Hchst bypass on highway B 45
3 Soldier pile wall
4 Non-contiguous bored pile wall
5 Sheet pile wall
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1 Sleeve grouting
2 Compensation grouting in the shaft
3 Grouting equipment
KNOW-HOW THAT IS IN DEMAND
Soils can be improved by injecting various environmentally compatible grouts.
This is done for various purposes:
For the enhancement of soil stability, e.g. on sliding slopes or to underpin
adjacent structures, for settlement compensation, i.e. the compensation of
harmful settlements by way of introducing additional volume into the subsoil,
or for the improvement of water tightness, e.g. to create horizontal base seals
for construction pits.
Comprehensive and time-consuming water extraction permit procedures,
together with high extraction and discharge fees, can be avoided, in particular
in the latter case, if the inflow of groundwater into the construction pit is kept to
a minimum.
As a leading player in this field, we are also active in introducing standards for
special grouting methods within the framework of the European standardisation
activities.
To control compensation grouting, Zblin developed the SOFIA software. The
control system of the software is fed by information from the water level gauge
system and data from the completed grout injections. These pieces of information
are automatically processed by the software, are visually displayed and are
archived in a database. The structure of this database enables site supervisors
to produce standardised and auditable reports of grouting work (in the form of
tables or charts) for the client.
GROUTING
TYPES high-pressure grouting (jet grouting)
low-pressure grouting
soft gel grouting
cement and fine-cement grouting
compensation grouting
liquid plastic grouting
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GROUND ANCHORS
FIRMLY ANCHORED
Ground anchors are prestressed tendons made of steel strands or bar steel which
are installed in and grouted into bore holes. They serve as temporary or permanentmeans to accommodate high tensile loads in the ground and are used for
construction pit retaining walls, for securing structures against uplift through ground
water, for slope retention and for reaction force application in pile test loading.
The strengthening of dams with high-capacity anchors is also part of our service
range as are high-pressure-grouted bar anchors.
1 Tied-back bored pile wall
2 Anchor drilling rig
3 Pre-stressing jacks
TYPES temporary anchors
permanent anchors
multi-strand anchors
uplift anchors
shotcrete / soil nailing
bar anchors
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UNCONVENTIONAL SOLUTIONS
In certain cases, special construction methods are used, for which we are well
prepared in terms of technical equipment:
Soil freezing uses a coolant circulating in pipe systems installed in the subsoil.
This coolant makes the water in the subsoil freeze. The strengthening and sealing
effect of the ice is used, for instance, for building cross passages in underwater
tunnelling or for cleanup works, in order to bind volatile hazardous substances
in the ground.
Controlled horizontal directional drilling (HDD) is used to create long-distance
connections without harming landscape surfaces in-between. Hence, this method
is used to underpass structures, rivers or special facilities, like nature reserves,
airports or railway tracks. HDD helps to minimise intrusions, which would
otherwise be unavoidable, together with the costs thereby incurred.
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SPECIAL ENGINEERING
1 Offshore wind measurement mast,
Arkona, Lubmin
2 Ground freezing tunnel, City-Tunnel,
Leipzig
3 Deep boring for geothermal energy
4 Translocation of Kaisersaal, Berlin
5 Hazardous waste landfill, Klliken
(Switzerland)
TYPES soil freezing
horizontal directional drilling (HDD)
deep boring (geothermal engineering)
translocation of structures, tunnels, etc.
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In times of rising energy prices and ever scarcer resources, the use of geothermal
energy is strongly gaining in importance. The enormous potential of this type of
energy for heating, cooling and energy storage is continuously being increased
through R&D. With our deep boring equipment we are in a position to offerexploration drillings down to reservoirs in depths of up to 1,000 m and production
drillings down to 1,500 m.
Another type of regenerative energy production is offshore wind power plants.
We have been developing foundation elements for these in a specialised business
unit and have already installed them successfully.
In the preservation of historical monuments, translocation describes the documented
dismantling and later as true to original as possible re-assembly of a historical
building in another location. This is done especially in cases where cultural
monuments stand in the way of construction projects. We have developed a much
gentler alternative: We just move the complete, bared object on special sliding waysto its new location. We even offer complicated underwater tunnel translocations in
one comprehensive approach. This helps to massively reduce traffic obstructions
in inland navigation.
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TYPES infrastructure projects
hydraulic engineering
immersed tunnels
turnkey construction of excavation pits
(including foundation slab systems)
project management
underwater concrete slabs
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LARGE-SCALE PROJECTS
HIGH-QUALITY
COMPREHENSIVE SERVICE
Clients who are realising large-scale infrastructure projects with their numerous
interfaces between the individual contractors face enormous challenges in terms
of coordination efforts and risks. For them it is much more cost-efficient and
much easier to award the contract for all works to one single group of affiliated
companies.
In particular when it comes to large construction pits, the turnkey construction
of the pit, complete with a base slab anchored down against uplift provides an
attractive alternative for the client with regard to the time won for the award of the
further structural works.
However, this requires a partner with all the necessary financial, technical andhuman resources who is in the position to carry out such large-scale projects
within the scheduled time and in the desired quality.
Here it comes in handy to have a partner which belongs to one of Europes leading
construction groups, and which is a one-stop-provider for the entire project all
over the world.
1 OpernTurm, Frankfurt am Main
(2008 Tishman Speyer Properties)
2 Frankfurt cloverleaf underpass new
ICE line Cologne Frankfurt
3 Teltow Canal, Berlin4 Tjuvholmen, Oslo
5 Construction pit EZB, Frankfurt am Main
6 Construction pit City Gate, Bucharest
7 New Theatre and Opera House,
Copenhagen
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Zblin Spezialtiefbau GmbH
Albstadtweg 1
70567 Stuttgart / Germany
Tel.: +49 711 7883-0Fax: +49 711 7883-273www.spt.zueblin.de
Germany: Berlin, Dresden, Duisburg, Hamburg, Stuttgart
Austria, Denmark, Norway, Romania, Russia, Sweden, Switzerland, United Arab Emirates