In the 20th district of Vienna, a new office center with almost 50,000 m² floor space is planned at the
location of Handelskai no. 92. The project consists of two structures connected by an atrium.
The north-western part features nine, and the south-eastern part 13 storeys. This results in heights of
31 m and 45 m. The base area is 140 m x 60 m.
Parking space is planned on three underground levels across the whole area.
The energy demand is to be covered mainly by alternative sources.
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For this project, BGG Consult was comissioned with the responsability of subsoil exploration. This included
first of all the planning and the execution of the following tasks:
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Survey of existing exploration data
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Enquiries of the ground water situation from the city authorities and the Verbund-AHP (operator of the
hydropower station)
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Percussion core drilling
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Dynamic probing
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Exploration pits
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Chemical analyses regarding contamination
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Soil-mechanics laboratory tests
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Pumping test
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Flowmeter test
Based on the obtained data, an expert’s report regarding the geotechnics and hydrogeology was compiled.
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Use of alternative energy sources:
From the onset of the project, the client set a high value on an excellent building ecology. This included
the use of alternative energy sources. BGG Consult scrutinized the feasability of several options (use of
ground water, geothermal energy, water from Danube river and possible combinations). The site is situated
within the effective area of the artificial ground water level control of the Freudenau Hydropower Station.
Therefore, an intensive dialogue with the city authorities and with the operator of the power station was
necessary from an early stage. For this purpose, numerical ground water model calculations were carried out.
Based on the results, documents were prepared for the application of the building permit and for permission
pertaining water and waterways.
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