Adjacent to the existing Factory 2, an assembly warehouse was to be built on the premises
of the company Blum in Höchst (Austrian state of Vorarlberg). The complex also included
additional office and administrative space. The building features a length of 113 m, a
width of 20 m and a height of
22 m. The integration below terrain is 4 m at maximum.
Due to the planned storage of metallic materials, very high loads occur which have to be
transferred into the underground without damage.
BGG has been comissioned with the supervision in the fields of geotechnics and hydrogeology
during all planning and realization phases of the project. After the evaluation of
explorations of previous construction stages and neighbouring structures, the subsoil
investigation could remain limited to dynamic probings.
In addition to the foundation of the new building, BGG had to deal with the securing of
existing structures and traffic routes as well as the dewa-
tering of the construction pit.
Subsequently to the geotechnical and hydrogeo-
logical evaluation prior to the submission for
construction permit, a geotechnical supervision of the specialized foundation works was
carried out during construction.
Foundation of the Warehouse:
Based on the subsoil explo-
rations, a vivid alternation of gravel and sand with lenticularly
bers of silt and sand-silt mixtures were to be expec-
ted below a soft, cohesive
cover layer with a thickness of up to 3,0 m.
A significant finding from the investigation was a great variation of the density between
very loose and loose to medium dense. As most economical foundation variant, a shallow
tion after a soil improvement by means of vibro-displace-
ment technique was recommended
and also implemented. With this special method, the load application zone could be
homogenized and an in-
crease of density (and with it also an improvement of the bearing and
deformation characteristics) obtained. The construction of a stable and fit-for-use building
was thus ensured.