Rathaus-Galerie Hagen

58095 Hagen

Drills: 94
Depth: 18600
Year: 2012

Borehole grouting with the quality material Fischer GeoSolid® 235

In the center of Hagen there were several existing buildings demolished to build the new shopping mall “Rathaus Galerie”. The shopping center with 24000m² rental space and about 75 shops will be opened in autumn 2014. With the geothermal installation 80% of the heating and cooling load of the shopping center will be covered. The certification “Gold Siegel” of the german association “Nachhaltiges Bauen” will be awarded. For the optimum backfilling of the geothermal probes , the thermally enhanced grouting material Fischer GeoSolid® 235 was used.

Geology, stratigraphy, characteristics

There are layers of upper carboniferous clays (Oberkarbonische Tonsteine), siltstones (Schluffsteine) and sandstones of the silesium-series found. 

Drilling method, piping, drilling equipment

Drilling procedure with ongoing cuttings. 152mm drill bit, 178mm casing

Details of the grouting process

For operational reasons, the grouting material Fischer GeoSolid® 235 was delivered in silos. The material was mixed directly with a PFT G4 mixer and grouted with the contractor method. The grouting procedure was completed without any problems. 

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