B+T Group administration building

Ernst-Diegel-Straße 4
Industriepark Ost II
36304 Alsfeld

Drills: 7
Depth: 700
Year: 2013

Borehole grouting with the quality material Fischer GeoSolid® 240HS

For the expansion of the administration building, the nationwide acting disposal company B+T chose a geothermal solution for the cooling of the building. For the optimum installation, Fischer GeoSolid® 240HS was used for the backfilling of the geothermal probes.

Geology, stratigraphy, characteristics

The underground in Alsfeld consists of a change of territory layers (clays, sands, partly solid sandstone, gravel, slits). Remarkable are the layers between 86m and 100m, there are sandstones colored grey-black by wood residues. 

Drilling method, piping, drilling equipment

Directional drilling (water), drill bit 152mm, casing 178mm

Details of the grouting process

It was grouted with the contractor method with a colloidal mixer (MAT) with injection pipe Geo Tool (Uni work). The sulphate, carbon dioxide and saltwater resistant grouting material Fischer GeoSolid® 240HS was used. The frost-thaw stability was very important. 

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