For irrigating outdoor facilities and cooling thermal wastewater, the Obermain Therme in Bad Staffelstein requires two additional service water wells in addition to the existing service water wells that open up the Quaternary.

In essence, the contractor (AN) ff. has to provide construction services:

· Evidence of used areas and access

· Adapt the drill rig spaces to your own needs

· Performing two holes with end drilling diameter DN 600 mm and depth of 8.50 m and 9.60 m.

· Execution of clear pumps in the piped borehole or flush exchange

· Expansion of bores into PVC service water wells according to the expansion plan according to DVGW regulations with hard PVC, wall thickness to meet static conditions and

Adjusted installation depths, connections must be secured with shrink sleeves

· annular space silification by means of filler tubes and settling pistons according to BÜ specifications

· intensive dispatching

· Use clay pellets as a counter filter in the annulum

· Setting a barrier up to 6.0 m and GOK using a cement-bentonite suspension

· Performing a pumping test with a duration of approx. 72 h to determine quantitative and qualitative parameters as a basis for later

Continuing

· Setting a buoyance-protected concrete shaft approx. 2x2x2.50 m

· TV viewing of the wells for acceptance in accordance with VOB/B

· Documentation (expansion plan, shift list, pumping tests) taking into account BÜ records