Delivery of a mobile drilling and probing device with accessories incl. proof of proof of functionality and instruction of the client's service personnel

The Federal Institute for Geosciences and Natural Resources (BGR) requires a mobile drilling and sounding device for the B2.5 Research and Development Centre for Mining Impacts (FEZB) at the Cottbus site for sinking geotechnical exploratory boreholes using various drilling methods, for obtaining undisturbed/disturbed and depth-oriented soil samples in cohesive and non-cohesive soils (loose rock). For the extraction of depth-oriented/undisturbed groundwater samples, digestion of groundwater conditions (horizons), insito measurements of aquifers by means of boreholes/non-invasive methods and the establishment of groundwater measuring points (GWM). Furthermore, geophysical measurements are to be carried out in the borehole (piped and unpiped) and various measuring instruments for continuous observation purposes (hydrogeological and hydrochemical measurements) are to be introduced.

The sinking of the boreholes should be carried out by means of dry drilling methods (rotating, hitting, ramming), piped and uncasting. Pushing drilling methods (direct push) and probing (pile driving probing, pile core probing, SPT, etc.), as well as heavy (DPH) and superheavy (DPSH) pile probing are also required.

The expected final depths are -20.00 m above sea level, depending on the soil conditions and the drilling method/drilling tool used.

Borehole diameters of up to max. 219 mm (piped/unpiped) are required and a recoverable sample diameter of up to max. 80 mm is sought by line removal or open sampling device. For non-invasive or less invasive procedures (Direct Push), the diameter should be up to Ø 40 mm.