Engineering geological survey in Trutnov – state border, detailed geological survey

There were realized explorary core holes by wheeled and crawler drilling rigs (VHS 382) in poorly accessible sites as a forest, sloping terrain etc.  These boreholes were drilled by tungsten-carbide bits with  220/175/156/137 mm diameters.  Into the rocky bedrock drill holes were drilled by wire-line technology with water flush and with 109/76 mm diameter. Overall were drilled 123 boreholes with total length 359 m on this locality – in detail:

5 hydraulic drill holes with total length 102 m
9 monitoring boreholes with total length 97 m
109 engineering-geological drill holes with total drilling length 160 m
the deepest borehole on locality has been drilled up to depth 56 m