In-situ testing device, groundwater level measurement method and soil sample collection method

摘要

PROBLEM TO BE SOLVED: To provide an original position testing device of a simple structure capable of accurately measuring an underground water level and sampling soil at a desired position for certain.SOLUTION: An original position testing device 4 is for measuring an underground water level W and sampling soil, and includes: an inner tube 1 having water passage holes 11, ... pierced in a circumferential direction and an axial direction leaving an interval; an intermediate tube 2 disposed on an outer peripheral side of the inner tube and provided with a plurality of side surface openings 21, ... at a position that may be overlapped with the water passage hole; and a cover part 22 and a tip head part 12 provided at a tip of the inner tube and the intermediate tube for freely opening/closing a tip port 24.SELECTED DRAWING: Figure 1