DOUBLE TUBE TYPE GEO-MATERIAL SAMPLING DEVICE IN SOFT GROUND, AND GEO-MATERIAL SAMPLING DEVICE SET

摘要

PROBLEM TO BE SOLVED: To provide a double tube type geo-material sampling device in a soft ground, which is capable of sampling the soft ground to a depth of several meters while preventing collapse of a porous wall and without requiring a special motive force, and a geo-material sampling set.;SOLUTION: A sampling device 10 for sampling a soft geo-material comprises: a cylindrical sampling tube 20 in which a piston 30 is provided and of which a distal end side is opened; and a cylindrical outer tube 40 in which the sampling tube 20 is accommodated. The sampling tube 20 enters the ground from the distal end side through an installation rod 50 in a state where the piston 30 is moved closer to the distal end of the sampling tube 20. During an operation, a position of a disc body 31 or a shaft part 32 of the piston 30 is not changed. Between the double tubes, the outer tube 40 enters the ground while accommodating the sampling tube 20 which has entered the ground, into the outer tube 40. Thus, a porous wall can be surely protected and samples collapsing and entering the sampling tube from locations of different depth can be prevented from being mixed. Even when the sampling tube is inserted to the ground iteratively, a geo-material representative of the depth can be sampled.;COPYRIGHT: (C)2014,JPO&INPIT