SAMPLING DEVICE FOR FILLER SAMPLE IN BORED HOLE

摘要

PROBLEM TO BE SOLVED: To provide a sampling device for a filler sample in a bored hole that has a simple structure, is easily mounted on an excavation head for pile insertion hole formation, and does not increase in excavation resistance.SOLUTION: A sampling device for a filler sample in a bored hole includes a cylindrical outer cylinder, an actuator installed in the outer cylinder, and a sampling block capable of moving up and down to and from inside a lower end of the outer cylinder. The sampling block has elastic seal materials for airtightly sealing gap between an inner peripheral surface of the outer cylinder and itself at outer peripheries of both upper and lower ends, and includes a sample housing part which is hollowed toward the center side at an axially intermediate part position. The sampling block is operative to slide between a position where the sample housing part is drawn by the actuator into the outer cylinder to the overall length to close the outer periphery of the sample housing part in an airtight state and a position where an upper end of the sample housing part moves to under the lower end of the outer cylinder so as to release the entire outer peripheral region of the sample housing part.