| 摘要 |
PROBLEM TO BE SOLVED: To protect the wall of a hole by installing a casing at the same time as a sampler excavating operation is performed. SOLUTION: A core tube 2 and a boring rod 4 are inserted into the casing 1, and the casing 1 and the boring rod 4 are integrally connected to each other with chuck bolts 11 at the head part of the casing. The core tube 2 is rotated/vibrated by a driving device 40 to excavate a soil. A soil sample is filled in the air tube 2, and the wall of the hole is protected by the casing. COPYRIGHT: (C)2007,JPO&INPIT
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