| 摘要 |
PROBLEM TO BE SOLVED: To enable a boring core keeping actual properties in the natural state of subsoil and rock to be surely sampled.SOLUTION: A boring core sampling device equipped with a core rotation prevention mechanism includes: a core tube 2 cylindrically formed, mounted with an outer head 7 at its upper end, and provided with boring means 5 at the bottom edge of its cylindrical peripheral wall; a sample protective pipe 1 cylindrically formed, mounted with an inner head 6 at its upper end, and disposed coaxially with the core tube 2 inside the core tube 2; and a shaft 10 penetrating through the outer head 7 of the core tube 2 and the inner head 6 of the sample protective pipe 1. The core tube 2 is axially rotatable with respect to the shaft 10 because the outer head 7 of the core tube 2 is rotatable in a peripheral direction with respect to the shaft, and the inner head 6 of the sample protective pipe 1 is not rotatable in a peripheral direction with respect to the shaft 10 by fitting the cross sectional shape perpendicular to the axis of the shaft 10 to the shape of the through-hole of the inner head 6 of the sample protective pipe 1, thus making the sample protective pipe 1 not axially rotatable with respect to the shaft 10. |
