| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a penetration type pipe strain meter that further shortens the time required for burying in a shallow soil foundation layer etc. <P>SOLUTION: A penetration type pipe strain meter 1 includes: an inner pipe member 7 having a plurality of strain gauges 8 at the outer periphery; a pipe strain meter body 2 comprising an outer pipe member 9 covering the outside of the inner pipe member 7 and the strain gauges 8; a digging screw 3 at a tip part of the pipe strain meter body 2; and a rotary tool attachment part 5 provided to a rear end 7b of the pipe strain meter body 2. The penetration type pipe strain meter 1 is buried in a slope etc. to measure strain of the foundation as a precursory phenomenon of a landslide etc. A pressure reception part 4 having a circular vertical cross-section is provided integrally at an outer periphery of the rear end 7b of the pipe strain meter body 2, and the pressure reception part 4 is formed so that a cross-sectional area S of the vertical cross-section gradually increases backward along a center axis L1 of the pipe strain meter body 2, and a front end 4a of the pressure reception part 4 connects with an outer peripheral surface of the pipe strain meter body 2. <P>COPYRIGHT: (C)2012,JPO&INPIT |
