| 摘要 |
PROBLEM TO BE SOLVED: To provide a condition measuring instrument for concrete that can make continuous measurement without interrupt so that the condition of concrete may be measured quickly as a whole and, in addition, can make measurement even in a sharply curved tunnel. SOLUTION: This condition measuring instrument comprises a condition measuring apparatus 1, containing a hammering sound generating means which generates hammering sound by striking the surface of lining concrete C, a hammering sound collecting means which collects the generated hammering sound, and a condition measuring means which measures the condition of the concrete C based on collected hammering sounds in a state where at least the hammering sound generating and collecting means are united in one body, a robot arm (measuring apparatus supporting means) 2 which supports the measuring apparatus 1 in a state where the apparatus 1 is brought or not brought into contact with the surface of the concrete C by applying a force having a prescribed magnitude, direction, point of application to the apparatus 1 and a traveling dolly 3 containing an upper car body 31 on which the robot arm 2 is mounted and a truck (lower traveling dolly) 32. The traveling dolly 3 is provided with a pair of left and right trailing wheels 31a which suppress the inclination of the upper car body 31 caused when the robot arm 2 is operated within a fixed range.
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