MIXING AND AGITATING DEVICE FOR IMPROVING GROUND AND MIXING AND AGITATING METHOD FOR IMPROVING GROUND

摘要

[Problem] To enable a sensor for monitoring the rotating state of a co-rotation preventing blade to perform the monitoring without being located in the ground to thereby improve the reliability and durability of the sensor. [Solution] As a mixing and agitating device for improving the ground, a vibration generator (41) which generates vibration by colliding with a co-rotation preventing blade (21) the rotation of which is restricted in an excavation process by the rotation of a rotating rod (101) is provided to an agitating blade (31) via a spring member (43). When excavated soil which has been excavated and a solidifying material are mixed and agitated using the mixing and agitating device, the vibration generated when the vibration generator (41) collides with the co-rotation preventing blade (21) is detected by a sensor (51), and the rotation-stopped state or the rotating state of the co-rotation preventing blade (21) is detected from data relating to the detection. The sensor (51) only needs to be attached to a casing of a motor (105) at the upper end of the rotating rod (101) located on the ground surface, and therefore the sensor is not damaged unlike conventional sensors which are disposed in the ground (900).