| 摘要 |
PROBLEM TO BE SOLVED: To improve the measuring accuracy and shorten the term of works in regard to the porous wall measuring device and measuring method for cast-in place piles. SOLUTION: A porous wall measuring device 1 comprising a frame 2 located around above ground portion of a pile bore, an ultrasonic measuring device 3 which is supported in a freely movable manner in X-Y directions by the frame 2 and generates and receives ultrasonic waves in two directions intersecting within a horizontal plane, a center position measuring device 4 for measuring the center position for pile bore of the ultrasonic wave measuring device, drive devices 5, 6 for respectively moving the ultrasonic measuring devices in two directions, and a controller 7 for moving the ultrasonic wave measuring device to the center position of the pile bore by controlling the drive of the drive equipment.
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