Shaft blowing device and shaft blowing construction method

摘要

PURPOSE:To spray concrete, etc., to wall surfaces mechanically with remote control by suspending a frame body in a vertical shaft to position it with grippers, and turning and driving a nozzle on the frame body. CONSTITUTION:Four grippers 16 positioning a frame body 13 in a vertical shaft are provided to the side of the frame body 13 opposed to a side wall Wa in an expansible manner in the horizontal direction. When spraying operation of concrete, etc., is made, a hydraulic unit 35 is operated from a remote control section to espand and drive all grippers 16, and the whole contact member 34 is brought into contact with the existing earth retaining layer Wb to position a rotary shaft 25 at the approximate center of the vertical shaft W as the pushing reaction. After that, a supply device is started, and a nozzle driving section 44 is driven to rotate the rotary shaft in a required direction. According to the constitution, concrete, etc., from a nozzle 27 are made to adhere to the opposite side wall Wa, and the uniform earth retaining layer Wb is formed in succession in every direction. After specific thickness is decided by a TV camera 32, every operation is stopped to degenerate and drive the grippers 16, and a spraying manipulator 11 is lowered by specific distance.