Device for preventing floating of duct piece structure and using method

The invention belongs to the technical field of tunnel supporting equipment, and particularly relates to a device for preventing a duct piece structure from floating and a using method.The device comprises a duct piece, a plurality of embedded sleeves are arranged on the peripheral side of the duct piece in a penetrating mode and fixedly connected with the inner wall of the duct piece, and supporting rods are arranged in the embedded sleeves in a sleeved mode; by arranging the threaded hole, the waterproof plug is matched with the external thread pushing rod, when the supporting rod is in threaded connection with the waterproof plug in the embedded sleeve, the limiting effect can be achieved, the supporting rod is prevented from being separated from the duct piece, and when the threaded connection relation between the waterproof plug and the threaded hole is released and the external thread pushing rod is in threaded connection with the inner wall of the embedded sleeve, the supporting rod is prevented from b