FLUSHING DEVICE FOR PIT WALL

摘要

PROBLEM TO BE SOLVED: To provide a flushing device for a pit wall for flushing the pit wall such as a boring hole is flushed, particularly for removing foreign matter filled in a crack can be removed efficiently. SOLUTION: The flushing device 1 for the pit wall has a rod 2 inserted into a pit section H to be flushed. A flushing liquid is discharged to the pit section H from a water-conveyance hole 4 formed on the lower section of the rod 2. Packers 7 and 8 forming a flushing-liquid storage region R are installed around the rod 2. A plunger 9 is mounted at a place corresponding to the storage region R in the rod 2. Foreign matters or the like T detained in cracks C formed to the pit wall W are dragged out and flushed by sucking the flushing liquid stored in the storage region R by the plunger 9. COPYRIGHT: (C)2004,JPO