WORK METHOD AND DEVICE FOR REGENERATING FUNCTION OF UNDERGROUND WATER COLLECTING AND DRAINING PIPES

摘要

PROBLEM TO BE SOLVED: To improve a water collecting capacity by re-drilling water collecting and draining pipes with reduced water collecting and draining function with a drilling device having a simple operating mechanism. SOLUTION: Water collecting and draining pipes P having strainer holes drilled in a tube wall to collect and drain water to the outside of a ground is buried in the ground. When the water collecting and draining function is lost or retarded by the clogging of the strainer holes caused when the water collecting and draining pipes or conduits are used for long period, the drilling device (cylindrical tube 1) having at least one boring auger 6 or boring drill 29 for boring the strainer hole H in the tube wall is inserted into the water collecting and draining pipes P. The drilling device drills the other strainer holes H in the tube wall at specified positions by the reciprocating motion of the boring auger 6 and the boring drill 29 driven by a hydraulically or rotatingly driving mechanism.