A drainage stock for roadway subject to dynamic pressure

The utility model relates to a drainage stock for roadway subject to dynamic pressure, comprises a pole body, the body of rod comprises with the drilling rod spiral shell rasp bar, the pole that permeates water, the spiral shell rasp bar and the pole fixed connection that permeates water, the pole that permeates water passes through connecting piece swing joint with the drilling rod, spiral shellrasp bar left end is equipped with the mounting, spiral shell rasp bar outside cover is equipped with the backup pad, the backup pad left side is equipped with the telescopic link, the telescopic linkother end is equipped with the bearing plate, the bearing plate also the suit in the spiral shell rasp bar outside, just the telescopic link both ends are passed through moving part difference jointsupport board and are connected with the bearing plate, the bearing plate left side is equipped with the nut, just the nut matches with spiral shell rasp bar, it is equipped with the hole of permeating water on the pole to perm