ANCHOR BOLT STRUCTURE OF A RAILROAD BRIDGE CONSTRUCTED BY AN EVAZOTE JOINT SYSTEM FOR SECURING SMOOTH WORK WITHOUT HANGING AN EXCAVATION CHAIN OF A BALLAST CLEANER

摘要

PURPOSE: An anchor bolt structure of a railroad bridge constructed by an evazote joint system is provided to prevent a head of an anchor bolt for fixing a cover plate and a buffer rubber pad from hanging by restricting the anchor bolt from protruding higher than the cover plate. CONSTITUTION: In an anchor bolt for fixing a buffer rubber pad and a cover plate on a sphere concrete, an anchor bolt structure of a railroad bridge constructed by an evazote joint system is composed of a flat head bolt(13) having a hexagonal piece groove(12) formed on a screw unit(11) having a screw of the constant length to rotate the screw; a bush(14) positioned at the lower side of the flat head bolt and fitted to the screw unit; a synthetic resin shock absorbing ring(15) formed at the lower side of the bush to absorb shock generated in passing a rail vehicle and disposed at the screw unit; a taper(16) arranged under the shock absorbing ring, installed in the screw unit, and formed with a plurality of chucks(16a) with constant gradient; and a nut(17) contacting with the inner diameter of the chuck of the taper to widen outward the chuck along the inclined inner diameter of the chuck when the flat head bolt rotates.