WATERTIGHT CAISSON FOR REPAIRING PIER BRIDGE

摘要

PURPOSE: The watertight caisson for repairing a pier bridge is provided to repair quickly and easily with low expenses when repairing the damage occurred at the lowest end of a well tank having most of piers of a bridge soaked in water. CONSTITUTION: The production method of a watertight caisson(10) has the steps of: forming the curved part(13) having the lower end of a body(10a) curved outward; forming an injection hole(14) for injecting air or water with a tube(15) to the upper part of outside of the curved part(13); forming a balance keeping piece(17) for preventing the effect of water pressure to the tube(15) as maintaining the horizon when establishing at the lower end of the left side of the curved part(13) and the lower end of the inner side of the body(10a); forming each bolt(19) combined at the lower end of the inner side of the body(10a) and the lower end of the outside of the curved part(13) as penetrating a bolt(19) into a guide hole(18).