MANHOLE HEIGHT ADJUSTMENT DEVICE AND MANHOLE REPAIR CONSTRUCTION METHOD UTILIZING MANHOLE HEIGHT ADJUSTMENT METHOD

摘要

A manhole height adjustment device and a manhole repair method using a manhole height adjustment method are provided to improve stability and durability of the manhole, and more conveniently lift a manhole lid. A manhole height adjustment device is applied to a manhole comprising a manhole lid support(20) and a manhole lid(22). The manhole lid support is mounted to an upper side of a manhole slab(10) laid underground. The manhole lid is placed on a central entrance of the manhole lie support. The manhole height adjustment device comprises a nut bracket(40) and an adjustment bolt(50). The nut bracket includes a sidewall(42), contacted with an outer end of a lower flange(21), a horizontal supporting piece(44) extended outward from one side of the sidewall, and a screw hole(46) formed on the horizontal support piece. The adjustment bolt is screw-connected with the screw hole of the nut bracket, by penetrating a fixing hole(21a) formed on the lower flange. A manhole repair method using a manhole height adjustment method comprises a road excavation step, a nut bracket installation step, and an adjustment bolt operation step.