Watertight access door structure of steel box arch bridge

Abstract

The invention relates to the field of bridge structures, in particular to a watertight access door structure of a steel box arch bridge, which can ensure the sealing performance while ensuring the convenience of opening and closing, and the structure comprises an access hole arranged at the bottom of a steel box girder, a manhole stiffening ring fixedly arranged along the access hole and a manhole cover plate in closed fit with the manhole stiffening ring, the manhole cover plate is rotationally connected with a cover plate connecting piece fixedly arranged on the steel box girder, the manhole cover plate is in closed fit with the manhole stiffening ring through a cover plate sealing mechanism arranged on the steel box girder, and a sealing ring structure matched with the edge of the manhole stiffening ring is arranged on the surface of the side, facing the manhole stiffening ring, of the manhole cover plate. The sealing ring structure is tightly attached to the edge of the manhole stiffening ring in a sealed mode. According to the invention, the sealing ring structure matched with the edge of the manhole stiffening ring is arranged on the surface of the side, facing the manhole stiffening ring, of the manhole cover plate, and therefore the sealing performance requirement is met. The watertight access door structure is particularly suitable for a steel box bridge structure of a bridge.

Description

technical field [0001] The invention relates to the field of bridge structures, in particular to a watertight inspection door structure for a steel box arch bridge. Background technique [0002] In the steel box bridge structure, in order to facilitate the on-site installation personnel to carry out the final operation inside the box body and to maintain and repair the steel box bridge in the later stage, a watertight door is usually set at the web plate of the steel box bridge. At present, the inspection hole of the steel box girder is opened at the bottom plate of the steel box girder. Because the inspection door is relatively bulky and under the action of gravity, it is not easy to open, and the structural airtight performance is poor, and there will be a big safety hazard after a long time. Taking the patented technology CN201920610114.6 as an example, it announced a door-type inspection hole dedicated to steel box bridges. Cause the internal corrosion of the steel box ...

AI Technical Summary

Problems solved by technology

At present, the inspection hole of the steel box girder is opened at the bottom plate of the steel box girder. Due to the heavy weight of the inspection door and the action of gravity, it is not easy to open, and the structural airtight performance is poor. After a long time, there will be a big safety hazard.

Taking the patented technology CN201920610114.6 as an example, it discloses a door-type inspection hole dedicated to steel box bridges. Causes internal corrosion of steel box girders, which adversely affects related structures

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