Upper structure of hollow board beam bridge and construction method thereof

Abstract

The invention discloses an upper structure of a hollow board beam bridge. Hinge joints are formed among a plurality of hollow boards constructing a hollow board beam; concrete is cast on the hinge joints and the cast-in-situ layer of a bridge floor; the two end parts of the hollow boards are solid bodies; transverse steel bars are arranged on the two side faces of the hollow boards; the hollow board solid bodies together with the hinge joints and the concrete on the cast-in-situ layer of the bridge floor construct end transverse beams; prestressed steel bars transversely penetrating through a prestressed pipeline are arranged in the end transverse beams; the end transverse beams are supported by two supports. The construction method comprises the following steps: prefabricating the hollow boards; mounting a temporary support and a permanent support; mounting the hollow boards; transversely inserting the prestressed steel bars into the prestressed pipeline; casting concrete on the hinge joints and the cast-in-situ layer of the bridge floor; removing the temporary support. By adopting the end transverse beams provided with the prestressed steel bars, the overall rigidity of the upper structure of the hollow board beam bridge is effectively enhanced, and the hollow boards are stressed in a balanced way; the single board stress phenomenon is reduced, the local stress of the hinge joints on at the beam ends is reduced, and damage is prevented; each support is stressed, so that the problem of disengagement of the supports is solved; construction becomes simple and convenient, and the support maintenance workload and maintenance cost are low.

Description

Technical field [0001] The invention relates to a highway bridge, in particular to a superstructure of an assembled simply supported hollow slab beam bridge and a construction method thereof. Background technique [0002] Hollow slab girder bridges are one of the most commonly used structural forms for small span bridges of 10-20m. Most of them are simply supported beams, which are suitable for factory mass production and prefabricated construction. Its section is composed of multiple hollow slabs, and the slabs are arranged After the hinged joints and hollow-core slabs are erected, the hinged joints and the cast-in-situ concrete layer of the bridge deck are poured together, and multiple hollow slabs, hinge joints and the cast-in-situ bridge deck form a whole to bear the load of automobiles and other loads. [0003] However, the existing hollow slab girder bridges often suffer from the failure of the bearings. The main reasons are: 1. A single hollow slab is supported by 4 rubber b...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a hollow slab girder bridge superstructure to effectively solve the technical problem of existing multi-support hollow slab girder bridges that the hinge joints are damaged due to the support being empty, and then the bridge is damaged by the force of the single slab; at the same time The method of construction that provides such a structure

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