Prefabricated section type concrete bridge joint structure and butt joint method thereof

Abstract

The invention discloses a prefabricated section type concrete bridge joint structure which comprises a prefabricated beam section, steel shear keys and circular covers. Holes are formed in the end face of the prefabricated beam section, the steel shear keys are disposed in the holes, a gap is reserved between each steel shear key and the corresponding hole, each gap is filled with seal material, each circular cover sleeves the corresponding steel shear key, each circular cover is provided with a crack line along the radius direction, and a pouring hole for pouring the seal material is formed at the intersection of each crack line and the excircle of the corresponding circular cover. The prefabricated section type concrete bridge joint structure has the advantages that the high-strength stainless steel circular steel is used as the steel shear keys, the steel shear keys are adhered in the holes of prefabricated beam section, and the size of the steel shear keys can be reduced by the high strength of the steel shear key materials; the prefabricated section type concrete bridge joint structure is simple in construction, stable in quality, high in durability, and long in service life, safety performance of existing bridging structures is increased, and the problem that the existing prefabricated beam sections are often damaged during transportation, construction and application due to the fact that the shear keys are made of plain concrete is well solved.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to a prefabricated segmental concrete bridge joint structure and a butt joint method thereof. Background technique [0002] The significant structural difference between prefabricated segmental concrete bridges and conventional bridges is the joints between segments. Because the main girder is discontinuous in the joint area, the ordinary steel bars that can transmit part of the normal stress and shear stress are disconnected here, and only the shear keys and prestressed steel tendons set at the joints are used to connect each segment, and a single The length of the segments is short, and there are many joints in each span, so the joints between the segments are the weak links of the structure, and the mechanical behavior of the joints directly affects the overall performance of the bridge. Existing prefabricated segmental concrete bridges generally have a plurality of closely ma...

AI Technical Summary

Problems solved by technology

During the transportation, construction and use of prefabricated beams, damage occurs because the shear keys are often plain concrete

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