Toothed-key spigot-and-socket structure for bridge precast concrete pier column and bridge foundation and construction method

Abstract

The invention discloses a toothed-key spigot-and-socket structure for a bridge precast concrete pier column and a bridge foundation and a construction method. The toothed-key spigot-and-socket structure comprises the precast pier column and the bridge foundation, wherein the pier column comprises a pier column exposed end and a pier column embedded end; the top surface of the bridge foundation isdownwardly provided with a reserved spigot-and-socket groove; the shape of the spigot-and-socket groove is matched with the shape of the pier column embedded end so that the pier column embedded end can be embedded into the spigot-and-socket groove; an annular pier column keyway is arranged along the outer wall of the pier column embedded end; a corresponding annular bridge foundation keyway is arranged along the inner wall of the spigot-and-socket groove; after the pier column embedded end is embedded in the spigot-and-socket groove, a groove bottom gap is left between the bottom surface of the pier column embedded end and the bottom surface of the spigot-and-socket groove and a groove gap is left between the outer wall of the pier column embedded end and the inner wall of the spigot-and-socket groove; and cast-in-place grouting materials enter into the groove gap from the top inlet and coagulate into an annular toothed key in the pier column keyway and the bridge foundation keyway. The toothed-key spigot-and-socket structure for the bridge precast concrete pier column and the bridge foundation and the construction method can solve the technical problems of an existing toothed-keyspigot-and-socket structure that the force distribution of a plurality of toothed keys is uneven, that the compactness of the grouting materials is difficult to guarantee, and that the grouting efficiency is low.

Description

technical field [0001] The invention belongs to the technical field of prefabricated bridges, in particular to a bridge prefabricated concrete pier column and bridge foundation tooth key socket structure and a construction method. Background technique [0002] At present, the connection between the prefabricated pier column of the bridge and the cap or the enlarged foundation mainly includes steel strand connection, grouting sleeve steel bar connection, grouting bellows connection, cast-in-place wet joint connection and socket connection and other forms. Among them, the steel strand connection is mostly used in the prefabrication of the pier column sections, and the prestressed pier column segments are connected in series; the grouting sleeve steel bar connection is to use the grouting sleeve to connect the pier column reinforcement, and the connecting sleeve is prefabricated inside the concrete pier column. The connection is formed by sleeve grouting; the grouting bellows c...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the defects and deficiencies of the above-mentioned technologies, the present invention provides a bridge prefabricated concrete pier and bridge foundation tooth key socket structure and construction method, which solves the problem of uneven force distribution and grouting of multiple tooth keys in the existing tooth key socket structure. The density of the material is difficult to guarantee, and the technical problems of low grouting efficiency

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