Aerial rail traffic bridge spherical steel support

Abstract

The invention provides an aerial rail traffic bridge spherical steel support, displacement in the longitudinal direction, the transverse direction and the vertical direction of a beam body can be adjusted in the beam pier and beam connecting construction process, pier and beam connecting construction accuracy is reduced, the construction difficulty is reduced, so that construction is convenient, and construction efficiency is improved. The aerial rail traffic bridge spherical steel support is arranged between a beam body and a pier body and comprises an upper support plate, a lower support plate and a spherical crown liner plate located between the upper support plate and the lower support plate. A pivoting friction pair is formed by the lower structure bottom face of the upper support plate and the upper spherical surface of the spherical crown liner plate, and a sliding friction pair is formed by the bottom face of the spherical crown liner plate and the top face of the lower supportplate. Longitudinal adjusting holes are longitudinally formed in the two transverse sides of the upper support plate at intervals, and each longitudinal adjusting hole is provided with an upper connecting bolt connecting the upper support plate with the beam body. Transverse adjusting holes are transversely formed in the two longitudinal sides of the lower support plate at intervals, and each transverse adjusting hole is provided with a lower connecting bolt connecting the lower support plate with the pier body. The bottom face of the lower support plate and / or the top face of the upper support plate are / is provided with height adjusting liner plates / a height adjusting liner plate.

Description

technical field [0001] The invention relates to rail traffic, in particular to a spherical steel bearing for an aerial rail traffic bridge, which is used for the connection between a bridge pier body and a beam body. Background technique [0002] As the key component of the bridge linking the up and down, the support can reliably transmit the reaction force of the bridge superstructure to the bridge substructure. At present, most of the newly-built rail transit bridges in my country use bearings as pier-beam connectors. [0003] The spherical steel bearing has the advantages of large bearing capacity, small rotational moment and large rotation angle, and has become the first bearing of our new rail transit bridge. [0004] Air rail transit bridges generally adopt an all-steel structure model and its unique train operation mode, which requires very high precision requirements for line construction. In the case of prefabricated piers and beams, installation errors during asse...

AI Technical Summary

Problems solved by technology

[0004] Air rail transit bridges generally adopt an all-steel structure model and its unique train operation mode, which requires very high precision requirements for line construction. In the case of prefabricated piers and beams, installation errors during assembly are now inevitable. Especially between beams with two adjacent holes, on the premise of ensuring the expansion joints, the beam body often needs to be adjusted vertically and horizontally; since the air rail transit does not have conventional tracks, the requirements for the line height difference are more stringent, and the foundation settlement The dislocation and mutation of adjacent two-hole beams caused by assembly errors are not allowed

The existing spherical steel bearings have no adjustment function in the vertical and horizontal directions, and the construction accuracy of the air rail transit bridge is very high, the construction is very difficult, and it is even impossible to install

[0005] Since the air rail transit does not have a track in the traditional sense, in order to ensure the smooth and comfortable operation of the line, special expansion joints are often used, and the range of expansion joints is required to be within a certain control value. Therefore, it is necessary to add a limit function to the support to avoid Under accidental loads such as train brakes, strong winds and earthquakes, the expansion joint change value exceeds the limit, and the current sliding spherical steel bearing does not have a limit function in the main sliding direction

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