Large-span railway steel bridge end telescopic device

Abstract

The invention relates to a large-span railway steel bridge end telescopic device which comprises a guide sliding groove, a middle transition plate and side transition plates. The guide sliding grooveis matched and mounted at the upper part of a ballast bed of a railway steel bridge; the middle transition plate is fixedly installed on the upper part of the guide sliding groove in a matched mode. The side transition plates are arranged on the two opposite sides in the width direction in a matched mode. Movable steel sleepers, fixed steel sleepers and concrete turnout sleepers are arranged at the upper parts of the ballast beds on the outer sides of the two ends of the middle transition plate and the side transition plates in the length direction; the movable steel sleepers, the fixed steelsleepers and the concrete turnout sleepers are arranged in the width direction of the middle transition plate and the side transition plates. The two ends of the movable steel sleepers and the fixed steel sleepers in the length direction are matched and connected with the side transition plates through connecting rod telescopic mechanisms; steel rails of the railway steel bridge are fixedly mounted at the upper parts of the side transition plates, the movable steel sleepers, the fixed steel sleepers and the concrete turnout sleepers. The large-span railway steel bridge end telescopic device issimple and reasonable in structural design, convenient to install and lay, convenient to maintain subsequently and suitable for super-large telescopic displacement.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a telescoping device at the end of a long-span railway steel bridge. Background technique [0002] With the continuous development of bridge technology in our country, there are more and more long-span steel bridges using continuous beams of long-span steel structures. In order to adapt to the telescopic displacement of continuous beams of long-span steel structures, it is necessary to install telescopic devices at the end-beam joints of long-span railway steel bridges, in order to ensure the safe continuous and effective support of the track when the beam joints expand and contract. [0003] The beam end telescopic device should adapt to all mutual deformations of the bridge and track structures, such as horizontal and longitudinal beam end angles, longitudinal and transverse beam end displacements, etc.; at the same time, it should have good strength and be able to ...

AI Technical Summary

Problems solved by technology

[0006] There is no domestic design and application case for the ballastless ballast bed with a large expansion and contraction of >1200mm and a beam end rotation angle greater than 2‰ for the continuous beam of a long-span steel bridge

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