Unit beam type multidirectional displacement telescopic device

Abstract

The invention discloses a unit beam type multidirectional displacement telescopic device. The device comprises unit beams, a damping displacement support, an inverted buckle chain plate, a concrete end supporting bracket, an inhaul cable device, a limiting device and a water stopping device, wherein the unit beams are fixed to the supporting brackets on the two sides of the beam end respectively and supported by the damping displacement supports, and the limiting devices and the inhaul cable devices are arranged between the movable unit beams to control transverse deformation; the unit beams are mutually staggered, mutually guided and mutually slide and stretch, so the joint-crossing stretching function of the stretching device is realized; the reverse buckling chain plates are connected to the ends of the telescopic unit beams and arranged between the fixed unit beams, the bottoms of the reverse buckling chain plates are buckled with the fixed unit beams, the unit beams and the reverse buckling chain plates form a beam-crossing seam structure plane flush with the road surface, and therefore smooth passing of vehicles is guaranteed. The device is advantaged in that driving comfortis improved, the structural size of a bridge expansion joint mounting groove is reduced, shock absorption and noise reduction are achieved, the requirements for multi-directional displacement of a beam body and large-span bridge structure displacement are met, and mounting, replacement and maintenance are facilitated due to the unitized design.

Description

technical field [0001] The invention belongs to the technical field of bridge expansion and contraction, and in particular relates to a unit beam type multidirectional displacement expansion device. Background technique [0002] Expansion devices are required on the bridge to meet the expansion and contraction requirements of the bridge. The telescopic device is a key part of the bridge components and plays an important role in realizing the bridge function. Common bridge expansion devices include plate rubber expansion devices, steel modular expansion devices, and comb-tooth plate expansion devices. During the construction and operation of the bridge, it will be subjected to vehicle loads, shrinkage and creep of the bridge's own materials, foundation settlement, wind load, etc., causing deformation of the bridge beam end. [0003] The section steel modular expansion devices currently on the market have large longitudinal expansion gaps, uneven expansion, concentrated impa...

AI Technical Summary

Problems solved by technology

[0003] The section steel modular expansion devices currently on the market have large longitudinal expansion gaps, uneven expansion, concentrated impact force, severe vehicle jumping, fragile concrete, high damage rate of expansion parts, high manufacturing costs, and reserved slots for design. Phenomena such as depth are more prominent

Especially for suspension bridges, cable-stayed bridges, and oblique and curved bridges, due to the inevitable multi-directional displacement of the bridge structure, the defects that do not meet the requirements of lateral and multi-directional displacement have been seriously exposed during the use process

However, for cable-stayed bridges and suspension bridges with high requirements for vertical deformation and large longitudinal and lateral displacements, it is difficult for bridge modulus telescopic devices to meet the requirements for multi-directional displacements.

As for the expansion joint of the comb plate, the building height of the steel plate should be low, the bending resistance is poor, and the uneven installation can easily cause vibration, looseness, and plate breakage, and the comb plate of the displacement structure has two points of support after displacement and the end of the plate is tilted. Circumstances affecting driving safety

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