SF steel comb-teeth-shaped telescopic device and installing construction method thereof

Abstract

The invention discloses an SF steel comb-teeth-shaped telescopic device and an installing construction method thereof. The SF steel comb-teeth-shaped telescopic device includes a comb-teeth-shaped steel plate, a comb teeth plate anti-abrasion layer, a figured steel seal, a rubber sealing tape, a high strength bolt and a post-cast strip concrete layer. The installing construction method includes the steps of preparatory work before installing, line drawing and cutting, groove opening digging and cleaning, expansion joint fixing fixed bolt set positioning, centering and leveling, temporary fixing, detecting, welding and fixing, cleaning, concrete pouring below the comb teeth plate, comb teeth plate installing, surface finishing and maintenance and nut fixing and epoxy resin infusing. The SFsteel comb-teeth-shaped telescopic device and the installing construction method thereof have the beneficial effects that the disadvantages that fashioned iron type expansion joint concrete damaging and fashioned iron deformation can be solved, the maintenance charge is reduced, the disadvantage that garbage and sundries enter the expansion joint to affect expansion of a bridge before is improved,and the problem of running safety of the bridge is solved.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering expansion joint construction, and specifically relates to an SF steel comb-tooth type expansion device and an installation and construction method thereof. Background technique [0002] At present, bridge expansion joints refer to setting expansion joints between two girder ends, between girder ends and abutments, or at the hinged position of the bridge in order to meet the deformation requirements of the bridge deck. It can be freely expanded and contracted in all directions, firm and reliable, and the vehicle runs smoothly without sudden jumps and noises; it must be able to prevent rainwater and garbage from infiltrating and blocking; installation, inspection, maintenance, and removal of dirt should be simple and convenient. [0003] The patent application with the publication number CN107130515A discloses a large-span impact-resistant multi-directional displacement comb-shaped plate ...

AI Technical Summary

Problems solved by technology

[0006] (1) The improvement of the design and application of new technology of the steel bridge expansion device is slow, and some impact phenomena will occur when driving at the bridge expansion joint, causing discomfort to passengers and generating noise, which affects the surrounding environment; steel bridge expansion Device sundries are easily stuffed into the seam, which is not easy to clean

[0007] (2) After the bridge has been in operation for a period of time, the steel expansion joints are prone to rivet loosening, the concrete in the anchorage area is broken, and the expansion joint welds are broken, which is easy to cause the deformation of the steel expansion joints, which will increase the amount and difficulty of subsequent maintenance and repair.

[0008] (3) The expansion joints are easy to be blocked, and the continuous accumulation of sand, stones, and debris at the expansion joints reduces or even eliminates the free expansion and contraction performance of the expansion joints. When the ambient temperature of the bridge rises, the main girder of the bridge cannot Displacement and expansion will occur. If the thrust between the beams is serious, it may also lead to the jacking up of the main beam or the cracking of the abutment back wall; the deformation of the steel expansion joints will affect the safety performance of the bridge.

[0009] (4) Since the rubber strips of steel expansion joints are exposed all the year round, they are easy to age and cause damage to the rubber strips

Images