Method for reinforcing railway frame-shaped bridge and reinforced railway frame-shaped bridge

Abstract

The invention discloses a method for reinforcing a railway frame-shaped bridge and the reinforced railway frame-shaped bridge. The method includes the reinforcement of the middle portion of a span portion when cracks are found on the lower surface of the span portion of a top plate of a railway frame-shaped bridge: sticking a plurality of parallel carbon fiber fabric tape on the lower surface of the top plate of between load-bearing walls on both sides of the cracks for covering the cracks, wherein the carbon fiber fabric tape is perpendicular to the cracks, and the length of the carbon fiber fabric tape is at least 10 times of the width of the cracks; then the reinforcement of supporting seat areas on both side of the middle portion of the span portion: sticking steel plates on the lower surface of the supporting seat areas for each of the supporting seat areas and arranging at least one steel support after sticking the steel plates on the surfaces of the load-bearing walls in connection with the supporting seat areas, wherein one end of the steel support is fixed onto the steel plates at the lower end of the supporting seat areas, and the other end is fixed onto the steel plates on the surfaces of the load-bearing walls. According to the technical scheme of the method for reinforcing the railway frame-shaped bridge and the reinforced railway frame-shaped bridge, the railway frame-shaped bridge can be reinforced without removing railroad beds above the top plates, and the headroom under the middle portion of the span portion cannot be affected.

Description

technical field [0001] The invention relates to the field of bridge reinforcement, in particular to a method for reinforcing a railway frame bridge and a reinforced railway frame bridge. Background technique [0002] With the continuous increase of the railway mileage in our country, the railway frame bridge is widely used in the cross section where the highway passes under the railway. [0003] A schematic cross-sectional view of the structure of a railway frame bridge along the direction of the railway line is shown in figure 1 As shown, it includes: a bottom slab buried underground, a top slab parallel to the bottom slab, and multiple load-bearing walls arranged between the top slab and the bottom slab to support the top slab. Usually, the roof between two adjacent load-bearing walls is divided into a mid-span area in the middle and support areas located on both sides of the mid-span area; the support area is connected to the load-bearing wall. [0004] Railway frame br...

AI Technical Summary

Problems solved by technology

[0008] In summary, if the existing reinforcement methods are used to reinforce the railway frame bridge, there will be traffic problems affecting the railway on the bridge or the road passing under the bridge; therefore, it is necessary to provide a method for strengthening the railway frame bridge. A method of reinforcement without affecting the railways on the bridge, or the roads passing under the bridge

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