A kind of FRP prestressed tendon ballastless track slab and preparation method thereof

Abstract

The invention discloses an FRP prestressed reinforcement ballastless track. The FRP prestressed reinforcement ballastless track comprises a plate body extending in the lengthwise direction, a plurality of layers of stress reinforcement meshes are arranged in the thickness direction of the plate body, are horizontally arranged in the plate body, and comprise a plurality of steel-continuous filament composite reinforcements extending in the transverse direction of the plate body and a plurality of high-strength steel bars extending in the lengthwise direction of the plate body, and the steel-continuous filament composite reinforcements and the high-strength steel bars are arranged in an orthogonal manner; and the plate body is further internally provided with a plurality of FRP prestressed reinforcements arranged in the lengthwise direction and the transverse direction, and the FRP prestressed reinforcements are located between the two layers of adjacent stress reinforcement meshes. The invention further discloses a manufacturing method of the FRP prestressed reinforcement ballastless track; the steel-continuous filament composite reinforcements and the traditional high-strength steel bars form the stress reinforcement meshes, and the insulating property of a track plate is improved; the FRP prestressed reinforcements are adopted for increasing cracking loads, and the fatigue durability and the endurance quality of the track plate are improved; and by means of the method, other insulating measures are not needed, and the production cost can be effectively reduced.

Description

technical field [0001] The invention relates to railway track technology, in particular to a ballastless track slab with FRP prestressed tendons and a preparation method thereof. Background technique [0002] As an advanced track technology in the world today, ballastless track is widely used in high-speed railways all over the world due to its high ride comfort, high stability and high durability. [0003] In order to make the smoothness, stability and durability of the ballastless track meet the requirements, various methods are currently used to improve the insulation and durability of the ballastless track slab. In terms of improving the insulation performance, there are two methods currently used. The first method is the coating method, which is to apply an insulating coating on the steel mesh to achieve the purpose of insulation. The insulation coating is damaged, which reduces the insulation effect; the second method is the thermoplastic sleeve or plastic clip method...

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Problems solved by technology

In terms of improving the insulation performance, there are two methods currently used. The first method is the coating method. The insulating coating is applied to the steel mesh to achieve the purpose of insulation. However, this method is easy to use during the production of the track slab. The insulation coating is damaged, which reduces the insulation effect; the second method is the thermoplastic sleeve or plastic clip method, although this method can achieve a relatively ideal insulation effect, but the cost is high, the construction is troublesome, and the insulation points of the steel mesh are relatively small. more, it will reduce the bonding force between steel and concrete; in terms of improving durability, more prestressed tendons are used to increase the cracking load and high-strength concrete is used to improve impermeability, while the prestressed tendons of the prior art are used in harsh conditions. The fatigue resistance and corrosion resistance in the environment are poor. Under high-stress working conditions, the durability and reliability of the prestressed tendons cannot be guaranteed due to corrosion. In addition, although the high-strength concrete used in the track slab has high strength, it is Insufficient toughness, tends to crack when subjected to impact loads, further reducing the durability of the track slab

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