Transverse prestress reinforcement method of railway simply-supported T beam

Abstract

The invention discloses a transverse prestress reinforcement method of a railway simply-supported T beam. The transverse prestress reinforcement method comprises the following steps: S1, the steel barposition of a main beam web of the railway simply-supported T beam is detected; S2, hole position drilling of a transverse prestress steel beam is conducted; S3, common steel bars are anchored; S4, the steel bars are pre-tightened; S5, the transverse prestress steel beam is mounted; S6, a formwork is mounted; S7, the transverse prestress steel beam is primarily pulled; S8, the transverse prestress steel beam is finally pulled, specifically, the transverse prestress steel beam is pulled after the concrete strength reaches 75-85%, pulling is conducted in two steps, and pulling force each time is 190-200 kN; and S9, anchor sealing is conducted, specifically, anchor sealing is conducted through C50 reinforced concrete. According to the transverse prestress reinforcement method, through a finite element analysis method of the transverse reinforcement effect of the railway simply-supported T beam, the self-vibration frequency after reinforcement can be accurately estimated, and increasing of the bridge transverse stiffness is promoted through the transverse prestress reinforcement method.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a transverse prestressed reinforcement method for simply supported T-beams of railways. Background technique [0002] With the vigorous development of my country's railways, the load and running speed of trains continue to increase. The annual cargo delivery volume of my country's railways ranks first in the world, reaching 3 billion tons. The powerful railway transportation has made great contributions to my country's logistics, economy and strategic deployment. great contribution. At present, the heavier ones in commonly used freight trains are C70, C80 and C100, freight cars; the maximum operating speed of passenger trains (high-speed trains) is as high as 200km / h. All of these have put forward higher and higher requirements for my country's railway subgrades, bridges and tunnels. my country has heavy-duty freight lines with large mileage, such as Daqin Line, Sh...

AI Technical Summary

Problems solved by technology

However, at present, the final effect of reinforcement cannot be effectively estimated, and once the reinforcement work is started, it is not easy to change, so it is difficult for the reinforcement construction to meet the preset standards

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