Transverse prestress reinforcement method of railway simply-supported T beam

A technology of transverse prestressing and prestressing steel beams, which is applied in bridge reinforcement, bridge, bridge maintenance, etc., can solve the problems that the reinforcement construction is difficult to meet the preset standards and is not easy to change, and achieve the improvement of transverse stiffness, good precision and accuracy Effect

Inactive Publication Date: 2019-07-05
中铁科学研究院有限公司
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Problems solved by technology

However, at present, the final effect of reinforcement cannot be effectively estimated, and once the reinforcement work

Method used

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  • Transverse prestress reinforcement method of railway simply-supported T beam
  • Transverse prestress reinforcement method of railway simply-supported T beam
  • Transverse prestress reinforcement method of railway simply-supported T beam

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Embodiment Construction

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments, and the mode of the present invention includes but not limited to the following embodiments.

[0036] Shanxi Yinhuo Railway was built in 1986 and opened to traffic in 1993. It is located in Hequ County, Shanxi Province. It is a local single-track railway connecting Yinta to Huoshan. The total length of the main line is 33.3km. It is a prestressed concrete simply supported girder bridge with a speed limit of 40km / h along the entire line. In 2013, the annual transportation volume of the Yinhuo Line was 8 million tons, and it was a non-electrified railway. In order to meet the new freight volume task, the C64K freight train will be phased out gradually, and then the C80 freight train will be operated, with an expected annual freight volume of 15 million tons. In 2013, the operating unit carried out bridge inspection and load tests on the bridges along the ent...

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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...

Claims

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Application Information

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IPC IPC(8): E01D22/00
CPCE01D22/00
Inventor 于贵江亚男张凡陈俊栋熊模友那通兴曾铁森吴华丽
Owner 中铁科学研究院有限公司
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