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Assembled simple support box beam structure of PVA fiber cement base composite material and manufacturing method

A fiber cement, composite material technology, applied in bridges, manufacturing tools, ceramic molding machines, etc., to achieve the effect of enhancing durability, improving ductility, and improving crack resistance

Active Publication Date: 2018-03-30
INNER MONGOLIA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the new project still adopts the traditional construction scheme

Method used

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  • Assembled simple support box beam structure of PVA fiber cement base composite material and manufacturing method
  • Assembled simple support box beam structure of PVA fiber cement base composite material and manufacturing method
  • Assembled simple support box beam structure of PVA fiber cement base composite material and manufacturing method

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] Such as Figure 1-5 As shown, a prefabricated simply supported box girder structure of PVA fiber cement-based composite material, including outer cladding and inner lining 1, embedded parts 2, tensile steel bars 3, stirrups 8, bellows 6, telescopic Steel pipe 7, ordinary concrete 5, compression steel bar 4 and prestressed tendons;

[0032] The outer cladding layer and the inner lining layer 1 are spliced ​​by PVA fiber cement-based composite material board sections; the mix ratio of the PVA fiber cement-based composite material is: cement 380kg / m 3 , Class I high calcium fly ash 910kg / m 3 , water 330kg / m 3 , quartz sand 455kg / m 3 , the water reducer accounts for 4.71% of the cement mass, the foaming agent accounts for 1.57% of the sum of the cement and Class I high-calcium fly ash, and the PVA fiber accounts for 1.88% of the total vo...

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Abstract

The invention discloses an assembled simple support box beam structure of a PVA fiber cement base composite material and a manufacturing method. The assembled simple support box beam structure comprises an outer wrapping layer, a lining layer, embedded parts, pulled steel bars, stirrups, a corrugated pipe, a telescopic steel pipe, ordinary concrete, pressed steel bars and prestress ribs. The outerwrapping layer and the lining layer are formed by splicing PVA fiber cement base composite material plate sections. The embedded parts are arranged on the inner surface of the outer wrapping layer and the outer surface of the lining layer and are steel T-shaped anti-shear connection pieces. The pulled steel bars and the stirrups are arranged inside the outer wrapping layer and the lining layer. The pressed steel bars and the prestress ribs are arranged in the ordinary concrete. The telescopic steel pipe is arranged between the outer wrapping layer and the lining layer. The assembled simple support box beam structure can serve as a template of a box beam to be used at the prefabrication stage; and in addition, after the box beam is formed, the assembled simple support box beam structure can serve as a protection layer of concrete in the box beam, the ductility of a bridge can be effectively improved, and the crack and shock resisting performance and the like of the bridge are improved.

Description

technical field [0001] The invention relates to a composite structure, in particular to a composite prefabricated box girder structure for bridge construction. Background technique [0002] The simply supported box girder is characterized by its excellent mechanical properties - greater rigidity, strong torsional performance, simple structure, clear force, material saving, convenient erection and installation, large spanning capacity, and good visual effect under the bridge And other advantages, and are widely used in the superstructure of urban bridges and high-grade highway overpasses. [0003] Under the combined steel formwork construction technology, the generally durable concrete surface of the traditional box girder structure formed is naturally exposed, and the crack resistance, earthquake resistance, and durability are low, especially in the construction of railway box girders. This problem is particularly prominent. In order to improve the service life of the box g...

Claims

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Application Information

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IPC IPC(8): B28B23/04B28B1/52B28B1/04B28B1/093E01D2/04C04B28/00
CPCB28B1/045B28B1/093B28B1/525B28B23/04C04B28/00E01D2/04C04B18/08C04B14/06C04B2103/302C04B16/0641
Inventor 刘曙光景浩闫长旺张菊
Owner INNER MONGOLIA UNIV OF TECH
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