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Combined box girder

A combined box and steel box girder technology, applied in bridges, bridge parts, bridge materials, etc., can solve the problems of poor bonding and easy cracking of the pavement layer, and achieve easy fatigue cracking, reliable bonding, and increased rigidity Effect

Inactive Publication Date: 2012-07-11
GUANGDONG GUANYUE HIGHWAY & BRIDGE +2
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to propose a combined box girder, which can effectively solve the problems of poor bonding and easy cracking between the general steel box girder and the bridge deck pavement

Method used

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Embodiment Construction

[0015] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0016] figure 1 It is a structural schematic diagram of a composite box girder in a specific embodiment of the present invention. Such as figure 1 As shown, the composite box girder includes a steel box girder 1 and an ultra-high toughness concrete layer 2. The thickness of the ultra-high toughness concrete layer is 5 cm, with steel bars in the middle. Bond between ductile concrete layer and steel box girder.

[0017] Among them, the ultra-high toughness concrete STC in the ultra-high toughness concrete layer is a new type of high-strength and high-toughness material, with a compressive strength of 110 to 160MPa and a flexural strength of 20 to 50MPa, much higher than ordinary concrete. Its mixing ratio is 21% to 45% of cement, 5% to 15% of silica fume, 0 to 15% of fly ash, 33% to 58% of quartz s...

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Abstract

The invention discloses a combined box girder, which comprises a steel box girder and an ultrahigh-ductility concrete layer, wherein the ultrahigh-ductility concrete layer is arranged above the steel box girder and is bonded with the steel box girder. By adopting the technical scheme, the bonding between the ultrahigh-ductility concrete layer and the steel box girder is reliable, the expansion coefficients are the same, the problem that the deck of a steel pavement structure is apt to be fatigued and cracked can be effectively solved, the rigidity of the combined box girder is improved, the durability is increased and the antifatigue performance is better.

Description

technical field [0001] The invention relates to the technical field of bridge structures, in particular to a composite box girder. Background technique [0002] At present, more and more steel bridges are being built, and asphalt concrete pavement is generally used on the deck of steel bridges. However, the use of asphalt concrete is not only expensive, but also the expansion coefficients of asphalt concrete and steel plates are different, resulting in weak bonding between asphalt concrete and steel plates, which is prone to fatigue cracking and other diseases. Contents of the invention [0003] The purpose of the present invention is to provide a combined box girder, which can effectively solve the problems of poor bonding and easy cracking between the general steel box girder and the bridge deck pavement. [0004] For reaching this purpose, the present invention adopts following technical scheme: [0005] A composite box girder comprises a steel box girder and an ultra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/00C04B28/00E01D101/26
Inventor 肖礼经谢学钦周志敏陈刚
Owner GUANGDONG GUANYUE HIGHWAY & BRIDGE
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