Transverse pre-stress I-shaped box girder structure

A technology of transverse prestressing and I-beams, applied to bridges, bridge parts, bridge materials, etc., can solve problems such as shortening the service life of bridges, increasing maintenance costs and difficulties, affecting normal use and operation of bridges, and achieving improved resistance. Torsional stability, reduced maintenance and repair times, improved overall stability and durability

Pending Publication Date: 2017-09-08
内蒙古综合交通科学研究院有限责任公司
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Problems solved by technology

The bridge deck is very prone to longitudinal cracks under the action of vehicles, forming a single-slab stress situation, which seriously affects the normal use and operation of the bridge, increases the maintenance cost and difficulty, and shortens the service life of the bridge

Method used

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  • Transverse pre-stress I-shaped box girder structure
  • Transverse pre-stress I-shaped box girder structure
  • Transverse pre-stress I-shaped box girder structure

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with accompanying drawing.

[0019] Figure 1~5 Middle, 1. I-beam; 2. Wet joint concrete; 3. Transverse prestressed tendon; 4. Anchorage; 5. Reserved tunnel; 6. Concrete diaphragm; 7. Longitudinal prestressed tendon; Reserved holes; 9. Wet joint connection reinforcement; 10. Concrete diaphragm connection reinforcement; 11. Longitudinal common reinforcement.

[0020] Depend on Figure 1 to Figure 5 It can be seen that the transverse prestressed I-shaped box girder structure is composed of a plurality of I-beams 1. Wet the joint concrete 2 between the I-beam roofs, and set the wet joint connecting steel bar 9 at the outer end of the I-beam roof; Transverse prestressed tendons 3 are set in the channel, and the two ends of the transverse prestressed tendons are anchored by anchors 4; the joint concrete 2 is also humidified at the joint of the bottom plates of the two I-beams, and the above-mentioned con...

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Abstract

A transverse pre-stress I-shaped box girder structure is composed of a plurality of I-shaped beams (1) arranged in the longitudinal direction; wet joint concrete (2) is added between every two I-shaped beam top plates, and a plurality of concrete transverse partition plates (6) are arranged in each I-shaped beam; transverse reserved hole channels (5) are formed in the positions, provided with the concrete transverse partition plates, of each I-shaped beam, and transverse pre-stress ribs (3) are arranged in the reserved hole channels; the joint of every two I-shaped beam bottom plates is also provided with wet joint concrete (2); pouring reserved holes (8) are formed in the positions, corresponding to the connection positions of the concrete transverse partition plates, of the I-shaped beam bottom plates. The device is reasonable in structure, the transverse pre-stress ribs and the longitudinal pre-stress ribs form a pre-stress network framework, the overall rigidity of a bridge structure is improved, the overall stability and durability of the bridge structure are greatly improved, and the maintenance cost is reduced. Construction is convenient, the I-shaped beams can be prefabricated in a factory, and then a small amount of cast-in-place can be conducted on site, so that the quality is easy to control, transportation is convenient, and the construction cost is reduced.

Description

technical field [0001] The invention relates to a small and medium span bridge superstructure composed of prefabricated components, specifically a transverse prestressed I-shaped box girder structure. Background technique [0002] At present, most of the highway bridges with small and medium spans adopt longitudinally prestressed hollow slab girders or non-longitudinal prestressed hollow slab girders, because only the upper part of the hollow slab girders is connected by cast-in-place joints, while the lower part has no connection. The bridge deck is very prone to longitudinal cracks under the action of vehicles, forming a single-slab stress situation, which seriously affects the normal use and operation of the bridge, increases the maintenance cost and difficulty, and shortens the service life of the bridge. Therefore, it is very meaningful to research and innovate the existing hollow slab beam structure. Contents of the invention [0003] The purpose of the present inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D2/00E01D19/06E01D101/28
CPCE01D2/00E01D19/067E01D2101/28
Inventor 张广张俊光辛国树白志平乔志程国义张洪伟张宇杰范振华于国信王珂尹峰
Owner 内蒙古综合交通科学研究院有限责任公司
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