CN-121976453-A - Box-shaped composite bridge supported by arches

Abstract

The invention discloses an arch-supported box-shaped composite bridge, which comprises a box girder concrete top plate, a concrete top plate anchor beam, a box girder concrete bottom plate, a concrete bottom plate anchor beam, a vertical support steel pipe, an arc-shaped steel box girder, a steel flange plate, nuts and screws, wherein the box girder concrete top plate and the box girder concrete bottom plate are arranged in parallel, and the arc-shaped steel box girder is arranged between the box girder concrete top plate and the box girder concrete bottom plate to form a combined box girder structure. The invention adopts the arc steel box girder with longitudinal through length to enhance the integrity of the combined box girder, reduces the material consumption of the upper structure and the lower structure of the bridge compared with the traditional single-box multi-chamber box girder bridge, obtains better structural stability, has attractive appearance, adopts the roll forming process and the modularized connection design of the arc steel box girder, has the advantages of convenient construction and installation of a prefabricated assembly type structure, effectively reduces the cost, provides a light-weight and high-strength preferable scheme for wide bridge decks and long-span bridges, and has remarkable economic benefit and popularization value.

Inventors

• CHEN YANG
• JIA HONGXUE
• ZHANG RUOHAO
• ZHANG CHI
• TONG JINGZHONG
• LI QINGHUA
• ZHAO SHENGYING
• CHEN YUNLONG
• ZHANG YUNPENG
• YU CHENGDA
• WU BIAO
• Chai Jilong

Assignees

• 中国建筑第八工程局有限公司
• 浙江大学

Dates

Publication Date

20260505

Application Date

20251204

Claims (8)

1. 1. An arch-supported box composite bridge comprising: A box girder concrete top plate; a box girder concrete bottom plate; The vertical support steel pipes are arranged between the box girder concrete top plate and the box girder concrete bottom plate; And the arc-shaped steel box girder is arranged between the box girder concrete top plate and the box girder concrete bottom plate.
2. 2. The arch-supported box composite bridge of claim 1, wherein one end of the vertical support steel pipe is welded with a first screw and the other end of the vertical support steel pipe is welded with a second screw.
3. 3. The arch-supported box composite bridge of claim 2, wherein the box girder concrete top plate and the box girder concrete bottom plate are provided with through holes, the first screw rod penetrates through the through holes of the box girder concrete top plate to be locked and fixed with a first nut, and the second screw rod penetrates through the through holes of the box girder concrete bottom plate to be locked and fixed with a second nut.
4. 4. The arch-supported box composite bridge of claim 1, wherein the opening of the arcuate steel box girder is oriented toward the box girder concrete floor.
5. 5. The arch-supported box composite bridge of claim 4, wherein the top of the arched steel box girder is attached to the concrete roof of the box girder and is locked and fixed by a fourth screw and a fourth nut.
6. 6. The arch-supported box-shaped composite bridge of claim 5, wherein the top of the arc-shaped steel box girder and the concrete top plate of the box girder are respectively provided with a through hole for the fourth screw rod to pass through, and two ends of the fourth screw rod after passing through the through holes are locked and fixed with the fourth nuts.
7. 7. The arch-supported box composite bridge of claim 1, wherein the edges of the two sides of the arc-shaped steel box girder extend to form steel flange plates, and the steel flange plates are attached to the concrete bottom plate of the box girder and are locked and fixed through third screws and third nuts.
8. 8. The arch-supported box-shaped composite bridge according to claim 7, wherein the concrete bottom plate and the steel flange plate of the box girder are respectively provided with a through hole for the third screw rod to pass through, and two ends of the third screw rod after passing through the through holes are locked and fixed with the third nuts.

Description

Box-shaped composite bridge supported by arches Technical Field The invention belongs to the technical field of bridge engineering, and particularly relates to an arch-supported box-shaped composite bridge. Background Along with the deep fusion of regional economy and the acceleration of the urbanization process, the modern highway traffic system gradually tends to have large flow and large axle load, and increasingly, the high flow traffic and heavy vehicles have more stringent requirements on the bearing capacity, durability and applicability of bridge structures. In order to meet the requirements of bridge structures in the directions of long span, wide bridge deck and light weight, the box-shaped composite bridge with arch support is getting more and more attention of bridge designers. In order to meet the requirement of large span, the traditional prestressed concrete box girder bridge, particularly a common single-box multi-chamber structure, often relies on increasing the girder height, thickening the web and the top and bottom plate dimensions, which directly leads to a significant increase of the dead weight of the structure. The huge dead weight not only becomes a main bottleneck for limiting the further breakthrough of the span of the bridge, but also causes the scale of the lower structure (such as the bridge pier and the foundation) to be forced to be enlarged, so that the material consumption and the engineering cost are synchronously increased. In addition, the conventional concrete web is easy to have oblique cracks and other problems in long-term use, and the durability and safety reserve of the structure are affected. Disclosure of Invention In order to overcome the limitations, the invention provides an arch-bearing box-shaped composite bridge structure. The core innovation of the structure is that the arc steel box girder formed by rolling is adopted to replace the traditional concrete web, a vertical supporting steel pipe is arranged between a box girder concrete top plate and a bottom plate, and the vertical supporting steel pipe is rigidly connected with the concrete top plate and the bottom plate through an anchoring system, so that a set of efficient and definite force transfer system is formed. The structure can obviously reduce the dead weight of the upper structure of the bridge, improve the overall stress performance of the box girder bridge, increase the span of the bridge, improve the shearing resistance of the box girder, improve the stress state of the bridge, and improve the construction efficiency of the full prefabricated assembly type operation, and has wide application range, full feasibility and popularization value. The invention mainly aims to overcome the technical defects of large structural weight, easy web cracking, limited effective flange width and the like of the traditional concrete box girder and provides a novel arch-supported box-shaped composite bridge structure. According to the structure, the shear rigidity and the overall stability of the box girder web are obviously improved through an innovative arched steel box girder and steel pipe support composite system, and the force flow transmission path from the concrete top plate to the bottom plate is optimized, so that the stress of the structure is more reasonable. Meanwhile, the design greatly reduces the field construction difficulty and period through the connection mode of light structure and prefabrication assembly, and provides an innovative solution with excellent mechanical properties, good economy and remarkable industrial popularization value for wide bridge deck and large span bridge engineering. In order to solve the technical problems of the invention, the invention is realized by the following technical scheme: An arch-supported box composite bridge comprising: A box girder concrete top plate; a box girder concrete bottom plate; The vertical support steel pipes are arranged between the box girder concrete top plate and the box girder concrete bottom plate; And the arc-shaped steel box girder is arranged between the box girder concrete top plate and the box girder concrete bottom plate. One end of the vertical support steel pipe is welded with a first screw rod, and the other end of the vertical support steel pipe is welded with a second screw rod. The box girder concrete top plate and the box girder concrete bottom plate are respectively provided with a through hole, the first screw rod penetrates through the through holes of the box girder concrete top plate and is locked and fixed with the first nut, and the second screw rod penetrates through the through holes of the box girder concrete bottom plate and is locked and fixed with the second nut. And the opening of the arc steel box girder faces to the concrete bottom plate of the box girder. The top of the arc steel box girder is attached to the concrete top plate of the box girder and locked and fixed through a fourth screw and a fourth n