阅读说明：本技术 一种单片拱肋两铰拱桥 (Single-arch rib two-hinged arch bridge ) 是由 岳贵平 王巍 王萍 杜林清 于 2021-06-24 设计创作，主要内容包括：本申请公开了一种单片拱肋两铰拱桥,包括单片拱肋、拱脚横梁、拱脚铰接机构、拱座以及桥面结构；所述单片拱肋的两端与拱脚横梁固结；所述拱座位于所述拱脚横梁下方,通过所述拱脚铰接机构可转动式连接至所述拱脚横梁；所述桥面结构设于所述单片拱肋上。本发明在采用单片拱肋以获得上承式拱桥简洁美观造型效果的同时,确保了结构的抗倾覆稳定性；由于释放了拱脚的转动约束,从而大幅度降低了由地基变形(沉降和水平位移)导致的拱肋次应力。本发明构造简单,可应用于软土地基和岩石地基,具有很好的经济效益和推广价值。(The application discloses a single-arch-rib two-hinged arch bridge, which comprises a single-arch rib, arch foot cross beams, arch foot hinge mechanisms, arch seats and a bridge deck structure; two ends of the single arch rib are fixedly connected with the arch springing beam; the arch support is positioned below the arch springing beam and can be rotatably connected to the arch springing beam through the arch springing hinge mechanism; the bridge deck structure is arranged on the single arch rib. The invention ensures the anti-overturning stability of the structure while adopting the single arch rib to obtain the simple and beautiful modeling effect of the deck arch bridge; the rotation restraint of the arch springing is released, so that the secondary stress of the arch rib caused by foundation deformation (settlement and horizontal displacement) is greatly reduced. The invention has simple structure, can be applied to soft soil foundation and rock foundation, and has good economic benefit and popularization value.)

1. A single-piece arch rib two-hinged arch bridge is a deck type arch bridge and is characterized by comprising:

a monolithic arch rib;

the arch foot cross beam is fixedly connected with two ends of the arch rib;

the arch support is positioned at the bottom of the arch springing beam and can be rotatably connected to the arch springing beam through an arch springing hinge mechanism; and

and the bridge deck structure is arranged on the single arch rib.

2. A one-piece arch rib two-hinged arch bridge of claim 1,

the arch foot beam is a steel structural member, and the cross section of the arch foot beam is a closed section of a rectangle, a circle or a polygon;

the hunch foot crossbeam tip is equipped with two crossbeam otic placodes of relative setting, the crossbeam otic placode with the flange board and the web of hunch foot crossbeam adopt the penetration welding to reliably connect, the crossbeam otic placode orientation hunch seat one side is extended and through hunch foot hinge mechanism with the rotatable formula of hunch seat is connected.

3. The single-piece rib two-hinged arch bridge of claim 2, wherein the leg hinge mechanism comprises a pin bar, two limit pins, two support lugs; the two supporting ear plates are arranged corresponding to one beam ear plate of the arch springing beam, and the beam ear plate and the supporting ear plate are arranged at intervals; the supporting lug plate and the overlapping area of the cross beam lug plate are provided with holes, the pin rod passes through the holes to sequentially pass through the cross beam lug plate and the supporting lug plate, and two ends of the pin rod are respectively provided with a limiting pin.

4. A single-piece arch rib two-hinged arch bridge according to claim 3, wherein the side of one beam ear facing the other beam ear and the side of the support ear are stiffened by the ear.

5. The single arch rib two-hinged arch bridge of claim 4, wherein the arch springing hinge mechanism further comprises an anchor bolt and a pre-buried steel plate; the anchoring bolt is arranged in the arch support and protrudes out of the surface of the arch support at one side facing the arch springing beam; the embedded steel plate is arranged on the surface of the arch support and is anchored in the arch support through the anchoring bolt; the supporting lug plates and the lug plates are connected with the embedded steel plates in a welding mode in a stiffening mode.

6. A one-piece arch rib two-hinged arch bridge according to claim 1, wherein a column is provided between the deck structure and the arch rib; the upper ends of the upright columns are connected with the lower surface of the bridge deck structure, and the lower ends of the upright columns are fixedly connected with the upper surfaces of the arch ribs.

7. The single arch rib two-hinged arch bridge of claim 1, wherein when the single arch rib two-hinged arch bridge is installed on a soft soil foundation, a rectangular reinforced concrete frame structure with the same width as the bridge deck structure is arranged on the arch support; the upper surface of the frame structure is flush with the upper surface of the bridge deck structure; the frame structure is provided with a support on one side facing the bridge deck structure for supporting the bridge deck structure; and arranging post-platform filling soil on one side of the frame structure, which is far away from the bridge deck structure, so as to balance the horizontal thrust of the arch springing, wherein the upper surface of the post-platform filling soil is flush with the upper surface of the bridge deck structure.

8. The single arch rib two-hinged arch bridge of claim 7, wherein the abutment is provided with a pile foundation extending into the soft ground.

9. The single rib two-pronged arch bridge of claim 1, wherein when said single rib two-pronged arch bridge is placed on a rock substrate, a dome is placed on said rock substrate and a toe hinge mechanism is placed on said dome.

10. A single-piece arch rib two-hinged arch bridge according to claim 9, wherein horizontal beams are provided on the rock foundation, and supports are provided above the horizontal beams for supporting the deck structure.

Technical Field

The invention relates to the technical field of bridge engineering, in particular to a single-arch-rib two-hinge arch bridge.

Background

The through arch bridge spanning urban river channels often has higher landscape requirements, reduces the number of arch ribs, enables the bridge structure to be simple and modern, and can obviously improve the landscape effect of the space under the bridge.

The deck arch bridge is generally provided with two or more arch ribs transversely to ensure the transverse anti-overturning stability of the structure under the working condition of live load unbalance loading arrangement. When a single arch rib arrangement is adopted, in order to ensure the transverse anti-overturning stability, the arch springing is often fixed with the arch base, and the transverse width of the arch rib is larger, so that the arch rib can bear larger temperature stress caused by the fixed arch springing.

Disclosure of Invention

The invention aims to provide a single arch rib two-hinged arch bridge, which belongs to a deck type arch bridge and solves the problems that the transverse width of an arch rib of the existing single arch rib arrangement arch bridge is large, and the arch rib bears the temperature caused by arch rib consolidation and the secondary stress of the arch rib under foundation deformation (settlement and horizontal displacement) is large through the arrangement of a single arch rib, an arch rib crossbeam and an arch rib hinge mechanism.

In order to achieve the above object, an embodiment of the present invention provides a single arch rib two-hinged arch bridge, which includes a single arch rib, an arch foot beam, an arch foot hinge mechanism, an arch base, and a bridge deck structure; two ends of the single arch rib are provided with arch foot beams; the arch foot cross beam is fixedly connected with the arch rib; the arch support is positioned at the bottom of the arch springing beam and can be rotatably connected to the arch springing beam through an arch springing hinge mechanism; the bridge deck structure is arranged on the single arch rib.

Further, the arch springing crossbeam is a steel structural member, and the cross section of the arch springing crossbeam is a closed section of a rectangle, a circle or a polygon; the hunch foot crossbeam tip is equipped with two crossbeam otic placodes of relative setting, the crossbeam otic placode with the flange board and the web of hunch foot crossbeam adopt the penetration welding to reliably connect, the crossbeam otic placode orientation hunch seat one side is extended and through hunch foot hinge mechanism with the rotatable formula of hunch seat is connected.

Furthermore, the arch springing hinge mechanism comprises a pin rod, two limiting pins and two supporting ear plates; the two supporting ear plates are arranged corresponding to one beam ear plate of the arch springing beam, and the beam ear plate and the supporting ear plate are arranged at intervals; the supporting lug plate and the overlapping area of the cross beam lug plate are provided with holes, the pin rod passes through the holes to sequentially pass through the cross beam lug plate and the supporting lug plate, and two ends of the pin rod are respectively provided with a limiting pin.

And furthermore, the lug plates are arranged on the side surface of one cross beam lug plate facing to the other cross beam lug plate and on the two side surfaces of the supporting lug plate for stiffening.

Furthermore, the arch springing hinge mechanism also comprises an anchoring bolt and an embedded steel plate; the anchoring bolt is arranged in the arch support and protrudes out of the surface of the arch support at one side facing the arch springing beam; the embedded steel plate is arranged on the surface of the arch support and is anchored in the arch support through the anchoring bolt; the supporting lug plates and the lug plates are connected with the embedded steel plates in a welding mode in a stiffening mode.

Further, a column is arranged between the bridge deck structure and the arch rib; the upper ends of the upright columns are connected with the lower surface of the bridge deck structure, and the lower ends of the upright columns are fixedly connected with the upper surfaces of the arch ribs.

Furthermore, when the single-arch rib two-hinged arch bridge is arranged on a soft soil foundation, a rectangular reinforced concrete frame structure with the same width as the bridge deck structure is arranged on the arch support; the upper surface of the frame structure is flush with the upper surface of the bridge deck structure; the frame structure is provided with a support on one side facing the bridge deck structure for supporting the bridge deck structure; arranging a post-platform filling soil on one side of the frame structure, which is far away from the bridge deck structure, so as to balance the horizontal force of the arch springing; the upper surface of the filling behind the platform is flush with the upper surface of the bridge deck structure.

Furthermore, a pile foundation which is deep into the soft soil foundation is arranged below the arch center.

Further, when the single-piece arch rib two-hinged arch bridge is arranged on a rock foundation, an arch support is arranged on the rock foundation, and an arch foot hinge mechanism is arranged on the arch support.

Further, a horizontal beam is arranged on the rock foundation, and a support is arranged above the horizontal beam and used for supporting the bridge deck structure.

The invention has the beneficial effects that the single arch rib two-hinged arch bridge structure is provided, the single arch rib is adopted to support the load of the bridge deck structure, the arch foot cross beam is arranged at the arch foot, the end part of the arch rib is fixedly connected with the middle part of the arch foot cross beam, and the rotation constraint of the arch foot is released by adopting a hinged structure between the two ends of the arch foot cross beam and the arch base. The invention ensures the anti-overturning stability of the structure while adopting the single arch rib to obtain the simple and beautiful modeling effect of the deck arch bridge; the rotation restraint of the arch springing is released, so that the secondary stress of the arch rib caused by foundation deformation (settlement and horizontal displacement) is greatly reduced. The invention has simple structure, can be applied to soft soil foundation and rock foundation, and has good economic benefit and popularization value.

Drawings

The technical solution and other advantages of the present application will be presented in the following detailed description of specific embodiments of the present application with reference to the accompanying drawings.

Fig. 1 is an elevation view of a structural system of a single-piece arch rib two-hinged arch bridge provided by the invention.

Fig. 2 is a plan view of a structural architecture of the single-piece arch rib two-hinged arch bridge provided by the invention.

Fig. 3 is an elevation view showing an example of the application of the single arch rib two-hinged arch bridge of the present invention to a soft soil foundation.

Fig. 4 is an elevation view showing an example of the application of the single arch rib two-hinged arch bridge of the present invention to a rock foundation.

Fig. 5 is a cross-sectional view of the invention of fig. 3 or 4 at a different position a-a along the bridge.

Fig. 6 is a cross-sectional view of the present invention at a different position B-B along the bridge direction in fig. 3 or fig. 4.

Fig. 7 is a plan view of the position of the arch springing beam and the arch springing hinge mechanism of the present invention.

Fig. 8 is a cross-sectional view of the arch springing beam C-C of the present invention.

Fig. 9 is a cross-sectional view of the arch springing articulating mechanism D-D of the present invention.

Fig. 10 is a cross-sectional view of the arch springing hinge mechanism E-E of the present invention.

The components in the figure are identified as follows:

1-arch rib, 2-column, 3-bridge deck structure, 4-arch foot beam, 5-beam clapboard, 6-beam ear plate, 7-pin rod, 8-limit pin, 9-supporting ear plate, 10-ear plate stiffening, 11-anchor bolt, 12-embedded steel plate, 20-arch foot hinge mechanism, 21-support, 22-arch seat, 23-pile foundation, 24-frame structure, 25-post filling, 26-horizontal beam, 27-bedrock.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the connection can be mechanical connection or welding; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Specifically, referring to fig. 1 to 10, an embodiment of the present application provides a single arch rib two-hinged arch bridge, which includes a single arch rib 1, an arch foot beam 4, an arch foot hinge mechanism 20, an arch base 22, and a bridge deck structure 3; two ends of the single arch rib 1 are provided with arch foot beams 4; the arch foot cross beam 4 is fixedly connected with the arch rib 1; the arch seat 22 is positioned below the arch springing beam 4 and is rotatably connected to the arch springing beam 4 through an arch springing hinge mechanism 20; the bridge deck structure 3 is arranged on the single arch rib 1.

Further, the arch foot beam 4 is a simply supported beam with two hinged ends and capable of bearing concentrated loads of the arch rib 1 in the midspan, in order to ensure sufficient torsional rigidity and bending resistance, the cross section of the arch foot beam 4 is usually a closed cross section, and in order to facilitate connection with the arch foot hinge mechanism 20, the arch foot beam 4 is a steel structural member, and the cross section of the steel structural member is a rectangular, circular or polygonal closed cross section; the arch foot cross beam 4 is provided with two cross beam ear plates 6 which are oppositely arranged and reliably connected with the flange plates and the web plates of the arch rib cross beam 4 by fusion penetration welding; the beam ear plate 6 extends towards one side of the arch 22 and is rotatably connected with the arch 22 through an arch foot hinge mechanism 20, and the rotation restriction of the arch foot is released.

In order to enhance the connection reliability of the arch springing crossbeam 4 and the arch rib 1, crossbeam partition plates 5 are arranged in the middle of the arch springing crossbeam 4 corresponding to the two side webplates of the arch rib 1 and are connected with the arch springing crossbeam 4 in a welding mode.

Further, the arch springing hinge mechanism 20 comprises a pin 7, two limit pins 8, two supporting ear plates 9, an ear plate stiffening 10, an anchoring bolt 11 and an embedded steel plate 12; the two supporting ear plates 9 are arranged corresponding to one beam ear plate 6 of the arch springing beam 4, and the beam ear plate 6 and the supporting ear plates 9 are arranged at intervals; supporting otic placode 9 with the overlap region of crossbeam otic placode 6 sets up the trompil, round pin 7 passes through the trompil passes in proper order crossbeam otic placode 6 reaches supporting otic placode 9, and round pin 7 both ends end respectively sets up a spacer pin 8, restriction round pin 7's horizontal bridge is to the displacement. At the side of another crossbeam otic placode 6 of a crossbeam otic placode 6 the both sides face of supporting otic placode 9 sets up the otic placode and puts more energy into 10, crossbeam otic placode 6 unilateral supporting otic placode 9 is bilateral through setting up the otic placode is put more energy into 10 and is guaranteed the lateral stability of otic placode. The anchor bolts 11 are arranged in the arch support 22 and protrude out of the surface of the arch support 22 on the side facing the arch springing beam 4; the embedded steel plates 12 are arranged on the surface of the arch support 22 and are anchored in the arch support 22 through the anchoring bolts 11; the supporting lug plates 9 and the lug plate stiffening ribs 10 are connected with the embedded steel plates 12 in a welding mode. The anchor bolts 11 are uniformly arranged around the embedded steel plate 12 and are anchored in the arch foot reinforced concrete arch support 22, so that the arch foot hinge mechanism 20 is reliably connected with the arch support 22. The beam ear plate 6 is also used as an end sealing plate of the arch springing beam 4, the beam ear plate 6 transmits the load to the supporting ear plate 9 through the pin 7, and finally transmits the load to the arch base 22.

Further, a column 2 is arranged between the bridge deck structure 3 and the arch rib 1; the upper end of the upright column 2 is connected with the lower surface of the bridge deck structure 3, and the lower end of the upright column 2 is fixedly connected with the upper surface of the arch rib 1. Wherein, the bridge deck structure 3 transmits the load to the arch rib 1 through the upright post 2, the end part of the arch rib 1 is fixedly connected with the arch springing crossbeam 4, and finally the load is transmitted to the arch base 22 through the arch springing hinge mechanism 20. The arch springing beam 4 is a key stress component for realizing load dispersion and transmission between the arch rib 1 and the arch support 22, realizing arch springing hinged stress and ensuring the anti-overturning stability of the structure.

Furthermore, when the two hinged arch bridges of the single arch rib 1 are arranged on a soft soil foundation, although the arch foot hinge mechanisms 20 of the two hinged arches release arch foot bending moment, the action of constant load, live load and temperature load still has larger horizontal force; a pile foundation 23 which extends into the soft soil foundation is arranged below the arch support 22; in order to further reduce the horizontal force borne by the pile foundation 23, a rectangular reinforced concrete frame structure 24 with the same width as the bridge floor can be arranged on the reinforced concrete arch support 22. The upper surface of the frame structure 24 is flush with the upper surface of the deck structure 3; a support 21 is arranged on the top of one side wall of the frame adjacent to the main bridge and used for supporting the bridge deck structure 3; a set of back fill 25 may be provided on the side of the reinforced concrete frame structure 24 remote from the main bridge to balance the horizontal force transmitted by the arch rib 1 to the reinforced concrete abutment 22 with the active earth pressure of the set of back fill 25. That is, the frame structure 24 is provided with a support 21 on the side facing the deck structure 3 for supporting the deck structure 3; a platform back filling 25 is arranged on one side of the frame structure 24 far away from the bridge deck structure 3, and the upper surface of the platform back filling 25 is flush with the upper surface of the bridge deck structure 3. The frame structure 24 can be used as a bank protection structure, and the hollow part of the frame structure 24 can be used as a flood control channel or a river footpath.

Further, when the single-piece arch rib two-hinged arch bridge is arranged on a rock foundation, an arch abutment 22 is arranged on a bed rock 27 of the rock foundation, and an arch springing hinging mechanism 20 is arranged in the arch abutment 22, so that the arch springing beam 4 is reliably connected with the arch abutment 22. And lying beams 26 are arranged on bedrock 27 of the rock foundation, and supporting seats 21 are arranged on the lying beams 26 for supporting the deck structure 3.

The invention has the beneficial effects that the single arch rib two-hinged arch bridge structure is provided, the single arch rib is adopted to support the load of the bridge deck structure, the arch foot cross beam is arranged at the arch foot, the end part of the arch rib is fixedly connected with the middle part of the arch foot cross beam, and the rotation constraint of the arch foot is released by adopting a hinged structure between the two ends of the arch foot cross beam and the arch base. The invention ensures the anti-overturning stability of the structure while adopting the single arch rib to obtain the simple and beautiful modeling effect of the deck arch bridge; the rotation restraint of the arch springing is released, so that the secondary stress of the arch rib caused by foundation deformation (settlement and horizontal displacement) is greatly reduced. The invention has simple structure, can be applied to soft soil foundation and rock foundation, and has good economic benefit and popularization value.

The bridge structure form provided by the embodiment of the application is described in detail, a specific example is applied in the description to explain the principle and the implementation of the application, and the description of the embodiment is only used for helping to understand the technical scheme and the core idea of the application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.