Half-through continuous beam-arch combined bridge

Abstract

The utility model discloses a half-through type continuous beam-arch combined bridge which comprises an arch support and an arch foot section which are located on a middle span, a transition pier located on a side span, a main bridge deck supported by the transition pier, the arch support and the arch foot section together, an arch rib and an auxiliary arch. A main longitudinal beam and the arch rib all adopt an integral box type section at a side span arch beam node, a middle span arch beam node and an arch foot node. According to the utility model, a, a wind-brace-free design is adopted, so that the defect that wind brace rods are messy is avoided, and the driving view permeability is improved; b, in a high-intensity area, the requirement for the anti-seismic performance of a half-through arch bridge is high, a seismic mitigation and isolation system design is adopted on the basis of the half-through beam-arch combined bridge, namely, a double-curved-surface spherical seismic mitigation and isolation support is arranged between an arch seat and an arch foot node, and the anti-seismic performance of the bridge is improved; and c, the problem that the steel bridge deck pavement is easy to crack is effectively solved by adopting the steel-concrete composite beam, the maintenance work is reduced, and the purpose of multiple functions is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge construction, and particularly relates to a half-through continuous beam-arch composite bridge. Background Art

[0002] The arch bridge is one of the common bridge types. The half-through arch bridge is an arch bridge with the main arch ring located in the middle of the bridge deck system. Usually, multiple arch ribs are used to jointly bear the load. The half-through arch bridge has the advantages of large spanning capacity and light structure. Due to its special structural form, it is often applied to urban bridges and becomes one of the landmark buildings in the city. The arch-beam combination is a typical composite structure system, which combines the compressive performance of the arch and the flexural performance of the beam, and fully exerts the characteristics of the two structures. For the flying swallow type arch bridge, the form of wind bracing is usually adopted to enhance the structural stability. The defect of such design is that it will lead to an insufficiently open driving view; generally speaking, in low-intensity areas, the main arch is usually fixedly connected to the arch seat, but in high-intensity areas, under the action of earthquake, the reaction force of the arch seat foundation is very large, and it is difficult to realize the foundation design. Content of the Utility Model

[0003] In view of this, the purpose of the utility model is to provide a half-through continuous beam-arch composite bridge to solve the deficiencies in the prior art.

[0004] In order to achieve the above purpose, the utility model is realized through the following technical solutions:

[0005] Provide a half-through continuous beam-arch composite bridge, which includes an arch seat, an arch foot section located in the middle span, a transition pier located in the side span, and a main bridge deck, arch ribs, and secondary arches jointly supported by the transition pier, the arch seat, and the arch foot section. The main bridge deck is composed of main longitudinal beams, main cross beams, and bridge deck slabs. The main longitudinal beams are connected to the arch ribs through suspenders. A sidewalk cantilever is arranged outside the main longitudinal beams. The arch foot section includes a side-span arch-beam node, an arch foot node, and a middle-span arch-beam node connected in sequence. The side-span arch-beam node is supported by the transition pier. The middle-span arch-beam node connects the arch ribs and the main longitudinal beams. The main longitudinal beams and the arch ribs adopt an integral box section at the side-span arch-beam node, the middle-span arch-beam node, and the arch foot node.

[0006] As the half-through continuous beam-arch composite bridge, no wind bracing is provided between the arch ribs.

[0007] As the half-through continuous beam-arch composite bridge, a seismic isolation and energy dissipation bearing is provided between the arch seat and the arch foot node.

[0008] As the half-through continuous beam-arch composite bridge, an arch foot cross beam is provided between the arch foot nodes.

[0009] As described in the half-through continuous beam-arch composite bridge, the bridge deck adopts precast concrete slabs.

[0010] The beneficial effects of the technical solution of the present utility model are as follows:

[0011] a. The windless bracing design is adopted to avoid the disadvantage of messy wind bracing members and improve the permeability of the driving vision;

[0012] b. In high-intensity seismic regions, higher seismic performance requirements are imposed on half-through arch bridges. Based on the half-through beam-arch composite bridge, a seismic isolation and energy dissipation system is designed, that is, a hyperbolic spherical seismic isolation and energy dissipation bearing is arranged between the arch seat and the arch foot node to improve the seismic performance of the bridge;

[0013] c. The steel-concrete composite beam is adopted to effectively solve the problem of easy cracking of the steel bridge deck pavement, reduce the maintenance work, and achieve the purpose of multiple functions. Description of the Drawings

[0014] To further illustrate the above-mentioned objects, structural features and effects of the present utility model, the present utility model will be described in detail below with reference to the drawings.

[0015] Figure 1 It is a schematic elevation layout diagram of the half-through continuous beam-arch composite bridge in the preferred embodiment of the present utility model;

[0016] Figure 2 It is a schematic cross-section layout diagram of the half-through continuous beam-arch composite bridge in the preferred embodiment of the present utility model;

[0017] Figure 3 It is a partial elevation schematic diagram at the arch foot node in the preferred embodiment of the present utility model;

[0018] Figure 4 It is a partial elevation schematic diagram at the arch foot crossbeam in the preferred embodiment of the present utility model;

[0019] Figure 5 It is a partial elevation schematic diagram at the side span arch-beam node in the preferred embodiment of the present utility model;

[0020] Figure 6 It is a partial elevation schematic diagram at the mid-span arch-beam node in the preferred embodiment of the present utility model;

[0021] In the figure: 1. Arch seat; 2. Transition pier; 3. Arch rib; 4. Secondary arch; 5. Main longitudinal beam; 6. Main crossbeam; 7. Bridge deck; 8. Suspender; 9. Sidewalk cantilever; 10. Side span arch-beam node; 11. Arch foot node; 12. Mid-span arch-beam node; 13. Cap; 14. Pile foundation; 15. Arch foot crossbeam; 16. Seismic isolation and energy dissipation bearing. Detailed Embodiment

[0022] The term "utility model" used in this specification, and "the present utility model" are intended in a broad sense to refer to all the subject matters of this specification and any of the following patent claims. Statements containing these terms should not be construed as limiting the subject matters described herein or the meaning or scope of any of the following patent claims. In addition, this specification does not attempt to describe or limit the subject matters covered by any specific component, paragraph, statement, or claim of the present application. The subject matters should be understood with reference to the entire specification, all the drawings, and any of the following claims. The present utility model may have other embodiments and may be practiced or implemented in other ways. Moreover, it should be understood that the wording and terms adopted herein are for illustrative purposes and should not be considered as limiting.

[0023] Details of the present utility model will now be discussed with reference to the drawings which illustrate the present utility model by way of example only. In the drawings, like features or components may be labeled with the same reference numerals.

[0024] The use of "comprising", "having", "including" and their variants herein means including the items listed hereinafter and their equivalents and additional items. Although directions such as above, below, upward, downward, backward, bottom, top, front, back, etc. may be referred to in describing the drawings for convenience with reference to the drawings. These directions are not intended to be literally accepted or limit the present utility model in any form. In addition, terms such as "first", "second", "third", etc. are used herein for illustrative purposes and are not intended to indicate or imply importance or significance.

[0025] Referring to Figures 1 to 6 as shown, the through type continuous beam-arch composite bridge in the present utility model includes an arch seat 1 located in the mid-span, an arch foot section, a transition pier 2 located in the side span, and a main bridge deck, an arch rib 3, and a secondary arch 4 jointly supported by the transition pier 2, the arch seat 1, and the arch foot section. The main bridge deck is composed of main longitudinal beams 5, main cross beams 6, and a bridge deck 7. The main longitudinal beams 5 are connected to the arch rib 3 by suspender bars 8, and a sidewalk cantilever 9 is provided outside the main longitudinal beams 5. The arch foot section includes a side span arch beam node 10, an arch foot node 11, and a mid-span arch beam node 12 connected in sequence. The side span arch beam node 10 is supported by the transition pier 2. The mid-span arch beam node 12 connects the arch rib 3 and the main longitudinal beams 5. The main longitudinal beams 5 and the arch rib 3 adopt an integral box section at the side span arch beam node 10, the mid-span arch beam node 12, and the arch foot node 11. The through type beam-arch composite structure in the present utility model is jointly composed of two arch ribs 3, two main longitudinal beams 5, suspender bars 8 connecting the arch rib 3 and the main longitudinal beams 5, main cross beams 6, sidewalk cantilevers 9, and a bridge deck 7 to form a spatial force system. Below the arch seat 1 are a bearing platform 13 and pile foundations 14.

[0026] It should be noted that no wind bracing is provided between the arch ribs 3 of the through type continuous beam-arch composite bridge in the present utility model, and the structural stability is improved by adding an arch foot cross beam 15 between the two side arch foot nodes 11.

[0027] Continuing to refer to the drawings, a seismic isolation and vibration reduction bearing 16 is provided between the arch abutment 1 and the arch springing joint 11, that is, a seismic isolation and vibration reduction system using a hyperbolic spherical seismic isolation and vibration reduction bearing.

[0028] To reduce the bridge deck maintenance work, precast concrete slabs are used as the bridge deck 7, which can effectively solve the problem of fatigue cracking of orthotropic steel bridge decks.

[0029] The specific construction steps of this mid - supported continuous beam - arch composite bridge are as follows:

[0030] a. Set up a construction platform and construct the pile foundation 14, the pile cap 13, the transition pier 2 and the arch abutment 1.

[0031] b. Prefabricate the concrete bridge deck and prefabricate the steel girders and steel arches in the factory.

[0032] c. Set up scaffolds and successively assemble the arch springing section, the arch springing cross - beam 15, the side - span arch - beam joint 10, the mid - span arch - beam joint 12, the standard section of the arch rib, the standard section of the main longitudinal beam, the main cross - beam 6, and the sidewalk cantilever 9 on the scaffolds.

[0033] d. Install the suspender 8 and conduct the first tensioning. After the tensioning is completed, remove the temporary scaffolds.

[0034] e. Install the precast bridge deck.

[0035] f. Conduct the second tensioning of the suspenders.

[0036] g. Pour the wet joints of the bridge deck 7 section by section in the order from the mid - span to the arch springing.

[0037] h. Construct the auxiliary structures of the whole bridge.

[0038] i. Adjust the cable forces of the main bridge to the completed - bridge state.

[0039] j. Conduct a traffic trial.

[0040] The above is only a preferred embodiment of the present utility model, and it does not limit the implementation manners and protection scope of the present utility model. For those skilled in the art, it should be realized that all equivalent replacements and obvious changes made by using the content of the specification and drawings of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A half-through continuous beam-arch composite bridge, characterized in that, It includes an arch seat located in the mid-span, an arch foot section, a transition pier located in the side span, and a main bridge deck, an arch rib, and a secondary arch jointly supported by the transition pier, the arch seat, and the arch foot section. The main bridge deck is composed of main longitudinal beams, main cross beams, and bridge deck slabs. The main longitudinal beams are connected to the arch rib through suspenders. A sidewalk cantilever is provided on the outer side of the main longitudinal beams. The arch foot section includes a side-span arch beam node, an arch foot node, and a mid-span arch beam node connected in sequence. The side-span arch beam node is supported by the transition pier. The mid-span arch beam node connects the arch rib and the main longitudinal beams. The main longitudinal beams and the arch rib adopt an integral box section at the side-span arch beam node, the mid-span arch beam node, and the arch foot node.

2. The through continuous beam-arch composite bridge according to claim 1, wherein No wind bracing is provided between the arch ribs.

3. The through continuous beam-arch composite bridge according to claim 1, wherein A seismic isolation and vibration reduction bearing is provided between the arch seat and the arch foot node.

4. The through type continuous beam arch composite bridge according to claim 1, characterized in that, An arch foot cross beam is provided between the arch foot nodes.

5. The through-type continuous beam-arch composite bridge according to claim 1, wherein The bridge deck slab adopts precast concrete slabs.

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