CN220685757U - Novel aqueduct superstructure - Google Patents

Abstract

The utility model discloses a novel aqueduct upper structure, which comprises a main beam, wherein the main beam is of a box-shaped structure with a through inside, arch ribs are arranged above two sides of the main beam, a cross brace is arranged between the arch ribs, arch legs are connected to two ends of the arch ribs, the arch legs are fixed to two ends of the main beam, suspenders are connected between the arch ribs and the main beam, the suspenders are vertically arranged, the adjacent suspenders keep equal distance, the main beam is thickened to the horizontal outer side and the beam bottom at the arch legs, and three-way prestress beam steel strands are arranged inside the arch legs. The novel aqueduct has the advantages that the upper structure of the aqueduct is a steel pipe concrete arch-beam combined structure aqueduct, the span can be increased to 50-100 m, the novel aqueduct has strong bearing capacity and rigidity, and the requirement of a large-span aqueduct crossing a railway is met; the structure has the functions of draining water and flood and traffic, and is equivalent to the combined construction of two structures of a conventional aqueduct and a pedestrian overpass, so that the investment and the land are saved; the structure provides underbridge clearance to the maximum extent for the underriding arch bridge, and meets railway limit requirements.

Description

Novel aqueduct superstructure

Technical Field

The utility model belongs to the technical field of railway engineering construction, and particularly relates to a novel aqueduct superstructure.

Background

The aqueduct is a common water conservancy structure for conveying canal water, discharging flood, discharging sand, navigation or diversion. In China, the span of the aqueduct structure is generally smaller, the span is generally in the range of 8m-15m, the upper structure is generally a U-shaped reinforced concrete simply supported beam, the upper structure is supported on a gravity type concrete abutment through a support, and the structure starting point and the structure ending point are connected with the existing ditch in sequence through the aqueduct type abutment.

The mountain area proportion of China is large, when mountain area railways cut off mountain front area ditch flood discharge and resident travel roads in a cutting mode, aqueducts must be designed to connect ditches to cross railway cutting drainage, and then overpasses are arranged to cross railways after existing travel roads are changed. The adoption of the aqueduct and overpass separate construction method brings about the increase of investment and new land. From the standpoint of reducing investment and saving land, it is necessary to span railways in such a manner that the aqueducts and overpasses are built together.

Because the space between railway tracks is narrow and small, communication signal facilities are required to be placed, piers cannot be erected between the railway tracks generally when an aqueduct scheme is designed, meanwhile, the safety required by railways is high, the piers need to be a certain safety distance away from the railway tracks, when railway forms are cutting and double lines or more tracks are arranged, the conventional small-span aqueduct structure cannot be applied at all, and the aqueduct structure needs to span the railway by adopting a large-span structure.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a novel aqueduct upper structure.

The utility model realizes the aim through the following technical scheme:

the utility model provides a novel aqueduct superstructure, includes the girder, the girder is the inside box structure that link up, girder both sides top is equipped with the arch rib, be equipped with the stull between the arch rib, the arch rib both ends are connected with the arch foot, the arch foot is fixed in the girder both ends, the arch rib with be connected with the jib between the girder, the jib is vertical to be set up and adjacent the jib keeps equidistant.

Furthermore, the main beam is thickened towards the horizontal outer side and the beam bottom at the arch springing.

Furthermore, the main beam is internally provided with a three-way pre-stress beam at the arch springing.

Further, the whole arch rib is of a steel tube concrete structure.

Furthermore, the arch rib adopts a double-limb structure.

Further, the cross braces are respectively connected with the double-limb structures of the arch ribs, and a K-shaped steel tube concrete supporting structure is arranged between the two cross braces.

Further, the boom adopts parallel steel wire ropes.

Further, the span of the main beam is 50m-100m.

Furthermore, the middle of the upper surface of the main beam is provided with a traffic lane, the two sides of the main beam are provided with pavement plates, and the outer sides of the pavement plates are provided with guardrails.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model provides a novel aqueduct upper structure, which is a steel pipe concrete arch-beam combined structure aqueduct, the span can be improved to 50-100 m, the aqueduct upper structure has strong bearing capacity and rigidity, and the requirement of a large-span aqueduct crossing a railway is met; the structure has the functions of draining water and flood and traffic, and is equivalent to the combined construction of two structures of a conventional aqueduct and a pedestrian overpass, so that the investment and the land are saved; the structure provides underbridge clearance to the maximum extent for the underriding arch bridge, and meets railway limit requirements.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.

The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the utility model, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present utility model, should fall within the ambit of the technical disclosure.

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a middle structure of an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of an end structure of an embodiment of the present utility model;

in the figure: 1-arch rib, 2-suspender, 3-arch foot, 4-girder, 5-stull, 6-prestressing force bundle.

Detailed Description

Exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

As shown in fig. 1 to 3, the utility model provides an embodiment of a novel aqueduct superstructure, which comprises a main beam 4, wherein the main beam 4 is of a box structure with a through inside, arch ribs 1 are arranged above two sides of the main beam 4, a transverse brace 5 is arranged between the arch ribs 1, arch feet 3 are connected to two ends of the arch ribs 1, the arch feet 3 are fixed to two ends of the main beam 4, suspenders 2 are connected between the arch ribs 1 and the main beam 4, and the suspenders 2 are vertically arranged and keep equal intervals between adjacent suspenders 2. The girder 4 is thickened to the horizontal outside and the girder bottom at the arch center 3 and is internally provided with a three-way prestress bundle 6 steel strand.

The arch rib 1 is integrally made of steel pipe concrete, the steel pipe concrete is a steel-concrete combined structure, and the steel pipe concrete has strong compression resistance and bending resistance by filling the concrete in the steel pipe and fully utilizing the expansion characteristic of the concrete to play a role in restraining the steel pipe, so that the concrete is in a three-way compression state. The steel pipe concrete arch rib 1 adopts a double-limb structure, the transverse braces 5 are respectively connected with the double-limb structures at two sides, and a K-shaped steel pipe concrete supporting structure is arranged between the two transverse braces 5 to improve the transverse rigidity and the stability of the arch rib 1.

The main beam 4 is a prestressed concrete box structure, and the horizontal thrust generated by the arch rib 1 at the arch springing 3 is counteracted by applying strong longitudinal prestress.

The boom 2 adopts parallel steel wire, and the concrete girder 4 deck slab passes through boom 2 to be connected with arch rib 1, transmits dead weight, water load, car load and crowd load that girder 4 bore to steel pipe concrete structure arch rib 1 to through exerting pretension for boom 2, thereby the atress of adjustment girder 4 improves girder 4's rigidity.

The longitudinal prestress is applied to the prestressed concrete box girder 4, and the space in the box is adjusted according to the water flow, so that the water flow requirement is met. The arch leg 3 where the girder 4 is connected with the arch rib 1 of the steel tube concrete structure adopts the measures of thickening the box-type girder 4 to the horizontal outside and thickening the girder bottom, and a three-way prestress beam 6 steel strand is arranged inside the arch leg, and the crack resistance and the shear resistance of the girder 4 at the arch leg 3 are improved by applying prestress.

The traffic lane is set up in the middle of the girder 4 upper surface decking, and both sides set up the pavement board, and the pavement board outside sets up the guardrail, satisfies the traffic demand of pedestrian and vehicle.

The embodiment provided by the utility model belongs to a lower riding arch bridge, the span of the main beam 4 can reach 50m-100m, the water flood discharging and traffic functions are realized, the advantages of strong bearing capacity and high rigidity are realized, and the bridge is particularly suitable for a large-span aqueduct crossing a railway.

It should be noted that, in the description of the present utility model, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

Claims (9)

1. Novel aqueduct superstructure, a serial communication port, including girder (4), girder (4) are inside box structure that link up, girder (4) both sides top is equipped with arch rib (1), be equipped with stull (5) between arch rib (1), arch rib (1) both ends are connected with arch bar (3), arch bar (3) are fixed in girder (4) both ends, arch rib (1) with be connected with jib (2) between girder (4), jib (2) are vertical to be set up and adjacent jib (2) keep equidistant.

2. A novel aqueduct superstructure according to claim 1, characterized in that the main beams (4) are thickened horizontally outwards and to the beam bottom at the feet (3).

3. A novel aqueduct superstructure according to claim 2, characterized in that the main beams (4) are internally provided with three-way prestressing tendons (6) at the feet (3).

4. The novel aqueduct superstructure according to claim 1, characterized in that the rib (1) is entirely of concrete-filled steel tube construction.

5. The novel aqueduct superstructure according to claim 4, wherein the arch rib (1) adopts a double limb structure.

6. The novel aqueduct superstructure according to claim 5, wherein the cross braces (5) are respectively connected with the double-limb structures of the arch ribs (1), and a K-shaped steel pipe concrete supporting structure is arranged between the two cross braces (5).

7. A novel aqueduct superstructure according to claim 1, characterized in that the boom (2) is a parallel wire rope.

8. A novel aqueduct superstructure according to claim 1, characterized in that the main beams (4) span 50-100 m.

9. The novel aqueduct superstructure according to claim 1, wherein the main beam (4) has a roadway in the middle of its upper surface, and sidewalk plates are installed on both sides, and guardrails are provided on the outer sides of the sidewalk plates.