Through oblique-span arch bridge with suspender anchoring system

Abstract

The utility model relates to a through oblique-span arch bridge with a suspender anchoring system. The through oblique-span arch bridge comprises an arch rib, a suspender, a main beam, an anchoring system, an arch seat and a bridge abutment, the two ends of the main beam are supported on the bridge abutment, and anchoring systems are fixedly installed on the two sides of the main beam. The skewbacks are respectively arranged in the riverway on the two sides of the main beam and are respectively a first skewback and a second skewback, and an arch rib obliquely spanning the main beam is fixedly connected between the first skewback and the second skewback; the arch rib is connected with the anchoring systems on the two sides of the main beam through suspenders respectively, the suspenders are symmetrically arranged along the center line of the main beam, and the top ends of the suspenders are anchored to the center vertex of the arch rib in a concentrated mode. Compared with the prior art, the main beam is obliquely crossed with the arch plane, the span of the arch rib is not limited by the length of the main beam, and the suspenders are symmetrically arranged and are intensively anchored on the arch crown, so that suspender forces outside the arch plane are mutually balanced, and rich spatial dimensions and a better landscape effect are integrally shown.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge structures, and in particular relates to a bottom-supported oblique-span arch bridge with a hanger anchoring system. Background Art

[0002] Bottom-through arch bridges are widely used in urban landscape bridges due to their beautiful appearance, large spans, and strong load-bearing capacity, and are increasingly being used as urban landmarks. Bottom-through arch bridges mainly consist of arch ribs, hangers, and bridge deck systems. Arch ribs, as the main load-bearing components of bottom-through arch bridges, bear the dead load of the bridge deck system and the live load of vehicles, and bear the main load of the entire bridge structure. The design of the arch ribs is also an important part of the bridge's aesthetics. The arch ribs of traditional bottom-through arch bridges are usually arranged vertically or tilted inward (outward), while the hangers are usually arranged within the arch plane, usually vertically parallel or in a grid structure, and anchored to the main beam. This occupies the width of the bridge deck, thereby compressing the passage space. The main beam is usually arranged parallel to the arch plane, and its length is the arch rib span, which is not structurally efficient. For arch bridges with thrust systems, the horizontal thrust at the arch foot is controlled by the rise-to-span ratio. As the span increases, the arch ribs need to be taller to maintain structural balance. While a thrust-free system can reduce the rise-to-span ratio, the stiffness of the arch ribs decreases, requiring larger arch rib and main beam cross-sections to meet structural strength requirements. Therefore, the span of the arch ribs is a key constraint affecting structural scale, efficiency, economy, and aesthetics. In traditional designs, these factors often limit the spanning capacity of bridges, increasing construction costs and maintenance difficulties. Utility Model Content

[0003] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide a bottom-supported oblique span arch bridge with a hanger anchoring system, so as to make the bridge more beautiful in shape and lighter in structure.

[0004] The purpose of the utility model can be achieved through the following technical solutions:

[0005] The utility model provides a bottom-through oblique span arch bridge with a hanger anchoring system, comprising arch ribs, hangers, main beams, an anchoring system, arch seats and abutments;

[0006] Both ends of the main beam are supported on the abutments, and anchoring systems are fixedly installed on both sides of the main beam;

[0007] The abutments are arranged in the river channels on both sides of the main beam, namely the first abutment and the second abutment, and an arch rib obliquely spanning the main beam is fixedly connected between the first abutment and the second abutment;

[0008] The arch ribs are respectively connected to the anchoring systems on both sides of the main beam through hangers. The hangers are symmetrically arranged along the center line of the main beam and the top ends of the hangers are centrally anchored on the central vertex of the arch ribs.

[0009] Furthermore, the anchoring system consists of a longitudinal anchoring steel pipe and an anchoring beam. The longitudinal anchoring steel pipe extends longitudinally along the main beam, and the anchoring beam is arranged at a set angle relative to the center line of the main beam. The anchoring beams are connected by the longitudinal anchoring steel pipe to balance the longitudinal component of the boom.

[0010] Preferably, the angle between the anchor beam and the center line of the main beam is 90°.

[0011] Furthermore, the bottom end of the boom is anchored to the anchor beams on both sides of the main beam.

[0012] Preferably, both ends of the hanger are hinged to the arch rib and the anchoring beam respectively.

[0013] Preferably, the suspension rod is made of parallel steel wires or steel strands.

[0014] Preferably, the spacing between the hangers along the longitudinal direction of the bridge is 4 to 6 meters.

[0015] Preferably, the arch rib is a steel structure, a concrete structure or a steel-concrete composite structure.

[0016] Preferably, the angle between the plane axis of the arch rib and the center line of the main beam is 40 to 90 degrees.

[0017] Preferably, the arch rib is a semicircular arc structure, and the rise-to-span ratio of the arch rib is 1:2.5-6.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] (1) The main beam of the bottom-supported oblique-span arch bridge provided by the present invention is obliquely intersected with the arch plane, and the arch rib span is not restricted by the main beam length. As the arch rib span decreases, the span-rise ratio increases, which can greatly reduce the horizontal thrust of the arch seat and the foundation scale. In addition, the main beam and arch ribs can be arranged according to local conditions to give full play to the respective advantages of the beam structure and the arch.

[0020] (2) The hangers of the bottom-supported oblique-span arch bridge provided by the present invention are symmetrically arranged and the top ends of the hangers are centrally anchored to the arch crown, so that the hanger forces outside the arch plane are balanced with each other, reducing the out-of-plane effects of the arch and improving the stress on the arch; the bottom ends of the hangers are anchored to the crossbeams outside the main beams, which do not occupy the width of the bridge deck and do not compress the passage space; the crossbeams are connected by longitudinal steel pipes to balance the longitudinal components of the hangers, thereby improving the stress on the crossbeams.

[0021] (3) The utility model has a scientific and reasonable structure, is safe and convenient to use, has a simple structure and comprehensive functions, and the arch ribs span the main bridge with beautiful cross-sections and lines. The anchored longitudinal and transverse beams are both load-bearing components and landscape shaping components, which can make the overall shape of the bridge more varied and beautiful, and can serve as a landmark building in the city. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional structural diagram of the bottom-supported oblique-span arch bridge provided by the utility model;

[0023] Figure 2 The diagram is a top view of the through-type oblique span arch bridge provided by the utility model.

[0024] Description of the marks in the figure:

[0025] 110-arch rib, 120-suspender, 130-main beam, 140-longitudinal anchor steel pipe, 150-anchor cross beam, 160-first arch seat, 161-second arch seat, 170-abutment. DETAILED DESCRIPTION

[0026] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0029] In the following implementation manners or examples, unless otherwise specified, functional components or structures are conventional components or conventional structures used in the art to achieve corresponding functions.

[0030] Example 1

[0031] See Figure 1 and Figure 2 The utility model provides a bottom-through skew-span arch bridge with a hanger anchoring system, comprising an arch rib 110, a hanger 120, a main beam 130, an anchoring system, an arch seat and an abutment 170;

[0032] Both ends of the main beam 130 are supported on the abutment 170 , and anchoring systems are fixedly installed on both sides of the main beam 130 ;

[0033] The abutments are arranged in the river channel on both sides of the main beam 130, and are respectively a first abutment 160 and a second abutment 161. An arch rib 110 obliquely spanning the main beam 130 is fixedly connected between the first abutment 160 and the second abutment 161.

[0034] The arch ribs 110 are respectively connected to the anchoring systems on both sides of the main beam 130 through the hangers 120. The hangers 120 are symmetrically arranged along the center line of the main beam 130 and the top ends of the hangers 120 are centrally anchored on the central vertex of the arch rib 110.

[0035] The anchoring system consists of a longitudinal anchoring steel pipe 140 and an anchoring beam 150. The longitudinal anchoring steel pipe 140 extends longitudinally along the main beam 130. The anchoring beam 150 is arranged at a set angle relative to the main beam 130. The anchoring beams 150 are connected by the longitudinal anchoring steel pipe 140 to balance the longitudinal component of the boom 120.

[0036] The bottom end of the suspension rod 120 is anchored to the anchor beams 150 on both sides of the main beam 130 .

[0037] In this embodiment, the angle between the anchor beam 150 and the main beam 130 is 90°.

[0038] In this embodiment, both ends of the hanger 120 are hinged to the arch rib 110 and the anchor beam 150 respectively. The hanger 120 uses parallel steel wires, and the hanger 120 is spaced 5 meters apart along the longitudinal direction of the bridge.

[0039] In this embodiment, the arch rib 110 is a steel-concrete composite structure. The included angle between the plane axis of the arch rib 110 and the center line of the main beam 130 is 60°. The arch rib 110 is a semicircular arc structure, and the rise-to-span ratio of the arch rib 110 is 1:4.

[0040] During construction, the main beam 130 and the abutment 170 are constructed first, and then the arch seat is cast according to the set angle between the plane axis of the arch rib 110 and the center line of the main beam 130. Then, the arch rib 110 that spans the main beam 130 is erected. The arch rib span is smaller than the main beam length. The reduction in the arch rib span leads to an increase in the rise-span ratio, which greatly reduces the horizontal thrust of the arch seat. The top of the hanger 120 is centrally anchored on the central vertex of the arch rib 110, and the bottom end of the hanger 120 is anchored on the anchor beam 150 outside the main beam 130. The hangers 120 are arranged symmetrically so that the hanger forces outside the arch plane are balanced with each other, reducing the out-of-plane effect of the arch and improving the stress on the arch. The anchor beams 150 are connected by longitudinal anchor steel pipes 140, which can balance the longitudinal component of the hanger 120. Finally, the bottom-supported oblique span arch bridge and its hanger anchoring system are painted as a whole, and the bridge deck ancillary facilities are constructed.

[0041] The above description of the embodiments is intended to facilitate understanding and use of the utility model by those skilled in the art. Those skilled in the art will readily be able to make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the utility model is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of this utility model without departing from the scope of this utility model should be within the scope of protection of this utility model.

Claims

1. A through-type skew-span arch bridge with a hanger anchor system, characterized in that: The invention comprises an arch rib (110), a hanger (120), a main beam (130), an anchoring system, an arch seat and an abutment (170); Both ends of the main beam (130) are supported on the abutment (170), and anchoring systems are fixedly installed on both sides of the main beam (130); The abutments are arranged in the river channel on both sides of the main beam (130), and are respectively a first abutment (160) and a second abutment (161), and an arch rib (110) obliquely spanning the main beam (130) is fixedly connected between the first abutment (160) and the second abutment (161); The arch ribs (110) are respectively connected to the anchoring systems on both sides of the main beam (130) through hangers (120). The hangers (120) are symmetrically arranged along the center line of the main beam (130), and the top ends of the hangers (120) are centrally anchored on the central vertex of the arch ribs (110).

2. A through-type skew-span arch bridge with a hanger anchor system according to claim 1, characterized in that: The anchoring system consists of a longitudinal anchoring steel pipe (140) and an anchoring crossbeam (150), wherein the longitudinal anchoring steel pipe (140) extends longitudinally along the main beam (130), and the anchoring crossbeam (150) is arranged at a set angle relative to the main beam (130). The anchoring crossbeams (150) are connected by the longitudinal anchoring steel pipe (140) to balance the longitudinal component of the boom (120).

3. The through-type skew-span arch bridge with a hanger anchor system according to claim 2, characterized in that: The angle between the anchoring beam (150) and the main beam (130) is 90°.

4. The through-type skew arch bridge with a hanger anchor system according to claim 2, characterized in that: The bottom end of the suspension rod (120) is anchored on the anchoring beams (150) on both sides of the main beam (130).

5. The through-type skew-span arch bridge with a hanger anchoring system according to claim 1, characterized in that: Both ends of the suspension rod (120) are hinged to the arch rib (110) and the anchoring beam (150) respectively.

6. The through-type skew-span arch bridge with a hanger anchor system according to claim 1, characterized in that: The suspension rod (120) is made of parallel steel wires or steel strands.

7. The through-type skew-span arch bridge with a hanger anchor system according to claim 1, characterized in that: The spacing between the suspension rods (120) along the longitudinal direction of the bridge is 4 to 6 meters.

8. The through-type skew-span arch bridge with a hanger anchor system according to claim 1, characterized in that: The arch rib (110) is a steel structure, a concrete structure or a steel-concrete combined structure.

9. The through-type skew-span arch bridge with a hanger anchor system according to claim 1, characterized in that: The included angle between the plane axis of the arch rib (110) and the center line of the main beam (130) is 40 to 90 degrees.

10. The through-type skew-span arch bridge with a hanger anchoring system according to claim 1, characterized in that: The arch rib (110) is a semicircular arc structure, and the rise-to-span ratio of the arch rib (110) is 1:2.5-6.

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