Bridge structure

Abstract

The utility model relates to the technical field of bridge engineering, and provides a bridge structure which comprises a main beam, two sets of skewbacks and arch ribs, the two sets of skewbacks are arranged at the bottoms of the two ends of the main beam respectively, and each skewback is provided with an inclined pile built-in foundation and a vertical drilling pile foundation; the pair of arch ribs is arranged on the two sides of the main beam, and the two ends of each arch rib are connected with the arch bases respectively; by adopting the skewback formed by combining the inclined pile built-in foundation and the vertical drilling pile foundation, the advantages of the inclined pile built-in foundation and the vertical drilling pile foundation can be brought into full play, the inclined pile built-in foundation can more effectively resist horizontal load and torque through inclined arrangement, the inclined pile built-in foundation can more effectively disperse the load into surrounding stratums, the bearing capacity of the foundation is improved, and the bearing capacity of the foundation is improved. The vertical drilling pile foundation can evenly transfer loads into the stratum through the pile bodies, settlement and deformation of the foundation are reduced, the safety and stability of a bridge are ensured, and the overall performance of the arch bridge is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering technology, and in particular to a bridge structure. Background Technology

[0002] In the field of bridge engineering technology, arch bridges transfer the loads they bear to the arch foundations, which then bear vertical and horizontal forces. Therefore, the rational design of the arch foundations plays a significant role in improving the safety, economy, and ease of construction of arch bridges. In particular, for long-span arch bridges, how to effectively improve the stability of the bridge has become a challenge in the design and construction of arch bridges. Utility Model Content

[0003] This invention provides a bridge structure to improve the stability of bridges.

[0004] This utility model provides a bridge structure, including:

[0005] Main beam;

[0006] The arch base is provided in two sets, and the two sets of arch bases are respectively located at the bottom of both ends of the main beam. The arch base is provided with inclined pile foundation and vertical bored pile foundation.

[0007] The arch ribs are provided in pairs, and the pair of arch ribs are provided on both sides of the main beam. The two ends of each arch rib are respectively connected to the arch seat, and multiple horizontal connectors are provided at intervals between the pair of arch ribs.

[0008] According to the bridge structure provided by this utility model, it also includes a first pier and a second pier. The first pier is located at the end of the main beam and is used to support the tunnel exit. Multiple support piles are provided at the bottom of the first pier. The second pier is located on the arch seat and is used to support the main beam.

[0009] According to the bridge structure provided by this utility model, the arch seat is further provided with a support, the support is connected to the end of the arch rib, and the top of the support is located at the intersection of the arch rib and the main beam.

[0010] According to the bridge structure provided by this utility model, each arch rib is provided with multiple hangers along the arc trajectory, and the bottom of the hangers is connected to the main beam.

[0011] According to the bridge structure provided by this utility model, the main beam includes a base frame and a bridge deck. The base frame has a grid structure and includes crossbeams and longitudinal beams connected to both ends of the crossbeams.

[0012] According to the bridge structure provided by this utility model, the bridge deck includes precast slabs and cast-in-place slabs.

[0013] According to the bridge structure provided by this utility model, anti-corrosion rubber strips are pasted at the connection between the edge of the precast slab and the crossbeam.

[0014] According to the bridge structure provided by this utility model, the inner cavity wall of the longitudinal beam is provided with reinforcing ribs around its perimeter.

[0015] According to the bridge structure provided by this utility model, a vehicle track is provided in the middle of the bridge deck, and cable troughs and guardrails are provided on both sides of the bridge deck.

[0016] According to the bridge structure provided by this utility model, the arch rib section adopts a four-limb truss structure, including a pair of upper chord tubes and a pair of lower chord tubes. The upper chord tubes are connected to each other, to each other, and to each upper chord tube and the lower chord tube by web members, and the upper chord tubes and the lower chord tubes are filled with concrete.

[0017] This utility model provides a bridge structure comprising: a main beam, arch abutments, and arch ribs. A pair of arch abutments are provided, each located at the bottom of one end of the main beam. Each arch abutment is supported by inclined pile foundations and vertical bored pile foundations. A pair of arch ribs are provided on both sides of the main beam, with each rib's ends connected to an arch abutment. Multiple horizontal connectors are spaced apart between the pair of arch ribs. By employing an arch abutment combining inclined pile foundations and vertical bored pile foundations, the advantages of each can be fully utilized. The inclined pile foundations, arranged at an angle, can more effectively resist water. Horizontal load and moment control improve the stability of the arch abutment, which is especially important for arch bridges with large spans and large horizontal loads. Inclined pile foundations can more effectively distribute the load to the surrounding strata, improving the bearing capacity of the foundation. At the same time, the friction and embedment force between the inclined piles and the strata also help to improve the uplift resistance of the foundation. Vertical bored pile foundations are suitable for various geological conditions and can provide reliable support. Vertical bored pile foundations can evenly transfer the load to the strata through the pile body, reducing the settlement and deformation of the foundation, ensuring the safety and stability of the bridge, and significantly improving the overall performance of the arch bridge. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a front view of a bridge structure provided in an embodiment of this utility model.

[0020] Figure 2 This is a cross-sectional view of the main beam provided in an embodiment of this utility model.

[0021] Figure 3 This is a cross-sectional view of the arch rib provided in an embodiment of this utility model.

[0022] Figure label:

[0023] 1. Main beam;

[0024] 2. Arch abutment; 21. Inclined pile foundation; 22. Vertical bored pile foundation; 23. Second pier; 24. Support;

[0025] 3. Arch rib; 31. Upper chord; 32. Lower chord;

[0026] 4. First pier; 41. Support pile; 5. Hanger; 6. Crossbeam; 7. Longitudinal beam; 71. Reinforcing bar; 8. Precast slab; 9. Railway track; 10. Cable trough; 11. Guardrail. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] The following is combined Figures 1-3 This invention describes a bridge structure.

[0029] This embodiment provides a bridge structure, such as Figures 1-3 As shown, it includes: main beam 1, arch seat 2 and arch rib 3.

[0030] The arch seat 2 is provided in two sets, which are respectively located at the bottom of the main beam 1. The arch seat 2 is provided with inclined pile foundation 21 and vertical drilled pile foundation 22. The arch rib 3 is provided in a pair, which are located on both sides of the main beam 1. The two ends of each arch rib 3 are connected to the arch seat 2, and multiple horizontal connectors are provided between the pair of arch ribs 3 at intervals. The two ends of the horizontal connectors are respectively connected to the inner side of the pair of arch ribs 3, thereby connecting the pair of arch ribs 3 together. For example, the horizontal connectors are steel pipes or steel rods. Along the arc trajectory of the arch rib 3, multiple horizontal connectors are provided at intervals from one end of the arch rib 3 to the other end to reliably connect the pair of arch ribs 3 together.

[0031] As can be seen from the above scheme, since the arch abutment 2 is equipped with inclined pile foundation 21 and vertical bored pile foundation 22, the inclined pile foundation 21, by being arranged at an angle, can more effectively resist horizontal loads and moments, improving the stability of the arch abutment 2. This is especially important for arch bridges with large spans and large horizontal loads. The inclined pile foundation 21 can more effectively distribute the load to the surrounding strata, improving the bearing capacity of the foundation. At the same time, the friction and embedding force between the inclined piles and the strata also help to improve the pull-out resistance of the foundation. The vertical bored pile foundation 22 is suitable for various strata conditions and can provide reliable support. The vertical bored pile foundation 22 can evenly transfer the load to the strata through the pile body, reducing the settlement and deformation of the foundation and ensuring the safety and stability of the bridge. By adopting the combination of inclined pile foundation 21 and vertical bored pile foundation 22, the advantages of each can be fully utilized to form a complementary effect. The inclined piles provide horizontal support and stability, while the vertical bored piles provide vertical bearing capacity and uniform settlement, significantly improving the overall performance of the arch bridge.

[0032] Reference Figure 1 Furthermore, it also includes a first pier 4 and a second pier 23. The first pier 4 is located at the end of the main beam 1 and is used to support the tunnel exit. Multiple support piles 41 are set at the bottom of the first pier 4. The second pier 23 is located on the arch seat 2 and is used to support the main beam 1.

[0033] With this configuration, the main beam 1 can be connected to the tunnel entrance via the first pier 4, and the reliability of the end support of the main beam 1 can be improved. The second pier 23 can be a portal pier. The space between the first pier 4 and the second pier 23 allows vehicles to pass through, enabling them to avoid the road, ensuring the support effect on the main beam 1, and connecting the main beam 1 to the tunnel.

[0034] Specifically, each set of arch seats 2 includes a first arch seat 2 and a second arch seat 2 symmetrically arranged. The first arch seat 2 and the second arch seat 2 are arranged along the width direction of the main beam 1 and connected by a concrete beam. Both the first arch seat 2 and the second arch seat 2 are provided with inclined pile foundations 21 and vertical bored pile foundations 22. The inclined pile foundations 21 are 15-25m long, and the vertical bored pile foundations 22 include multiple vertically arranged anchor cable protection piles. The anchor cable protection piles have rectangular or circular cross sections, are 20-45m long, and are spaced 6-11m apart.

[0035] like Figure 1 As shown, the arch seat 2 is also provided with a support 24, which is connected to the end of the arch rib 3, and the top of the support 24 is located at the intersection of the arch rib 3 and the main beam 1.

[0036] Furthermore, each arch rib 3 is equipped with multiple hangers 5 along its arc trajectory, with the bottom of each hanger 5 connected to the main beam 1. This arrangement optimizes the structural stress and improves the overall stiffness. As the number of hangers 5 increases, the axial force transmitted by a single hanger 5 under dead load will decrease, making the stress distribution between the arch rib 3 and the main beam 1 more uniform and gradually reducing the bending moment. Moreover, the hangers 5 increase the overall stiffness of the structure, thereby improving the bridge's load-bearing capacity.

[0037] In some embodiments, such as Figure 2 As shown, the main beam 1 includes a base frame and a bridge deck. The base frame has a grid structure, including crossbeams 6 and longitudinal beams 7 connecting the two ends of the crossbeams 6. The crossbeams 6 and longitudinal beams 7 can be of the same height. The bridge deck includes precast slabs 8 and cast-in-place slabs. The precast slabs 8 are laid in the middle of the base frame, and the two sides of the precast slabs 8 are filled with cast-in-place concrete. That is, the bridge deck is made using a precast slab 8 + cast-in-place layer process. Since the precast slabs 8 are manufactured in the factory, the manufacturing process of the precast slabs 8 can be better controlled in terms of quality, which can greatly shorten the on-site construction time, help speed up the project progress, and reduce construction costs. The cast-in-place slabs can be customized according to the specific conditions of the construction site, and the construction process is flexible. They can be adjusted and improved as needed. By combining with the precast slabs 8, they can better adapt to the requirements of bridge decks with complex shapes and structures, which helps to improve the overall stability and durability of the bridge.

[0038] Furthermore, anti-corrosion rubber strips are affixed to the edges of the precast slab 8 at the connection points with the crossbeams 6. This arrangement improves the sealing and durability of the connection. The anti-corrosion rubber strips fit tightly against the connection between the precast slab 8 and the crossbeams 6, effectively preventing moisture from seeping into the bridge's interior through the joint gaps, thus protecting the bridge structure from moisture erosion. Because rubber itself has good corrosion resistance, it can resist the erosion of various chemicals, thereby extending the bridge's service life. In addition, the rubber strips have a certain degree of elasticity, which can buffer the vibrations and impacts generated during bridge operation to a certain extent, improving the bridge's comfort and safety.

[0039] In some embodiments, reinforcing ribs 71 are provided around the inner cavity wall of the longitudinal beam 7 to improve the structural strength of the longitudinal beam 7.

[0040] In this embodiment, a vehicle track 9 is provided in the middle of the bridge deck, and cable troughs 10 and guardrails 11 are provided on both sides of the bridge deck.

[0041] Reference Figure 3 In this embodiment, the cross section of the arch rib 3 adopts a four-limb truss structure, including a pair of upper chord tubes 31 and a pair of lower chord tubes 32. The upper chord tubes 31 are connected to each other, and the upper chord tubes 31 and the lower chord tubes 32 are connected by web members. The upper chord tubes 31 and the lower chord tubes 32 are filled with concrete, which can be self-compacting shrinkage-compensating C55 concrete.

[0042] This design allows the four-limb truss structure to effectively distribute and transfer loads, making the entire arch rib 3 structure more uniformly stressed and improving its load-bearing capacity. Furthermore, the truss structure has good stability, resisting various external forces and deformations, ensuring the safety and durability of the bridge. In addition, since the four-limb truss structure uses hollow steel pipes as chords, it is lightweight, easy to transport and install, reducing construction difficulty and cost. By filling the chords with concrete, the structural strength and stability of the arch rib 3 are improved, which is beneficial to improving the structural reliability of the bridge.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A bridge structure, characterized in that, include: Main beam (1); The arch seat (2) is provided in two sets. The two sets of arch seats (2) are respectively located at the bottom of the main beam (1). The arch seat (2) is provided with inclined pile foundation (21) and vertical drilled pile foundation (22). The arch ribs (3) are provided in pairs. The pair of arch ribs (3) are provided on both sides of the main beam (1). The two ends of each arch rib (3) are connected to the arch seat (2) respectively, and multiple horizontal connecting pieces are provided between the pair of arch ribs (3).

2. The bridge structure according to claim 1, characterized in that, It also includes a first pier (4) and a second pier (23). The first pier (4) is located at the end of the main beam (1) and is used to support the tunnel exit. Multiple support piles (41) are provided at the bottom of the first pier (4). The second pier (23) is located on the arch seat (2) and is used to support the main beam (1).

3. The bridge structure according to claim 1, characterized in that, The arch seat (2) is also provided with a support (24), which is connected to the end of the arch rib (3), and the top of the support (24) is located at the intersection of the arch rib (3) and the main beam (1).

4. The bridge structure according to claim 1, characterized in that, Each of the arch ribs (3) is provided with multiple hangers (5) along an arc trajectory, and the bottom of the hangers (5) is connected to the main beam (1).

5. The bridge structure according to claim 1, characterized in that, The main beam (1) includes a base frame and a bridge deck. The base frame has a grid structure and includes a crossbeam (6) and longitudinal beams (7) connecting the two ends of the crossbeam (6).

6. The bridge structure according to claim 5, characterized in that, The bridge deck includes precast slabs (8) and cast-in-place slabs.

7. The bridge structure according to claim 6, characterized in that, Anti-corrosion rubber strips are pasted at the connection between the edge of the precast slab (8) and the crossbeam (6).

8. The bridge structure according to claim 5, characterized in that, The inner wall of the longitudinal beam (7) is provided with reinforcing ribs (71).

9. The bridge structure according to claim 5, characterized in that, A vehicle track (9) is provided in the middle of the bridge deck, and cable troughs (10) and guardrails (11) are provided on both sides of the bridge deck.

10. The bridge structure according to claim 1, characterized in that, The cross section of the arch rib (3) adopts a four-limb truss structure, including a pair of upper chord tubes (31) and a pair of lower chord tubes (32). The upper chord tubes (31) are connected to each other, and the upper chord tubes (31) and the lower chord tubes (32) are connected by web members. The upper chord tubes (31) and the lower chord tubes (32) are filled with concrete.

Images