A prefabricated assembled footbridge with hidden bent cap

Abstract

The utility model relates to a prefabricated assembled footbridge of hidden cap beam, include: prefabricated pi beam, hidden cap beam and stand, the prefabricated pi beam is constituted integral prefabricated component by both sides web and roof, the hidden cap beam is inboardly embedded in the web of prefabricated pi beam, the hidden cap beam is connected with the top of stand through the anti -seismic anchor bolt, the stand bottom is fixedly connected with the foundation, forms the assembled structure that cap beam hides completely in the inboard of pi beam web, compared with prior art, the utility model has prefabricated assembled footbridge, simple structure, facilitates the construction, the footbridge is connected through the anti -seismic anchor bolt with cap beam, improves the connecting strength, hides cap beam, and the footbridge vertical plane line type is light, and the landscape effect is good and the like.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, and in particular to a prefabricated pedestrian bridge with a concealed cap beam. Background Technology

[0002] Currently, most ordinary concrete pedestrian bridges are constructed using on-site formwork casting, which has the following problems:

[0003] The construction period is long: it requires on-site formwork erection, steel bar binding, concrete pouring, and waiting for curing, resulting in a long overall construction period.

[0004] Unstable construction quality: Affected by factors such as weather and workers' skill level, the quality of concrete pouring is difficult to guarantee, and defects such as cracks and honeycomb pitting are prone to occur.

[0005] Construction is constrained by the environment: Construction is difficult in narrow spaces or when crossing existing roads or rivers, and may affect traffic or the surrounding environment.

[0006] Prefabrication and assembly technology is being gradually applied in the construction of pedestrian bridges, but the following problems still exist:

[0007] Exposed cap beams affect aesthetics: The cap beams of traditional precast bridges are usually located on top of the columns. The exposed structure makes the bridge facade appear heavy and affects the landscape effect.

[0008] Insufficient seismic performance of connection nodes: Some prefabricated bridges use simple bolt connections or welding, which have poor seismic performance and are prone to node failure under earthquake action.

[0009] Low standardization: Different projects use different specifications of prefabricated components, making it difficult to form a universal and modular design, which affects construction efficiency.

[0010] Patent CN201720552759.X discloses a connection structure between a precast cap beam and a precast pier column. The precast pier column is a hollow pipe pile with an internal circular support plate and multiple reinforcing bars, which are then fixed with micro-expansion fine aggregate concrete. The lower end of each reinforcing bar is connected to the circular support plate, and the upper end is located above the upper end of the precast pier column. The precast cap beam has insertion holes corresponding to the reinforcing bars, allowing the reinforcing bars to be inserted into these holes during installation. High-strength mortar is then poured into these holes to securely connect the reinforcing bars to the holes. However, the structure is complex and the construction is complicated.

[0011] Patent CN202410435778.9 discloses a capless split connection structure between I-beam main beams, which connects the first span steel component with a second span steel component. The bottom of the junction pier is installed on the ground, and the top of the junction pier supports the first span steel component. The first span steel component includes: a first I-beam main beam segment, a steel box girder segment, and a lower corbel. The left end of the steel box girder segment is connected to the first I-beam main beam segment; the lower right end of the steel box girder segment is connected to the lower corbel. The second span steel component includes: a second I-beam main beam segment and an upper corbel. The upper corbel is located above the left end of the second I-beam main beam segment and above the lower corbel. A rubber bearing is provided between the upper and lower corbels. The top of the junction pier supports the steel box girder segment. This design eliminates the need for a cap beam at the split point, making the overall structure more streamlined and meeting the requirements of urban landscape pedestrian bridges and other bridges. However, it suffers from insufficient stiffness and unstable quality.

[0012] In summary, ordinary concrete pedestrian bridges generally require on-site formwork and pouring, making construction relatively complex. Assembled pedestrian bridges cannot conceal the cap beams, resulting in exposed cap beams on the side columns and a poor aesthetic appearance. Utility Model Content

[0013] The purpose of this utility model is to overcome the defects of the existing technology and provide a prefabricated pedestrian bridge with a concealed cap beam. The prefabricated pedestrian bridge has a simple structure and is easy to construct. The pedestrian bridge is bolted to the cap beam with seismic anchors to improve the connection strength. The concealed cap beam makes the pedestrian bridge facade light and elegant, with a good landscape effect.

[0014] The objective of this utility model can be achieved through the following technical solutions:

[0015] This utility model provides a prefabricated and assembled pedestrian bridge with a concealed cap beam, including: a prefabricated π-shaped beam, a concealed cap beam, and columns;

[0016] The precast π-shaped beam consists of two side webs and a top plate forming an integral precast component; the concealed cap beam is embedded inside the web of the precast π-shaped beam and is connected to the top of the column by seismic anchor bolts; the bottom of the column is fixedly connected to the foundation, forming an assembled structure in which the cap beam is completely hidden inside the web of the π-shaped beam.

[0017] Furthermore, the web of the precast π-shaped beam is provided with a cap beam embedding groove on the inner side, and the hidden cap beam forms an integral load-bearing structure with the cap beam embedding groove through cast-in-place concrete or high-strength grout.

[0018] Furthermore, the seismic anchor bolts are arranged at equal intervals along the length of the cap beam, with the lower end of the seismic anchor bolt pre-embedded in the top of the column and the upper end passing through the concealed cap beam and then fastened with a nut.

[0019] Furthermore, the prefabricated π-shaped beam adopts a cross-sectional form with constant or variable height.

[0020] Furthermore, the prefabricated π-shaped beam is made of reinforced concrete or steel structure.

[0021] Furthermore, the foundation is a pile foundation or a spread foundation.

[0022] Furthermore, shear keys are provided between the concealed cap beam and the web of the precast π-shaped beam.

[0023] Furthermore, the top surface of the prefabricated π-shaped beam is provided with anti-slip texture.

[0024] Furthermore, the column is a rectangular cross-section concrete column, and its height can be adjusted according to the clearance requirements under the bridge.

[0025] The construction method for prefabricated and assembled pedestrian bridges includes the following steps:

[0026] 1. Precast π-shaped beams with cap beam embedding grooves in the factory;

[0027] 2. On-site casting of columns and foundations;

[0028] 3. Hoist the precast π-shaped beam so that the cap beam's embedding groove is aligned with the top of the column;

[0029] 4. The connection between the concealed cap beam and the column is completed using seismic anchor bolts;

[0030] 5. Cast the connection material between the concealed cap beam and the precast π-shaped beam web.

[0031] Compared with the prior art, the present invention has the following advantages:

[0032] (1) Precast and assembled pedestrian bridges have a simple structure and are easy to construct. Factory prefabrication combined with on-site assembly means that key components such as the π-beams and cap beams are prefabricated in the factory, reducing on-site pouring work and shortening the construction period. Standardized π-beams and concealed cap beam structures facilitate mass production, reducing manufacturing costs and improving construction efficiency. In narrow spaces or when crossing roads or rivers, large-scale formwork is unnecessary, minimizing the impact on the surrounding environment.

[0033] (2) The pedestrian bridge is connected to the cap beam using seismic anchors, improving the connection strength. A dedicated seismic anchor system is used, with anchors evenly spaced along the length of the cap beam. The lower end is pre-embedded in the top of the column, and the upper end passes through the cap beam and is then tightened, far exceeding traditional bolted or welded connections. The cap beam and the π-shaped beam are integrated through embedded grooves and cast-in-place concrete / high-strength grout, increasing the joint strength and preventing localized damage during earthquakes.

[0034] (3) Concealed cap beams result in a light and airy pedestrian bridge facade with excellent landscape effects. This design solves the problem of exposed cap beams by completely embedding them into the inner side of the web of the precast π-shaped beam, creating continuous and smooth lines on the bridge facade. This completely eliminates the visual abruptness of exposed cap beams in traditional precast bridges, significantly improving the landscape effect. Suitable for urban pedestrian bridges, park landscape bridges, and other similar applications. Attached Figure Description

[0035] Figure 1 A front view of a prefabricated pedestrian bridge with a concealed cap beam;

[0036] Figure 2 A top view of a prefabricated pedestrian bridge with concealed cap beams;

[0037] Figure 3 This is a cross-sectional view of a prefabricated pedestrian bridge with a concealed cap beam.

[0038] Attached diagram labels: 1-Precast π-shaped beam; 2-Seismic anchor bolt; 3-Concealed cap beam; 4-Column. Detailed Implementation

[0039] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Component models, material names, connection structures, control methods, algorithms, and other features not explicitly described in this technical solution are considered common technical features disclosed in the prior art.

[0040] Example 1

[0041] This embodiment provides a prefabricated pedestrian bridge with a concealed cap beam, such as... Figure 1-3 As shown, it includes: a precast π-shaped beam 1, a concealed cap beam 2, and a column 4;

[0042] The precast π-shaped beam 1 is an integral precast component consisting of two side webs and a top plate; the hidden cap beam 2 is embedded inside the web of the precast π-shaped beam 1, and the hidden cap beam 2 is connected to the top of the column 4 through seismic anchor bolts 3; the bottom of the column 4 is fixedly connected to the foundation, forming an assembled structure in which the cap beam is completely hidden inside the web of the π-shaped beam.

[0043] In a specific embodiment, the inner side of the web of the precast π-shaped beam 1 is provided with a cap beam embedding groove, and the hidden cap beam 2 forms an integral load-bearing structure with the cap beam embedding groove through cast-in-place concrete or high-strength grout.

[0044] In a specific implementation, the seismic anchor bolts 4 are arranged at equal intervals along the length of the cap beam. The lower end of the seismic anchor bolt 4 is pre-embedded in the top of the column 3, and the upper end passes through the concealed cap beam 2 and is fastened with a nut.

[0045] In a specific implementation, the prefabricated π-shaped beam 1 adopts a cross-sectional form with equal or variable height.

[0046] In a specific embodiment, the prefabricated π-shaped beam 1 is made of reinforced concrete or steel structure.

[0047] In a specific implementation, the foundation is a pile foundation or a spread foundation.

[0048] In a specific embodiment, a shear key is provided between the hidden cap beam 2 and the web of the precast π-shaped beam 1.

[0049] In a specific embodiment, the top surface of the prefabricated π-shaped beam 1 is provided with anti-slip texture.

[0050] In a specific implementation, the column 3 is a rectangular concrete column, and its height can be adjusted according to the clearance requirements under the bridge.

[0051] The construction method for prefabricated and assembled pedestrian bridges includes the following steps:

[0052] 1. A prefabricated π-shaped beam with a cap beam embedding groove, manufactured in the factory;

[0053] 2. On-site pouring of column 3 and foundation;

[0054] 3. Hoist the precast π-shaped beam 1 so that the cap beam's embedding groove is aligned with the top of the column 3;

[0055] 4. The connection between the concealed cap beam 3 and the column 4 is completed by using the seismic anchor bolts 2;

[0056] 5. Cast the connection material between the hidden cap beam 3 and the web of the precast π-shaped beam 1.

[0057] Precast and assembled pedestrian bridges feature a simple structure and are easy to construct. Factory prefabrication combined with on-site assembly means that key components such as the π-beams and cap beams are prefabricated in the factory, reducing on-site pouring work and shortening the construction period. Standardized π-beams and concealed cap beam structures facilitate mass production, reducing manufacturing costs and improving construction efficiency. In narrow spaces or when crossing roads or rivers, large-scale formwork is unnecessary, minimizing the impact on the surrounding environment.

[0058] The pedestrian bridge is connected to the cap beam using seismic anchors, enhancing connection strength. A specialized seismic anchor system features anchors evenly spaced along the length of the cap beam, with the lower end pre-embedded in the top of the column and the upper end passing through the cap beam for secure fastening—far exceeding traditional bolt or welding methods. The cap beam and π-shaped beam are integrated through embedded grooves and cast-in-place concrete / high-strength grout, increasing joint strength and preventing localized damage during earthquakes.

[0059] Concealed cap beams result in a light and airy pedestrian bridge facade with excellent aesthetics. By completely embedding the cap beams within the web of the precast π-shaped beam, the bridge facade presents continuous and flowing lines, eliminating the visual abruptness of exposed cap beams found in traditional precast bridges and significantly enhancing the landscape. Suitable for urban pedestrian bridges, park landscape bridges, and other similar applications.

[0060] Components not described in detail in this embodiment are all existing components that can be purchased through public channels.

[0061] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A prefabricated pedestrian bridge with a concealed cap beam, characterized in that, include: Precast π-shaped beam (1), concealed cap beam (2) and column (4); The precast π-shaped beam (1) is an integral precast component consisting of two side webs and a top plate; the hidden cap beam (2) is embedded inside the web of the precast π-shaped beam (1), and the hidden cap beam (2) is connected to the top of the column (4) by seismic anchor bolts (3); the bottom of the column (4) is fixedly connected to the foundation, forming an assembled structure in which the cap beam is completely hidden inside the web of the π-shaped beam.

2. The prefabricated pedestrian bridge with a concealed cap beam according to claim 1, characterized in that, The precast π-shaped beam (1) has a cap beam embedding groove on the inner side of its web. The hidden cap beam (2) forms an integral load-bearing structure with the cap beam embedding groove through cast-in-place concrete or high-strength grout.

3. A prefabricated pedestrian bridge with a concealed cap beam according to claim 1, characterized in that, The seismic anchor bolts (4) are arranged at equal intervals along the length of the cap beam. The lower end of the seismic anchor bolt (4) is pre-embedded in the top of the column (3), and the upper end passes through the hidden cap beam (2) and is then tightened by a nut.

4. A prefabricated pedestrian bridge with a concealed cap beam according to claim 1, characterized in that, The prefabricated π-shaped beam (1) adopts a cross-sectional form with equal or variable height.

5. A prefabricated pedestrian bridge with a concealed cap beam according to claim 1, characterized in that, The precast π-shaped beam (1) is made of reinforced concrete.

6. A prefabricated pedestrian bridge with a concealed cap beam according to claim 1, characterized in that, The prefabricated π-shaped beam (1) is made of steel.

7. A prefabricated pedestrian bridge with a concealed cap beam according to claim 1, characterized in that, The foundation is a pile foundation or a spread foundation.

8. A prefabricated pedestrian bridge with a concealed cap beam according to claim 1, characterized in that, A shear key is provided between the concealed cap beam (2) and the web of the precast π-shaped beam (1).

9. A prefabricated pedestrian bridge with a concealed cap beam according to claim 1, characterized in that, The top plate surface of the prefabricated π-shaped beam (1) is provided with anti-slip texture.

10. A prefabricated pedestrian bridge with a concealed cap beam according to claim 1, characterized in that, The column (3) is a rectangular concrete column, and its height can be adjusted according to the clearance requirements under the bridge.

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