Fabricated pedestrian overpass component
By adopting prefabricated H-shaped concrete components and a prestressed system, the problems of corrosion resistance and complex construction of steel structure pedestrian bridges have been solved, achieving efficient, economical, and aesthetically pleasing urban pedestrian bridge construction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN MUNICIPAL ENG CONSULTING CENT CO LTD
- Filing Date
- 2025-05-16
- Publication Date
- 2026-04-17
AI Technical Summary
Existing steel structure pedestrian bridges have poor corrosion resistance, complex manufacturing processes, complicated on-site construction, and are difficult to dismantle. Traditional concrete bridges take a long time to construct and are difficult to dismantle, which affects the efficiency of urban construction.
The bridge adopts prefabricated H-shaped concrete components, including precast main beams, bridge decks, and piers. Combined with a prestressed system and hinged joints, only hoisting and wet joint construction are required on site. Flowers can be planted on the bridge decks to enhance the landscape.
It improves construction efficiency, reduces construction and maintenance costs, enhances structural performance and landscape effects, and is in line with the concept of sustainable development.
Smart Images
Figure CN224133540U_ABST
Abstract
Description
Technical fields:
[0001] This utility model relates to a prefabricated pedestrian bridge component, which belongs to the field of bridge engineering technology, specifically to a pedestrian bridge that can be assembled and constructed. Background technology:
[0002] In urban transportation infrastructure construction, pedestrian overpasses are crucial facilities for ensuring pedestrian safety and alleviating traffic congestion. To minimize the impact of overpass construction on ground-level road traffic, steel structure pedestrian overpasses are currently widely used in urban construction due to their rapid construction and easy dismantling.
[0003] However, existing steel structure pedestrian bridges have many defects that cannot be ignored.
[0004] First, steel has poor corrosion resistance. In long-term outdoor environments, steel is prone to rust and corrosion, requiring frequent maintenance and anti-corrosion treatment, which consumes a lot of manpower, material resources and financial resources. The high maintenance cost is also inconsistent with the concept of sustainable urban development.
[0005] In addition, the manufacturing process of steel box girders is complex and requires high processing precision. The welding, painting and other processes in the manufacturing process are not only time-consuming, but also require a high level of technical skills from the workers. Any deviation in any link may affect the overall structural performance.
[0006] In the past, when concrete was used as the main building material for pedestrian overpasses, the construction method was generally on-site casting. While this method ensured the economic efficiency and durability of the overpasses, it had many drawbacks. On the one hand, on-site casting was a complex and cumbersome process, requiring a significant investment of manpower, resources, and time, and it also significantly occupied surrounding roads during construction, affecting traffic flow. On the other hand, if the overpass needed to be demolished due to adjustments in urban planning or other reasons, it also faced problems such as high demolition difficulty, long processing time, and high manpower and resource costs, causing considerable inconvenience to urban construction and management.
[0007] This invention is based on this background and aims to overcome the shortcomings of traditional steel structure pedestrian bridges and cast-in-place concrete bridges, and provide a high-efficiency, economical, durable and beautiful prefabricated pedestrian bridge component. Utility model content:
[0008] The purpose of this utility model is achieved as follows:
[0009] A prefabricated pedestrian bridge component includes a main beam, a bridge deck, piers, and stair beams. The main beam and bridge deck are both precast concrete components. The main beam consists of a pair of H-shaped concrete main beams, with corbels correspondingly installed on each beam. The bridge deck is a precast bridge panel supported between the two H-shaped concrete main beams by the corbels. A low baffle and a high support block extend from the top of the pier, and the top plane of the pier, the low baffle, and the high support block together form a main beam groove to accommodate the H-shaped concrete main beams. The H-shaped concrete main beams are placed within the main beam groove. Transverse diaphragms are spaced apart at the lower part of the H-shaped concrete main beams. A prestressed system is installed inside the H-shaped concrete main beams. The stair beams are supported on the piers by the high support blocks and connected to the H-shaped concrete main beams.
[0010] Both the H-shaped concrete main beam and the precast bridge deck are composed of multiple segments. Wet joints are provided between the segments of the H-shaped concrete main beam; hinged joints are provided between the segments of the precast bridge deck.
[0011] A flower trough is provided on the top of the H-shaped concrete main beam.
[0012] The flower trough is filled with concrete within the width of the stair beam.
[0013] The beneficial effects of this utility model are:
[0014] 1) High construction efficiency: This utility model adopts a prefabricated structure, and the main beam and bridge deck and other components are manufactured in the factory, and can even be made into standard parts. On-site, only hoisting and wet joint construction are required, which greatly shortens the construction cycle and reduces the impact on traffic.
[0015] 2) Excellent structural performance: The H-shaped concrete main beam, combined with longitudinal prestressing and transverse diaphragms, has strong vertical bearing capacity, good crack resistance and stability, and high transverse stiffness, which can withstand large loads, effectively cope with various working conditions during operation, and improve pedestrian comfort.
[0016] 3) Low construction and maintenance costs: Concrete has low construction costs, good corrosion resistance, and does not require frequent anti-corrosion maintenance like traditional steel structure pedestrian bridges, saving manpower, material resources, and financial resources, which is in line with the concept of sustainable development.
[0017] 4) Excellent landscape effect: The top of the H-shaped concrete main beam is equipped with flower troughs, which can be planted with flowers according to the season and the characteristics of the city, beautifying the urban environment, enhancing the city's image, and creating a pleasant travel space for citizens.
[0018] This invention can be applied to various roads where pedestrian overpasses need to be built. Attached image description:
[0019] Figure 1This is the elevation drawing of the pedestrian overpass of this utility model.
[0020] Figure 2 yes Figure 1 AA section diagram
[0021] Figure 3 yes Figure 2 BB cross section
[0022] Figure 4 yes Figure 1 CC cross-section
[0023] Figure 5 This is a plan view of the main beam of the pedestrian overpass of this utility model. Detailed implementation method:
[0024] The following is in conjunction with the appendix Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The present invention will be further described below:
[0025] To achieve the objectives of this utility model, the components include a main beam, bridge deck, piers, and staircase beams. The main beam and bridge deck are precast concrete components, which can be cast in a factory according to construction requirements to create standard parts. The piers are cast in-situ. If the bridge span is large, the H-shaped concrete main beam 1 and the precast bridge deck 9 can be composed of multiple segments. Wet joints 5 are provided between the segments of the H-shaped concrete main beam 1 to ensure reliable connection of the wet joints in the field.
[0026] like Figure 1 and Figure 2 As shown in the diagram, in this embodiment, the main beam is a pair of H-shaped concrete main beams 1. Corbels 2 for supporting the bridge deck are correspondingly installed on the pair of H-shaped concrete main beams 1. Therefore, the precast bridge deck 9 is supported between the two H-shaped concrete main beams 1 by the corbels 2. Transverse diaphragms 3 are spaced apart at the bottom of the H-shaped concrete main beams 1 to improve their lateral stiffness and stability. A prestressing system 4 is installed inside the H-shaped concrete main beams 1, which can improve the structure's crack resistance and durability, and save materials and reduce its weight. Furthermore, prestressing is applied to the wet joints 5 in the field through the prestressing system 4 to ensure the reliable connection of the wet joints 5. Figure 5 As shown in the image.
[0027] like Figure 3 As shown, hinge joints 11 are provided between the segments of the precast bridge deck 9, and the hinge joints 11 are used for in-situ hinge joint connection to improve the overall load-bearing performance. The precast bridge deck 9 is used to bear the bridge deck pavement 10 and pedestrian loads, and can be made of hollow structure to reduce the structural weight.
[0028] In this embodiment, as Figure 4 As shown, a low baffle 8 and a high support block 14 extend from the top of the pier 7. The top plane of the pier 7, the low baffle 8, and the high support block 14 together form a main beam groove to accommodate the H-shaped concrete main beam 1, which is placed in the main beam groove. The stair beam 13 is supported on the pier by the high support block 14 and is connected to the H-shaped concrete main beam 1. A flower trough 6 is provided on the top of the H-shaped concrete main beam 1 for planting greenery and enhancing the urban bridge landscape. To ensure the smooth connection between the main bridge and the stair beam elevation and to facilitate pedestrian passage, the flower trough 6 is filled with concrete material 12 within the width of the stair beam 13.
Claims
1. A prefabricated footbridge component comprising a main beam, a deck, a pier and a stairway beam, characterized in that The main beam and bridge deck are both precast concrete components; the main beam is a pair of H-shaped concrete main beams (1), and corbels (2) are correspondingly provided on the pair of H-shaped concrete main beams (1); the bridge deck is a precast bridge deck (9), and the precast bridge deck (9) is supported between the two H-shaped concrete main beams (1) by corbels (2); a low baffle (8) and a high support block (14) are extended on the top of the pier (7), and the top plane of the pier (7), the low baffle (8) and the high support block (14) together form the main beam groove for accommodating the H-shaped concrete main beam (1), and the H-shaped concrete main beam (1) is placed in the main beam groove; transverse diaphragms (3) are provided at intervals at the lower part of the H-shaped concrete main beam (1), and a prestressed system (4) is provided inside the H-shaped concrete main beam (1); the stair beam (13) is supported on the pier by the high support block (14) and connected to the H-shaped concrete main beam (1).
2. The assembled footbridge member as claimed in claim 1, wherein A flower trough (6) is provided on the top of the H-shaped concrete main beam (1).
3. The assembled footbridge member as claimed in claim 2, wherein The flower trough (6) is filled with concrete (12) within the width of the stair beam (13).
4. The assembled footbridge member as claimed in claim 1, wherein The H-shaped concrete main beam (1) and the precast bridge deck (9) are both multi-segment combinations. Wet joints (5) are provided between the segments of the H-shaped concrete main beam (1); hinge joints (11) are provided between the segments of the precast bridge deck (9).