An assembled platform plate structure for a single-column double-span subway station

Abstract

This application discloses a prefabricated platform slab structure for a single-column, double-span subway station, comprising a station base slab, prefabricated panels, and multiple prefabricated components spaced apart. The two ends of each prefabricated component are connected to the station base slab and the prefabricated panel, respectively. Each prefabricated component includes multiple central supports and side supports located on either side of the central supports, situated between the station base slab and the prefabricated panel. Both the central and side supports have multiple mounting parts, and the prefabricated panel has multiple mating parts. The mounting parts and mating parts mate to connect the prefabricated components to the prefabricated panel. Both the central and side supports have a "π" shaped structure. This application facilitates on-site assembly, reduces on-site construction procedures, shortens the construction cycle, and utilizes factory-prefabricated components with high strength, requiring only on-site assembly, thus addressing the current problem of a severe aging population and a shortage of young labor.

Description

Technical Field

[0001] This application relates to the field of subway construction engineering technology, specifically a prefabricated platform slab structure for single-column double-span subway stations. Background Technology

[0002] The internal structure of a subway station mainly includes the platform slab, stairs, and track-top ventilation ducts, and is typically constructed using cast-in-place concrete. Depending on the station's size, the structural forms are mainly divided into two types: single-column double-span and double-column triple-span. The platform width of a single-column station is generally 10 to 12 meters.

[0003] Subway platforms are the main load-bearing platforms for passengers to stand, get on and off trains, and walk. They bear the load of passengers and various forces generated by the train during operation. They also need to have functions such as safety, durability, and anti-slip properties, making them an important part of subway stations.

[0004] As my country's population ages, the number of young and middle-aged workers in the engineering field is gradually decreasing. Traditional subway station construction methods suffer from problems such as high labor intensity, low efficiency, insufficient green energy conservation, and lack of sustainable development.

[0005] Traditional cast-in-place platform slab construction typically can only begin after the station's roof is completed and the tunnel boring machine has penetrated the tunnel. This results in limited construction space and difficulties in material transportation. Due to the numerous construction procedures, the quality of concrete pouring is often unsatisfactory, formwork dismantling is difficult, and the construction period is long, affecting the overall construction progress.

[0006] Therefore, the structure of prefabricated platform panels in the existing technology has room for further improvement. Utility Model Content

[0007] In view of this, and addressing the technical problems of narrow construction space, difficult material transportation, numerous construction procedures, unsatisfactory concrete pouring quality, difficult formwork dismantling, and long construction period in existing cast-in-place platform slab construction, this application provides a prefabricated platform slab structure for single-column double-span subway stations. This structure enables rapid assembly and construction of subway station platform slabs, simplifies the traditional cast-in-place process of formwork installation (dismantling), rebar tying, and concrete pouring, while also reducing material input, accelerating construction efficiency, improving construction quality, shortening the construction period, and contributing to green environmental protection.

[0008] To achieve the above objectives, this application provides the following technical solution: a prefabricated platform slab structure for a single-column, double-span subway station, comprising: The station includes a base slab, precast panels, and multiple precast components spaced apart, with both ends of each precast component connected to the base slab and the precast panels, respectively. The precast component includes multiple central support members and side support members arranged on both sides of the central support members. The central support members and side support members are located between the station floor slab and the precast panel. The central support and the side support are each provided with multiple mounting parts, and the prefabricated panel is provided with multiple mating parts. The mounting parts and the mating parts cooperate to realize the connection between the prefabricated components and the prefabricated panel. The central support and side support are both π-shaped.

[0009] Compared to existing technologies, using prefabricated components and panels facilitates on-site assembly, reduces on-site construction procedures, and shortens the construction cycle. Furthermore, the factory-prefabricated components have high strength, requiring only assembly on-site, thus addressing the current problem of a shortage of young labor due to an aging population. Prefabrication also reduces material input, accelerates construction efficiency, improves construction quality, and shortens the construction period, contributing to environmental friendliness. Specifically, by designing the central and side support components as a "π"-shaped structure, the "π"-shaped column structure itself possesses excellent rigidity and load-bearing capacity. This ensures strength while reducing the amount of steel reinforcement and concrete used, lowering costs, and effectively resisting vertical and horizontal loads, thereby improving the stability and seismic performance of the subway station structure.

[0010] Preferably, the mounting part is a groove and the mating part is a rib. The mating of the groove and the rib enables the connection between the prefabricated component and the prefabricated panel.

[0011] In this embodiment, by setting the mounting part as a groove and the mating part as a rib, the rib can enhance the strength of the precast panel, improve the load-bearing capacity, ensure that the connection part is subjected to uniform force, avoid structural damage caused by stress concentration, and facilitate operation.

[0012] Preferably, the station floor is provided with at least two longitudinal beams, which are connected to the station floor by an inclined transition. The longitudinal beams are located between two adjacent central support members and are arranged parallel to the central support members. The longitudinal beam is provided with frame columns, which extend in a vertical direction away from the longitudinal beam.

[0013] In this embodiment, the frame columns can further enhance the stability of the longitudinal beams and also provide additional support points for the precast panels, which helps to distribute and transfer the load and improve the overall load-bearing capacity of the subway station structure.

[0014] Preferably, the prefabricated panel includes multiple edge blocks, multiple middle blocks, and multiple column edge blocks. The middle blocks are connected to the central support, the edge blocks are connected to the side support, and the edge blocks are connected to adjacent middle blocks. The column edge blocks are connected to the longitudinal beams, and two adjacent column edge blocks together wrap around the four corners of the longitudinal beams to form a covering structure, thereby achieving the connection between the longitudinal beams and the column edge blocks.

[0015] In this embodiment, two adjacent column edge blocks together wrap around the four corners of the longitudinal beam to form a covering structure, which enables the connection between the longitudinal beam and the column edge blocks, ensures accurate assembly, reduces errors, ensures a tight connection and overall stability between the longitudinal beam and the column edge blocks, and improves construction efficiency.

[0016] Preferably, each of the edge blocks, middle blocks, and column edge blocks has three ribs on its bottom surface. The sides of the two outermost ribs are flush with the sides of the precast component, and the width of the two side ribs is smaller than the width of the middle rib. The middle rib is provided with tapered anchoring holes.

[0017] In this embodiment, the tapered anchoring hole serves as a limiting device, which can restrict the movement of the edge block, middle block, and column edge block within the groove, ensuring that the edge block, middle block, and column edge block can be accurately connected to the prefabricated component, thus avoiding misalignment or movement during assembly.

[0018] Preferably, the side support member has a partition on the side away from the central support member.

[0019] In this embodiment, the partition serves as a fireproof barrier because various equipment pipelines are arranged under the station platform. The partition can effectively prevent the spread of flames and high-temperature gases, protecting the equipment pipelines from fire damage. At the same time, the partition can also provide sound insulation.

[0020] Preferably, a high-strength mortar leveling layer is provided between the precast panel and the longitudinal beam.

[0021] In this embodiment, Preferably, a first steel plate is embedded in the bottom of the precast component, and a second steel plate is embedded in the top surface of the station floor slab. The first steel plate and the second steel plate are welded together, and the size of the first steel plate is less than or equal to the size of the second steel plate.

[0022] In this embodiment, the first steel plate and the second steel plate have high load-bearing capacity and shear resistance, which can effectively transfer the load and ensure that the structure is subjected to uniform stress. The welded connection improves the connection strength and stability between the station base plate and the prefabricated components, and avoids relative movement between the two.

[0023] Preferably, the precast panel is provided with a cast-in-place concrete surface layer, and the concrete strength of the cast-in-place concrete surface layer is C30.

[0024] In this embodiment, after the prefabricated platform slab is installed, concrete is poured on the prefabricated panel on site, and then the joints are filled and leveled to form an integral platform surface. The cast-in-place concrete surface layer can enhance the overall stability of the subway station platform.

[0025] Preferably, the cast-in-place concrete surface layer is provided with a steel mesh.

[0026] In this embodiment, the steel mesh can effectively enhance the crack resistance and overall strength of the cast-in-place concrete surface layer. Attached Figure Description

[0027] Figure 1 A transverse sectional view of a prefabricated platform slab structure for a single-column double-span subway station provided in an embodiment of this application; Figure 2 A schematic diagram of the prefabricated platform slab structure for a single-column double-span subway station provided in an embodiment of this application; Figure 3 A longitudinal sectional view of a prefabricated platform slab structure for a single-column double-span subway station provided in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of a side support member provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of the central support member provided in one embodiment of this application; Figure 6 This is a schematic diagram of the structure of an intermediate block provided in an embodiment of this application; Figure 7 This is a schematic diagram of the structure of an edge block provided in an embodiment of this application; Figure 8 A schematic diagram of the structure of a column edge block provided in an embodiment of this application. Figure 1 ; Figure 9 A schematic diagram of the structure of a column edge block provided in an embodiment of this application. Figure 2 ; Figure 10 for Figure 1 A schematic diagram of the structure of B in the middle; Figure 11 for Figure 1 A schematic diagram of the structure of A in the middle; Figure 12 for Figure 1 A schematic diagram of the structure of C.

[0028] In the diagram: 1. Station floor slab; 2. Precast panel; 3. Precast component; 4. Longitudinal beam; 5. Frame column; 6. High-strength mortar leveling layer; 7. Cast-in-place concrete surface layer; 11. Second steel plate; 21. Rib beam; 22. Edge block; 23. Middle block; 24. Column edge block; 31. Central support; 32. Side support; 33. First steel plate; 71. Steel mesh; 211. Conical anchor hole; 241. First plate; 242. Second plate; 311. Groove; 312. Column; 313. Beam; 314. Plain concrete; 321. Partition. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solutions of this disclosure, the following detailed, clear, and complete description of this disclosure is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit it.

[0030] In the description of this application, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0031] Those skilled in the art should understand that in the disclosure of this application, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this application.

[0032] The present application will now be described in further detail with reference to the accompanying drawings, see below. Figures 1 to 12 illustrate.

[0033] This embodiment provides a prefabricated platform slab structure for a single-column, double-span subway station. Its application is in the field of subway construction engineering technology, specifically, as follows: Figures 1 to 12As shown, the system includes a station base slab 1, precast panels 2, and multiple precast components 3 spaced apart. Precast panels 2 are arranged longitudinally along the station, with each unit measuring 3 meters. The precast panels 2 are made of ultra-high performance concrete (UHPC). The two ends of each precast component 3 are connected to the station base slab 1 and the precast panels 2, respectively. The precast components 3 are vertically mounted on the station base slab 1. Both precast components 3 and precast panels 2 are manufactured in a factory, facilitating on-site assembly and reducing on-site construction steps. Formwork dismantling is simple, shortening the construction cycle. Furthermore, the factory-precast components have high strength and high-quality concrete pouring, requiring only assembly on-site. This addresses the current problem of a severe aging population and a shortage of young labor. Precast assembly also reduces material input, accelerates construction efficiency, improves construction quality, and shortens the construction period. It contributes to green environmental protection, aligns with the concept of sustainable development, reduces waste generated by traditional on-site construction, and facilitates dismantling and recycling. The precast component 3 includes multiple central support members 31 and side support members 32 disposed on both sides of the central support members 31. The central support members 31 and side support members 32 are located between the station floor slab 1 and the precast panel 2. The central support members 31 and side support members 32 are vertically arranged on the station floor slab 1. The central support members 31 and side support members 32 jointly support the precast panel 2, which can distribute the load and reduce local stress concentration. Both the central support members 31 and the side support members 32 are provided with multiple mounting parts, and the precast panel 2 is provided with multiple mating parts. The mounting parts and mating parts cooperate to realize the connection between the precast component 3 and the precast panel 2, thereby improving the firmness and stability of the connection.

[0034] Among them, such as Figures 3 to 5 As shown, both the central support member 31 and the side support member 32 are in the form of a "π" shape. Both the central support member 31 and the side support member 32 are composed of two columns 312 and one beam 313. The bottom of the column 312 is encased by plain concrete 314. The two columns 312 and the beam 313 are connected to form a "π" shape. The "π" shape column structure itself has good rigidity and load-bearing capacity. It can reduce the amount of steel bars and concrete used while ensuring its strength, reduce costs, and effectively resist vertical and horizontal loads, thereby improving the stability and seismic performance of the subway station structure.

[0035] Furthermore, such as Figures 3 to 5 As shown, the mounting part is a groove 311, and the mating part is a rib 21. The rib 21 protrudes towards the groove 311. The mating of the groove 311 and the rib 21 realizes the connection between the precast component 3 and the precast panel 2. The size of the groove 311 is adapted to the size of the rib 21. It can be manufactured according to specific design requirements to meet the assembly needs of different subway stations. The rib 21 can enhance the strength of the precast panel 2, improve the load-bearing capacity, ensure uniform stress at the connection part, avoid structural damage caused by stress concentration, and is easy to operate.

[0036] Furthermore, such as Figures 1 to 2 As shown, at least two longitudinal beams 4 are provided on the station floor slab 1. The longitudinal beams 4 are connected to the station floor slab 1 by a slope transition. The longitudinal beams 4 are located between two adjacent central support members 31 and are arranged parallel to the central support members 31. The longitudinal beams 4 can support the precast panels 2. Frame columns 5 are provided on the longitudinal beams 4. The frame columns 5 extend in a vertical direction away from the longitudinal beams 4. The frame columns 5 can further enhance the stability of the longitudinal beams 4 and also provide additional support points for the precast panels 2, which helps to distribute and transfer loads and improve the load-bearing capacity of the overall structure of the subway station.

[0037] Among them, such as Figures 6 to 9 As shown, the precast panel 2 includes multiple edge blocks 22, multiple middle blocks 23, and multiple column edge blocks 24. Both the edge blocks 22 and the middle blocks 23 are rectangular structures. The middle blocks 23 are connected to the central support 31, and the edge blocks 22 are connected to the side support 32. The edge blocks 22 are connected to the adjacent middle blocks 23. The column edge blocks 24 are connected to the longitudinal beam 4, and two adjacent column edge blocks 24 together wrap around the four corners of the longitudinal beam 4 to form a covering structure. This achieves the connection between the longitudinal beam 4 and the column edge blocks 24, ensuring accurate assembly, reducing errors, ensuring a tight connection and overall stability between the longitudinal beam 4 and the column edge blocks 24, and improving construction efficiency.

[0038] like Figure 8 , Figure 9 As shown, the column edge block 24 includes a first plate 241 and a second plate 242, which are fixedly connected. The widths of the first plate 241 and the second plate 242 are equal. The length of the first plate 241 is greater than the length of the second plate 242, or the length of the first plate 241 is less than the length of the second plate 242. The bottom of the first plate 241 is flush with the bottom of the second plate 242. By setting different lengths, the column edge block 24 can be flexibly adjusted and assembled according to the size of the longitudinal beam 4, ensuring the fit between the column edge block 24 and the longitudinal beam 4, thereby improving the stability of the overall structure.

[0039] Among them, such as Figures 6 to 9As shown, each edge block 22, middle block 23, and column edge block 24 has three ribs 21 on its bottom surface. The sides of the two outermost ribs 21 are flush with the sides of the precast component 3. The width of the two side ribs 21 is smaller than the width of the middle rib 21. When the lateral span of each edge block 22, middle block 23, and column edge block 24 is 2740mm, the longitudinal width is 1490mm, and the thickness is 60mm, the width of the middle rib 21 is 160mm, the width of the two side ribs 21 is 80mm, and the height of the rib 21 is 150mm. The middle rib 21 has a tapered anchoring hole 211. The tapered anchoring hole 211 acts as a limiting device, which can restrict the movement of the edge block 22, middle block 23, and column edge block 24 in the groove 311, ensuring that the edge block 22, middle block 23, and column edge block 24 can be accurately connected to the precast component 3, avoiding misalignment or movement during assembly.

[0040] like Figure 6 As shown, a partition 321 is provided on the side of the side support member 32 away from the middle support member 31. The partition 321 is 30mm thick and is made of fireproof material with good fire resistance. In other words, the partition 321 is provided on the side of the side support member 32 that is close to the subway running area. The partition 321 plays a role in fire isolation. Because various equipment pipelines are arranged under the station platform, the partition 321 can effectively prevent the spread of flames and high-temperature gases and protect the equipment pipelines from fire damage. At the same time, the partition 321 can also play a role in sound insulation.

[0041] Furthermore, such as Figure 10 As shown, a high-strength mortar leveling layer 6 is provided between the precast panel 2 and the longitudinal beam 4, that is, between the intermediate block 23 and the longitudinal beam 4. This high-strength mortar leveling layer 6 can effectively adjust the flatness between the precast panel 2 and the longitudinal beam 4, ensuring that the two are tightly bonded and avoiding stress concentration caused by unevenness, thereby improving the stability and durability of the entire platform slab structure. At the same time, the high-strength mortar leveling layer 6 also has good bonding properties, which can further enhance the connection strength between the precast panel 2 and the longitudinal beam 4.

[0042] Furthermore, such as Figure 11 As shown, a first steel plate 33 is embedded in the bottom of the precast component 3, and the first steel plate 33 is embedded in the bottom of the column 312. A second steel plate 11 is embedded in the top surface of the station base slab 1. The first steel plate 33 and the second steel plate 11 are welded together. The first steel plate 33 and the second steel plate 11 have high load-bearing capacity and shear resistance, which can effectively transfer loads and ensure uniform stress on the structure. The welded connection improves the connection firmness and stability between the station base slab 1 and the precast component 3, and avoids relative movement between the two. The size of the first steel plate 33 is less than or equal to the size of the second steel plate 11. The thickness of the first steel plate 33 is 16mm, and its size is 200X400mm. The thickness of the second steel plate 11 is 16mm, and its size is 140X340mm.

[0043] Furthermore, such as Figure 1 , Figure 12 As shown, the precast panel 2 is provided with a cast-in-place concrete surface layer 7. The concrete strength of the cast-in-place concrete surface layer 7 is C30, and the thickness of the cast-in-place concrete surface layer 7 is 50mm. This means that after the prefabricated platform slab is installed, concrete is poured on the precast panel 2 on site, and then the joints are filled and leveled to form an integral platform surface. The cast-in-place concrete surface layer 7 can enhance the overall stability of the subway station platform.

[0044] Among them, such as Figure 12 As shown, a steel mesh 71 is provided inside the cast-in-place concrete surface layer 7. The steel mesh 71 is made of steel bars with a diameter of 6mm and welded together. The mesh size is 2000mm×2000mm, which can effectively enhance the crack resistance and overall strength of the cast-in-place concrete surface layer 7.

[0045] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A fabricated platform slab structure for a single column double span metro station, characterized by, include: The station base plate (1), prefabricated panel (2) and multiple prefabricated components (3) spaced apart, wherein the two ends of the prefabricated components (3) are respectively connected to the station base plate (1) and the prefabricated panel (2); The precast component (3) includes multiple central support members (31) and side support members (32) arranged on both sides of the central support members (31). The central support members (31) and the side support members (32) are located between the station floor slab (1) and the precast panel (2). The central support member (31) and the side support member (32) are each provided with multiple mounting parts, and the prefabricated panel (2) is provided with multiple mating parts. The mounting parts and the mating parts cooperate to realize the connection between the prefabricated component (3) and the prefabricated panel (2). The central support member (31) and the side support member (32) are both in the form of a "π" shape.

2. The prefabricated platform slab structure for a single-column, double-span subway station according to claim 1, characterized in that, The mounting part is a groove (311), and the mating part is a rib (21). The mating of the groove (311) and the rib (21) realizes the connection between the prefabricated component (3) and the prefabricated panel (2).

3. The prefabricated platform slab structure for a single-column, double-span subway station according to claim 1 or 2, characterized in that, At least two longitudinal beams (4) are provided on the station floor slab (1). The longitudinal beams (4) are connected to the station floor slab (1) by a slope transition. The longitudinal beams (4) are located between two adjacent middle support members (31). The longitudinal beams (4) and the middle support members (31) are arranged in parallel. The longitudinal beam (4) is provided with a frame column (5), which extends in a vertical direction away from the longitudinal beam (4).

4. The prefabricated platform slab structure for a single-column, double-span subway station according to claim 3, characterized in that, The prefabricated panel (2) includes multiple side blocks (22), multiple middle blocks (23) and multiple column side blocks (24). The middle blocks (23) are connected to the central support (31), the side blocks (22) are connected to the side support (32), and the side blocks (22) are connected to the adjacent middle blocks (23). The column edge block (24) is connected to the longitudinal beam (4), and two adjacent column edge blocks (24) together wrap around the four corners of the longitudinal beam (4) to form a covering structure, so as to realize the connection between the longitudinal beam (4) and the column edge block (24).

5. The prefabricated platform slab structure for a single-column, double-span subway station according to claim 4, characterized in that, Each of the aforementioned edge blocks (22), middle blocks (23), and column edge blocks (24) has three ribs (21) on its bottom surface. The sides of the two outermost ribs (21) are flush with the sides of the precast component (3), and the width of the two side ribs (21) is smaller than the width of the middle rib (21). The middle rib (21) is provided with a tapered anchor hole (211).

6. The prefabricated platform slab structure for a single-column, double-span subway station according to claim 1, characterized in that, The side support (32) has a partition (321) on the side away from the middle support (31).

7. The prefabricated platform slab structure for a single-column, double-span subway station according to claim 3, characterized in that, A high-strength mortar leveling layer (6) is provided between the precast panel (2) and the longitudinal beam (4).

8. The prefabricated platform slab structure for a single-column, double-span subway station according to claim 1, characterized in that, The bottom of the precast component (3) is pre-embedded with a first steel plate (33), and the top surface of the station base plate (1) is pre-embedded with a second steel plate (11). The first steel plate (33) and the second steel plate (11) are welded together. The size of the first steel plate (33) is less than or equal to the size of the second steel plate (11).

9. The prefabricated platform slab structure for a single-column, double-span subway station according to claim 1, characterized in that, The precast panel (2) is provided with a cast-in-place concrete surface layer (7), and the concrete strength of the cast-in-place concrete surface layer (7) is C30.

10. The prefabricated platform slab structure for a single-column, double-span subway station according to claim 9, characterized in that, The cast-in-place concrete surface layer (7) is provided with a steel mesh (71).

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