Fabricated underground anti-seismic structure of subway station

Abstract

The invention discloses a fabricated subway station underground anti-seismic structure, which relates to the technical field of subway station underground anti-seismic, comprises a first frame and a second frame, and is characterized in that one side of the first frame is fixedly connected with a first bottom plate, and the bottom of the second frame is fixedly connected with a second bottom plate; a lower supporting plate is fixedly connected to the upper surface of the first bottom plate, an upper connecting block is fixedly connected to the position, close to the top, of the outer wall of one side of the lower supporting plate, two side connecting blocks are fixedly connected to one side of the lower supporting plate, and a plurality of friction protrusions are arranged on the outer wall of the first frame and the outer wall of the second frame. The top of the lower supporting plate is provided with a pressure bearing mechanism, the pressure bearing mechanism is used for dispersing top pressure, and the edges of the two sides of the top of the lower supporting plate are provided with connecting mechanisms. According to the fabricated underground anti-seismic structure of the subway station, the sliding buffering mechanism is designed, so that rails cannot be broken, the internal space is kept smooth, and the connecting mechanism is designed to ensure that a tunnel is always communicated.

Description

Technical Field

[0001] The invention relates to the technical field of underground earthquake resistance of subway stations, and in particular to an assembled underground earthquake resistance structure of a subway station. Background Art

[0002] Prefabricated buildings are characterized by high production efficiency, precise components, standardization, and green environmental protection, and are the future development trend of the construction industry. Prefabricated subway stations are a new type of prefabricated building, which means that the station components are centrally produced in the prefabrication plant, and then the prefabricated components are assembled one by one in sequence at the construction site like "building blocks". Compared with traditional cast-in-place subway stations, prefabricated subway stations minimize the impact of subway construction on the surrounding environment. Prefabricated subway stations have improved quality and efficiency, promoted the green and low-carbon transformation of the construction industry, and are in line with the concept of low-carbon travel.

[0003] Frame structures are mostly used in multi-story and high-rise civil buildings and multi-story industrial buildings. They have flexible floor plans and are easy to arrange larger rooms. However, pure frame structures have low lateral stiffness and are flexible structures. Therefore, when ordinary subway station structures are impacted by earthquakes, transverse waves cause serious deformation or even fracture of the rails, and longitudinal waves cause tunnels to collapse and block. Therefore, they lack the function of protecting rails and tunnels and cannot meet actual needs. Summary of the invention

[0004] The present invention discloses an assembled underground seismic resistant structure for a subway station, aiming to solve the technical problem that when a general subway station structure is impacted by an earthquake, transverse waves cause serious deformation or even fracture of rails, and longitudinal waves cause collapse and blockage of tunnels, thus lacking the ability to ensure the functions of rails and tunnels.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An assembled underground seismic resistant structure of a subway station comprises a first frame and a second frame, wherein a first bottom plate is fixedly connected to one side of the first frame, a second bottom plate is fixedly connected to the bottom of the second frame, and a lower support plate is fixedly connected to the upper surface of the first bottom plate;

[0007] A pressure-bearing mechanism is installed on the top of the lower support plate, and the pressure-bearing mechanism is used to disperse the top pressure;

[0008] Connecting mechanisms are installed at the top and side edges of the lower support plate, and are used to isolate the space inside and outside the tunnel;

[0009] Friction damping mechanisms are installed on both sides of the lower support plate, and the friction damping mechanisms are used to provide friction;

[0010] The upper surfaces of the second bottom plate and the first bottom plate are provided with sliding buffer mechanisms, which are used to ensure the connection of the rails;

[0011] The second base plate and the first base plate are respectively installed with sliding connection mechanisms on both sides, and the sliding connection mechanisms are used to maintain the connection between the second base plate and the first base plate. The sliding connection mechanisms include first connecting rails respectively fixedly connected to both sides of the first base plate, and second connecting rails respectively fixedly connected to both sides of the second base plate. A first sliding block is slidably connected to one side of the first connecting rail, and a second sliding block is slidably connected to one side of the second connecting rail, and a movable connection mechanism is installed between the first sliding block and the second sliding block.

[0012] It is installed at the subway entrance and exit of the subway station through the first frame. The first frame and the second frame play the role of frame support. The lower support plate plays the role of isolating the space inside and outside the tunnel. The external space of the lower support plate is filled with various materials. A certain space is left between the second bottom plate and the first bottom plate, which is filled with building materials.

[0013] In a preferred embodiment, the pressure-bearing mechanism includes a middle support plate fixedly connected to the top of the lower support plate, the top of the middle support plate is fixedly connected to an upper support plate, one side outer wall of the lower support plate is fixedly connected to an upper connecting block near the top, one side of the lower support plate is fixedly connected to two side connecting blocks, and multiple friction protrusions are arranged on the outer walls of the first frame and the second frame.

[0014] When an earthquake occurs, the pressure on the top of the lower support plate increases dramatically, and the top pressure squeezes the upper support plate. Due to the arc design, the upper support plate is in uniform contact with the middle support plate. The upper support plate and the middle support plate transmit the pressure evenly, and the lower support plate is subjected to uniform pressure, making the structure of the lower support plate more pressure-resistant.

[0015] In a preferred solution, the connecting mechanism includes an inner baffle bar arranged at the edge positions on both sides of the lower support plate, one side of the inner baffle bar is slidably connected to an elastic pad, one side of the elastic pad is slidably connected to an outer baffle bar, the top of the outer baffle bar is fixedly connected to a connecting plate, and the outer baffle bar is symmetrically designed.

[0016] The connecting plate is used to isolate the space inside and outside the tunnel. The external space of the connecting plate is filled with various materials. There are connecting plates between adjacent lower support plates. The function of the connecting plate is to isolate the space inside and outside the lower support plate. During an earthquake, the positions of the second bottom plate and the first bottom plate are misaligned, and the outer and inner baffles squeeze the elastic pad. Since the material of the elastic pad is elastic, it can buffer the squeezing of the outer and inner baffles, so that the structure remains stable and does not deform.

[0017] In a preferred embodiment, the friction damping mechanism includes a first friction plate fixedly connected to both sides of the lower support plate, a second friction plate fixedly connected to both sides of the middle support plate near the bottom, and a third friction plate fixedly connected to both sides of the upper support plate near the bottom, a plurality of first friction holes are provided on the surface of the first friction plate, a plurality of second friction holes are provided on the surface of the second friction plate, and a plurality of third friction holes are provided on the surface of the third friction plate.

[0018] When the earthquake shear wave impacts, since the first friction plate, the second friction plate and the third friction plate are buried in the building materials, there is huge friction between them and the building materials, making the upper support plate, the middle support plate and the lower support plate more stable.

[0019] In a preferred embodiment, the sliding buffer mechanism includes two stable slide rails respectively fixedly connected to the upper surfaces of the second base plate and the first base plate, the interior of the stable slide rails is slidably connected with a slide plate, the upper surface of the slide plate is fixedly connected with a sliding plate, the upper surface of the sliding plate is fixedly connected with a buffer sleeper rail, and the upper surface of the buffer sleeper rail is fixedly connected with rails near both ends.

[0020] The shear waves of the earthquake cause the rails to twist, and the slide plates at the twisted positions slide, reducing the local deformation of the rails and preventing them from breaking. The buffer sleepers can reduce the impact of the longitudinal waves of the earthquake.

[0021] In a preferred embodiment, the movable connection mechanism includes a first rotating block rotatably connected to one side of the first sliding block, one side of the first rotating block is rotatably connected to a first connecting plate, one side of the second sliding block is rotatably connected to a second rotating block, one side of the second rotating block is rotatably connected to a second connecting plate, the second connecting plate and the first connecting plate are also rotatably connected, and the top of the first connecting plate is fixedly connected to a shielding shell.

[0022] By misaligning the positions of the second bottom plate and the first bottom plate during an earthquake, the connection between the second bottom plate and the first bottom plate is ensured, the rails will not break, the internal space remains unobstructed, the first connecting plate and the second connecting plate slide relative to each other, the first connecting plate and the first rotating block slide relative to each other, and the second connecting plate and the second rotating block slide relative to each other.

[0023] As can be seen from the above, the assembled underground seismic resistant structure of a subway station provided by the present invention has the following technical effects.

[0024] First, during an earthquake, the second bottom plate and the first bottom plate are misaligned, which ensures the connection between the second bottom plate and the first bottom plate, prevents the rails from breaking, keeps the internal space unobstructed, and the first connecting plate and the second connecting plate slide relative to each other, the first connecting plate and the first rotating block slide relative to each other, and the second connecting plate and the second rotating block slide relative to each other, ensuring that the tunnel is always connected.

[0025] Second, the shear waves of the earthquake cause the rails to twist, and the slides at the twisted positions slide, reducing the local deformation of the rails and preventing them from breaking. The buffer sleepers can reduce the impact of the longitudinal waves of the earthquake.

[0026] Third, during an earthquake, the second bottom plate and the first bottom plate are misaligned, and the outer and inner baffles squeeze the elastic pad. Since the elastic pad is made of elastic material, it can buffer the squeezing of the outer and inner baffles, so that the structure remains stable and does not deform.

[0027] Fourthly, the pressure on the top of the lower support plate increases dramatically, and the top pressure squeezes the upper support plate. Due to the arc design, the upper support plate is in uniform contact with the middle support plate. The upper support plate and the middle support plate transmit the pressure evenly, and the lower support plate is subjected to uniform pressure, making the structure of the lower support plate more pressure-resistant. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic front view of the structure of an assembled underground seismic-resistant structure of a subway station proposed by the present invention.

[0029] Figure 2 This is a rear structural schematic diagram of an assembled underground seismic-resistant structure of a subway station proposed by the present invention.

[0030] Figure 3 This is a schematic cross-sectional view of an underground seismic-resistant structure of an assembled subway station proposed by the present invention.

[0031] Figure 4 The invention provides an assembled underground seismic structure for a subway station. Figure 3 Enlarged structural diagram at A in the middle.

[0032] Figure 5 The invention provides an assembled underground seismic structure for a subway station. Figure 3 Enlarged structural diagram at B in the middle.

[0033] Figure 6 A schematic diagram of a shielding shell structure of an assembled underground seismic-resistant structure of a subway station proposed by the present invention.

[0034] Figure 7 This is a schematic diagram of the first connecting plate structure of an assembled subway station underground seismic resistant structure proposed by the present invention.

[0035] Figure 8 A schematic diagram of the partial structure of an assembled underground seismic-resistant structure of a subway station proposed by the present invention.

[0036] In the figure: 1. first frame; 2. upper support plate; 3. middle support plate; 4. connecting plate; 5. second frame; 6. first connecting slide rail; 7. stabilizing slide rail; 8. rail; 9. second bottom plate; 10. lower support plate; 11. first friction plate; 12. second friction plate; 13. third friction plate; 14. friction protrusion; 15. upper connecting block; 16. side connecting block; 17. first bottom plate; 18. first friction hole; 19. second friction hole; 20. third friction hole; 21. sliding plate; 22. buffer sleeper rail; 23. sliding plate; 24. second connecting slide rail; 25. shielding shell; 26. first connecting plate; 27. first rotating block; 28. first sliding block; 29. ​​second connecting plate; 30. second rotating block; 31. second sliding block; 32. outer stop bar; 33. elastic pad; 34. inner stop bar. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] The present invention discloses an assembled underground seismic resistant structure for a subway station, which is mainly used in scenarios where a general subway station structure is subjected to the impact of an earthquake. The transverse wave causes the rails to be severely deformed or even broken, and the longitudinal wave causes the tunnel to collapse and become blocked, thus failing to ensure the functions of the rails and the tunnel.

[0039] An assembled underground seismic resistant structure of a subway station comprises a first frame 1 and a second frame 5, a first bottom plate 17 is fixedly connected to one side of the first frame 1, a second bottom plate 9 is fixedly connected to the bottom of the second frame 5, and a lower support plate 10 is fixedly connected to the upper surface of the first bottom plate 17;

[0040] A pressure-bearing mechanism is installed on the top of the lower support plate 10, and the pressure-bearing mechanism is used to disperse the pressure on the top;

[0041] Connecting mechanisms are installed at both side edges of the top of the lower support plate 10, and the connecting mechanisms are used to isolate the space inside and outside the tunnel;

[0042] Friction damping mechanisms are installed on both sides of the lower support plate 10, and the friction damping mechanisms are used to provide friction;

[0043] A sliding buffer mechanism is installed on the upper surface of the second bottom plate 9 and the first bottom plate 17, and the sliding buffer mechanism is used to ensure the connection of the rails;

[0044] Sliding connection mechanisms are respectively installed on both sides of the second base plate 9 and the first base plate 17, and the sliding connection mechanisms are used to maintain the connection between the second base plate 9 and the first base plate 17. The sliding connection mechanisms include first connecting rails 6 respectively fixedly connected to both sides of the first base plate 17, and second connecting rails 24 are respectively fixedly connected to both sides of the second base plate 9. One side of the first connecting rail 6 is slidably connected to a first sliding block 28, and one side of the second connecting rail 24 is slidably connected to a second sliding block 31, and a movable connection mechanism is installed between the first sliding block 28 and the second sliding block 31.

[0045] In this embodiment, the first frame 1 is installed at the subway entrance and exit of the subway station. The first frame 1 and the second frame 5 play the role of frame support. The lower support plate 10 plays the role of isolating the space inside and outside the tunnel. The external space of the lower support plate 10 is filled with various materials. A certain space is left between the second bottom plate 9 and the first bottom plate 17, which is filled with building materials.

[0046] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 In a preferred embodiment, the pressure-bearing mechanism includes a middle support plate 3 fixedly connected to the top of the lower support plate 10, the top of the middle support plate 3 is fixedly connected to the upper support plate 2, an upper connecting block 15 is fixedly connected to the outer wall of one side of the lower support plate 10 near the top, two side connecting blocks 16 are fixedly connected to one side of the lower support plate 10, and a plurality of friction protrusions 14 are arranged on the outer walls of the first frame 1 and the second frame 5.

[0047] In this embodiment, when an earthquake occurs, the pressure on the top of the lower support plate 10 increases dramatically, and the top pressure squeezes the upper support plate 2. Due to the arc design, the upper support plate 2 is in uniform contact with the middle support plate 3. The upper support plate 2 and the middle support plate 3 transmit the pressure evenly, and the lower support plate 10 is subjected to uniform pressure, making the structure of the lower support plate 10 more pressure-resistant.

[0048] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 In a preferred embodiment, the connecting mechanism includes an inner baffle 34 arranged at the edge positions on both sides of the lower support plate 10, one side of the inner baffle 34 is slidably connected to an elastic pad 33, one side of the elastic pad 33 is slidably connected to an outer baffle 32, and the top of the outer baffle 32 is fixedly connected to the connecting plate 4, and the outer baffle 32 is symmetrically designed.

[0049] In this embodiment, the connecting plate 4 serves to isolate the space inside and outside the tunnel. The external space of the connecting plate 4 is filled with various materials. There is a connecting plate 4 between adjacent lower support plates 10. The function of the connecting plate 4 is to isolate the space inside and outside the lower support plate 10. During an earthquake, the positions of the second bottom plate 9 and the first bottom plate 17 are misaligned, and the outer baffle 32 and the inner baffle 34 squeeze the elastic pad 33. Since the material of the elastic pad 33 is elastic, it can buffer the squeezing of the outer baffle 32 and the inner baffle 34, so that the structure remains stable and does not deform.

[0050] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 In a preferred embodiment, the friction damping mechanism includes a first friction plate 11 fixedly connected to both sides of the lower support plate 10, second friction plates 12 are fixedly connected to both sides of the middle support plate 3 near the bottom, and third friction plates 13 are fixedly connected to both sides of the upper support plate 2 near the bottom. A plurality of first friction holes 18 are provided on the surface of the first friction plate 11, a plurality of second friction holes 19 are provided on the surface of the second friction plate 12, and a plurality of third friction holes 20 are provided on the surface of the third friction plate 13.

[0051] In this embodiment, when an earthquake shear wave strikes, since the first friction plate 11, the second friction plate 12 and the third friction plate 13 are buried in the building materials, there is huge friction between them and the building materials, making the upper support plate 2, the middle support plate 3 and the lower support plate 10 more stable.

[0052] Reference Figure 1 , Figure 2 , Figure 3 and Figure 5 In a preferred embodiment, the sliding buffer mechanism includes two stable slide rails 7 respectively fixedly connected to the upper surfaces of the second bottom plate 9 and the first bottom plate 17, a slide plate 23 is slidably connected inside the stable slide rail 7, a sliding plate 21 is fixedly connected to the upper surface of the slide plate 23, a buffer sleeper rail 22 is fixedly connected to the upper surface of the sliding plate 21, and the upper surface of the buffer sleeper rail 22 is fixedly connected to the rails 8 near the two ends.

[0053] In this embodiment, the shear wave of the earthquake causes the rail 8 to twist, and the slide plate 23 at the twisted position slides, reducing the local deformation of the rail 8 and preventing the rail 8 from breaking. The buffer sleeper rail 22 can reduce the impact of the longitudinal wave of the earthquake.

[0054] Reference Figure 1 , Figure 6 , Figure 7 and Figure 8In a preferred embodiment, the movable connection mechanism includes a first rotating block 27 rotatably connected to one side of the first sliding block 28, one side of the first rotating block 27 is rotatably connected to the first connecting plate 26, one side of the second sliding block 31 is rotatably connected to the second rotating block 30, one side of the second rotating block 30 is rotatably connected to the second connecting plate 29, the second connecting plate 29 and the first connecting plate 26 are also rotatably connected, the top of the first connecting plate 26 is fixedly connected to the shielding shell 25, the first frame 1 and the second frame 5 play the role of the frame, the upper support plate 2, the middle support plate 3 and the lower support plate A leaf spring is formed between the support plates 10 to evenly transfer the top load during an earthquake. The slide plate 23 and the stabilizing rail 7 slide relative to each other. During an earthquake, the rail 8 is twisted. The relative sliding between the slide plate 23 and the stabilizing rail 7 protects the rail 8 from breaking. The first connecting plate 26 and the second connecting plate 29 slide relative to each other, the first connecting plate 26 and the first rotating block 27 slide relative to each other, and the second connecting plate 29 and the second rotating block 30 slide relative to each other, thereby ensuring the connection between the second bottom plate 9 and the first bottom plate 17 and ensuring that the first frame 1 and the second frame 5 are not misaligned.

[0055] In this embodiment, during an earthquake, the positions of the second bottom plate 9 and the first bottom plate 17 are misaligned, thereby ensuring the connection between the second bottom plate 9 and the first bottom plate 17, preventing the rail 8 from breaking, and keeping the internal space unobstructed. The first connecting plate 26 and the second connecting plate 29 slide relative to each other, the first connecting plate 26 and the first rotating block 27 slide relative to each other, and the second connecting plate 29 and the second rotating block 30 slide relative to each other.

[0056] Working principle: when in use, the first frame 1 is installed at the subway entrance and exit of the subway station, the first frame 1 and the second frame 5 play the role of frame support, the lower support plate 10 and the connecting plate 4 play the role of isolating the space inside and outside the tunnel, the outer space of the lower support plate 10 and the connecting plate 4 is filled with various materials, and a certain space is left between the second bottom plate 9 and the first bottom plate 17, which is filled with building materials. When an earthquake occurs, the pressure on the top of the lower support plate 10 increases sharply, and the top pressure squeezes the upper support plate 2. Due to the arc design, the upper support plate 2 is in uniform contact with the middle support plate 3, and the upper support plate 2 and the middle support plate 3 transmit the pressure evenly, and the lower support plate 10 is subjected to uniform pressure, making the structure of the lower support plate 10 more pressure-resistant. When the seismic shear wave impacts, the first friction plate 11, the second friction plate 12 and the third friction plate 13 are buried in the building materials, and there is huge friction between the building materials, making the upper support plate 2, the middle support plate 3 and the lower support plate 10 more stable, and the earthquake The transverse wave causes the rail 8 to be twisted, and the slide plate 23 at the twisted position slides, thereby reducing the local deformation of the rail 8 and preventing the rail 8 from breaking. The buffer sleeper rail 22 can reduce the impact of the earthquake longitudinal wave. During an earthquake, the second bottom plate 9 and the first bottom plate 17 are misaligned, and the first connecting plate 26 and the second connecting plate 29 slide relative to each other, and the first connecting plate 26 and the first rotating block 27 slide relative to each other, and the second connecting plate 29 and the second rotating block 30 slide relative to each other, thereby ensuring the connection between the second bottom plate 9 and the first bottom plate 17, so that the rail 8 will not break and the internal space remains unobstructed. There is a connecting plate 4 between adjacent lower support plates 10. The function of the connecting plate 4 is to isolate the space inside and outside the lower support plate 10. During an earthquake, the second bottom plate 9 and the first bottom plate 17 are misaligned, and the outer baffle 32 and the inner baffle 34 squeeze the elastic pad 33. Since the material of the elastic pad 33 is elastic, it can buffer the squeezing of the outer baffle 32 and the inner baffle 34, so that the structure remains stable and does not deform.

[0057] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An assembled underground seismic resistant structure of a subway station, comprising a first frame (1) and a second frame (5), characterized in that: A first bottom plate (17) is fixedly connected to one side of the first frame (1), a second bottom plate (9) is fixedly connected to the bottom of the second frame (5), and a lower support plate (10) is fixedly connected to the upper surface of the first bottom plate (17); A pressure-bearing mechanism is installed on the top of the lower support plate (10), and the pressure-bearing mechanism is used to disperse the pressure on the top; Connecting mechanisms are installed at both side edges of the top of the lower support plate (10), and the connecting mechanisms are used to isolate the space inside and outside the tunnel; Friction damping mechanisms are installed on both sides of the lower support plate (10), and the friction damping mechanisms are used to provide friction force; The upper surfaces of the second bottom plate (9) and the first bottom plate (17) are provided with sliding buffer mechanisms, which are used to ensure the connection of the rails; A sliding connection mechanism is respectively installed on both sides of the second base plate (9) and the first base plate (17), and the sliding connection mechanism is used to maintain the connection between the second base plate (9) and the first base plate (17). The sliding connection mechanism comprises a first connecting slide rail (6) respectively fixedly connected to both sides of the first base plate (17), and a second connecting slide rail (24) is respectively fixedly connected to both sides of the second base plate (9), one side of the first connecting slide rail (6) is slidably connected to a first sliding block (28), and one side of the second connecting slide rail (24) is slidably connected to a second sliding block (31), and a movable connection mechanism is installed between the first sliding block (28) and the second sliding block (31).

2. The assembled underground seismic resistant structure of a subway station according to claim 1, characterized in that: The pressure-bearing mechanism comprises a middle support plate (3) fixedly connected to the top of a lower support plate (10); the top of the middle support plate (3) is fixedly connected to an upper support plate (2); an upper connecting block (15) is fixedly connected to a position near the top of an outer wall of one side of the lower support plate (10); two side connecting blocks (16) are fixedly connected to one side of the lower support plate (10); and a plurality of friction protrusions (14) are provided on the outer walls of the first frame (1) and the second frame (5).

3. The underground seismic resistant structure of a prefabricated subway station according to claim 2, characterized in that: The connection mechanism comprises an inner baffle (34) arranged at the edge positions of both sides of the lower support plate (10), one side of the inner baffle (34) is slidably connected to an elastic pad (33), one side of the elastic pad (33) is slidably connected to an outer baffle (32), the top of the outer baffle (32) is fixedly connected to a connecting plate (4), and the outer baffle (32) is symmetrically designed.

4. The assembled underground seismic resistant structure of a subway station according to claim 3, characterized in that: The friction damping mechanism comprises a first friction plate (11) fixedly connected to both sides of the lower support plate (10), second friction plates (12) fixedly connected to both sides of the middle support plate (3) near the bottom, and third friction plates (13) fixedly connected to both sides of the upper support plate (2) near the bottom, a plurality of first friction holes (18) are provided on the surface of the first friction plate (11), a plurality of second friction holes (19) are provided on the surface of the second friction plate (12), and a plurality of third friction holes (20) are provided on the surface of the third friction plate (13).

5. The underground seismic resistant structure of a prefabricated subway station according to claim 4, characterized in that: The sliding buffer mechanism comprises two stable slide rails (7) respectively fixedly connected to the upper surfaces of the second bottom plate (9) and the first bottom plate (17); a slide plate (23) is slidably connected inside the stable slide rail (7); a sliding plate (21) is fixedly connected to the upper surface of the slide plate (23); a buffer sleeper rail (22) is fixedly connected to the upper surface of the sliding plate (21); and rails (8) are respectively fixedly connected to the upper surface of the buffer sleeper rail (22) near both ends.

6. The underground seismic resistant structure of a prefabricated subway station according to claim 5, characterized in that: The movable connection mechanism comprises a first rotating block (27) rotatably connected to one side of a first sliding block (28); one side of the first rotating block (27) is rotatably connected to a first connecting plate (26); one side of the second sliding block (31) is rotatably connected to a second rotating block (30); one side of the second rotating block (30) is rotatably connected to a second connecting plate (29); the second connecting plate (29) and the first connecting plate (26) are also rotatably connected; and the top of the first connecting plate (26) is fixedly connected to a shielding shell (25).

7. The underground seismic resistant structure of a prefabricated subway station according to claim 6, characterized in that: The first frame (1) and the second frame (5) function as frames, and leaf springs are formed between the upper support plate (2), the middle support plate (3) and the lower support plate (10), so as to evenly transfer the top load during an earthquake.

8. The underground seismic resistant structure of a prefabricated subway station according to claim 7, characterized in that: The slide plate (23) and the stable slide rail (7) slide relative to each other. When an earthquake occurs, the rail (8) is twisted. The slide plate (23) and the stable slide rail (7) slide relative to each other to protect the rail (8) from breaking.

9. The underground seismic resistant structure of a prefabricated subway station according to claim 8, characterized in that: The first connecting plate (26) and the second connecting plate (29) slide relative to each other, and the first connecting plate (26) and the first rotating block (27) slide relative to each other.

10. The assembled underground seismic resistant structure of a subway station according to claim 9, characterized in that: The second connecting plate (29) and the second rotating block (30) slide relative to each other, thereby ensuring the connection between the second bottom plate (9) and the first bottom plate (17), and ensuring that the first frame (1) and the second frame (5) will not be misaligned.

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