A tunnel assembled inverted arch prefabricated structure convenient to disassemble

Abstract

The application relates to the technical field of inverted arch prefabricated structures, in particular to a tunnel assembled inverted arch prefabricated structure convenient to disassemble, which comprises a tunnel secondary lining, the bottom of the tunnel secondary lining is assembled with side prefabricated blocks, the side away from the tunnel secondary lining of the side prefabricated blocks is assembled with a center prefabricated block, positioning blocks are clamped and connected on the surfaces of the tunnel secondary lining and the side prefabricated blocks, a first assembling mechanism is arranged between the tunnel secondary lining and the side prefabricated blocks, and a second assembling mechanism is arranged between the side prefabricated blocks and the center prefabricated block. The first assembling mechanism and the second assembling mechanism are arranged between the tunnel secondary lining and the side prefabricated blocks and between the side prefabricated blocks and the center prefabricated block respectively, so that synchronous locking of multiple groups of limiting columns can be completed by only operating the end of the prefabricated block, long-time high-precision suspension alignment in a narrow space is avoided, the assembling efficiency is greatly improved, and time and labor are saved for rapid installation.

Description

Technical Field

[0001] This invention relates to the field of prefabricated invert arch structure technology, specifically to a prefabricated tunnel invert arch structure that is easy to disassemble. Background Technology

[0002] Precast invert arch structures for tunnels are a type of reinforced concrete component unit that is prefabricated in a factory and then quickly assembled at the tunnel construction site using mechanical connections to form a tunnel bottom invert arch support system. It is mainly used to bear the load of the upper surrounding rock and restrain the deformation of the bottom surrounding rock to maintain the overall stability of the tunnel. Compared with traditional on-site casting construction, this structure has significant advantages such as high quality of factory prefabrication, fast assembly speed, and environmentally friendly construction, making it a key component for realizing rapid and industrialized tunnel engineering construction.

[0003] Although existing prefabricated invert arch structures have accelerated construction efficiency through assembly, the assembly process requires the use of large lifting equipment to perform long-term, high-precision suspended alignment of the heavy prefabricated components. Furthermore, the connection points are often secured by welding or a large number of high-strength bolts. The narrow operating space leads to complex and cumbersome installation procedures, making assembly still time-consuming and labor-intensive. Therefore, there is an urgent need to design a prefabricated invert arch structure for tunnels that is easy to disassemble to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a prefabricated invert arch structure for tunnels that is easy to disassemble, in order to solve the problems mentioned in the background art, which require large lifting equipment to perform long-term high-precision suspended alignment of heavy prefabricated components during the assembly process, and the connection parts are often fastened by welding or a large number of high-strength bolts. The narrow operating space leads to complicated and cumbersome installation procedures, resulting in time-consuming and labor-intensive assembly.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a prefabricated invert arch structure for easy disassembly in tunnels: comprising a tunnel lining, with side prefabricated blocks assembled at the bottom of the tunnel lining, and a central prefabricated block assembled on the side of the side prefabricated blocks away from the tunnel lining; positioning blocks are engaged and connected to the surfaces of the tunnel lining and the side prefabricated blocks; a first assembly mechanism is placed between the tunnel lining and the side prefabricated blocks; a second splicing mechanism is provided between the side prefabricated blocks and the central prefabricated block; the first splicing mechanism includes a first limiting post inserted into the bottom of the tunnel lining; a first screw is rotatably connected to the surface of the tunnel lining; a first square nut is threadedly connected to the surface of the first screw; a first adjusting rod is rotatably connected to the surface of the first square nut; a lifting rod is slidably connected inside the side prefabricated blocks; and the surface of the lifting rod... A first limiting post is fixedly connected to the top. The end of the first adjusting rod away from the first square nut is rotatably connected to the bottom of the lifting rod. The second splicing mechanism includes a second limiting post, which is inserted into the surface of the side precast block. A second screw is rotatably connected to the surface of the side precast block. A moving rod is threadedly connected to the surface of the second screw. A second adjusting rod is rotatably connected to the surface of the moving rod. A transverse plate is slidably connected to the surface of the side precast block. The end of the second adjusting rod away from the moving rod is rotatably connected to the transverse plate. A guide post is fixedly connected to the surface of the side precast block. A lifting plate is slidably connected to the surface of the guide post. A second limiting post is fixedly connected to the surface of the lifting plate. A third adjusting rod is rotatably connected to the surface of the lifting plate. The end of the third adjusting rod away from the lifting plate is rotatably connected to the surface of the transverse plate.

[0006] Preferably, a first hexagonal knob is fixedly connected to the end of the first screw, a first slide rod is slidably connected to the surface of the side precast block, a first moving block is fixedly connected to the surface of the first slide rod, a first limiting rod is fixedly connected to the surface of the first moving block, a first spring is fixedly connected to the surface of the first moving block, and the end of the first spring away from the first moving block is fixedly connected to the surface of the side precast block.

[0007] Preferably, a second hexagonal knob is fixedly connected to the end of the second screw, a second slide rod is slidably connected to the surface of the side precast block, a second moving block is fixedly connected to the surface of the second slide rod, a second limiting rod is fixedly connected to the surface of the second moving block, a second spring is fixedly connected to the surface of the second moving block, and the end of the second spring away from the second moving block is fixedly connected to the surface of the side precast block.

[0008] Preferably, a triangular groove is formed on the surface of the tunnel secondary lining, and a rectangular groove is formed on the surface of the side precast block. The positioning block is simultaneously engaged with the triangular groove of the tunnel secondary lining and the rectangular groove of the side precast block. The second limiting pile is in the shape of a right trapezoid.

[0009] Preferably, multiple sets of the first square nuts and the first adjusting rods are provided and are arranged linearly and evenly. The first screw drives multiple sets of first square nuts to slide on the side precast block by rotation, and the multiple sets of first square nuts, together with multiple sets of first adjusting rods, push the lifting rod to slide and rise inside the side precast block.

[0010] Preferably, a trapezoidal groove is provided at the bottom of the tunnel secondary lining, and the first limiting pile is inserted into the trapezoidal groove at the bottom of the tunnel secondary lining in a trapezoidal shape. Multiple sets of limiting grooves are provided at the bottom of the tunnel secondary lining, and multiple sets of limiting holes are provided on the surface of the first limiting pile. The lifting rod drives the first limiting post to pass through the limiting hole of the first limiting pile and is inserted into the limiting groove of the tunnel secondary lining.

[0011] Preferably, multiple sets of the moving rods and the second adjusting rods are provided and are arranged linearly inside the side precast block. The second screw drives the multiple sets of moving rods to move synchronously by rotation, and the multiple sets of moving rods cooperate with the multiple sets of second adjusting rods to drive the transverse plate to slide horizontally on the surface of the side precast block.

[0012] Preferably, multiple sets of limiting holes are formed on the surface of the second limiting pile, and multiple sets of the second limiting posts are provided at the bottom of the lifting plate, which are arranged linearly and evenly. The transverse plate drives the lifting plate to slide and rise on the guide post through horizontal sliding cooperation with the third adjusting rod, and the lifting plate drives multiple sets of second limiting posts to be inserted into the limiting holes of the second limiting pile. Multiple sets of guide posts and third adjusting rods are provided, and multiple sets of guide posts and third adjusting rods are arranged in a cross pattern.

[0013] Preferably, the first moving block and the first limiting rod slide on the side prefabricated block via the first spring. A limiting groove is formed on the surface of the first hexagonal knob, and the limiting grooves are arranged in a circular and uniform manner. The elastic force of the first spring acts on the first limiting rod through the first moving block, and the first limiting rod is inserted into the limiting groove of the first hexagonal knob.

[0014] Preferably, the second limiting rod slides and rises and falls on the side precast block via the second sliding rod and the second moving block. A limiting groove is formed on the surface of the second hexagonal knob, and the limiting grooves are arranged in a circular and uniform manner. The elastic force of the second spring acts on the second limiting rod through the second moving block, and the second limiting rod is inserted into the limiting groove of the second hexagonal knob.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This precast invert arch structure, by setting up a first splicing mechanism and a second splicing mechanism, consisting of components such as a first limiting pile, a first screw, a lifting rod, a second limiting pile, a second screw, a transverse plate, and a lifting plate, between the tunnel secondary lining and the side precast blocks, and between the side precast blocks and the central precast blocks, respectively, achieves the synchronous locking of multiple sets of limiting columns by operating only at the end of the precast blocks. This avoids long-term high-precision suspended alignment in narrow spaces, thereby greatly improving the assembly efficiency and achieving time-saving and labor-saving rapid installation.

[0016] 2. The prefabricated invert arch structure achieves automatic locking of the first and second screws by setting a first limiting mechanism consisting of a first sliding rod, a first moving block, a first limiting rod, and a first spring at the first hexagonal knob, and a second limiting mechanism consisting of a second sliding rod, a second moving block, a second limiting rod, and a second spring at the second hexagonal knob, effectively preventing loosening caused by vibration; at the same time, the limiting mechanism can be released and the screws can be rotated in the opposite direction for disassembly simply by pulling the sliding rod, achieving a balance between locking reliability and disassembly convenience. Attached Figure Description

[0017] Figure 1 This is a frontal perspective view of the structure of the present invention; Figure 2 This is a front view schematic diagram of the structure of the present invention; Figure 3 This is a three-dimensional schematic diagram of the tunnel secondary lining and side precast block structure of the present invention, including front view, bottom view, and cross-sectional view. Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A; Figure 5 This is a frontal exploded perspective view of one end structure of the side prefabricated block of the present invention; Figure 6 This is a frontal sectional perspective view of the side prefabricated block and the central prefabricated block structure of the present invention; Figure 7 This is a front sectional view of the side precast block and center precast block structure of the present invention; Figure 8 For the present invention Figure 6 A magnified structural diagram at point B in the middle.

[0018] In the diagram: 1. Tunnel secondary lining; 11. Side precast block; 12. Center precast block; 13. First limiting post; 14. Second limiting post; 15. Positioning block; 2. First screw; 21. First square nut; 22. First adjusting rod; 23. Lifting rod; 24. First limiting post; 25. First hexagonal knob; 26. First sliding rod; 27. First spring; 28. First moving block; 29. ​​First limiting rod; 3. Second screw; 31. Moving rod; 32. Second adjusting rod; 33. Horizontal sliding plate; 34. Guide post; 35. Lifting plate; 36. Second limiting post; 37. Third adjusting rod; 4. Second sliding rod; 41. Second moving block; 42. Second limiting rod; 43. Second spring; 44. Second hexagonal knob. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1-8 One embodiment provided by the present invention: A prefabricated invert arch structure for easy disassembly in tunnels includes a secondary tunnel lining 1. Side prefabricated blocks 11 are assembled at the bottom of the secondary tunnel lining 1. A central prefabricated block 12 is assembled on the side of the side prefabricated blocks 11 away from the secondary tunnel lining 1. Positioning blocks 15 are engaged and connected to the surfaces of the secondary tunnel lining 1 and the side prefabricated blocks 11. A first assembly mechanism is placed between the secondary tunnel lining 1 and the side prefabricated blocks 11. A second splicing mechanism is provided between the side prefabricated blocks 11 and the central prefabricated block 12. The first splicing mechanism includes a first limiting stake 13, which is inserted into the bottom of the secondary tunnel lining 1. A first screw 2 is rotatably connected to the surface of the first screw 2. A first square nut 21 is threaded onto the surface of the first screw 2. A first adjusting rod 22 is rotatably connected to the surface of the first square nut 21. A lifting rod 23 is slidably connected inside the side precast block 11. A first limiting post 24 is fixedly connected to the surface of the lifting rod 23. The end of the first adjusting rod 22 away from the first square nut 21 is rotatably connected to the bottom of the lifting rod 23. The second splicing mechanism includes a second limiting post 14, which is inserted into the surface of the side precast block 11. A second limiting post 24 is rotatably connected to the surface of the side precast block 11. The screw 3 has a threaded connection to a moving rod 31 on its surface, and a second adjusting rod 32 is rotatably connected to the surface of the moving rod 31. A transverse plate 33 is slidably connected to the surface of the side precast block 11. The end of the second adjusting rod 32 away from the moving rod 31 is rotatably connected to the transverse plate 33. A guide post 34 is fixedly connected to the surface of the side precast block 11, and a lifting plate 35 is slidably connected to the surface of the guide post 34. A second limiting post 36 is fixedly connected to the surface of the lifting plate 35, and a third adjusting rod 37 is rotatably connected to the surface of the lifting plate 35. The third adjusting rod 37 is located away from the lifting plate. One end of 35 is rotatably connected to the surface of the transverse plate 33. The precast invert arch structure is composed of side precast blocks 11 and center precast blocks 12. Through the first splicing mechanism and the second splicing mechanism, the installation of side precast blocks 11 at the bottom of the tunnel secondary lining 1 and the installation of center precast blocks 12 on side precast blocks 11 can be quickly realized. Moreover, the operation can be carried out on one side only at the ends of side precast blocks 11 and center precast blocks 12. The operation avoids narrow space, improves the installation speed, avoids long-term high-precision suspended alignment, saves time and effort, and improves the efficiency of assembly.

[0021] Furthermore, a first hexagonal knob 25 is fixedly connected to the end of the first screw 2, a first slide rod 26 is slidably connected to the surface of the side prefabricated block 11, a first moving block 28 is fixedly connected to the surface of the first slide rod 26, a first limiting rod 29 is fixedly connected to the surface of the first moving block 28, and a first spring 27 is fixedly connected to the surface of the first moving block 28. The end of the first spring 27 away from the first moving block 28 is fixedly connected to the surface of the side prefabricated block 11. The above are the components of the first limiting mechanism. By limiting the first hexagonal knob 25 with the first limiting rod 29, the rotation of the first screw 2 is prevented, thereby ensuring the stability of the first splicing mechanism during use.

[0022] Furthermore, a second hexagonal knob 44 is fixedly connected to the end of the second screw 3, a second slide rod 4 is slidably connected to the surface of the side precast block 11, a second moving block 41 is fixedly connected to the surface of the second slide rod 4, a second limiting rod 42 is fixedly connected to the surface of the second moving block 41, and a second spring 43 is fixedly connected to the surface of the second moving block 41. The end of the second spring 43 away from the second moving block 41 is fixedly connected to the surface of the side precast block 11. The above is the second limiting mechanism. The second hexagonal knob 44 is limited by the second limiting rod 42, thereby preventing the second screw 3 from rotating and ensuring the stability of the second splicing mechanism.

[0023] Furthermore, a triangular groove is formed on the surface of the secondary tunnel lining 1, and a rectangular groove is formed on the surface of the side precast block 11. The positioning block 15 is simultaneously engaged with the triangular groove of the secondary tunnel lining 1 and the rectangular groove of the side precast block 11. The second limiting pile 14 is in the shape of a right trapezoid. The second limiting pile 14 limits the secondary tunnel lining 1 at the bottom of the secondary tunnel lining 1. The positioning block 15 positions the side precast block 11 at the bottom of the secondary tunnel lining 1 through the triangular groove of the secondary tunnel lining 1 and the rectangular groove of the side precast block 11. When positioning the center precast block 12, it is only necessary to align it with the side precast blocks 11 on both sides of the center precast block 12, which improves the installation efficiency of the side precast blocks 11 and the center precast block 12.

[0024] Furthermore, multiple sets of first square nuts 21 and first adjusting rods 22 are provided and are arranged linearly and evenly. The first screw 2 drives multiple sets of first square nuts 21 to slide on the side precast block 11 by rotation. The multiple sets of first square nuts 21, together with multiple sets of first adjusting rods 22, push the lifting rod 23 to slide and rise and fall inside the side precast block 11. One end of the first adjusting rod 22 will rotate and move, and the end of the first adjusting rod 22 near the lifting rod 23 will also rotate, thereby pushing the lifting rod 23 to rise and fall. The multi-set linkage design makes the lifting rod 23 evenly stressed and rise and fall smoothly, ensuring that multiple first limiting posts 24 can be inserted or withdrawn from the first limiting pile 13 and the tunnel secondary lining 1 synchronously and accurately. This avoids the jamming or uneven stress problems that may be caused by single-point drive and improves the smoothness of disassembly and assembly.

[0025] Furthermore, a trapezoidal groove is provided at the bottom of the secondary lining 1 of the tunnel. The first limiting pile 13, in a trapezoidal shape, is inserted into the trapezoidal groove at the bottom of the secondary lining 1 of the tunnel. Multiple sets of limiting grooves are provided at the bottom of the secondary lining 1 of the tunnel, and multiple sets of limiting holes are provided on the surface of the first limiting pile 13. The lifting rod 23 drives the first limiting column 24 to pass through the limiting hole of the first limiting pile 13 and be inserted into the limiting groove of the secondary lining 1 of the tunnel. The trapezoidal design of the first limiting pile 13 allows it to be quickly inserted into the trapezoidal groove of the secondary lining 1 of the tunnel during installation, playing a guiding and initial fixing role. The first limiting column 24 passes through the limiting hole of the first limiting pile 13 in sequence and goes deep into the limiting groove of the secondary lining 1 of the tunnel, forming a double lock, ensuring high strength and reliability of the connection. When disassembling, the first limiting column 24 only needs to be withdrawn from the limiting groove and the limiting hole to release the lock. The structure is simple and efficient.

[0026] Furthermore, multiple sets of moving rods 31 and second adjusting rods 32 are provided and linearly arranged inside the side precast block 11. The second screw 3 drives multiple sets of moving rods 31 to move synchronously by rotation. The multiple sets of moving rods 31, in conjunction with multiple sets of second adjusting rods 32, drive the transverse plate 33 to slide horizontally on the surface of the side precast block 11. One end of the second adjusting rod 32 rotates and moves, while the end of the second adjusting rod 32 near the transverse plate 33 also rotates, thereby pushing the transverse plate 33 to slide horizontally inside the side precast block 11. By rotating a single second screw 3, multiple moving rods 31 can be driven to move synchronously, which is then converted into a smooth horizontal movement of the transverse plate 33. This transmission method reduces the number of operation steps, ensures that the transverse plate 33 is subjected to consistent force at all points, and has a precise movement trajectory, providing a stable and reliable power input for the subsequent driving of the lifting plate 35 by the third adjusting rod 37.

[0027] Furthermore, multiple sets of limiting holes are formed on the surface of the second limiting post 14, and multiple sets of second limiting posts 36 are provided at the bottom of the lifting plate 35, arranged linearly and evenly. The transverse plate 33 drives the lifting plate 35 to slide and rise on the guide post 34 through horizontal sliding cooperation with the third adjusting rod 37. During the sliding process, the transverse plate 33 moves and rotates one end of the third adjusting rod 37, and the end of the third adjusting rod 37 near the lifting plate 35 also rotates, pushing the lifting plate 35 and the second limiting post 36 to rise and fall horizontally. The transverse plate 33 is provided with There are two sets of third adjusting rods 37, which respectively push two sets of lifting plates 35 and second limiting posts 36 to limit their movement. The lifting plates 35 drive multiple sets of second limiting posts 36 to insert into the limiting holes of the second limiting posts 14. Multiple sets of guide posts 34 and third adjusting rods 37 are provided, and the multiple sets of guide posts 34 and third adjusting rods 37 are arranged in a cross pattern to avoid contact. The adjusting rods 37 are cleverly converted into the vertical movement of the lifting plates 35, realizing the change of movement direction, thereby driving the second limiting posts 36 to vertically insert or withdraw from the limiting holes of the second limiting posts 14. The guide posts 34 ensure the verticality and stability of the movement of the lifting plates 35, while the cross arrangement avoids mutual interference during the movement of the mechanism, ensuring that the second splicing mechanism can reliably lock or release the central precast block 12 even in narrow spaces.

[0028] Furthermore, the first moving block 28 and the first limiting rod 29 slide on the side prefabricated block 11 via the first spring 27. A limiting groove is formed on the surface of the first hexagonal knob 25, and these grooves are evenly arranged in a circle. The elastic force of the first spring 27 acts on the first limiting rod 29 through the first moving block 28, and the first limiting rod 29 is inserted into the limiting groove of the first hexagonal knob 25. After installation or disassembly, the elastic force of the first spring 27 automatically pushes the first limiting rod 29 into the limiting groove of the first hexagonal knob 25, achieving automatic locking and effectively preventing the first screw 2 from loosening due to vibrations from vehicle traffic. When disassembly is required, simply pull the first sliding rod 26 manually to overcome the spring force to unlock. This convenient operation achieves a good balance between automated locking and manual disassembly.

[0029] Furthermore, the second limiting rod 42 slides and rises on the side prefabricated block 11 via the second sliding rod 4 and the second moving block 41. Limiting grooves are formed on the surface of the second hexagonal knob 44, and the limiting grooves are arranged in a circular and uniform manner. The elastic force of the second spring 43 acts on the second limiting rod 42 through the second moving block 41, and the second limiting rod 42 is inserted into the limiting groove of the second hexagonal knob 44. The circular and uniformly arranged limiting groove design allows the second limiting rod 42 to lock at multiple rotation angles of the second hexagonal knob 44, improving the flexibility and reliability of locking. Whether in the assembled state or the disassembled state, the second hexagonal knob 44 can be effectively fixed to prevent misoperation or accidental loosening.

[0030] Working principle: The precast invert arch structure consists of side precast blocks 11 and a central precast block 12. When installing the side precast blocks 11, the first limiting stake 13 is first inserted into the trapezoidal groove at the bottom of the tunnel secondary lining 1, and the positioning block 15 is used to engage the triangular groove of the tunnel secondary lining 1 with the rectangular groove of the side precast block 11 to achieve initial positioning. Then, at the end of the side precast block 11, the first screw 2 is rotated to drive multiple sets of first square nuts 21 to move. The first square nuts 21 push the lifting rod 23 to rise through the first adjusting rod 22, so that multiple sets of first limiting posts 24 on the lifting rod 23 simultaneously pass through the limiting holes of the first limiting stake 13 and are inserted into the limiting groove of the tunnel secondary lining 1, completing the locking of the side precast block 11. The central precast block is then installed. At 12 o'clock, the second limiting stake 14 is inserted into the surface of the side precast block 11 to make the central precast block 12 flush with the two side precast blocks 11 for positioning. Then, the operation is carried out at the end of the side precast block 11. By rotating the second screw 3, multiple sets of moving rods 31 are driven to move. The moving rods 31 push the horizontal sliding plate 33 to slide horizontally through the second adjusting rod 32. The horizontal sliding plate 33 then pushes the lifting plate 35 to rise along the guide column 34 through the third adjusting rod 37, so that multiple sets of second limiting stakes 36 on the lifting plate 35 are simultaneously inserted into the limiting holes of the second limiting stake 14 to complete the locking of the central precast block 12. The entire installation process only needs to be carried out at the end of the precast block, avoiding the operation restrictions in narrow spaces and high-precision suspended alignment, and greatly improving the assembly efficiency.

[0031] In the first splicing mechanism, a first hexagonal knob 25 is fixedly connected to the end of the first screw 2, and a first slide rod 26 is slidably connected to the side prefabricated block 11. The first slide rod 26 is fixedly connected to a first limiting rod 29 and a first spring 27 via a first moving block 28. The other end of the first spring 27 is fixed to the side prefabricated block 11. When the first limiting post 24 is locked in place, the elastic force of the first spring 27 pushes the first limiting rod 29 through the first moving block 28 to automatically engage with the limiting grooves evenly arranged in a circle on the surface of the first hexagonal knob 25, thereby preventing the first screw 2 from rotating due to vibration and ensuring the reliability of the first splicing mechanism. Similarly, in the second splicing mechanism, the end of the second screw 3... The first part is fixedly connected to a second hexagonal knob 44, and the second slide rod 4 is slidably connected to the side prefabricated block 11. The second slide rod 4 is fixedly connected to a second limiting rod 42 and a second spring 43 through a second moving block 41. The other end of the second spring 43 is fixed to the side prefabricated block 11. When the second limiting post 36 is locked in place, the elastic force of the second spring 43 pushes the second limiting rod 42 through the second moving block 41 to automatically engage in the limiting groove of the second hexagonal knob 44, preventing the second screw 3 from loosening. When disassembly is required, simply pull the first slide rod 26 or the second slide rod 4 to disengage the limiting rod from the limiting groove, and then rotate the knob in the opposite direction to unlock it. This achieves a combination of automated locking and convenient disassembly.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A prefabricated invert arch structure for tunnels that is easy to disassemble, characterized in that: The system includes a tunnel lining (1), with side precast blocks (11) assembled at the bottom of the tunnel lining (1), and a center precast block (12) assembled on the side of the side precast blocks (11) away from the tunnel lining (1). Positioning blocks (15) are engaged and connected on the surfaces of the tunnel lining (1) and the side precast blocks (11). A first assembly mechanism is provided between the tunnel lining (1) and the side precast blocks (11), and a second splicing mechanism is provided between the side precast blocks (11) and the center precast block (12). The first splicing mechanism includes a first limiting post. (13), the first limiting post (13) is inserted into the bottom of the tunnel secondary lining (1), the surface of the tunnel secondary lining (1) is rotatably connected to the first screw (2), the surface of the first screw (2) is threadedly connected to the first square nut (21), the surface of the first square nut (21) is rotatably connected to the first adjusting rod (22), the inside of the side precast block (11) is slidably connected to the lifting rod (23), the surface of the lifting rod (23) is fixedly connected to the first limiting post (24), the first adjusting rod (22) is away from the first One end of a square nut (21) is rotatably connected to the bottom of a lifting rod (23). The second splicing mechanism includes a second limiting post (14), which is inserted into the surface of a side precast block (11). A second screw (3) is rotatably connected to the surface of the side precast block (11). A moving rod (31) is threadedly connected to the surface of the second screw (3). A second adjusting rod (32) is rotatably connected to the surface of the moving rod (31). A transverse sliding plate (33) is slidably connected to the surface of the side precast block (11). The end of the second adjusting rod (32) away from the moving rod (31) is rotatably connected to the transverse plate (33). A guide post (34) is fixedly connected to the surface of the side precast block (11). A lifting plate (35) is slidably connected to the surface of the guide post (34). A second limiting post (36) is fixedly connected to the surface of the lifting plate (35). A third adjusting rod (37) is rotatably connected to the surface of the lifting plate (35). The end of the third adjusting rod (37) away from the lifting plate (35) is rotatably connected to the surface of the transverse plate (33).

2. The easily disassembled prefabricated tunnel invert arch structure according to claim 1, characterized in that: The end of the first screw (2) is fixedly connected to a first internal hexagonal knob (25), the surface of the side precast block (11) is slidably connected to a first slide rod (26), the surface of the first slide rod (26) is fixedly connected to a first moving block (28), the surface of the first moving block (28) is fixedly connected to a first limiting rod (29), the surface of the first moving block (28) is fixedly connected to a first spring (27), and the end of the first spring (27) away from the first moving block (28) is fixedly connected to the surface of the side precast block (11).

3. The easily disassembled prefabricated tunnel invert arch structure according to claim 1, characterized in that: The end of the second screw (3) is fixedly connected to a second internal hexagonal knob (44), the surface of the side precast block (11) is slidably connected to a second slide rod (4), the surface of the second slide rod (4) is fixedly connected to a second moving block (41), the surface of the second moving block (41) is fixedly connected to a second limiting rod (42), the surface of the second moving block (41) is fixedly connected to a second spring (43), and the end of the second spring (43) away from the second moving block (41) is fixedly connected to the surface of the side precast block (11).

4. The easily disassembled prefabricated invert arch structure for tunnels according to claim 1, characterized in that: The surface of the tunnel lining (1) is provided with a triangular groove, and the surface of the side precast block (11) is provided with a rectangular groove. The positioning block (15) is simultaneously engaged and connected to the triangular groove of the tunnel lining (1) and the rectangular groove of the side precast block (11). The second limiting pile (14) is in the shape of a right trapezoid.

5. The easily disassembled prefabricated tunnel invert arch structure according to claim 1, characterized in that: The first square nut (21) and the first adjusting rod (22) are provided in multiple sets and are arranged linearly and evenly. The first screw (2) drives multiple sets of first square nuts (21) to slide on the side precast block (11) by rotation. The multiple sets of first square nuts (21) cooperate with multiple sets of first adjusting rods (22) to push the lifting rod (23) to slide and rise inside the side precast block (11).

6. The easily disassembled prefabricated invert arch structure for tunnels according to claim 1, characterized in that: The bottom of the tunnel lining (1) is provided with a trapezoidal groove. The first limiting pile (13) is inserted into the trapezoidal groove at the bottom of the tunnel lining (1) in a trapezoidal shape. The bottom of the tunnel lining (1) is provided with multiple sets of limiting grooves. The surface of the first limiting pile (13) is provided with multiple sets of limiting holes. The lifting rod (23) drives the first limiting column (24) to pass through the limiting hole of the first limiting pile (13) and be inserted into the limiting groove of the tunnel lining (1).

7. A prefabricated tunnel invert arch structure that is easy to disassemble according to claim 1, characterized in that: The moving rod (31) and the second adjusting rod (32) are provided in multiple sets and are arranged linearly inside the side precast block (11). The second screw (3) drives the multiple sets of moving rods (31) to move synchronously by rotation, and the multiple sets of moving rods (31) cooperate with the multiple sets of second adjusting rods (32) to drive the transverse plate (33) to slide horizontally on the surface of the side precast block (11).

8. The easily disassembled prefabricated invert arch structure for tunnels according to claim 1, characterized in that: The second limiting post (14) has multiple sets of limiting holes on its surface. The second limiting post (36) is provided in multiple sets at the bottom of the lifting plate (35) and is arranged linearly and evenly. The transverse plate (33) drives the lifting plate (35) to slide and rise on the guide post (34) by horizontal sliding cooperation with the third adjusting rod (37). The lifting plate (35) drives multiple sets of second limiting posts (36) to be inserted into the limiting holes of the second limiting post (14). The guide post (34) and the third adjusting rod (37) are provided in multiple sets and are arranged in a cross pattern.

9. A prefabricated tunnel invert arch structure that is easy to disassemble according to claim 2, characterized in that: The first moving block (28) and the first limiting rod (29) slide on the side prefabricated block (11) through the first spring (27). The surface of the first hexagonal knob (25) is provided with a limiting groove, and the limiting groove is arranged in a circular and uniform manner. The elastic force of the first spring (27) acts on the first limiting rod (29) through the first moving block (28), and the first limiting rod (29) is inserted into the limiting groove of the first hexagonal knob (25).

10. A prefabricated tunnel invert arch structure that is easy to disassemble according to claim 3, characterized in that: The second limiting rod (42) slides and rises on the side precast block (11) via the second slide rod (4) and the second moving block (41). The surface of the second internal hexagonal knob (44) has a limiting groove, and the limiting groove is arranged in a circular and uniform manner. The elastic force of the second spring (43) acts on the second limiting rod (42) through the second moving block (41), and the second limiting rod (42) is inserted into the limiting groove of the second internal hexagonal knob (44).

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