A tunnel reinforcement structure

Abstract

The utility model relates to a kind of tunnel reinforcing structure, it is related to tunnel construction technical field;Including corrugated arc steel sheet, corrugated arc steel sheet is installed in layer side, adjacent corrugated arc steel sheet is connected by first connecting component;Grating arc steel sheet, grating arc steel sheet is installed in reverse bias side, adjacent grating arc steel sheet is connected by second connecting component;Adjacent corrugated arc steel sheet and grating arc steel sheet are connected by third connecting component;By installing corrugated arc steel sheet in tunnel layer side, grating arc steel sheet is installed in reverse bias side, and the specific height of connecting plate is flexibly adjusted using height adjusting member, effectively compensate the height deviation of adjacent arc steel sheet due to installation foundation uneven or self structure difference, ensure that connecting plate butt joint surface is flush, installation hole is aligned;Realize the quick, reliable connection and fixing between different types of arc steel sheet, finally reach the differentiated support and self-adaptive connection adjustment for asymmetric geological conditions.

Description

Technical Field

[0001] This utility model relates to the field of tunnel and underground engineering support technology, and in particular to a tunnel reinforcement structure. Background Technology

[0002] Tunnels and underground engineering projects face severe challenges to structural stability when traversing complex geological conditions, particularly sections with asymmetric pressure or risk of bedding-parallel landslides. The asymmetric pressure side typically refers to the tunnel structure bearing significant earth or rock pressure from one side; while the bedding-parallel side refers to the sidewall where the rock strata dip roughly in line with the tunnel excavation face. This side is highly susceptible to bedding-parallel sliding or collapse due to insufficient interlayer cohesion. These two types of geological problems often coexist, significantly increasing the difficulty of tunnel support design and construction.

[0003] Currently, traditional reinforcement methods for addressing such problems mainly include combined support using steel arch frames and shotcrete, or the addition of anchor bolts and cables. However, these conventional methods have many limitations. First, traditional support structures are limited in form and cannot provide differentiated support for the different mechanical needs on both sides of the tunnel. Second, and most notably, due to the unevenness of the tunnel excavation face and the structural differences of various curved plates, there are often height deviations and spatial misalignments at the connection interfaces between adjacent curved plates. Existing connection methods mostly use rigid bolt connections or height-fixed clamps, lacking effective three-dimensional adjustment capabilities, resulting in difficulties in aligning connection plates, misaligning installation holes, and installing anchor bolts. This not only significantly reduces construction efficiency but also easily generates assembly stress at the connection points, creating weak points in the structure and affecting the reliability and safety of the overall support. Therefore, there is an urgent need in this field for a new type of tunnel reinforcement structure that can achieve differentiated support and adaptively adjust connection deviations. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a tunnel reinforcement structure that enables differentiated support and adaptive adjustment of connection deviations.

[0005] To achieve the above objectives, this utility model provides a tunnel reinforcement structure, comprising:

[0006] A corrugated arc-shaped steel plate is installed on the layer-in-line side of the tunnel, and adjacent corrugated arc-shaped steel plates are connected by a first connecting assembly.

[0007] A grid-type arc-shaped steel plate is installed on the reverse bias side of the tunnel, and adjacent grid-type arc-shaped steel plates are connected by a second connecting component; adjacent corrugated arc-shaped steel plates and grid-type arc-shaped steel plates are connected by a third connecting component.

[0008] The first connecting component, the second connecting component, and the third connecting component all include a connecting plate and a height adjusting component. One end of the connecting plate is installed on one side of the corrugated arc steel plate or the grid-type arc steel plate through the height adjusting component to adjust the position and height of the connecting plate. The connecting plate is provided with a mounting through hole.

[0009] The adjacent connecting plates are partially overlapped, and the mounting through holes in the overlapping areas are concentrically aligned;

[0010] An anchor bolt, which passes through the overlapping mounting holes, has one end deeply embedded in the tunnel rock strata and the other end fixed to the outermost connecting plate by a locking component.

[0011] This setup, by installing corrugated arc-shaped steel plates on the tunnel's layer-following side and grid-type arc-shaped steel plates on the opposite-biased side, and flexibly adjusting the specific height of the connecting plates using height adjustment components, effectively compensates for height deviations caused by uneven installation foundations or structural differences between adjacent arc-shaped steel plates. This ensures that the mating surfaces of the connecting plates are flush and the mounting holes are aligned. It achieves rapid and reliable connection and fixing between different types of arc-shaped steel plates, ultimately realizing differentiated support and adaptive connection adjustment for asymmetric geological conditions.

[0012] Furthermore, the height adjustment component includes an adjustment screw and an adjustment nut. The adjustment screw is fixedly installed on the corrugated arc-shaped steel plate or the grid-type arc-shaped steel plate, and the connecting plate is slidably sleeved on the adjustment screw and clamped and fixed by at least two adjustment nuts.

[0013] The height of the adjusting screw is greater than twice the sum of the height of the connecting plate and the total height of the adjusting nuts used to clamp the two connecting plates.

[0014] Furthermore, the locking component includes a locking nut and a spring washer. The locking nut is threaded onto the anchor rod, and the spring washer is sleeved on the anchor rod and located between the outermost connecting plate and the locking nut.

[0015] Furthermore, the corrugated arc-shaped steel plate is installed in the low-stress section of the tunnel inner wall;

[0016] The grid-type arc-shaped steel plate is installed in the high-stress section of the tunnel inner wall and is alternated with the corrugated arc-shaped steel plate.

[0017] Furthermore, the corrugated arc-shaped steel plate is provided with a plurality of reinforcing ribs, the extension direction of which is consistent with the corrugation direction of the corrugated arc-shaped steel plate.

[0018] Furthermore, the corrugated arc-shaped steel plate is provided with grouting through holes for injecting grout between the tunnel inner wall and the corrugated arc-shaped steel plate.

[0019] Furthermore, the grid-type arc-shaped steel plate includes multiple parallel first arc-shaped steel plates and multiple parallel second arc-shaped steel plates, with the second arc-shaped steel plates perpendicularly intersecting the first arc-shaped steel plates to form multiple grid cavities.

[0020] Furthermore, the second arc-shaped steel plate is provided with a plurality of first insertion slots along its length direction, and the first arc-shaped steel plate is provided with a plurality of second insertion slots along its length direction.

[0021] The first arc-shaped steel plate and the second arc-shaped steel plate are fixed to each other by interlocking through the first interlocking slot and the second interlocking slot.

[0022] Furthermore, it also includes a mounting frame, which is fixedly sleeved on the outer periphery of the grid-type arc-shaped steel plate composed of the first arc-shaped steel plate and the second arc-shaped steel plate, in order to enhance its overall rigidity.

[0023] Furthermore, the grid-type arc-shaped steel plate is configured as an integrally formed perforated steel plate.

[0024] The beneficial effects of this embodiment are as follows:

[0025] This invention utilizes corrugated arc-shaped steel plates installed on the tunnel's layer-following side and grid-type arc-shaped steel plates installed on the opposite-biased side. The height of the connecting plates is flexibly adjusted using height adjustment components, effectively compensating for height deviations caused by uneven installation foundations or structural differences between adjacent arc-shaped steel plates. This ensures that the mating surfaces of the connecting plates are flush and the mounting holes are aligned. It achieves rapid and reliable connection and fixing between different types of arc-shaped steel plates, ultimately enabling differentiated support and adaptive connection adjustment for asymmetric geological conditions. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the tunnel reinforcement structure according to an embodiment of the present utility model;

[0027] Figure 2 This is a structural diagram of adjacent connecting components in the tunnel reinforcement structure according to an embodiment of the present utility model;

[0028] Figure 3 This is a partial structural diagram of Embodiment 1 of the tunnel reinforcement structure of this utility model;

[0029] Figure 4 This is a schematic diagram of the second embodiment of the tunnel reinforcement structure of this utility model.

[0030] Among them, corrugated arc steel plate 1 and grouting through hole 11;

[0031] 2. Perforated steel plate; 21. Mounting frame; 22. First arc-shaped steel plate; 23. Second arc-shaped steel plate; 24. First insertion slot; 25. Second insertion slot; 26. Clip;

[0032] Anchor bolt 3, lock nut 31, spring washer 32;

[0033] Connecting plate 4, mounting through hole 41, adjusting screw 42, adjusting nut 43;

[0034] Tunnel 5. Detailed Implementation

[0035] The specific embodiments of this utility model will be described in detail below. It should be noted that the embodiments described herein are for illustrative purposes only and are not intended to limit the utility model. In the following description, numerous specific details are set forth in order to provide a thorough understanding of this utility model. However, it will be apparent to those skilled in the art that these specific details are not necessary to implement this utility model. In other instances, well-known circuits, software, or methods have not been specifically described in order to avoid obscuring the utility model.

[0036] Throughout this specification, references to "an embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "in an embodiment," "in an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in any suitable combination and / or sub-combination in one or more embodiments or examples. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale.

[0037] Please see Figure 1This utility model provides an embodiment of a tunnel reinforcement structure, comprising: a corrugated arc-shaped steel plate 1, which is installed on the layer-in-line side of the tunnel 5, and adjacent corrugated arc-shaped steel plates 1 are connected by a first connecting component; a grid-type arc-shaped steel plate, which is installed on the reverse bias side of the tunnel 5, and adjacent grid-type arc-shaped steel plates are connected by a second connecting component; and adjacent corrugated arc-shaped steel plates 1 and grid-type arc-shaped steel plates are connected by a third connecting component; the first connecting component, the second connecting component, and the third connecting component all include... The system includes a connecting plate 4 and a height adjustment component. One end of the connecting plate 4 is installed on one side of the corrugated arc-shaped steel plate 1 or the grid-type arc-shaped steel plate via the height adjustment component to adjust the position and height of the connecting plate 4. The connecting plate 4 has an installation through hole 41. Adjacent connecting plates 4 are partially overlapped, and the installation through holes 41 in the overlapping area are concentrically aligned. The system also includes an anchor rod 3, which passes through the overlapping installation through holes 41. One end of the anchor rod 3 is deeply embedded in the rock strata of tunnel 5, and the other end is fixed to the outermost connecting plate 4 via a locking component. On the reverse bias side, due to the thicker overburden, steeper terrain, or external structures on one side of tunnel 5, the surrounding rock on that side tends to move and collapse into the tunnel. This pressure is continuous, stable, and typically very large. The cavity of the grid-type structure can be designed to allow a certain degree of controllable deformation, continuously providing support during deformation, gradually releasing the surrounding rock stress, and preventing collapse due to excessive rigidity. Simultaneously, the grid cavity in the grid-type arc-shaped steel plate provides a natural channel for subsequent grouting reinforcement. The grout can fully fill the gaps behind the plate, reinforcing the surrounding rock and integrating the grid-type arc steel plate with the surrounding rock, greatly enhancing the support effect. The corrugated arc steel plate 1 installed on the bedding side also possesses a certain degree of flexibility and deformation capacity due to its corrugated structure, allowing for better coordination with the deformation of the surrounding rock. This achieves the support effect while reducing costs and realizing differentiated support. During installation, each corrugated arc steel plate 1 and grid-type arc steel plate is installed according to the actual situation. Then, adjacent connecting plates 4 are overlapped to facilitate the passage and fixation of the anchor bolts 3. When overlapping the connecting plates 4, the height of each connecting plate 4 is adjusted using height adjustment components to create a height difference between adjacent connecting plates 4, facilitating the alignment of the overlapping through holes 41. Furthermore, the height adjustment components allow for flexible adjustment of the specific height of each connecting plate 4, enabling rapid and effective connection and fixation of any corrugated arc steel plate 1 or grid-type arc steel plate, achieving a modular assembly connection effect while effectively avoiding the problem of support safety being affected by assembly stress.

[0038] Please see Figure 2In this embodiment, the height adjustment component includes an adjusting screw 42 and adjusting nuts 43. The adjusting screw 42 is fixedly installed on the corrugated arc-shaped steel plate 1 or the grid-type arc-shaped steel plate. The connecting plate 4 is slidably sleeved on the adjusting screw 42 and clamped and fixed by at least two adjusting nuts 43. In this embodiment, two adjusting nuts 43 are selected. The height of the adjusting screw 42 is greater than the sum of the height of the two connecting plates 4 and the total height of the adjusting nuts 43 used to clamp the two connecting plates 4. It is ensured that the connecting plate 4 can be adjusted in height normally. At the same time, the adjusting nuts 43 at both ends of the connecting plate 4 are used to fix the connecting plate 4 on the adjusting screw 42 to prevent the connecting plate 4 from sliding freely along the adjusting screw 42 and to avoid affecting the stability of the installation. During construction, the height of adjacent corrugated arc-shaped steel plates 1 or grid-type arc-shaped steel plates can also be adjusted by adjusting the height spacing of adjacent connecting plates 4, which facilitates the alignment of adjacent corrugated arc-shaped steel plates 1 or grid-type arc-shaped steel plates.

[0039] Please see Figure 1 In this embodiment, the locking component includes a locking nut 31 and a spring washer 32. The locking nut 31 is threaded onto the anchor rod 3, and the spring washer 32 is fitted onto the anchor rod 3 and located between the outermost connecting plate 4 and the locking nut 31. When the locking nut 31 is tightened, the spring washer 32 is compressed and deformed, generating a preload. When the anchor rod 3 is subjected to vibration or external impact, this preload can maintain a certain pressure on the nut, preventing it from loosening. Simultaneously, over time and with changes in the usage environment, the connection points of the anchor rod 3 may experience loosening, creep, or other phenomena, leading to a decrease in preload. The elasticity of the spring washer 32 can automatically compensate for this loosening, maintaining a certain preload.

[0040] In this embodiment, the corrugated arc-shaped steel plate 1 is provided with several reinforcing ribs, the extension direction of which is consistent with the corrugation direction of the corrugated arc-shaped steel plate 1. The reinforcing ribs improve bending resistance, shear resistance, and structural stability; simultaneously, the arrangement of the reinforcing ribs along the corrugation direction further optimizes the stress transmission path. When external force is applied to the corrugated arc-shaped steel plate 1, the stress is distributed more evenly along the corrugation and reinforcing rib directions, avoiding excessive local stress, reducing stress concentration and its destructive effect on the corrugated arc-shaped steel plate 1, and improving the overall load-bearing capacity of the structure.

[0041] Please see Figure 1 In this embodiment, the corrugated arc-shaped steel plate 1 is provided with grouting through holes 11 for injecting grout between the inner wall of the tunnel 5 and the corrugated arc-shaped steel plate 1. During construction, grout can be quickly injected between the inner wall of the tunnel 5 and the corrugated arc-shaped steel plate 1 through the grouting through holes 11 to complete the concrete pouring. At the same time, the grouting through holes 11 can make the concrete poured on both sides of the corrugated arc-shaped steel plate 1 form a whole, improving its integrity and enhancing the structural rigidity.

[0042] Example 1 of a grating-type curved steel plate:

[0043] Please see Figure 1 and Figure 3 In this embodiment, the grid-type arc-shaped steel plate includes multiple parallel first arc-shaped steel plates 22 and multiple parallel second arc-shaped steel plates 23. The second arc-shaped steel plates 23 are perpendicularly connected to the first arc-shaped steel plates 22 to form multiple grid cavities. The intersecting arc-shaped steel plates support each other, forming a stable spatial force system. Loads (such as pressure and impact) can be quickly transmitted and dispersed to the surroundings through the crisscrossing steel plate network, avoiding stress concentration. At the same time, the grid-type arc-shaped steel plate, like an arch bridge, can efficiently convert vertical loads into axial pressure along the arc surface of the steel plate, thereby greatly improving the load-bearing capacity and deformation resistance (stiffness) of the structure. Moreover, because it is perpendicularly intersecting, it has equal resistance in two mutually perpendicular directions. This means that the structure can effectively cope with forces from either direction, and its stability is far superior to that of a unidirectional plate or beam.

[0044] Please see Figure 3 In this embodiment, the second arc-shaped steel plate 23 has multiple first insertion slots 24 along its length, and the first arc-shaped steel plate 22 has multiple second insertion slots 25 along its length. The first arc-shaped steel plate 22 and the second arc-shaped steel plate 23 are interlocked and fixed together through the first insertion slots 24 and the second insertion slots 25. This simplifies the installation process, improves installation efficiency, and achieves modularization and prefabrication. Simultaneously, the interlocking connection provides a large contact area. When the structure is under stress, the force can be effectively transmitted between the interlocking steel plates through these tightly interlocking interfaces, forming a cohesive whole with superior mechanical properties compared to traditional spot welding or bolt connections. Furthermore, the interlocking slots create mutual constraints in three-dimensional space, which not only resist in-plane shear forces but also effectively prevent out-of-plane warping and dislocation of the steel plates, greatly enhancing the stability and fatigue resistance of the structure.

[0045] Please see Figure 1 In this embodiment, a mounting frame 21 is also included. The mounting frame 21 is fixedly sleeved on the outer periphery of the grid-like arc-shaped steel plate composed of the first arc-shaped steel plate 22 and the second arc-shaped steel plate 23 to enhance its overall rigidity. Adjusting screws are fixedly installed on the mounting frame 21. The mounting frame 21 achieves the effects of boundary constraint, instability prevention, collaborative work, and shared force, so that the first arc-shaped steel plate 22 and the second arc-shaped steel plate 23 form a more compact overall structure.

[0046] Please see Figure 1In this embodiment, the mounting frame 21 includes four mounting plates, each with a slot. Both ends of the first arc-shaped steel plate 22 and the second arc-shaped steel plate 23 are fixedly connected to slotted blocks 26. During installation, the slotted blocks 26 are inserted into the slots, thus fixing the first arc-shaped steel plate 22 and the second arc-shaped steel plate 23 to their respective mounting plates. After all the first arc-shaped steel plates 22 and the second arc-shaped steel plates 23 are connected to their respective mounting plates, adjacent mounting plates are then fixed together with screws or welded. In actual use, the mounting frame 21 can also be a single, integrated frame, with the ends of the first arc-shaped steel plates 22 and the second arc-shaped steel plates 23 directly welded to the mounting frame 21.

[0047] The specific usage method of this embodiment is as follows:

[0048] Before use, the first arc-shaped steel plate 22 and the second arc-shaped steel plate 23 are first snapped together through the first insertion slot 24 and the second insertion slot 25. Then, the locking blocks 26 at both ends of the first arc-shaped steel plate 22 and the second arc-shaped steel plate 23 are snapped into the corresponding slots. Finally, the adjacent mounting plates are welded together to complete the installation of the grid-type arc-shaped steel plate.

[0049] During use, the installation positions of each corrugated arc steel plate 1 and the grid-type arc steel plate should be determined in advance based on the stress conditions of the inner wall of tunnel 5. During installation, the corrugated arc steel plate 1 and the grid-type arc steel plate can be simply fixed to the inner wall of tunnel 5 with screws first to facilitate subsequent operations.

[0050] After the corrugated arc steel plates 1 and the grid-type arc steel plates are initially fixed, the height of the adjacent connecting plates 4 is adjusted to create a height difference between them. The connecting plates 4 are then fixed using the adjusting nuts 43 at both the top and bottom to prevent them from moving arbitrarily along the adjusting screws 42. Next, the anchor rods 3 are inserted deep into the rock strata of the tunnel 5 through the installation through holes 41 on the connecting plates 4. The anchor rods 3 are then fixed using locking nuts 31 and spring washers 32. Finally, concrete is injected through the grouting through holes 11 on the corrugated arc steel plates 1 and into the cavities of the grid-type arc steel plates, making the concrete poured on both sides of the corrugated arc steel plates 1 and the grid-type arc steel plates form a unified whole, thus making the installation of the anchor rods 3, corrugated arc steel plates 1, and grid-type arc steel plates more stable.

[0051] Example 2 of a grid-type curved steel plate:

[0052] Please see Figure 4 In this embodiment, the grille-type arc-shaped steel plate is configured as an integrally formed perforated steel plate 2. This facilitates rapid installation, provides extremely high integrity and structural reliability, and eliminates connection weaknesses.

[0053] The specific usage method of this embodiment is as follows:

[0054] During use, the installation positions of each corrugated arc steel plate 1 and the grid-type arc steel plate should be determined in advance based on the stress conditions of the inner wall of tunnel 5. During installation, the corrugated arc steel plate 1 and the grid-type arc steel plate can be simply fixed to the inner wall of tunnel 5 with screws first to facilitate subsequent operations.

[0055] After the corrugated arc steel plates 1 and the grid-type arc steel plates are initially fixed, the height of the adjacent connecting plates 4 is adjusted to create a height difference between them. The connecting plates 4 are then fixed using the adjusting nuts 43 at both the top and bottom to prevent them from moving arbitrarily along the adjusting screws 42. Next, the anchor rods 3 are inserted deep into the rock strata of the tunnel 5 through the installation through holes 41 on the connecting plates 4. The anchor rods 3 are then fixed using locking nuts 31 and spring washers 32. Finally, concrete is injected through the grouting through holes 11 on the corrugated arc steel plates 1 and into the cavities of the grid-type arc steel plates, making the concrete poured on both sides of the corrugated arc steel plates 1 and the grid-type arc steel plates form a unified whole, thus making the installation of the anchor rods 3, corrugated arc steel plates 1, and grid-type arc steel plates more stable.

[0056] In summary, this invention, by installing a corrugated arc-shaped steel plate 1 on the layer-in-line side of tunnel 5 and a grid-type arc-shaped steel plate on the opposite-biased side, and by using height adjustment components to flexibly adjust the specific height of the connecting plate 4, effectively compensates for height deviations caused by uneven installation foundations or differences in their own structures between adjacent arc-shaped steel plates, ensuring that the mating surfaces of the connecting plates are flush and the mounting holes are aligned; it achieves rapid and reliable connection and fixing between different types of arc-shaped steel plates, ultimately achieving differentiated support and adaptive connection adjustment for asymmetric geological conditions. Therefore, this invention effectively overcomes the various shortcomings of the prior art.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A tunnel reinforcement structure, characterized in that, include: A corrugated arc-shaped steel plate is installed on the layer-in-line side of the tunnel, and adjacent corrugated arc-shaped steel plates are connected by a first connecting assembly. A grid-type arc-shaped steel plate is installed on the reverse bias side of the tunnel, and adjacent grid-type arc-shaped steel plates are connected by a second connecting component; adjacent corrugated arc-shaped steel plates and grid-type arc-shaped steel plates are connected by a third connecting component. The first connecting component, the second connecting component, and the third connecting component all include a connecting plate and a height adjusting component. One end of the connecting plate is installed on one side of the corrugated arc steel plate or the grid-type arc steel plate through the height adjusting component to adjust the position and height of the connecting plate. The connecting plate is provided with a mounting through hole. The adjacent connecting plates are partially overlapped, and the mounting through holes in the overlapping areas are concentrically aligned; An anchor bolt, which passes through the overlapping mounting holes, has one end deeply embedded in the tunnel rock strata and the other end fixed to the outermost connecting plate by a locking component.

2. The tunnel reinforcement structure according to claim 1, characterized in that: The height adjustment component includes an adjustment screw and an adjustment nut. The adjustment screw is fixedly installed on the corrugated arc steel plate or the grid-type arc steel plate. The connecting plate is slidably sleeved on the adjustment screw and clamped and fixed by at least two adjustment nuts. The height of the adjusting screw is greater than twice the sum of the height of the connecting plate and the total height of the adjusting nuts used to clamp the two connecting plates.

3. The tunnel reinforcement structure according to claim 1, characterized in that: The locking component includes a locking nut and a spring washer. The locking nut is threaded onto the anchor rod, and the spring washer is sleeved on the anchor rod and located between the outermost connecting plate and the locking nut.

4. The tunnel reinforcement structure according to claim 1, characterized in that: The corrugated arc-shaped steel plate is provided with a number of reinforcing ribs, and the extension direction of the reinforcing ribs is consistent with the corrugation direction of the corrugated arc-shaped steel plate.

5. The tunnel reinforcement structure according to claim 1, characterized in that: The corrugated arc-shaped steel plate is provided with grouting through holes for injecting grout between the tunnel inner wall and the corrugated arc-shaped steel plate.

6. The tunnel reinforcement structure according to claim 1, characterized in that: The grid-type arc-shaped steel plate includes multiple parallel first arc-shaped steel plates and multiple parallel second arc-shaped steel plates. The second arc-shaped steel plates are perpendicularly connected to the first arc-shaped steel plates to form multiple grid cavities.

7. The tunnel reinforcement structure according to claim 6, characterized in that: The second arc-shaped steel plate is provided with a plurality of first insertion slots along its length, and the first arc-shaped steel plate is provided with a plurality of second insertion slots along its length. The first arc-shaped steel plate and the second arc-shaped steel plate are fixed to each other by interlocking through the first interlocking slot and the second interlocking slot.

8. The tunnel reinforcement structure according to claim 7, characterized in that: It also includes a mounting frame, which is fixedly sleeved on the outer periphery of the grid-type arc-shaped steel plate composed of the first arc-shaped steel plate and the second arc-shaped steel plate, in order to enhance its overall rigidity.

9. The tunnel reinforcement structure according to claim 1, characterized in that: The grid-type arc-shaped steel plate is configured as an integrally formed perforated steel plate.

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