Tunnel secondary lining void steel belt reinforcing structure and tunnel secondary lining surface applying same

Abstract

The utility model relates to the technical field of tunnel lining defect renovation, and provides a tunnel second lining void steel belt reinforcing structure which comprises annular steel belts arranged on the tunnel lining wall face at intervals in the length direction of a tunnel, and each annular steel belt comprises a plurality of arc-shaped steel plates. The arc-shaped steel plates are connected into an integral annular steel belt through connecting assemblies; a plurality of connecting holes are formed in the annular steel belt, fixing assemblies are arranged in the connecting holes, and the annular steel belt is arranged on the wall face of the tunnel lining through the fixing assemblies; a glue injection opening is formed in the arc-shaped steel plate in a penetrating manner, and a sealing cover is detachably arranged in the glue injection opening; a connecting layer is arranged on the face, close to the lining wall, of the annular steel belt, and a sticky steel glue layer is arranged between the connecting layer and the lining wall face of the tunnel. According to the tunnel lining, surface unfavorable tensile stress caused by void of the lining can be reduced, surface cracking, chipping and other diseases are avoided, the bearing capacity and the shock resistance of the tunnel lining can be effectively enhanced, and the safety and the stability of a tunnel are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel lining defect rectification, in particular to a steel strip reinforcement structure for the void between the second lining of a tunnel and its application to the surface of the second lining of the tunnel. Background Technique

[0002] Tunnels are an important part of the highway transportation system, and the stability and safety of tunnel linings are important guarantees for transportation safety. However, due to the influence of concrete materials and construction during the lining pouring process, voids are likely to occur between the lining and the backfill. The voids not only change the stress state of the lining, causing cracking of the lining and affecting the bearing capacity and service life of the lining, but the void cavities may also accumulate moisture, leading to more serious lining deterioration and seriously threatening the stability and safety of the tunnel.

[0003] Therefore, in view of the above problems, a steel strip reinforcement structure for the void between the second lining of a tunnel is proposed to solve the above problems. Content of the Utility Model

[0004] In view of the deficiencies of the prior art, the utility model develops a steel strip reinforcement structure for the void between the second lining of a tunnel. This utility model can reduce the adverse tensile stress on the surface of the lining caused by the void, avoid diseases such as surface cracking and spalling, and can effectively enhance the bearing capacity and seismic resistance of the tunnel lining, improving the safety and stability of the tunnel.

[0005] To achieve the above object, the utility model provides a steel strip reinforcement structure for the void between the second lining of a tunnel, which includes circumferential steel strips arranged at intervals along the length direction of the tunnel on the inner lining wall surface of the tunnel. Each circumferential steel strip includes several arc-shaped steel plates, and the radian of the arc-shaped steel plates is consistent with the radian of the tunnel cross-section. The arc-shaped steel plates are connected into an integral circumferential steel strip through a connection component; several connection holes are opened on the circumferential steel strip, and a fixing component is arranged in the connection holes, and the circumferential steel strip is arranged on the inner lining wall surface of the tunnel through the fixing component; injection ports are penetrated on the arc-shaped steel plates, and sealing covers are detachably arranged in the injection ports; a connection layer is arranged on the surface of the circumferential steel strip close to the lining wall, and a steel-bonding adhesive layer is arranged between the connection layer and the inner lining wall surface of the tunnel.

[0006] Preferably, a galvanized layer is arranged on the surface of the arc-shaped steel plate away from the lining wall, and the thickness of the galvanized layer is not less than 600 , the thickness of the arc-shaped steel plate is not less than 12 mm, and the width is not less than 300 mm.

[0007] Preferably, the connection layer includes several wedge-shaped plates with rough surfaces, which are arranged on the arc-shaped steel plates along the length direction of the arc-shaped steel plates.

[0008] Preferably, slots and plugs are respectively arranged at both ends of the arc-shaped steel plate. The slots and plugs of adjacent two arc-shaped steel plates can be inserted into each other, and shaft holes are formed in the slots and plugs along the width direction of the arc-shaped steel plate.

[0009] Preferably, the connecting component includes a connecting shaft and a connecting plate. The connecting shaft is arranged in the shaft hole for connecting the slot and the plug. The connecting plate covers the gap where the slot and the plug are connected and is bonded to the arc-shaped steel plate through adhesive.

[0010] Preferably, the fixing component includes fixing anchor bolts, gaskets and fasteners. One end of the fixing anchor bolt is arranged in the lining wall of the tunnel, and the other end of the fixing anchor bolt is used to pass through the connecting holes on the circumferential steel belt. A gasket is sleeved on the fixing anchor bolt between the circumferential steel belt and the lining wall of the tunnel, and a fastener is arranged on the fixing anchor bolt on the side of the circumferential steel belt away from the lining wall of the tunnel to prevent the circumferential steel belt from falling off the fixing anchor bolt.

[0011] Preferably, through holes are formed in the connecting plate corresponding to the connecting holes, and the through holes and their corresponding connecting holes are connected through fixing anchor bolts.

[0012] Preferably, a sealing strip is further included, which is arranged around the side of the circumferential steel belt between the circumferential steel belt and the lining wall of the tunnel to form a cavity between the circumferential steel belt and the lining wall of the tunnel.

[0013] The present utility model also provides a second lining surface of a tunnel, which includes the steel belt reinforcement structure as described above, and further includes an arch part and an inverted arch part. Both the arch part and the inverted arch part are concrete layers. The arch part is located at the top of the tunnel, and the inverted arch part is located at the bottom of the tunnel. The arch part and the inverted arch part are connected to jointly form a casting body with an annular cross-section. The arch part includes a shotcrete layer and a cast-in-place concrete layer. A waterproof layer is arranged between the shotcrete layer and the cast-in-place concrete layer. A plurality of anchoring holes are arranged on the inner side of the cast-in-place concrete layer away from the shotcrete layer. The number and distance of the anchoring holes correspond to the number and distance of the connecting holes on the circumferential steel belt. Fixing anchor bolts are arranged in the anchoring holes; a carbon fiber cloth is further arranged on the inner side surface of the cast-in-place concrete layer away from the shotcrete layer below the void position of the second lining of the tunnel. The carbon fiber cloth is adhered to the surface of the lining wall of the tunnel through carbon fiber impregnating glue, and the carbon fiber cloth is arranged in a crosswise and longitudinal manner, and the circumferential steel belt and the steel bonding glue layer are used to partially press the carbon fiber cloth.

[0014] Preferably, the waterproof layer includes a geotextile and a waterproof coiled material. The geotextile is arranged on the inner wall of the shotcrete layer close to the cast-in-place concrete layer, and the waterproof coiled material is adhered to the side surface of the geotextile close to the cast-in-place concrete layer through waterproof glue.

[0015] The effects provided in the utility model content are only the effects of the embodiments, rather than all the effects of the utility model. The above technical solutions have the following advantages:

[0016] 1. The utility model improves the practicability by setting a plurality of arc-shaped steel plates, which are connected into an integral circumferential steel belt through a connecting component. Compared with the integral circumferential steel belt, it has better flexibility, simple processing and convenient transportation.

[0017] 2. By setting a connecting layer, the utility model increases the connecting area between the surface of the circumferential steel belt and the bonding agent layer between the lining wall in the tunnel, thereby enhancing the connecting strength and improving the stability of the installation of the circumferential steel belt and the construction safety.

[0018] 3. By setting a glue injection port and a sealing strip, the sealing strip is arranged around the side of the circumferential steel belt to form a cavity between the circumferential steel belt and the lining wall in the tunnel. Then, open the glue injection ports on the arc-shaped steel plates at the bottom of both sides and the top of the circumferential steel belt, inject glue from the glue injection ports at the bottom of both sides, block the glue injection port at the top after the glue overflows, and then continue to inject glue for a period of time to prevent the bonding agent layer from being voided, improving the stability and construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings are used to provide a further understanding of the utility model and constitute a part of the specification. They are used together with the embodiments of the utility model to explain the utility model and do not constitute a limitation to the utility model.

[0020] Figure 1 It is a schematic cross-sectional view of the tunnel where the steel belt reinforcement structure of the embodiment of the utility model is installed in the tunnel;

[0021] Figure 2 It is a schematic diagram of the laying position of the carbon fiber cloth of the embodiment of the utility model;

[0022] Figure 3 It is a partial cross-sectional structure schematic diagram of the steel belt reinforcement structure used in the embodiment of the utility model;

[0023] Figure 4 It is a schematic diagram of the connection of the arc-shaped steel plates of the embodiment of the utility model;

[0024] Figure 5 It is a schematic diagram of the position of the wedge-shaped plate of the embodiment of the utility model.

[0025] In the figure: 1. Circumferential steel belt; 2. Arc-shaped steel plate; 3. Connecting component; 4. Fixing component; 5. Connecting layer; 6. Bonding agent layer; 7. Sealing strip; 8. Shotcrete layer; 9. Cast-in-place concrete layer; 10. Waterproof layer; 11. Anchor hole; 12. Carbon fiber cloth; 101. Connecting hole; 201. Glue injection port; 202. Sealing cover; 203. Slot; 204. Insert block; 205. Shaft hole; 301. Connecting shaft; 302. Connecting plate; 303. Through hole; 401. Fixed anchor bolt; 402. Gasket; 403. Fastener; 501. Wedge-shaped plate. Detailed implementation mode

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0027] Embodiment 1

[0028] As Figures 1 - 5 shown, a tunnel secondary lining void steel strip reinforcement structure includes a circumferential steel strip 1, which is arranged on the inner lining wall surface of the tunnel at intervals along the length direction of the tunnel below the detected void position. Each circumferential steel strip 1 includes several arc-shaped steel plates 2, and the radian of the arc-shaped steel plates 2 is set to be consistent with the radian of the tunnel cross-section. The arc-shaped steel plates 2 are connected into an integral circumferential steel strip 1 through a connecting component 3; several connecting holes 101 are opened on the circumferential steel strip 1. Preferably, the connecting holes 101 are arranged in a uniform array. A fixing component 4 is arranged in the connecting holes 101, and the circumferential steel strip 1 is arranged on the inner lining wall surface of the tunnel through the fixing component 4; a glue injection port 201 is penetrated through the arc-shaped steel plate 2, and a sealing cover 202 is detachably arranged in the glue injection port 201. Preferably, the sealing cover 202 is threadedly connected with the glue injection port 201; a connecting layer 5 is arranged on the surface of the circumferential steel strip 1 close to the lining wall, and a steel bonding glue layer 6 is arranged between the connecting layer 5 and the inner lining wall surface of the tunnel to improve the connection strength.

[0029] In this embodiment, the arc-shaped steel plate 2 is made of Q235 hot-rolled steel. A galvanized layer is arranged on the surface of the arc-shaped steel plate 2 away from the lining wall, and the thickness of the galvanized layer is not less than 600 , to improve the rust prevention ability of the arc-shaped steel plate 2. The thickness of the arc-shaped steel plate 2 is not less than 12 mm, and the width is not less than 300 mm, to avoid insufficient strength of the arc-shaped steel plate 2 and improve the stability and safety of the support.

[0030] In this embodiment, the connecting layer 5 includes several wedge-shaped plates 501 with rough surfaces, which are arranged on the plate surface of the arc-shaped steel plate 2 at intervals along the length direction of the arc-shaped steel plate 2. The narrow ends of the wedge-shaped plates 501 face the inner lining wall of the tunnel, and the height of the wedge-shaped plates 501 is less than the thickness of the steel bonding glue layer 6, to avoid voids during glue injection and improve the firmness and stability of the connection.

[0031] In this embodiment, slots 203 and plugs 204 are respectively arranged at both ends of the arc-shaped steel plate 2. The slots 203 and plugs 204 of adjacent arc-shaped steel plates 2 can be inserted into each other, which facilitates quick positioning and connection during construction, improves construction efficiency, and axial holes 205 are formed in both the slots 203 and plugs 204 along the width direction of the arc-shaped steel plate 2; the connecting component 3 includes a connecting shaft 301 and a connecting plate 302. The connecting shaft 301 is arranged in the axial hole 205 to connect the slot 203 and the plug 204, making the connection more stable and preventing the separation of the slot 203 and the plug 204. The connecting plate 302 covers the gap where the slot 203 and the plug 204 are connected and is adhesively bonded to the arc-shaped steel plate 2 with glue to prevent the uncured glue from overflowing from the gap during glue injection, thus improving the practicability.

[0032] In this embodiment, the fixing component 4 includes fixing anchor bolts 401, gaskets 402 and fasteners 403. The fixing anchor bolts 401 can be chemical anchor bolts. One end of the fixing anchor bolt 401 is arranged inside the lining wall of the tunnel, and the other end of the fixing anchor bolt 401 is used to pass through the connection hole 101 on the circumferential steel strip 1. A gasket 402 is sleeved on the fixing anchor bolt 401 between the circumferential steel strip 1 and the lining wall of the tunnel. The gasket 402 is used to control the thickness of the steel-bonding glue layer 6. A fastener 403 is arranged on the fixing anchor bolt 401 on the side of the circumferential steel strip 1 away from the lining wall of the tunnel. The fastener 403 can be a nut. The position of the circumferential steel strip 1 is determined by the nut to prevent the circumferential steel strip 1 from falling off the fixing anchor bolt 401, thus improving the stability and economy.

[0033] In this embodiment, through holes 303 are formed in the connecting plate 302 corresponding to the connection holes 101, and the through holes 303 and their corresponding connection holes 101 are connected by fixing anchor bolts 401, and then the position is determined by fasteners 403, which improves the connection rigidity and support strength at the connection of the arc-shaped steel plates 2 and makes the overall support of the circumferential steel strip 1 better.

[0034] In this embodiment, a sealing strip 7 is further included, which is arranged around the side of the circumferential steel strip 1 between the circumferential steel strip 1 and the lining wall of the tunnel to form a cavity between the circumferential steel strip 1 and the lining wall of the tunnel. The sealing strip 7 can be made of rubber material. The thickness of the sealing strip 7 is greater than the preset thickness of the steel-bonding glue layer 6. Before the fastener 403 is tightened, it is arranged around the side of the circumferential steel strip 1 close to the lining wall of the tunnel. The tightening of the fastener 403 causes a certain deformation of the sealing strip 7 to apply a reverse force to both the circumferential steel strip 1 and the lining wall of the tunnel, making the position of the sealing strip 7 more stable. Preferably, the sealing strip 7 and the circumferential steel strip 1 and the lining wall of the tunnel can be further sealed with sealant to prevent the sealing strip 7 from coming out during glue injection, thus improving the construction efficiency and economy.

[0035] Embodiment Two

[0036] A secondary lining surface of a tunnel, as Figure 1 and Figure 2 shown, includes the steel strip reinforcement structure as described above, and also includes an arch part and an inverted arch part. Both the arch part and the inverted arch part are concrete layers. The arch part is located at the top of the tunnel, and the inverted arch part is located at the bottom of the tunnel. The arch part and the inverted arch part are connected to jointly form a casting body with an annular cross-section. The arch part includes a shotcrete layer 8 and a cast-in-place concrete layer 9. A waterproof layer 10 is arranged between the shotcrete layer 8 and the cast-in-place concrete layer 9. A plurality of anchoring holes 11 are arranged on the inner side of the cast-in-place concrete layer 9 away from the shotcrete layer 8. The quantity and position distance of the anchoring holes 11 correspond to the quantity and position distance of the connecting holes 101 on the circumferential steel strip 1. Fixing bolts 401 are arranged in the anchoring holes 11 to connect the circumferential steel strip 1; a carbon fiber cloth 12 is also arranged on the inner side surface of the cast-in-place concrete layer 9 away from the shotcrete layer 8 below the void position of the secondary lining of the tunnel, which is used to cooperate with the steel strip reinforcement structure to further support this position. The carbon fiber cloth 12 is arranged in a strip shape and is adhered to the surface of the inner lining wall of the tunnel through carbon fiber impregnation adhesive. Moreover, the carbon fiber cloth 12 is arranged in a crosswise and longitudinal direction. Preferably, both the crosswise and longitudinal arrangements of the carbon fiber cloth 12 are not parallel to the tunnel length direction to improve the support capacity. The circumferential steel strip 1 and the steel-bonding adhesive layer 6 are used to press part of the carbon fiber cloth 12, improving the stability and safety.

[0037] In another alternative embodiment, the waterproof layer 10 includes a geotextile and a waterproof coiled material. The geotextile is arranged on the inner wall of the shotcrete layer 8 close to the cast-in-place concrete layer 9, and the waterproof coiled material is adhered to the side surface of the geotextile close to the cast-in-place concrete layer 9 through a waterproof adhesive, improving the practicability.

[0038] Embodiment Three

[0039] A method for reinforcing a void of a secondary lining of a tunnel using the above-mentioned steel strip reinforcement structure, and the specific steps are as follows:

[0040] Step 1: Circumferential steel strip assembly. The slots 203 and plugs 204 of adjacent arc-shaped steel plates 2 are inserted into each other and connected into a whole circumferential steel strip 1 through a connecting shaft 301.

[0041] Step 2: Concrete surface treatment. Grind the concrete bonding surface with a diamond blade until a new surface layer of sand and gravel is exposed.

[0042] Step 3: Set bolts. Layout and drill holes on the inner lining wall of the tunnel according to the preset positions of the fixing bolts 401. Set the bolts according to the construction technology and precautions of chemical bolts. After the bolt construction is completed, clean the dust on the concrete surface with clean water; then, a carbon fiber cloth 12 can be set on the inner lining wall of the tunnel below the void position. Preferably, the carbon fiber cloth 12 avoids the setting positions of the fixing bolts 401.

[0043] Step 4: Fix the circumferential steel strip. Lift the circumferential steel strip 1. The circumferential steel strip 1 should be staggered from the construction joint. Insert the connection hole 101 of the circumferential steel strip 1 into the corresponding fixed anchor bolt 401, and set a gasket 402 with a certain thickness on the fixed anchor bolt 401. Then set the fastener 403 so that the circumferential steel strip 1 will not fall off. Then surround the circumferential steel strip 1 with a sealing strip 7, and then tighten the fastener 403 to fix the position of the circumferential steel strip 1.

[0044] Step 5: Connect and reinforce the circumferential steel strip 1. Use an electric wire brush to polish the galvanized layer of the circumferential steel strip 1 at the joint outside the seam of the arc-shaped steel plate 2 and the connection plate 302. Then stick the connection plate 302 to the joint with glue, and make the through hole 303 on the connection plate 302 pass through the fixed anchor bolt 401, and use the fastener 403 to connect the connection plate 302 and the circumferential steel strip 1 more firmly.

[0045] Step 6: Prepare glue and inject glue. Prepare the steel bonding glue in a conventional manner, that is, epoxy resin binder. Then open the glue injection ports 201 at the bottommost positions at both ends of the circumferential steel strip 1 and the topmost position of the circumferential steel strip 1. Start injecting glue from the glue injection ports 201 at the bottommost positions on both sides. The glue liquid gradually advances towards the top of the tunnel, and when the glue comes out from the glue injection port 201 at the top, block the glue injection port 201 at the top with a sealing cover 202 while maintaining the injection pressure to prevent the glue layer from being void.

[0046] Step 7: Wait for curing. In the first few hours after the glue injection construction, pay attention to checking whether there is glue flowing phenomenon to prevent de-bonding. The curing time is not less than three days at normal temperature. When the curing temperature decreases, the curing time should be extended accordingly.

[0047] Step 8: Grout the voids in the lining. Grout the voids in the lining to ensure the structural stress stability and prevent possible impact loads.

[0048] The details not elaborated in the present utility model are all well-known conventional technical means in the art.

[0049] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0050] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0051] Although the embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

[0052] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A tunnel secondary lining hollow steel belt reinforcement structure, comprising an annular steel belt (1), which is arranged on the inner lining wall of the tunnel at intervals along the length direction of the tunnel, characterized in that: Each annular steel belt (1) comprises a plurality of arc-shaped steel plates (2), the curvature of the arc-shaped steel plates (2) being consistent with the curvature of the tunnel cross section, and the arc-shaped steel plates (2) are connected to form an integral annular steel belt (1) via a connecting assembly (3); A plurality of connection holes (101) are provided on the annular steel belt (1), and a fixing assembly (4) is arranged in the connection hole (101). The annular steel belt (1) is arranged on the lining wall surface in the tunnel through the fixing assembly (4); A glue injection port (201) is formed through the curved steel plate (2), and a sealing cover (202) is detachably disposed in the glue injection port (201); A connection layer (5) is arranged on the side of the annular steel belt (1) close to the lining wall, and a steel adhesive layer (6) is arranged between the connection layer (5) and the lining wall surface in the tunnel.

2. A tunnel secondary lining hollow steel belt reinforcement structure according to claim 1, characterized in that: A galvanized layer is provided on the side of the curved steel plate (2) away from the lining wall, and the thickness of the galvanized layer is not less than 600 The thickness of the arc-shaped steel plate (2) is not less than 12 mm, and the width is not less than 300 mm.

3. A tunnel secondary lining hollow steel belt reinforcement structure according to claim 2, characterized in that: The connection layer (5) comprises a plurality of wedge-shaped plates (501) with rough surfaces, which are arranged on the arc-shaped steel plate (2) along the length direction of the arc-shaped steel plate (2).

4. A tunnel secondary lining hollow steel belt reinforcement structure according to claim 3, characterized in that: A slot (203) and an insert block (204) are respectively arranged at both ends of the arc-shaped steel plate (2); the slots (203) and insert blocks (204) of two adjacent arc-shaped steel plates (2) can be plugged into each other, and an axial hole (205) is provided on the slot (203) and the insert block (204) along the width direction of the arc-shaped steel plate (2).

5. A tunnel secondary lining hollow steel belt reinforcement structure according to claim 4, characterized in that: The connection assembly (3) comprises a connection shaft (301) and a connection plate (302). The connection shaft (301) is arranged in the shaft hole (205) for connecting the slot (203) and the plug block (204). The connection plate (302) covers the gap between the slot (203) and the plug block (204) and is bonded to the arc-shaped steel plate (2) by adhesive.

6. A tunnel secondary lining hollow steel belt reinforcement structure according to claim 5, characterized in that: The fixing assembly (4) comprises a fixing anchor bolt (401), a gasket (402) and a fastener (403); one end of the fixing anchor bolt (401) is arranged in the tunnel lining wall; the other end of the fixing anchor bolt (401) is used to pass through the connection hole (101) on the annular steel belt (1); the gasket (402) is sleeved on the fixing anchor bolt (401) between the annular steel belt (1) and the tunnel lining wall; the fastener (403) is arranged on the fixing anchor bolt (401) on the side of the annular steel belt (1) away from the tunnel lining wall, so as to prevent the annular steel belt (1) from falling off the fixing anchor bolt (401).

7. A tunnel secondary lining hollow steel belt reinforcement structure according to claim 6, characterized in that: A through hole (303) is provided on the connecting plate (302) corresponding to the connecting hole (101), and the through hole (303) and the corresponding connecting hole (101) are connected via a fixing anchor bolt (401).

8. A tunnel secondary lining hollow steel belt reinforcement structure according to claim 7, characterized in that: It also includes a sealing strip (7) which surrounds the side of the annular steel strip (1) and is arranged between the annular steel strip (1) and the inner lining wall of the tunnel, and is used to form a cavity between the annular steel strip (1) and the inner lining wall of the tunnel.

9. A tunnel secondary lining, comprising the steel belt reinforcement structure according to claim 8, further comprising an arch portion and an inverted arch portion, both of which are concrete layers, the arch portion is located at the top of the tunnel, the inverted arch portion is located at the bottom of the tunnel, the arch portion and the inverted arch portion are connected to form a cast body with a circular cross section, the arch portion comprises a sprayed concrete layer (8) and a cast concrete layer (9), a waterproof layer (10) is arranged between the sprayed concrete layer (8) and the cast concrete layer (9), characterized in that: A plurality of anchor holes (11) are arranged on the inner side of the cast concrete layer (9) away from the shotcrete layer (8), the number and position of the anchor holes (11) correspond to the number and position of the connection holes (101) on the annular steel belt (1), and the anchor holes (11) are used to arrange fixing anchor bolts (401); a carbon fiber cloth (12) is arranged on the inner side of the cast concrete layer (9) away from the shotcrete layer (8) below the hollow position of the tunnel secondary lining, the carbon fiber cloth (12) is adhered to the surface of the tunnel lining wall by carbon fiber impregnation glue, and the carbon fiber cloth (12) is arranged crosswise in the horizontal and vertical directions, and the annular steel belt (1) and the steel adhesive layer (6) are used to partially compress the carbon fiber cloth (12).

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