Reinforcing device, tunnel reinforcing structure and construction method thereof

Abstract

The application discloses a reinforcing device, a tunnel reinforcing structure and a construction method thereof. The reinforcing device comprises a reinforcing structure unit body, the reinforcing structure unit body comprises a support body used for being connected in the circumferential direction of a region to be reinforced, the support body comprises support units which are arranged at intervals along the axial direction of the region to be reinforced, adjacent support units are connected through a membrane bag, and the membrane bag is provided with a grouting hole and an exhaust hole. The tunnel reinforcing structure adopts the reinforcing device. In the application, the support units and the stretchable grouting membrane bag are combined with each other, under the condition of meeting the tunnel clearance and the reinforcing strength, the effect of rapid reinforcing construction is achieved. The application has high reinforcing efficiency, good reinforcing effect, small occupied space and good structural stability.

Description

Technical Field

[0001] This invention relates to the field of tunnel reinforcement technology, and in particular to a reinforcement device, a tunnel reinforcement structure and its construction method. Background Technology

[0002] With the rapid development of tunnel construction, the service life of tunnels is constantly increasing. During tunnel operation, due to the combined effects of factors such as lining quality defects, variations in surrounding loads, deterioration of the external environment, and inadequate maintenance, tunnels will experience different states of deterioration that affect their service life or traffic safety, i.e., tunnel defects. Lining defects that do not significantly affect the lining's load-bearing capacity and safety performance only require routine maintenance, such as surface repair, caulking, and grouting. However, defects that cause a decline in the structural function of the lining require reinforcement and strengthening.

[0003] There are two main traditional methods for addressing the deformation of tunnel lining structures: one is to reinforce the soil around the tunnel, which mainly involves reinforcing the surrounding rock to reduce the stress on the lining. However, this method is time-consuming, has limited reinforcement effects, and requires pre-reserved grouting holes in the lining structure. The other method is to reinforce the internal structure of the tunnel. Commonly used methods include internal steel plate reinforcement and fiber cloth bonding. However, steel plate reinforcement is expensive and inefficient, while fiber cloth bonding has low compressive strength and requires high flatness and viscosity of the existing structure.

[0004] Therefore, different reinforcement methods have emerged in the existing technology. The main reinforcement methods are as follows:

[0005] Prior art 1: A flexible support and support method disclosed in Chinese invention patent application CN 105781596 A, published on July 20, 2016, includes a flexible support comprising a hose and a grouting port device; wherein the grouting port device is sealed to the end of the hose; the hose is equipped with an exhaust device; a tensile-resistant flexible wire is threaded through the cavity inside the hose, and the end of the tensile-resistant flexible wire is fixed to the grouting port device, or the two ends of the tensile-resistant flexible wire are connected together. The grouting body and the internal tensile-resistant flexible wire form a compressive-resistant structure. However, the internal compressive-resistant flexible wire is insufficient to improve the strength and rigidity of the grouting structure, and the grouting body is the main load-bearing element.

[0006] Prior Art 2: A prefabricated tunnel reinforcement structure unit disclosed in Chinese Utility Model Patent No. CN 216642135 U, with an authorization announcement date of May 31, 2022, includes several arc-shaped support profiles, a pair of support brackets, several arc-shaped connecting blocks, several expansion anchors, and several bolts. Several of the arc-shaped support profiles are connected sequentially through the arc-shaped connecting blocks and the bolts to form an open-loop support assembly that is close to a complete circle. The ends of the connected arc-shaped support profiles are connected to the support brackets through bolts, and the support brackets are installed on the concrete segments at the bottom layer of the tunnel through expansion anchors.

[0007] Prior Art 3: Japanese Patent Application No. JP2003148091A, published on May 21, 2003, discloses a reinforcement structure for existing tunnel linings. This structure involves arch segments arranged with narrow openings on the inner surface of the existing tunnel lining, interconnected axially by mating joints. The lower ends of the arch segments are fixed to the lower corners of the lining by fixing devices, and each arch segment is held on the inner surface of the lining by a quick-adhesion device such as screws or grouting material. This reinforcement structure can be installed within permissible clearance constraints when repairing and reinforcing existing deteriorated tunnels.

[0008] Prior Art 4: Chinese Invention Patent Application No. CN 113982631 A, published on January 28, 2022, discloses a tunnel support structure and a tunnel support method. The tunnel support structure includes an inner lining support and multiple support cells. The inner lining support extends along the tunnel axis and bends around the tunnel axis. Multiple support cells are sequentially connected to the outer peripheral surface of the inner lining support around and along the tunnel axis. Each support cell is used to contain fluid or concrete, and each support cell is used to abut against the inner peripheral wall of the tunnel after containing fluid or concrete.

[0009] Of the aforementioned prior art, both Prior Art 1 and Prior Art 2 are single-sided ring structures, which not only have low reinforcement efficiency over large areas but also have weak connections between structural rings, requiring high standards for overall stability of the support structure. Prior Art 3 and Prior Art 4 have complex structures, with the membrane bag located between the inner lining support and the tunnel inner wall. The membrane bag and the inner lining support are subjected to overall stress. Although they have high strength, the construction process is complex, the structural dimensions are large, and they significantly encroach on the tunnel clearance.

[0010] Therefore, when addressing deformation of tunnel lining structures, achieving rapid reinforcement construction while meeting tunnel clearance and reinforcement strength requirements is a pressing technical problem that needs to be solved. Furthermore, these problems not only exist in addressing deformation of tunnel lining structures but also in the support systems used during tunnel construction. Summary of the Invention

[0011] To address the shortcomings of the aforementioned background technology, this invention proposes a reinforcement device, a tunnel reinforcement structure, and a construction method thereof, which solves the technical problem that existing technologies cannot rapidly reinforce tunnels while meeting the requirements for tunnel clearance and reinforcement strength.

[0012] The technical solution of this application is as follows:

[0013] A reinforcement device includes a reinforcement structural unit, which includes a support body for connecting to the circumferential direction of the area to be reinforced. The support body includes individual support units spaced apart along the axial direction of the area to be reinforced. Adjacent support units are connected by membrane bags, which are provided with grouting holes and venting holes. In this invention, the support units and the expandable grouting membrane bags are combined to achieve rapid reinforcement construction while meeting the requirements of tunnel clearance and reinforcement strength. The invention also includes the structural form of the fiber cloth and its utilization method. Structural form: The membrane bag has a double-layer cavity structure, which can be regarded as an inflatable airbag. After the inner layer is filled, it fits tightly against the inner wall of the tunnel to ensure the transmission of force. The outer layer is wider than the inner layer, forming a better arched load-bearing structure. The performance of the arched load-bearing structure is similar to the load-bearing mode of corrugated steel. Since the curvature of the tunnel inner wall section and the corrugated steel arched section are approximately equal, the bending deformation is more coordinated. In addition to bearing negative bending moments, the arched section also bears a certain amount of pressure, and its load-bearing performance is better than that of a flat plate. In the prior art described in the background section, the reinforcement structure is a flat plate with very low bending stiffness. When subjected to a small negative bending moment, the curvature of the flat plate reinforcement structure is very large, resulting in a large slippage between it and the inner concrete layer. Consequently, the load is mainly borne by the tunnel segments, while the inner plate lining plays a relatively minor role in bearing the load.

[0014] Furthermore, the membrane bag includes an outer layer that adheres to the area to be reinforced and an inner layer that faces away from the area to be reinforced. The width of the inner layer is greater than the width of the outer layer, and the cross-section of the membrane bag after grouting forms a distinct arc shape, which further enhances the load-bearing capacity of the membrane bag after grouting.

[0015] Furthermore, the cavity between the outer and inner layers of the membrane bag is used to fill concrete, and the non-cavity portions of the outer and inner layers of the membrane bag are adhered to each other and connected to the end face of the support unit facing the area to be reinforced. That is, when installing the reinforcement structural unit, the non-cavity portions of the outer and inner layers of the membrane bag can be pressed between the support unit and the area to be reinforced, which not only fully ensures the sealing performance of the membrane bag, but also makes the connection between the support unit and the area to be reinforced more secure, and also makes the grouting effect of the membrane bag better.

[0016] Furthermore, the cross-section of the support unit is U-shaped, with its bottom surface in contact with the area to be reinforced. After the support unit is connected to the area to be reinforced, not only can the non-cavity portion of the membrane bag be pressed between the bottom surface of the support unit and the outer surface of the area to be reinforced, but the two sides of the support unit can also support the inner layer of the membrane bag that expands due to grouting, allowing the membrane bag to better form an arched load-bearing structure. In addition, the combined effect of the U-shaped support unit and the arched load-bearing structure can fully ensure the reliability of the reinforced structure during use.

[0017] Furthermore, the width of the inner layer of the membrane bag is more than 1.5 times the width of the outer layer of the membrane bag. By grouting and expanding the inner layer of the membrane bag, a better arched stress-bearing structure can be formed.

[0018] Furthermore, the membrane bag is a compressible and stretchable membrane bag. Before construction, the reinforced structural unit membrane bag is in a compressed state, which facilitates storage, transportation, and assembly. The individual support units on both sides of the membrane bag also provide protection for the membrane bag. During construction, stretching the membrane bag not only further improves construction efficiency but also enhances the grouting and forming effect, thereby further improving the load-bearing performance of the arched structure.

[0019] Furthermore, the inner layer and / or outer layer of the membrane bag are made of carbon fiber cloth or aramid fiber cloth. In this invention, the preferred material for the membrane bag is flexible fiber material such as carbon fiber cloth or aramid fiber cloth, which has high tensile strength and flexibility, allowing for good compression and expansion while meeting tensile requirements.

[0020] Furthermore, each support structure includes three individual support units, which are connected by the membrane bag. The outer layer of the membrane bag, which is used to fit the area to be reinforced, and the inner layer of the membrane bag, which faces away from the area to be reinforced, are both arranged along the width of the support structure. The outer circumferential surface of the support unit is connected to the outer surface of the inner layer of the membrane bag. The membrane bag in this technical solution is not only easy to process and use, but also allows the individual membrane bags in the reinforced structural unit to interact with each other during grouting. Even if there is a gap between the inner and outer layers of the membrane bag pressed between the support unit and the tunnel wall, the grouting effect can be guaranteed. Moreover, the grout entering the gap can fill the gap between the support unit and the area to be reinforced, making the stress more reliable.

[0021] Furthermore, each reinforced structural unit includes several sections of the aforementioned support body, with each section of the support body of the same reinforced structural unit being sequentially arranged along the circumferential direction of the area to be reinforced. This modular design not only facilitates processing, storage, transportation, and installation, but also has a wider range of applications. More importantly, it ensures the reliability of the molding process after each membrane bag is grouted. The sequentially arranged support units and membrane bags in the circumferential direction are connected to form an integrated structure that meets the reinforcement requirements.

[0022] Furthermore, adjacent circumferential support structures within the same reinforced structural unit are connected by a connecting structure, which fully ensures the reliability of force transmission between adjacent circumferential support structures and further guarantees the strength and stability of the reinforcement.

[0023] Furthermore, adjacent membrane bags in the same reinforcing structural unit are pressed together by a pressure member connected to the support body, which forces the two adjacent membrane bags to expand after grouting to form a mutually abutting structure, further ensuring the strength and reliability of the reinforcement.

[0024] Furthermore, the reinforced structural unit can be either closed at both ends or open at both ends. The overall shape of the reinforced structural unit can be selected according to the specific form of the area to be reinforced. A common example is a tunnel with deformed lining structure during operation, whose cross-section is often horseshoe-shaped. In this case, the corresponding reinforced structural unit can be designed as an open-ended horseshoe shape. If the cross-section of the area to be reinforced is inverted U-shaped, the corresponding reinforced structural unit can be designed as an open-ended inverted U-shaped shape. If the cross-section of the area to be reinforced is curved, the corresponding reinforced structural unit can be designed as an open-ended curved shape. When the reinforced structural unit is closed at both ends, it is suitable for tunnels with circular, elliptical, or rectangular cross-sections.

[0025] Furthermore, when the reinforced structural unit is open at both ends, legs are provided at both the head and tail of the reinforced structural unit. Providing legs not only simplifies the support structure of the reinforced structural unit, but also allows it to form a stable structure with the structure below, reliably supporting the area to be reinforced that is suspended above.

[0026] Furthermore, in the two support units on both sides of the reinforced structural unit, at least one support unit has a tail membrane bag connected to its outer side, and the tail membrane bag of the reinforced structural unit is connected to the support unit of the adjacent reinforced structural unit. This technical solution is applicable to situations where the axial direction of the area to be reinforced is relatively long, and multiple reinforced structural units can be connected end to end, which can form an integrated structure with better stress distribution and facilitate processing, transportation, and assembly.

[0027] Furthermore, the tail membrane bag and the membrane bag are an integral structure, which not only facilitates processing and use, but also allows the individual membrane bags in the reinforced structural unit to interact with each other during grouting. Even if there is a gap between the inner layer and the outer layer of the membrane bag pressed between the support unit and the tunnel inner wall, the grouting effect can be guaranteed. Moreover, the grout entering the gap can fill the gap between the support unit and the area to be reinforced, making the stress more reliable.

[0028] Furthermore, the support unit is a steel frame or a resin board.

[0029] Furthermore, when the support unit is a resin board, the membrane bag and the resin board are processed into an integral structure. The resin board can be fixed to the area to be reinforced by anchor bolts or bonded to the area to be reinforced.

[0030] Furthermore, when the support unit is a steel frame, the membrane bag is bonded or pressed to the steel frame, and the steel frame is fixed to the area to be reinforced by anchor bolts.

[0031] Furthermore, the grouting hole is located at the lower end of the membrane bag, and the venting hole is located at the upper end of the membrane bag, which fully ensures the reliability of grouting.

[0032] A tunnel reinforcement structure includes the reinforcement device, wherein the support body is arranged along the circumferential direction of the tunnel inner wall, and each support unit is spaced apart along the axial direction of the tunnel inner wall. The membrane bag is filled with concrete grout, and the cross-section of the concrete grout in the membrane bag is arc-shaped.

[0033] Furthermore, when the tunnel is a damaged tunnel with deformed lining structure during operation, the support body is connected to the tunnel lining, the outer layer of the membrane bag expands and adheres tightly to the tunnel lining through grouting, and the inner layer of the membrane bag expands and forms an arc shape through grouting.

[0034] Furthermore, when the tunnel is a construction tunnel during the excavation process, the support body is connected to the inner wall of the tunnel, the outer layer of the membrane bag expands through grouting and adheres tightly to the inner wall of the tunnel, and the inner layer of the membrane bag expands through grouting to form an arc shape.

[0035] Furthermore, when a track bed is provided at the bottom of the tunnel, the reinforcing structural unit is an open arc shape, and the support legs are connected to the track bed; when the inner wall of the tunnel is annular, the reinforcing structural unit is an annular shape with closed ends.

[0036] Furthermore, when a track bed is provided at the bottom of the tunnel, each reinforced structural unit includes three support sections, two of which are located on both sides of the tunnel inner wall, and the other support is connected between the upper ends of the two supports and located at the top of the tunnel inner wall.

[0037] Furthermore, when the inner wall of the tunnel is annular, each reinforced structural unit includes four support sections, two of which are located on both sides of the inner wall of the tunnel, and the other two are connected between the upper and lower ends of the two supports, respectively.

[0038] A construction method for tunnel reinforcement and strengthening structures, characterized by: employing the aforementioned reinforcement and strengthening device; the construction method includes a method for reinforcing and strengthening tunnels with deformed lining structures during operation, comprising the following steps:

[0039] S2: Construction of the reinforcement structure: Install support legs on both sides of the arch foot of the tunnel lining in the area to be reinforced. Pass the support body located on both sides of the tunnel inner wall in the reinforcement structure unit through the pipeline and embed it into the support leg. Fix the support body on the non-extended side of the support body on the tunnel lining. Then install the cable tray to replace the original pipeline tray. Then install the support body located at the top of the tunnel inner wall in the reinforcement structure unit. Connect the support body at the top of the tunnel inner wall with the support bodies on both sides of the tunnel inner wall to form an arch shape and extend the entire reinforcement structure unit. After the reinforcement structure unit is extended, fix the remaining support bodies on the tunnel lining. Install pressure pieces at the docking positions of the circumferentially adjacent membrane bags.

[0040] S3: Grouting for reinforced structure. After the reinforced structure unit is installed and fixed, concrete grout is injected into the membrane bag through the grouting hole. The air in the membrane bag is discharged through the vent hole until the membrane bag is filled and expanded.

[0041] Furthermore, before performing S2: reinforcement structure construction, S1: preliminary treatment is carried out. First, a tunnel defect detection vehicle is used to scan the lining defects to determine the location of the area to be reinforced and to divide the area to be reinforced into segments. A tunnel cleaning and repair trolley is used to clean and repair cracks and missing pieces on the surface of the tunnel lining in the first segment to be reinforced. After completion, the above work is repeated in the next segment to be reinforced.

[0042] Furthermore, the S2 reinforcement structure is first applied to the first section of the area to be reinforced, and then the operation is repeated for the next section of the area to be reinforced. The support body is inserted into the groove of the leg by the working arm of the reinforcement vehicle through the pipeline.

[0043] Furthermore, when the support unit is a steel frame, the steel frame is fixedly connected to the tunnel lining by anchor bolts; when the support unit is a resin board, the resin board is bonded to the tunnel lining.

[0044] Furthermore, when multiple areas to be reinforced are connected together, in two adjacent reinforced structural units, the support unit at the edge of one reinforced structural unit is connected to a tail membrane bag. After the tail membrane bag is bonded to the support unit at the edge of the other reinforced structural unit, it is extended and fixed for the next step, forming a reinforced area where multiple reinforced structural units are connected together.

[0045] In this invention, the support unit and the expandable grouting membrane bag are combined to achieve rapid reinforcement construction while meeting the requirements of tunnel clearance and reinforcement strength. The membrane bag is preferably made of flexible fiber materials such as carbon fiber cloth and aramid fiber cloth, which have high tensile strength and flexibility, allowing for compression and expansion while meeting tensile requirements. The main difference lies in the structural form of the fiber cloth and its utilization method. Structural form: The membrane bag has a double-layer cavity structure, which can be considered as an inflatable airbag. After the inner layer is filled, it fits tightly against the inner wall of the tunnel to ensure force transmission. The outer layer is wider than the inner layer, forming a better arched stress-bearing structure, which can be considered as the stress mode of corrugated steel. The cross-section of the tunnel segment and the arched cross-section of the corrugated steel have approximately equal curvature, resulting in more coordinated bending deformation. In addition to bearing negative bending moments, the arched cross-section also bears a certain amount of pressure, making its stress performance better than that of a flat plate. In the prior art described in the background section, the reinforcement structure is a flat plate with very low bending stiffness. When subjected to a small negative bending moment, the curvature of the flat plate reinforcement structure is very large, resulting in a large slippage between it and the inner concrete layer. Consequently, the load is mainly borne by the tunnel segments, while the inner plate lining plays a relatively minor role in bearing the load.

[0046] The specific beneficial effects of this invention include:

[0047] 1. High reinforcement efficiency: The reinforced structural unit utilizes the properties of fiber materials, with the support body driving the flexible membrane bag to achieve rapid and flexible expansion and contraction from line to surface, forming a shape in one step, achieving the effect of rapid construction;

[0048] 2. Excellent reinforcement effect: After the membrane bag is grouted, the outer side is tightly attached to the inner surface of the existing structure, and the inner side is a raised arched ring structure. The grout inside is constrained by pressure, and the membrane bag on the outer surface is under tension, giving full play to their respective characteristics and making it even stronger.

[0049] 3. Small space occupation: The support unit and the grouting membrane bag extend in the axial direction of the tunnel, occupying little radial space, which meets the tunnel clearance requirements;

[0050] 4. Good structural stability: The segmented reinforced structural unit is a high-strength thin shell, which has good structural stability. The single ring acts as a whole, and the combination of multiple rings improves the overall stability. The structure will not break apart when damaged, and it is corrosion resistant. Attached Figure Description

[0051] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1 A three-dimensional schematic diagram of a non-closed ring reinforcement structure composed of reinforced structural units;

[0053] Figure 2 A three-dimensional longitudinal cross-sectional view of the completed grouting construction of the reinforced structural unit;

[0054] Figure 3 A schematic diagram of a partial longitudinal section after the completion of grouting construction for the reinforced structural unit;

[0055] Figure 4 A three-dimensional schematic diagram of a reinforced structural unit under compression.

[0056] Figure 5 A longitudinal sectional view showing the completed installation of the two side outriggers and the two lower reinforcement structural units;

[0057] Figure 6 A schematic diagram of a partial transverse cross-section at the connection between the outrigger and the lower reinforcement structural unit;

[0058] Figure 7 A longitudinal cross-sectional view of the completed installation of the upper reinforcement structure unit;

[0059] Figure 8 This is a schematic diagram of the steel frame slot connection structure;

[0060] Figure 9 A longitudinal cross-sectional view of the completed reinforcement structure.

[0061] Figure 10 This is a schematic diagram of a partial transverse section of the fiber membrane bag connection after construction is completed;

[0062] Figure 11 A schematic diagram of a rapid reinforcement and strengthening system for existing tunnel linings;

[0063] Figure 12 A three-dimensional schematic diagram showing the completion of the reinforcement and structural extension fixing construction;

[0064] Figure 13 This is a schematic diagram of a partial longitudinal cross-section of the reinforcement structure of the flexible support body.

[0065] Figure 14 This is a longitudinal cross-sectional schematic diagram showing the connection of the two reinforced structural unit bodies in the reinforced area.

[0066] Explanation of icon numbers:

[0067] 1. Support frame; 11. Upper steel frame; 12. Lower steel frame; 13. Connecting hole; 14. Slot; 15. Resin board; 2. Membrane bag; 21. Upper membrane bag; 22. Lower membrane bag; 23. Grouting hole; 24. Vent hole; 25. Outer layer of membrane bag; 26. Inner layer of membrane bag; 3. Pressure component; 4. Rapid concrete grout; 5. Support leg; 6. Tunnel lining; 7. Track bed; 8. Pipeline; 9. Cable support frame; 10. Reinforcement structural unit; 20. Anchor bolt; 30. Bolt; 40. Arch-shaped load-bearing structure; 50. Inspection vehicle; 60. Cleaning and repair vehicle; 70. Reinforcement vehicle; 80. Grouting vehicle; 90. Upper reinforcement zone reinforcement structural unit; 91. Lower reinforcement zone reinforcement structural unit. Detailed Implementation

[0068] 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.

[0069] A reinforcement and strengthening device, such as Figure 1 , Figure 2 , Figure 3 As shown, it includes a reinforcement structure unit 10, which includes a support body 1 for connecting to the circumferential direction of the area to be reinforced. The support body 1 includes support units spaced apart along the axial direction of the area to be reinforced. Adjacent support units are connected by a membrane bag 2, which is provided with a grouting hole 23 and an air vent 24.

[0070] In this technical solution, the support unit and the expandable grouting membrane bag are combined to achieve rapid reinforcement construction while meeting the requirements of tunnel clearance and reinforcement strength. The key to this technical solution lies in the structural form of the fiber cloth and its utilization method. Structural form: The membrane bag has a double-layer cavity structure, which can be considered as an inflatable airbag. After the inner layer is filled, it adheres tightly to the inner wall of the tunnel to ensure force transmission. The outer layer is wider than the inner layer, forming a better arched load-bearing structure.

[0071] The performance of the arched load-bearing structure 40 is similar to that of corrugated steel. Since the curvature of the tunnel inner wall section is approximately equal to that of the corrugated steel arch section, the bending deformation is more coordinated. In addition to bearing negative bending moments, the arched section also bears a certain amount of pressure, resulting in better load-bearing performance than the flat plate section. In contrast, the existing technology described in the background section uses a flat plate reinforcement structure with extremely low bending stiffness. Even under relatively small negative bending moments, the curvature of the flat plate reinforcement structure is very large, leading to significant slippage between it and the inner concrete layer. Consequently, the load is primarily borne by the tunnel lining segments, with the inner flat plate bearing a relatively small load.

[0072] As a preferred embodiment of the reinforcement and strengthening device, such as Figure 3 As shown, the membrane bag 2 includes an outer membrane bag layer 25 that is attached to the area to be reinforced and an inner membrane bag layer 26 that is away from the area to be reinforced. The width of the inner membrane bag layer 26 is greater than the width of the outer membrane bag layer 25. The cross-section of the membrane bag after grouting forms an obvious arc shape, which further improves the load-bearing capacity of the membrane bag after grouting.

[0073] In a preferred embodiment of the reinforcement device, the cavity between the outer layer 25 and the inner layer 26 of the membrane bag is used to fill concrete. The non-cavity portions of the outer layer 25 and the inner layer 26 of the membrane bag are fitted together and connected to the end face of the support unit facing the area to be reinforced. That is, when installing the reinforcement structural unit 10, the non-cavity portions of the outer layer 25 and the inner layer 26 of the membrane bag can be pressed between the support unit and the area to be reinforced, which can not only fully ensure the sealing performance of the membrane bag 2, but also make the connection between the support unit and the area to be reinforced more firmly, and also make the grouting effect of the membrane bag 2 better.

[0074] As a preferred embodiment of the reinforcement and strengthening device, such as Figure 3 As shown, the cross-section of the support unit is U-shaped, and the bottom surface of the support unit is in contact with the area to be reinforced. After the support unit is connected to the area to be reinforced, not only can the non-cavity portion of the membrane bag 2 be pressed between the bottom surface of the support unit and the outer surface of the area to be reinforced, but the two sides of the support unit can also support the inner layer 26 of the membrane bag that expands due to grouting, allowing the membrane bag 2 to better form an arched load-bearing structure 40. Furthermore, the combined effect of the U-shaped support unit and the arched load-bearing structure 40 can fully ensure the reliability of the reinforcement during use.

[0075] As a preferred embodiment of the reinforcement device, the width of the inner layer 26 of the membrane bag is more than 1.5 times the width of the outer layer 25 of the membrane bag. By grouting and expanding the inner layer 26 of the membrane bag, a better arched stress structure 40 can be formed.

[0076] In a preferred embodiment of the reinforcement device, the membrane bag 2 is a membrane bag with compressible and extensible properties. Before construction, the membrane bag 2 of the reinforcement structure unit 10 is in a compressed state, which facilitates storage, transportation, and assembly. The individual support units on both sides of the membrane bag 2 also provide protection for the membrane bag 2. During construction, extending the membrane bag 2 can not only further improve construction efficiency but also improve the grouting and forming effect, thereby further enhancing the load-bearing performance of the arched load-bearing structure 40.

[0077] In a preferred embodiment of the reinforcement device, the inner layer 26 and / or outer layer 25 of the membrane bag is made of carbon fiber cloth or aramid fiber cloth. In this invention, the material of the membrane bag 2 is preferably a flexible fiber material such as carbon fiber cloth or aramid fiber cloth, which has high tensile strength and flexibility, allowing for good compression and expansion while meeting tensile requirements.

[0078] In a preferred embodiment of the reinforcement device, each support body 1 includes three support units. The three support units in the support body 1 are connected by the membrane bag 2. The outer layer 25 of the membrane bag 2, which is used to fit the area to be reinforced, and the inner layer 26 of the membrane bag, which is away from the area to be reinforced, are both arranged along the width direction of the support body 1. The outer peripheral surface of the support unit is connected to the outer surface of the inner layer 26 of the membrane bag. The membrane bag 2 in this technical solution is not only easy to process and use, but also allows the various membrane bags 2 in the reinforced structural unit 10 to interact during grouting. Even if there is a gap between the inner layer 26 and the outer layer 25 of the membrane bag pressed between the support unit and the tunnel inner wall, the grouting effect can be guaranteed. Moreover, the grout entering the gap can fill the gap between the support unit and the area to be reinforced, making the stress more reliable.

[0079] As a preferred embodiment of the reinforcement and strengthening device, such as Figure 1 As shown, each reinforced structural unit 10 includes several sections of the aforementioned support body 1. The support body sections 1 of the same reinforced structural unit 10 are arranged sequentially along the circumferential direction of the area to be reinforced. The modular design not only facilitates processing, storage, transportation, and installation, but also has a wider range of applications. More importantly, it ensures the reliability of the molding of each membrane bag 2 after grouting. The sequentially arranged support units and membrane bags 2 in the circumferential direction are connected to form an integrated structure that meets the reinforcement requirements.

[0080] In a preferred embodiment of the reinforcement device, adjacent circumferential support bodies 1 of the same reinforcement structural unit 10 are connected by a connecting structure, which fully ensures the reliability of force transmission between adjacent circumferential support bodies 1, and further ensures the strength and stability of the reinforcement. Figure 8 As shown, the connection structure includes a slot 14 at the end of the bracket unit, and adjacent bracket units are fixedly connected by bolts 30 after being snapped together.

[0081] As a preferred embodiment of the reinforcement and strengthening device, such as Figure 9 As shown, adjacent membrane bags 2 in the same reinforcing structural unit 10 are pressed together by a pressing member 3. The pressing member 3 is connected to the support body 1, which forces the two adjacent membrane bags 2 in the same direction to expand after grouting to form a mutually abutting structure, further ensuring the strength and reliability of the reinforcement.

[0082] In a preferred embodiment of the reinforcement device, the reinforcement structural unit 10 is either closed at both ends or open at both ends. The overall shape of the reinforcement structural unit 10 can be selected according to the specific form of the area to be reinforced. A common example is a tunnel with deformed lining structure during operation, whose cross-section is often horseshoe-shaped. In this case, the reinforcement structural unit 10 can be designed as an open horseshoe shape. If the cross-section of the area to be reinforced is inverted U-shaped, the reinforcement structural unit 10 can be designed as an open inverted U-shaped shape. If the cross-section of the area to be reinforced is curved, the reinforcement structural unit 10 can be designed as an open curved shape. When the reinforcement structural unit 10 is closed at both ends, it is suitable for tunnels with circular, elliptical, or rectangular cross-sections.

[0083] In a preferred embodiment of the reinforcement device, when the reinforcement structural unit 10 is open at both ends, support legs 5 are provided at both the head and tail of the reinforcement structural unit 10. Providing support legs 5 not only simplifies the support structure of the reinforcement structural unit 10, but also enables the support legs 5 to form a stable structure with the structure below, reliably supporting the area to be reinforced that is suspended above.

[0084] In a preferred embodiment of the reinforcement device, at least one of the two support units on both sides of the reinforced structural unit 10 has a tail membrane bag connected to its outer side, and the tail membrane bag of the reinforced structural unit 10 is connected to the support unit of the adjacent reinforced structural unit 10. This technical solution is applicable to situations where the axial direction of the area to be reinforced is relatively long. Multiple reinforced structural units 10 can be connected end to end, which can form an integrated structure with better stress distribution and facilitate processing, transportation, and assembly.

[0085] As a preferred embodiment of the reinforcement device, the tail membrane bag and the membrane bag 2 are an integral structure, which not only facilitates processing and use, but also allows each membrane bag 2 in the reinforcement structural unit 10 to interact during grouting. Even if there is a gap between the inner layer 26 and the outer layer 25 of the membrane bag pressed between the support unit and the tunnel inner wall, the grouting effect can be guaranteed. Moreover, the grout entering the gap can fill the gap between the support unit and the area to be reinforced, making the stress more reliable.

[0086] In a preferred embodiment of the reinforcement device, the support unit is a steel frame or a resin board 15. Alternatively, the support unit in this technical solution can be made of any type of material, as long as it can provide temporary support.

[0087] In a preferred embodiment of the reinforcement device, when the support unit is a resin board, the membrane bag 2 and the resin board are processed into an integral structure. The resin board can be fixed to the area to be reinforced by anchor bolts or bonded to the area to be reinforced.

[0088] In a preferred embodiment of the reinforcement device, when the support unit is a steel frame, the membrane bag 2 is bonded or pressed to the steel frame, and the steel frame is fixed to the area to be reinforced by anchor bolts.

[0089] In a preferred embodiment of the reinforcement device, the grouting hole 23 is located at the lower end of the membrane bag 2, and the venting hole 24 is located at the upper end of the membrane bag 2, which fully ensures the reliability of grouting.

[0090] A tunnel reinforcement structure includes any of the above-mentioned reinforcement devices. The support body 1 is arranged along the circumferential direction of the inner wall of the tunnel, and each support unit is spaced apart along the axial direction of the inner wall of the tunnel. The membrane bag 2 is filled with concrete grout, and the cross-section of the concrete grout in the membrane bag 2 is arc-shaped.

[0091] In a preferred embodiment of the tunnel reinforcement structure, when the tunnel is a defective tunnel with deformed lining structure during operation, the support body 1 is connected to the tunnel lining 6, the outer layer 25 of the membrane bag 2 is tightly attached to the tunnel lining 6 by grouting expansion, and the inner layer 26 of the membrane bag 2 is formed into an arc shape by grouting expansion.

[0092] In a preferred embodiment of the tunnel reinforcement structure, when the tunnel is a construction tunnel in the excavation process, the support body 1 is connected to the inner wall of the tunnel, the outer layer 25 of the membrane bag 2 expands and adheres tightly to the inner wall of the tunnel through grouting, and the inner layer 26 of the membrane bag 2 expands and forms an arc shape through grouting.

[0093] In a preferred embodiment of the tunnel reinforcement structure, when the bottom of the tunnel is provided with a track bed 7, the reinforcement structure unit 10 is an open arc shape, and the support leg 5 is connected to the track bed 7; when the inner wall of the tunnel is annular, the reinforcement structure unit 10 is an annular shape with closed ends.

[0094] As a preferred embodiment of the tunnel reinforcement structure, when the bottom of the tunnel is provided with a track bed 7, each reinforcement structure unit 10 includes three sections of the support body 1, wherein two support bodies 1 are located on both sides of the inner wall of the tunnel, and the other support body 1 is connected between the upper ends of the two support bodies 1 and located at the top of the inner wall of the tunnel.

[0095] As a preferred embodiment of the tunnel reinforcement structure, when the inner wall of the tunnel is annular, each reinforcement structure unit 10 includes four support bodies 1, wherein two support bodies 1 are located on both sides of the inner wall of the tunnel, and the other two support bodies 1 are respectively connected between the upper ends and the lower ends of the two support bodies 1.

[0096] The optimal implementation method for tunnel reinforcement is to provide a reinforcement structure for rapid reinforcement of tunnel lining.

[0097] like Figures 1-3 As shown, to achieve the above objectives, the tunnel lining reinforcement structure of the proposed technical solution includes: multiple interconnected reinforcement structure units 10, each unit 10 consisting of one or more temporary support stabilizing brackets 1 and one or more sections of planar extendable and fillable membrane bags 2. The unfilled membrane bags 2 are temporarily supported by the brackets 1 to expand and cover the area requiring reinforcement, and then grout 4 is filled into the membrane bags, ultimately forming a reinforcement structure 40 with the membrane bags 2 and grout 4 as the main load-bearing structures.

[0098] Among them, such as Figure 1 , Figure 2 and Figure 4 As shown, due to the limited space of the tunnel track bed 6 and the small tunnel construction space, the three interconnected reinforced structural units 10 form a non-closed ring structure, which together with the bottom support leg 5 forms a stable structure.

[0099] Among them, such as Figure 3 and Figure 4 As shown, the support body 1 includes three longitudinally spaced support units. These three support units are attached to the surface of the same membrane bag 2. The spacing between the support units can be adjusted to compress them for easier transport and assembly. Figure 4 As shown, extend it to cover the entire reinforced area, as Figure 3 As shown.

[0100] Specifically, each reinforced structural unit 10 includes several sections of the support body 1. The sections of the support body 1 within the same reinforced structural unit 10 are sequentially arranged along the circumferential direction of the area to be reinforced. The support unit 1 located on the upper side is designated as the upper steel frame 11, and the support unit 1 located on the lower side is designated as the lower steel frame 12.

[0101] Among them, such as Figure 1 , Figure 8 and Figure 9 As shown, the upper steel frame 11 and the lower steel frame 12 have pre-drilled connection holes 13 on their surfaces, which facilitates fixing the steel frame to the inner surface of the tunnel lining 6 with anchor bolts 20, and installing auxiliary structures such as connecting pressure pieces 3 and cable trays 9. The circumferential steel frames are connected by means of slots 14, bolts 30, etc.

[0102] Among them, such as Figure 3 As shown, the membrane bag 2 is a fiber membrane bag composed of high tensile strength and flexible carbon fiber material. A section of membrane bag 2 is composed of a single fiber membrane bag. The membrane bag 2 has a double-layer hollow structure. The outer layer 25 of the membrane bag at the attachment point of the support body 1 is fixed to the inner surface of the tunnel lining 6 by anchor bolts 20, and the inner layer 26 is bonded to the support body 1. The membrane bags 2 between adjacent upper steel frames 11 and adjacent lower steel frames 12 can be compressed and extended, and the width of the outer layer 2 of the inner membrane bag is different. The maximum extension width of the outer layer 25 of the membrane bag is more than 1.0 times the maximum interval distance between adjacent upper steel frames 11 and adjacent lower steel frames 12. By grouting expansion, the outer layer 25 of the membrane bag is tightly attached to the inner surface of the tunnel lining. The width of the inner layer 26 of the membrane bag is more than 1.5 times the width of the outer layer 25 of the membrane bag. By grouting expansion, the inner layer 26 of the membrane bag forms a better arched stress structure form 40.

[0103] Among them, grouting holes 23 are arranged on the surface of the inner layer 26 of the membrane bag between the upper steel frame 11 and the lower steel frame 12, and the air in the membrane bag 2 is discharged through the venting holes 24 added to the surface of the inner layer 26 of the membrane bag.

[0104] Among them, the circumferential membrane bags 21 and 22 are constrained by the pressure member 3, which forces the membrane bag 2 to expand and form a mutually abutting structure.

[0105] The cable tray 9 is connected to the steel frame 1 via the connecting hole 13. During the extension process, the original cable tray can be replaced or removed, ensuring that the conduit 8 does not fall off. Figure 5 Show.

[0106] Based on the above conditions, this invention is achieved through the following technical solution, forming a rapid reinforcement and strengthening system for existing tunnel linings that integrates multi-module mechanized simultaneous construction of detection, cleaning, repair, reinforcement, and grouting. Figure 11 As shown.

[0107] like Figure 12 As shown, multiple reinforced structural units 10 are assembled to form a closed ring structure, which is stabilized by its own structural form, and then filled with grout to form a closed ring arched load-bearing structure 40.

[0108] like Figure 13 As shown, the support body 1 is composed of multiple resin plates 15, which are directly processed into a whole with the membrane bag 2, forming a repeating structure of resin plate 15-membrane bag 2-resin plate 15. During construction, the non-extended side resin plates 15 are first bonded and fixed on the inner surface 6 of the tunnel, and then the spaced resin plates 15 are extended in sequence to drive the membrane bag 2 to expand and be bonded and fixed until the reinforcement structure unit 10 is extended, and then the grouting body 4 is filled.

[0109] A construction method for tunnel reinforcement and strengthening structures, characterized in that: the reinforcement and strengthening device described in any one of the above claims is used, and the construction method includes a method for reinforcing and strengthening tunnels with deformed lining structures during operation, comprising the following steps:

[0110] S2: Construction of the reinforcement structure: Install support legs 5 on both sides of the arch foot of the tunnel lining in the area to be reinforced. Pass the support body 1 located on both sides of the tunnel inner wall in the reinforcement structure unit 10 through the pipeline 8 and embed it into the support leg 5. Fix the support body 1 on the non-extended side of the support body 1 on the tunnel lining 6. Then install the cable tray 9 to replace the original pipeline tray. Then install the support body 1 located at the top of the tunnel inner wall in the reinforcement structure unit 10. Connect the support body 1 at the top of the tunnel inner wall with the support body 1 on both sides of the tunnel inner wall to form an arch shape, extending the entire reinforcement structure unit 10. After the reinforcement structure unit 10 is extended, fix the remaining support body on the tunnel lining 6. Install the pressure piece 3 at the docking position of the circumferentially adjacent membrane bags 2.

[0111] S3: Grouting for reinforcement structure. After the reinforcement structure unit 10 is installed and fixed, concrete grout is injected into the membrane bag 2 through the grouting hole 23. The air in the membrane bag 2 is discharged through the vent hole 24 until the membrane bag 2 is filled and expanded.

[0112] As a preferred embodiment of the construction method for tunnel reinforcement and strengthening structure, before carrying out the reinforcement structure in S2, S1 is carried out for preliminary treatment. First, the tunnel defect detection vehicle 50 is used to scan the lining defects to determine the location of the area to be reinforced and divide the area to be reinforced into segments. The tunnel cleaning and repair trolley 60 is used to clean and repair cracks and missing pieces on the surface of the tunnel lining 6 in the first segment to be reinforced. After completion, the above work is repeated in the next segment to be reinforced.

[0113] As a preferred embodiment of the construction method for tunnel reinforcement and strengthening structure, the S2 reinforcement structure is first constructed in the first section to be reinforced area, and then the operation is repeated in the next section to be reinforced area. The support body 1 uses the working arm of the reinforcement vehicle 70 to pass through the pipeline 8 and embed into the groove of the support leg 5.

[0114] In a preferred embodiment of the construction method for tunnel reinforcement and strengthening structure, when the support unit is a steel frame, the steel frame is fixedly connected to the tunnel lining 6 by anchor bolts 20; when the support unit is a resin board, the resin board is bonded to the tunnel lining 6.

[0115] As a preferred embodiment of the construction method for tunnel reinforcement and strengthening structures, when multiple sections of the area to be reinforced are connected together, in two adjacent reinforcement structural units 10, the support unit at the edge of one reinforcement structural unit 10 is connected to a tail membrane bag. After the tail membrane bag is pasted and connected to the support unit at the edge of the other reinforcement structural unit 10, it is extended and fixed for the next step of operation, forming a reinforcement area where multiple reinforcement structural units 10 are connected together.

[0116] The optimal implementation method for tunnel reinforcement and strengthening structures includes the following steps:

[0117] S1: Preliminary treatment. First, the tunnel defect detection vehicle 50 is used to scan the lining defects to determine the location of the reinforcement area and divide the reinforcement area into sections. Then, the tunnel cleaning and repair trolley 60 is used to clean and repair the lining surface of the first reinforcement section and repair defects such as cracks and missing pieces, so that the lining surface is clean and flat. After completion, the above work is repeated in the next reinforcement section.

[0118] S2: Reinforcement Structure Construction. In the first reinforcement section, support legs 5 are installed at the arch feet on both sides of the tunnel lining. Then, using the working arm of the reinforcement vehicle 70, the compressed reinforcement structure units 10 on both sides are passed through the pipelines 8 and embedded into the grooves of the support legs 5. The lower steel frame 12 on the non-extended side is fixed. Then, the cable support frame 9 is installed to replace the original pipeline support frame, such as... Figure 5 and Figure 6 As shown, the upper reinforcing structure unit 10 is installed similarly, and the upper and lower steel frames 12 are used to form an arch shape using the slots 14. Figure 7 and Figure 8 As shown, the entire reinforced structural unit 10 is then extended. After the extension is completed, the remaining steel frame 1 is fixed with anchor bolts 20, and connecting pressure pieces 3 are installed at the junction of each upper and lower membrane bag 21 and 22. After completion, the above work is repeated in the next reinforced area.

[0119] S3: Grouting of the reinforced structure. After the reinforced structure unit 10 is installed and fixed, the grouting truck 80 is connected to the bottom grouting hole 23 of the membrane bag 2, and rapid concrete grout 4 is injected under pressure. The air in the membrane bag 2 is discharged through the top vent hole 24 until the fiber membrane bag 2 is filled and expanded. All membrane bags 2 in this reinforced area are filled sequentially. Figures 9-10 As shown, after completing this step, repeat the above work in the next reinforcement area.

[0120] like Figure 14 As shown, when the two reinforced areas are connected together, an additional membrane bag 2 can be added to the rigid frame at the tail of the reinforced structural unit 90 of the upper reinforced area. When installing the reinforced structural unit 91 of the next reinforced area, the membrane bag 2 at the tail of the upper section is first glued to the rigid frame 1 at the head of the next section, and then extended and fixed to proceed to the next step, forming two reinforced areas connected together.

[0121] All aspects not detailed in this invention are conventional technical means known to those skilled in the art.

[0122] The above content shows and describes the basic principles, main features, and beneficial effects of the present invention. The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A reinforcement and strengthening device, characterized in that: It includes a reinforced structural unit (10), which includes a support body (1) for connecting in the circumferential direction of the area to be reinforced. The support body (1) includes support units spaced apart in the axial direction of the area to be reinforced. Adjacent support units are connected by a membrane bag (2). The membrane bag (2) is provided with a grouting hole (23) and an exhaust hole (24). The membrane bag (2) includes an outer membrane bag layer (25) that is attached to the area to be reinforced and an inner membrane bag layer (26) that is away from the area to be reinforced. The width of the inner membrane bag layer (26) is greater than the width of the outer membrane bag layer (25). The cavity between the outer layer (25) and the inner layer (26) of the membrane bag is used to fill concrete. The non-cavity parts of the outer layer (25) and the inner layer (26) of the membrane bag are attached to each other and connected to the end face of the support unit that is attached to the area to be reinforced. Each reinforced structural unit (10) includes several sections of the support body (1). Each section of the support body (1) of the same reinforced structural unit (10) is arranged sequentially along the circumferential direction of the area to be reinforced. The circumferentially adjacent support bodies (1) of the same reinforced structural unit (10) are connected by a connecting structure.

2. The reinforcement device according to claim 1, characterized in that: The membrane bag (2) is a membrane bag with compression and stretching properties.

3. The reinforcement device according to claim 2, characterized in that: Each support body (1) includes three support units. The three support units in the support body (1) are connected by the membrane bag (2). The membrane bag (2) is used to fit the outer layer (25) of the membrane bag to be reinforced and the inner layer (26) of the membrane bag to be reinforced is set along the width direction of the support body (1). The outer peripheral surface of the support unit is connected to the outer surface of the inner layer (26) of the membrane bag.

4. The reinforcement device according to claim 3, characterized in that: The circumferentially adjacent membrane bags (2) of the same reinforced structural unit (10) are pressed together by a pressing member (3), which is connected to the support body (1).

5. The reinforcement device according to any one of claims 1-4, characterized in that: The reinforced structural unit (10) is either closed at the head and tail or open at the head and tail. When the reinforced structural unit (10) is open at the head and tail, the head and tail of the reinforced structural unit (10) are provided with support legs (5).

6. The reinforcement device according to claim 5, characterized in that: Of the two support units on both sides of the reinforced structural unit (10), at least one support unit has a tail membrane bag connected to its outer side, and the tail membrane bag of the reinforced structural unit (10) is connected to the support unit of the adjacent reinforced structural unit (10).

7. The reinforcement device according to claim 6, characterized in that: The tail membrane bag and the membrane bag (2) are an integral structure.

8. The reinforcement device according to any one of claims 1-4, 6, and 7, characterized in that: The bracket unit is a steel frame or a resin board (15); when the bracket unit is a resin board, the film bag (2) and the resin board are processed into an integral structure; when the bracket unit is a steel frame, the film bag (2) is bonded to the steel frame.

9. A tunnel reinforcement structure, characterized in that: The device includes the reinforcement device according to any one of claims 1-8, wherein the support body (1) is arranged along the circumferential direction of the inner wall of the tunnel, and each support unit is arranged at intervals along the axial direction of the inner wall of the tunnel, and the membrane bag (2) is filled with concrete slurry, and the cross section of the concrete slurry in the membrane bag (2) is arc-shaped.

10. The tunnel reinforcement structure according to claim 9, characterized in that: When the tunnel is a defective tunnel with deformed lining structure during operation, the support body (1) is connected to the tunnel lining (6), the outer layer (25) of the membrane bag (2) is tightly attached to the tunnel lining (6) by grouting expansion, and the inner layer (26) of the membrane bag (2) is formed into an arc shape by grouting expansion. When the tunnel is a construction tunnel in the excavation process, the support body (1) is connected to the inner wall of the tunnel, the outer layer (25) of the membrane bag (2) is tightly attached to the inner wall of the tunnel by grouting expansion, and the inner layer (26) of the membrane bag (2) is formed into an arc shape by grouting expansion.

11. The tunnel reinforcement structure according to claim 9 or 10, characterized in that: When the bottom of the tunnel is provided with a track bed (7), the reinforcing structural unit (10) is an open arc shape, and the head and tail of the reinforcing structural unit (10) are connected to the track bed (7) through the support legs (5); when the inner wall of the tunnel is annular, the reinforcing structural unit (10) is an annular shape with closed head and tail.

12. The tunnel reinforcement structure according to claim 11, characterized in that: When the bottom of the tunnel is provided with a track bed (7), each reinforced structural unit (10) includes three sections of the support body (1), wherein two support bodies (1) are located on both sides of the inner wall of the tunnel, and the other support body (1) is connected between the upper ends of the two supports (1) and located at the top of the inner wall of the tunnel; when the inner wall of the tunnel is annular, each reinforced structural unit (10) includes four sections of the support body (1), wherein two support bodies (1) are located on both sides of the inner wall of the tunnel, and the other two support bodies (1) are respectively connected between the upper ends and the lower ends of the two supports (1).

13. A construction method for a tunnel reinforcement structure, characterized in that: The reinforcement and strengthening device according to any one of claims 1-8, the construction method includes a method for reinforcing and strengthening tunnels with deformed lining structures during operation, comprising the following steps: S1: Pre-treatment is carried out before the reinforcement of the structure; S2: Construction of the reinforcement structure: Install support legs (5) on both sides of the tunnel lining arch foot in the area to be reinforced. Pass the support body (1) located on both sides of the tunnel inner wall in the reinforcement structure unit (10) through the pipeline (8) and embed it into the support leg (5). Fix the support body (1) on the non-extended side of the support body (1) on the tunnel lining (6). Then install the cable tray (9) to replace the original pipeline tray. Then install the support body (1) located at the top of the tunnel inner wall in the reinforcement structure unit (10). Connect the support body (1) at the top of the tunnel inner wall with the support body (1) on both sides of the tunnel inner wall to form an arch shape and extend the entire reinforcement structure unit (10). After the reinforcement structure unit (10) is extended, fix the remaining support body on the tunnel lining (6). Install the pressure piece (3) at the docking position of the circumferentially adjacent membrane bag (2). S3: Grouting of reinforced structure. After the reinforced structure unit (10) is installed and fixed, concrete grout is injected into the membrane bag (2) through the grouting hole (23). The air in the membrane bag 2 is discharged through the exhaust hole 24 until the membrane bag 2 is filled and expanded.

14. The construction method for the tunnel reinforcement structure according to claim 13, characterized in that: S1: Preliminary treatment. First, a tunnel defect detection vehicle (50) is used to scan the lining defects to determine the location of the area to be reinforced and to divide the area to be reinforced into sections. A tunnel cleaning and repair trolley (60) is used to clean and repair cracks and missing pieces on the surface of the tunnel lining (6) of the first section to be reinforced. After completion, the above work is repeated in the next section to be reinforced.

15. The construction method for the tunnel reinforcement structure according to claim 13 or 14, characterized in that: First, the S2 reinforcement structure is applied to the first section of the area to be reinforced, and then the operation is repeated for the next section of the area to be reinforced. The support body (1) uses the working arm of the reinforcement vehicle (70) to pass through the pipeline (8) and embed into the groove of the support leg (5).

16. The construction method for the tunnel reinforcement structure according to claim 15, characterized in that: When the support unit is a steel frame, the steel frame is fixedly connected to the tunnel lining (6) by anchor bolts (20); when the support unit is a resin board, the resin board is bonded to the tunnel lining (6).

17. The construction method for the tunnel reinforcement structure according to any one of claims 13, 14, and 16, characterized in that: When multiple areas to be reinforced are connected together, in two adjacent reinforced structural units (10), the support unit at the edge of one of the reinforced structural units (10) is connected to a tail membrane bag. After the tail membrane bag is pasted and connected to the support unit at the edge of the other reinforced structural unit (10), it is extended and fixed to proceed to the next step, forming a reinforced area where multiple reinforced structural units (10) are connected together.

Images