A hole plugging device for existing tunnel renovation

Abstract

The utility model provides a kind of existing tunnel remediation hole plugging device, is installed in remediation hole, remediation hole is set up on the inner edge surface of secondary lining, and plugging device includes: waterproof layer, waterproof layer is annular structure, with remediation hole, layout and closely adhere to remediation hole inside;Rigid support layer, rigid support layer is barrel type structure, is set to waterproof layer inside, and waterproof layer airtight adheres between rigid support layer and remediation hole;Sealing expansion, sealing expansion is filled in rigid support layer, and the airtight adhering of rigid support layer after hardening with inside sealing expansion.This utility model provides the device by the airtight adhering of waterproof layer, rigid support layer and sealing expansion makes plugging device become a sealed structure, and make plugging device and remediation hole airtight connection, not easy to produce crack and hole, can prevent plugging device and remediation hole separation and fall off.

Description

Technical Field

[0001] This utility model relates to the technical field of tunnel construction, and in particular to a sealing device for existing tunnel treatment holes. Background Technology

[0002] During the maintenance and remediation of existing tunnels in operation, the lining structure often suffers from various defects such as construction joint damage, expansion joint misalignment, insufficient secondary lining, voids behind the lining, and water leakage. To accurately detect and treat these defects, current technology generally employs a process of "drilling to expose the defect → treating the defect → sealing and restoring": a hole is drilled on the inner edge of the tunnel (the surface of the secondary lining), through which grout is injected, filled, or drained behind the lining. After the remediation work is completed, the hole is sealed with quick-setting cement mortar or similar materials. However, the periodic impacts and vibrations generated by vehicles (trains) running in the tunnel, or the pressure of high-pressure fissure water behind the lining, can easily cause micro-cracks in the sealing material. These cracks gradually expand, eventually causing the sealing material to detach from the borehole wall. Furthermore, existing sealing structures often rely on the adhesion or friction between a single material and the borehole wall for fixation. Once the bonding interface fails, the hole becomes a new seepage channel, inducing lining spalling. Therefore, conventional sealing methods suffer from detachment defects, leading to frequent secondary defects and failing to meet long-term operational safety requirements. Utility Model Content

[0003] The main purpose of this utility model is to provide an existing tunnel treatment hole sealing device to solve the problem of detachment defects in the current sealing method.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A sealing device for existing tunnel treatment holes is installed inside the treatment hole, which is located on the inner edge surface of the secondary lining. The sealing device includes:

[0006] A waterproof layer, which has a ring structure, is matched with the treatment hole and is laid out and tightly attached to the inner side of the treatment hole;

[0007] A rigid support layer, which is a cylindrical structure, is disposed inside the waterproof layer, and the waterproof layer is sealed and adhered between the rigid support layer and the treatment hole;

[0008] A sealing expansion material is filled within the rigid support layer, and the hardened sealing expansion material is tightly adhered to the inner side of the rigid support layer.

[0009] As a further improvement of this utility model, the treatment hole is a square hole, and the opening is located on one side of the inner edge surface of the secondary lining;

[0010] The rigid support layer includes four L-shaped plates;

[0011] The four long sides of the four L-shaped plates are enclosed to form a square cylindrical structure, and the waterproof layer is adhered to and compressed on the outer surface of the square cylindrical structure.

[0012] The four short sides of the four L-shaped plates extend toward one side of the outer surface of the square cylindrical structure and fit against the inner edge of the secondary lining.

[0013] The square cylindrical structure is embedded in the treatment hole.

[0014] As a further improvement of this utility model, the four L-shaped plates are respectively the first plate, the second plate, the third plate and the fourth plate;

[0015] The first plate, the second plate, the third plate, and the fourth plate are sequentially arranged to form the square cylindrical structure;

[0016] The first plate and the third plate are a set of opposing surfaces of the square cylindrical structure;

[0017] The second plate and the fourth plate are another set of opposite faces of the square cylindrical structure;

[0018] The first plate and the third plate clamp the second plate and the fourth plate.

[0019] As a further improvement of this utility model, guide grooves are provided on both sides of the inner side of the first plate and the third plate along the long side of the L-shaped plate.

[0020] The cross-section of the guide groove is an L-shaped groove;

[0021] The long side of the L-shaped groove is parallel to the outer surface of the cylindrical structure and extends toward the inner side of the nearest treatment hole.

[0022] The short side of the L-shaped groove is perpendicular to the outer surface of the cylindrical structure;

[0023] The two sides of the second plate and the two sides of the fourth plate respectively abut against the long side of the L-shaped groove on the same side as the first plate and the third plate.

[0024] As a further improvement of this utility model, multiple spheres are rotatably provided on both sides of the long side of the second plate and both sides of the long side of the fourth plate.

[0025] All of the spheres are in contact with the long side of the L-shaped groove.

[0026] As a further improvement of this utility model, the long side of the L-shaped plate facing the side of the waterproof layer is provided with a plurality of cones;

[0027] The tip of the cone faces the inner side of the treatment hole, and the tip of the cone penetrates the waterproof layer and embeds itself into the inner side of the treatment hole.

[0028] As a further improvement of this utility model, the sealing cap on the side of the square cylindrical structure away from its opening is provided with an inner end cap.

[0029] As a further improvement of this utility model, the sealing cap at the opening of the square cylindrical structure is provided with an outer end cap;

[0030] The side of the outer end cap away from the square cylindrical structure is flush with the inner edge of the secondary lining.

[0031] As a further improvement of this utility model, the outer end cap has four connecting plates extending vertically toward the side of the square cylindrical structure;

[0032] The four short sides of the four L-shaped plates are respectively provided with connecting grooves;

[0033] The four connecting plates are respectively interference-fitted with the four connecting slots.

[0034] As a further improvement of this utility model, the connecting plate has a chamfer on the side away from the outer end cover.

[0035] This utility model provides a sealing device for existing tunnel treatment holes, installed inside the treatment hole, which is located on the inner edge of the secondary lining. The sealing device includes: a waterproof layer, which is annular in structure and matches the treatment hole, arranged and tightly attached to the inner side of the treatment hole; a rigid support layer, which is cylindrical in structure and disposed inside the waterproof layer, with the waterproof layer sealed and adhered between the rigid support layer and the treatment hole; and a sealing expansion material, which fills the rigid support layer and, after hardening, is sealed and adhered to the inner side of the rigid support layer. The device provided by this utility model, through the mutually sealed waterproof layer, rigid support layer, and sealing expansion material, makes the sealing device a sealed structure and ensures a tight connection between the sealing device and the treatment hole, making it less prone to cracks and holes, and preventing the sealing device from separating and falling off from the treatment hole. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the existing tunnel treatment hole sealing device of this utility model in use.

[0037] Figure 2 This is a cross-sectional view along the height direction showing the existing tunnel improvement hole sealing device of this utility model in use.

[0038] Figure 3 for Figure 2Enlarged view of part A;

[0039] Figure 4 This is a schematic diagram of the overall structure of the existing tunnel treatment hole sealing device of this utility model;

[0040] Figure 5 This is a front view of the existing tunnel improvement hole sealing device of this utility model;

[0041] Figure 6 for Figure 5 A cross-sectional view of the structure along BB;

[0042] Figure 7 for Figure 6 Enlarged view of part C;

[0043] Figure 8 This is a schematic diagram of the exploded structure of the existing tunnel treatment hole sealing device of this utility model;

[0044] Figure 9 for Figure 8 Enlarged view of part D;

[0045] Figure 10 This is a schematic diagram of the outer end cap of the existing tunnel improvement hole sealing device of this utility model;

[0046] Labeling Explanation: 1. Secondary lining; 2. Sealing device; 3. Waterproof layer; 4. Rigid support layer; 5. Sealing expansion material; 6. L-shaped plate; 7. Sphere; 8. Cone; 9. Inner end cap; 10. Outer end cap. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0048] like Figure 1 and Figure 2 As shown, an existing tunnel treatment hole sealing device 2 is installed inside the treatment hole, which is located on the inner edge surface of the secondary lining 1, as shown. Figure 3 and Figure 4As shown, the sealing device includes: a waterproof layer 3, which is annular in structure and matches the treatment hole, being laid out and tightly fitted to the inner side of the treatment hole; a rigid support layer 4, which is cylindrical in structure and is disposed inside the waterproof layer 3, with the waterproof layer 3 sealed and adhered between the rigid support layer 4 and the treatment hole; and a sealing expansion material 5, which fills the rigid support layer 4, and the hardened sealing expansion material 5 is sealed and adhered to the inner side of the rigid support layer 4. In this embodiment, the specific materials of all components are not limited, as long as they can achieve the required function of the component. During the specific construction process, the operator selects materials according to the specific conditions and requirements of the construction. The materials described below in this embodiment are examples for the purpose of facilitating understanding of the technical solution, and the types of materials that can actually be used are not limited to those exemplified in the following description.

[0049] In this embodiment, the sealing expansion material 5 can be self-compacting concrete / grout, polymer-modified repair mortar, or polyurethane sealing foam, etc. Among them, when the gap is no more than five centimeters, the self-compacting concrete / grout uses Audime NS612 high-flow secondary grout, and when the gap is greater than five centimeters, quartz sand is added; the polymer-modified repair mortar is composed of cement-based materials, polymer emulsion, expansion agent and short-cut fibers; the polyurethane sealing foam adds polyethylene / polytetrafluoroethylene powder as a waterproofing agent.

[0050] like Figure 5 and Figure 6 As shown, the treatment hole is a square hole, and the opening is located on one side of the inner edge of the secondary lining 1; the rigid support layer 4 includes four L-shaped plates 6; the four long sides of the four L-shaped plates 6 enclose a square cylindrical structure, and the outer surface of the square cylindrical structure is adhered to and compressed with a waterproof layer 3; the four short sides of the four L-shaped plates 6 extend toward one side of the outer surface of the square cylindrical structure and are attached to the inner edge of the secondary lining 1; the square cylindrical structure is embedded in the treatment hole. The four L-shaped plates 6 are respectively the first plate, the second plate, the third plate, and the fourth plate; the first plate, the second plate, the third plate, and the fourth plate sequentially enclose a square cylindrical structure; the first plate and the third plate are one set of opposite faces of the square cylindrical structure; the second plate and the fourth plate are another set of opposite faces of the square cylindrical structure; the first plate and the third plate clamp the second plate and the fourth plate.

[0051] In this embodiment, before installing the rigid support layer 4, the cross-sectional shape of the treatment hole and its inner surface need to be repaired to make its cross-sectional shape a square. This shape is only an example; the cross-sectional shape of the treatment hole can be a regular polygon with an even number of sides not less than four. The technical solution provided in this embodiment can then be used. Simultaneously, the repaired inner surface can be sealed and adhered to the waterproof layer 3. The waterproof layer 3 is made of a special adhesive or coating, specifically high-modulus polyurethane sealant, silicone sealant, epoxy resin modified sealant, or fluorocarbon coating sealant, etc. The specific material selected depends on the actual working conditions. The waterproof layer 3 completely fills the gap between the long side of the L-shaped plate 6 and the inner surface of the treatment hole, preventing water from flowing out of this gap. Whether the waterproof layer 3 is installed before or after the L-shaped plate 6 is installed depends on the material of the waterproof layer 3, and the installation method of the waterproof layer 3 also depends on the material of the waterproof layer 3.

[0052] The first, second, third, and fourth boards each have their base surface on the surface of the board furthest from its short side, and their sides are respectively the long side and the wide side. The board containing the long side is a rectangular board, including a long edge, a wide edge, and a height edge. The height edge and long edge of the boards containing the long side of the first, second, third, and fourth boards are respectively equal. The wide edge of the boards containing the long side of the first and third boards is greater than the wide edge of the boards containing the long side of the second and fourth boards.

[0053] To facilitate the installation of the second and fourth plates, guide grooves are provided on both sides of the inner surface of the first and third plates, along the long side of their L-shaped plates 6. The cross-section of the guide groove is an L-shaped groove. The long side of the L-shaped groove is parallel to the outer surface of the cylindrical structure and extends toward the inner surface of the nearest treatment hole. The short side of the L-shaped groove is perpendicular to the outer surface of the cylindrical structure. The two sides of the second plate and the two sides of the fourth plate abut against the long side of the L-shaped groove on the same side of the first and third plates, respectively.

[0054] During installation, first slide the first and third plates along the extension direction of the treatment hole until the plates with their short sides abut against the inner edge of the secondary lining 1. Then slide the plates with their long sides along the guide groove until the plates with their short sides also abut against the inner edge of the secondary lining 1. Then increase the distance between the second and fourth plates by using a pressing tool until the second and fourth plates stop moving. In this embodiment, the extrusion tool can be a cylinder or hydraulic cylinder suitable for the size of the drilling hole, or a clamp-like structure tool. Specifically, the clamp-like structure consists of two plates or two rods hinged together by the same rotating shaft. During use, one end of the clamp-like structure abuts against the second and fourth plates respectively, while the other end is separated by external force, thereby extruding the second and fourth plates. Simultaneously, a threaded rod can be added to the side where the external force is applied. This threaded rod is a double-threaded rod, threaded to both ends of the plate or rod on the side where the external force is applied. When the threaded rod is rotated, one end of the two plates separates, while the other end extrudes the second and fourth plates. When the second and fourth plates are extruded to a preset position, the threaded rod is rotated in the opposite direction, pulling the extrusion tool out of the square cylindrical structure. Similarly, the extrusion tool can also be used when installing the first and third plates.

[0055] To prevent the plates containing the short sides of the first, second, third, and fourth plates from protruding from the inner edge of the secondary lining 1, a receiving groove is provided on the inner edge of the secondary lining 1, and the plates containing the short sides of the first, second, third, and fourth plates are all completely contained within the receiving groove.

[0056] like Figure 7 As shown, since the first and third plates clamp the second and fourth plates, to reduce friction, multiple spheres 7 are rotatably arranged on both sides of the second plate and the fourth plate, where the long side of the plate is located. All spheres 7 make point contact with the long side of the L-shaped groove. In this embodiment, a row of spheres 7 is arranged on both sides of the second plate and the fourth plate, with multiple spheres 7 in each row. Most of the spheres 7 are rotatably arranged on both sides of the second and fourth plates, while a small portion protrudes and makes point contact with the surface where the long side of the L-shaped groove is located. When the second and fourth plates are slidably installed, the spheres 7 rotate, converting sliding friction into rolling friction. In this embodiment, due to the arrangement of the spheres 7, gaps exist between the first and second plates, between the first and fourth plates, between the third and second plates, and between the third and fourth plates. The waterproof layer 3 can seal these gaps on the outside of the square cylindrical structure, preventing water from flowing into the square cylindrical structure.

[0057] like Figure 8 and Figure 9As shown, to further prevent the first, second, third, and fourth plates from separating from the treatment holes, multiple cones 8 are provided on the side of the L-shaped plate 6 facing the waterproof layer 3. The tips of the cones 8 face the inner side of the treatment hole, and the tips of the cones 8 penetrate the waterproof layer 3 and embed into the inner side of the treatment hole. In this embodiment, three rows of cones 8 are arranged on the outer side of the plates where the long sides of the four L-shaped plates 6 are located, specifically cones 8 or pyramids 8. Each row of cones 8 includes multiple cones 8, and the specific number is determined according to the construction requirements. To prevent the tips of the cones 8 from damaging the inner side of the treatment hole, the position of the tips after installation can be pre-calculated on the inner side of the treatment hole, thereby pre-opening an embedding groove for embedding the tips of the cones 8. When using the extrusion tool, the tips of the cones 8 of the first, second, third, and fourth plates are embedded in the embedding groove.

[0058] The square cylindrical structure has an inner end cap 9 on the side of the sealing cover away from its opening; the inner end cap 9 is located at the innermost side of the treatment hole. At the same time, the inner end cap 9 is square, the same shape as the treatment hole, and is embedded in the treatment hole.

[0059] like Figure 10 As shown, to enhance aesthetics, the opening of the square cylindrical structure is sealed with an outer end cap 10. The side of the outer end cap 10 away from the square cylindrical structure is flush with the inner edge of the secondary lining 1. The outer end cap 10 is also square, with its edge flush with the edges of the plates containing the short sides of the four L-shaped plates 6, thus completely covering the opening. The outer end cap 10 is also completely accommodated within the receiving groove. To facilitate the installation of the outer end cap 10, four connecting plates extend vertically from the side of the outer end cap 10 facing the square cylindrical structure; each of the four short sides of the four L-shaped plates 6 has a connecting groove; the four connecting plates are respectively interference-fitted with the four connecting grooves. To facilitate the interference-fit installation of the connecting plates and connecting grooves, a chamfer is provided on the side of the connecting plate away from the outer end cap 10. The chamfer makes it easier for the connecting plate to enter the connecting groove, thus facilitating installation. Then, pressure is applied to the outside of the outer end cap 10 using tools or by hammering, so that the surface of the outer end cap 10 facing the L-shaped plate 6 is completely fitted with the L-shaped plate 6.

[0060] The specific embodiments of the utility model have been described in detail above, but they are only examples, and the utility model is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications or substitutions to the utility model are also within the scope of the utility model. Therefore, all equivalent transformations, modifications, and improvements made without departing from the spirit and principles of the utility model should be covered within the scope of the utility model.

Claims

1. A sealing device for existing tunnel treatment holes, installed inside the treatment hole, wherein the treatment hole is located on the inner edge surface of the secondary lining (1), characterized in that, The sealing device includes: Waterproof layer (3), the waterproof layer (3) is a ring structure, which matches the treatment hole and is laid out and tightly attached to the inner side of the treatment hole; A rigid support layer (4) is a cylindrical structure and is disposed inside the waterproof layer (3). The waterproof layer (3) is sealed and adhered between the rigid support layer (4) and the treatment hole. A sealing expansion material (5) is filled in the rigid support layer (4), and the hardened sealing expansion material (5) is sealed and adhered to the rigid support layer (4).

2. The existing tunnel treatment hole sealing device according to claim 1, characterized in that, The treatment hole is a square hole, and the opening is located on one side of the inner edge of the secondary lining (1); The rigid support layer (4) includes four L-shaped plates (6); The four long sides of the four L-shaped plates (6) are enclosed to form a square cylindrical structure, and the waterproof layer (3) is adhered to and squeezed on the outer surface of the square cylindrical structure. The four short sides of the four L-shaped plates (6) extend toward the outer surface of the square cylindrical structure and fit against the inner edge of the secondary lining (1); The square cylindrical structure is embedded in the treatment hole.

3. The existing tunnel treatment hole sealing device according to claim 2, characterized in that, The four L-shaped plates (6) are respectively the first plate, the second plate, the third plate and the fourth plate; The first plate, the second plate, the third plate, and the fourth plate are sequentially arranged to form the square cylindrical structure; The first plate and the third plate are a set of opposing surfaces of the square cylindrical structure; The second plate and the fourth plate are another set of opposite faces of the square cylindrical structure; The first plate and the third plate clamp the second plate and the fourth plate.

4. The existing tunnel treatment hole sealing device according to claim 3, characterized in that, The inner sides of the first plate and the third plate are provided with guide grooves along the long side of the L-shaped plate (6); The cross-section of the guide groove is an L-shaped groove; The long side of the L-shaped groove is parallel to the outer surface of the cylindrical structure and extends toward the inner side of the nearest treatment hole. The short side of the L-shaped groove is perpendicular to the outer surface of the cylindrical structure; The two sides of the second plate and the two sides of the fourth plate respectively abut against the long side of the L-shaped groove on the same side as the first plate and the third plate.

5. The existing tunnel treatment hole sealing device according to claim 4, characterized in that, Multiple spheres (7) are rotatably provided on both sides of the long side of the second plate and both sides of the long side of the fourth plate; All of the spheres (7) are in contact with the long side of the L-shaped groove.

6. The existing tunnel treatment hole sealing device according to claim 2, characterized in that, The long side of the L-shaped plate (6) facing the waterproof layer (3) is provided with a plurality of cones (8); The tip of the cone (8) faces the inner side of the treatment hole, and the tip of the cone (8) penetrates the waterproof layer (3) and is embedded in the inner side of the treatment hole.

7. The existing tunnel treatment hole sealing device according to claim 2, characterized in that, The square cylindrical structure has an inner end cap (9) on the side of the sealing cover away from its opening.

8. The existing tunnel treatment hole sealing device according to claim 2, characterized in that, The opening of the square cylindrical structure is sealed with an outer end cap (10); The side of the outer end cap (10) away from the square cylindrical structure is flush with the inner edge of the secondary lining (1).

9. The existing tunnel treatment hole sealing device according to claim 8, characterized in that, The outer end cap (10) has four connecting plates extending vertically toward the side of the square cylindrical structure; The four short sides of the four L-shaped plates (6) are respectively provided with connecting grooves; The four connecting plates are respectively interference-fitted with the four connecting slots.

10. The existing tunnel treatment hole sealing device according to claim 9, characterized in that, The connecting plate has a chamfer on the side away from the outer end cap (10).

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