A composite deformation joint device for double-layer lining shield tunnel

Abstract

The present invention discloses a composite deformation joint device for a double-layered lining shield tunnel, belonging to the field of tunnel engineering technology, comprising: at least one segment water-stopping mechanism; each segment water-stopping mechanism comprising at least one first waterproof sealing gasket for sealing the longitudinal end faces of two adjacent segments; at least one inner lining water-stopping mechanism; each inner lining water-stopping mechanism comprising a receiving box and an annular inner lining anti-seepage component, the receiving box being provided with a receiving cavity matching the inner lining anti-seepage component, the inner lining anti-seepage component being provided within the receiving cavity for sealing the longitudinal end faces of the inner linings facing each other. The present invention provides a composite deformation joint device for a double-layered lining shield tunnel, which enables the segments and the inner lining to maintain the ability to coordinate deformation when a large lateral deformation and dislocation occurs in a double-layered lining shield tunnel, and the inner lining deformation joint can still maintain good waterproof performance.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel engineering, and in particular relates to a composite deformation joint device for a double-layer lining shield tunnel. Background Art

[0002] The shield tunnel adopts a double-layer lining structure with advantages such as high bearing capacity and good anti-seepage and anti-leakage performance. It can significantly improve the service performance and durability of the tunnel structure, and is gaining more and more attention and application under complex conditions such as underwater construction and heavy-load operation.

[0003] Different construction timings and methods can significantly alter the structural functions of shield tunnel linings and the interaction mechanism between the segmental lining and the inner lining. Based on different approaches to joint surface structural treatment, some researchers have proposed five joint surface interaction models. These include a segmental lining-only load-bearing model, in which the lining serves only structural functions such as anti-seepage, anti-impact, and line centerline correction; and models with no cohesion, cohesion, displacement coordination, and local displacement coordination, in which the lining exhibits varying degrees of load-bearing capacity.

[0004] The above five joint surface interaction models mainly solve the mutual mechanical effects between the inner and outer linings and the bearing capacity of the double lining. In order to solve the problem of the longitudinal adaptability of the double-layer lining tunnel to the ground deformation, the inner lining usually needs to be set with deformation joints. The two commonly used deformation joint settings are coincident joints and offset joints. Among them, the double-layer lining shield tunnel with coincident joints has a strong adaptability to ground deformation and can reduce the cracking and damage of the inner lining structure. However, if the traditional deformation joint form is combined with the pipe segment tunnel, there will be problems with the stiffness coordination and waterproofing of the deformation joint and the pipe segment joint. In particular, when a large offset deformation occurs in the pipe segment joint, if the second lining deformation joint structure at this location is unreasonable, it may cause cracking and leakage in the double lining tunnel joint. Therefore, it is urgent to design an anti-seepage composite deformation joint structure that can adapt to ground deformation and meet the requirements of the coordination of the inner and outer linings.

[0005] Furthermore, conventional double-lined shield tunnels have numerous segment joints and lining expansion joints, making the groundwater seepage path unclear and complicating leakage prevention. Once leakage occurs, it's difficult to analyze the path and implement targeted drainage and plugging measures, negatively impacting tunnel safety. Therefore, composite expansion joints must also provide both seepage prevention and plugging capabilities. Summary of the Invention

[0006] To address one or more of the above-mentioned deficiencies or improvement needs in the prior art, the present invention provides a composite expansion joint device for double-lined shield tunnels. This device ensures that even when a double-lined shield tunnel undergoes significant lateral deformation and dislocation, the segments and lining maintain coordinated deformation, maintaining excellent waterproofing at the lining expansion joint. Furthermore, water leakage between the segments and lining is confined to the vicinity of the joint, making it easier to handle the leakage.

[0007] To achieve the above object, the present invention provides a double-layer lining shield tunnel composite deformation joint device, comprising:

[0008] At least one pipe segment water-stopping mechanism; each of the pipe segment water-stopping mechanisms includes at least one first waterproof sealing gasket for sealing the longitudinal end faces of two adjacent pipe segments facing each other;

[0009] At least one lining water-stopping mechanism; each of the lining water-stopping mechanisms includes a accommodating box and a ring-shaped lining anti-seepage component, the accommodating box is provided with a accommodating cavity matching the lining anti-seepage component, the lining anti-seepage component is arranged in the accommodating cavity, and is used for sealing the longitudinal end faces of the linings relative to each other between two adjacent liners.

[0010] As a further preferred embodiment of the present invention, the accommodating box includes two box bodies divided by the longitudinal end surfaces of the two adjacent liners, and the longitudinal end surfaces of the two adjacent liners pass through the accommodating cavity.

[0011] As a further preferred embodiment of the present invention, through holes are provided at intervals along the circumferential direction at both longitudinal ends of the accommodating box, and the two box bodies are fixedly connected by bolts and nuts passing through the through holes.

[0012] As a further preferred embodiment of the present invention, a rubber gasket is provided between the nut and the box body.

[0013] As a further preferred embodiment of the present invention, the box body is a conical ring, the outer diameter of which decreases longitudinally from one end of the longitudinal end face of the liner, and the inner diameter of which decreases longitudinally and increases longitudinally from one end of the longitudinal end face of the liner.

[0014] As a further preferred embodiment of the present invention, a contact plate is provided at one end of the box body facing the longitudinal end face of the lining, and water-swelling material is provided on the opposite end faces of the contact plates of two adjacent box bodies for sealing the two longitudinal planes of the lining after water seepage.

[0015] As a further preferred embodiment of the present invention, a grouting pipe is provided on the box body, one end of which is located in the accommodating cavity, and the other end passes through the side wall of the box body and the lining and extends into the tunnel, for filling the lining anti-seepage component into the accommodating cavity.

[0016] As a further preferred embodiment of the present invention, it also includes a water-stopping mechanism provided at the joint surface between the pipe segment and the lining, for sealing the joint surfaces on both sides of the longitudinal end surface of the lining.

[0017] As a further preferred embodiment of the present invention, the joint surface water-stopping mechanism includes a U-shaped groove, a U-shaped steel template and a second ring-shaped waterproof sealing gasket fixed on the pipe segment. The second waterproof sealing gasket is used to seal the joint surfaces on both sides of the longitudinal end face of the lining through the U-shaped groove and the U-shaped steel template.

[0018] As a further preferred embodiment of the present invention, a pair of sealing gasket grooves are arranged opposite to each other on the longitudinal end faces of the two adjacent tube segments for installing the first waterproof sealing gasket.

[0019] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0020] In general, the above technical solutions conceived by the present invention have the following beneficial effects compared with the prior art:

[0021] (1) The present invention provides a composite deformation joint device for a double-layered lining shield tunnel. By providing at least one segment water-stopping mechanism on the longitudinal end faces of two adjacent segments and at least one liner water-stopping mechanism on the longitudinal end faces of two adjacent liners, the device enables the segments and liners to maintain coordinated deformation when a large lateral deformation occurs in the double-layered lining shield tunnel, and the lining deformation joints to maintain good waterproof performance. At the same time, by providing a water-stopping mechanism on the joint surface between the segment and the liner, water leakage between the segment and the liner is confined to the vicinity of the joint, making the treatment of the leakage water more simple and easy.

[0022] (2) The present invention provides a composite deformation joint device for a double-layer lined shield tunnel. The device limits the groundwater seepage path to an anti-seepage structure within the vicinity of the joint by means of a water-stopping mechanism provided at the joint surface between the segments and the lining. The device effectively limits the groundwater leaking into the joint surface between the segments and the lining along the overlapping joints to the elastic waterproof sealing pad between the joint surfaces, thereby preventing the groundwater from penetrating to weak locations along the joint surface. This also facilitates simpler and easier drainage / leakage plugging measures.

[0023] (3) The present invention provides a double-layer lining shield tunnel composite deformation joint device with a simple structure, high stability, safety and reliability. It is a water-stopping structure between lining deformation joints that can maintain anti-seepage performance when the stratum undergoes large lateral displacement. The device is composed of a pair of box bodies spliced together in opposite directions to form a container box, which is fastened into a whole by screws and nuts, and is filled with asphalt horseshoe grease anti-seepage body. The contact plate extending outward from the outer periphery of the box body and the water-swelling material set between the contact plates enable the internal space of the box body to remain sealed when water seeps in. The asphalt horseshoe grease anti-seepage body filled inside can flow in the internal space and block the internal seepage path. At the same time, the reaction force generated by the tension of the bolt acts on the box body through the nut and the rubber gasket, so that the box bodies are connected more tightly, effectively blocking the groundwater seepage path along the deformation of the lining. It has excellent economic benefits and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of a double-layer lining shield tunnel composite deformation joint device in the present invention;

[0025] Figure 2 This is a schematic diagram of the inner lining water-stopping mechanism of a double-layer lining shield tunnel composite deformation joint device in the present invention;

[0026] Figure 3 This is a schematic diagram of a joint surface water-stopping mechanism of a composite deformation joint device for a double-layer lining shield tunnel in the present invention;

[0027] Figure 4 It is a schematic diagram of the segment water-stopping mechanism of a composite deformation joint device for a double-layer lining shield tunnel in the present invention.

[0028] In all the drawings, the same reference numerals represent the same technical features, specifically:

[0029] 1. Lining water-stop mechanism; 11. Box body; 12. Contact plate; 13. Bolts; 14. Nuts; 15. Rubber gasket; 16. Lining anti-seepage component; 17. Grouting pipe;

[0030] 2. Joint surface water stop mechanism; 21. U-shaped groove; 22. Second waterproof sealing gasket upper portion; 23. Second waterproof sealing gasket lower portion; 24. U-shaped steel formwork;

[0031] 3. Segment water-stop mechanism; 31. Sealing gasket groove; 32. First waterproof sealing gasket. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0035] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0036] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0037] Example:

[0038] like Figures 1 to 4 As shown in the , the composite expansion joint device for a double-lined shield tunnel in a preferred embodiment of the present application enables the segments and lining to maintain coordinated deformation even when a double-lined shield tunnel undergoes significant lateral deformation and dislocation, maintaining good waterproofing at the lining expansion joint. Furthermore, this composite expansion joint structure confines water leakage between the segments and lining to the vicinity of the joint, making it easier to handle the leakage.

[0039] Specifically, if Figure 1 As shown in , in a preferred embodiment of the present application, the double-layer lining shield tunnel composite deformation joint device includes at least one segment water-stopping mechanism 3 and a lining water-stopping mechanism 1, wherein the segment water-stopping mechanism 3 is arranged on the two opposite longitudinal end faces of the adjacent segments, and is used to seal the longitudinal end faces of the two segments to prevent water seepage on the longitudinal end faces of the segments. The segment water-stopping mechanism 3 includes a first waterproof sealing gasket 32, which is arranged on the longitudinal end faces of the segments to achieve sealing between the segments. Preferably, the first waterproof sealing gasket 32 is an arc-shaped structure, and on the same vertical cross-section, the first waterproof sealing gasket 32 arranged on the segments arranged circumferentially can form a sealing belt along the tunnel. The lining water-stopping mechanism 1 includes a accommodating box and an annular lining anti-seepage component 16, wherein the accommodating box is provided with an accommodating cavity matching the lining anti-seepage component 16, and the lining anti-seepage component 16 is arranged in the accommodating cavity to seal the opposite longitudinal end faces of the adjacent liners. Preferably, a plurality of segment water-stopping mechanisms 3 and / or liner water-stopping mechanisms 1 can be arranged at intervals along the radial direction of the tunnel to improve the anti-seepage effect.

[0040] Furthermore, in a preferred embodiment of the present application, the container includes two boxes 11, which are arranged opposite each other, with their opposing surfaces coinciding with the longitudinal end surfaces of the liner. Both boxes 11 have a partial accommodating cavity for accommodating the liner anti-seepage member 16. In actual use, the two boxes 11 are disposed on two liners. When the two adjacent liners move, the two boxes 11 move synchronously, and the liner anti-seepage member 16 inside them blocks the gap between the two boxes 11, thereby preventing water from seeping between the liners.

[0041] More specifically, in a preferred embodiment of the present application, to achieve a stable connection between the two boxes 11, several pairs of through-holes are provided at annular intervals along the longitudinal end faces of the container. Bolts 13 are positioned within the through-holes, and nuts 14 are positioned at the longitudinal ends of the container to secure the two boxes 11. When the two liners shift laterally, the relative distance between the two boxes 11 equals the side length, causing the bolts 13 to stretch. The reaction force generated by the bolts 13 is then applied to the boxes 11 via the nuts 14, tightening the connection and effectively blocking the groundwater seepage path along the deformed liner. Furthermore, because the bolts 13 can exert a shear component of tension, they strengthen the shear stiffness of the liner, allowing the liner to provide some shear stiffness and enhancing the shear resistance of the composite expansion joint device. Preferably, a rubber gasket 15 is also provided between the nuts 14 and the boxes 11.

[0042] Furthermore, in a preferred embodiment of the present application, the box body 11 is a tapered ring as a whole, that is, the outer diameter of the box body 11 decreases longitudinally from one end of the longitudinal end face of the liner, while the inner diameter increases longitudinally from one end of the longitudinal end face of the liner.

[0043] Furthermore, in order to enhance the waterproof performance between the two box bodies 11, in a preferred embodiment of the present application, a contact plate 12 is provided at one end of the box body 11 facing the longitudinal end face of the lining, preferably a circular ring structure, and water-swelling material is provided on the opposite end faces of the contact plates 12 of the two adjacent box bodies 11, which is used to seal the two longitudinal planes of the lining after water seepage.

[0044] In more detail, in a preferred embodiment of the present application, a grouting pipe 17 is provided on the box body 11, one end of which is located in the accommodating cavity, and the other end passes through the side wall and lining of the box body 11 and extends into the tunnel, for filling the lining anti-seepage component 16 into the accommodating cavity.

[0045] Further preferably, in the preferred embodiment of the present application, the lining anti-seepage component 16 is an asphalt horseshoe grease anti-seepage body, which can flow in the internal space and block the internal seepage path when the tunnel undergoes lateral displacement, thereby achieving rapid sealing between two adjacent liners.

[0046] Furthermore, in a preferred embodiment of the present application, the double-layer lining shield tunnel composite deformation joint device is also provided with a joint surface water-stopping mechanism 2 for sealing the joint surfaces on both sides of the longitudinal end face of the inner lining. Preferably, the joint surface water-stopping mechanism 2 includes a U-shaped groove 21, a U-shaped steel template 24 and a second waterproof sealing gasket provided on the pipe segment, wherein the U-shaped steel template 24 is a complete full-ring template, and its diameter matches the inner diameter of the pipe segment. The U-shaped groove 21 and the U-shaped steel template 24 correspond to form a chamber for squeezing the second waterproof sealing gasket. Further preferably, the open side of the U-shaped steel template 24 is bent outward to form a contact plane, and the U-shaped steel template 24 can be fixed to the periphery of the U-shaped groove 21 by passing a fixing member through a through hole provided on the contact plane.

[0047] In more detail, in the preferred embodiment of the present application, the second waterproof seal is a second waterproof seal upper 22 and a second waterproof seal lower 23 respectively arranged on the U-shaped groove 21 and the U-shaped steel template 24, which are respectively fixed to the U-shaped groove 21 and the U-shaped steel template 24 by water-swelling materials to achieve the sealing of the gap between the pipe segment and the liner, thereby limiting the groundwater seepage path to the vicinity of the joint, and effectively limiting the groundwater that leaks into the joint surface of the pipe segment and the liner along the overlapping seam to the elastic waterproof seal between the joint surfaces. Preventing groundwater from penetrating to weak parts along the joint surface is also conducive to simpler and easier drainage / leakage plugging measures.

[0048] Furthermore, in a preferred embodiment of the present application, a pair of sealing gasket grooves 31 are relatively arranged on the longitudinal end faces of the two adjacent pipe segments for installing a first waterproof sealing gasket 32. During actual use, after the two pipe segments are fixedly installed, the two sealing gasket grooves 31 are relative to each other and squeeze the first waterproof sealing gasket 32, thereby achieving sealing of the longitudinal end faces between the two adjacent pipe segments.

[0049] Furthermore, in a preferred embodiment of the present application, a construction method for a double-layer lining shield tunnel composite deformation joint device is also disclosed, which comprises the following steps:

[0050] S1. Splice the circumferential seams of the segments.

[0051] S2. Apply water-swelling material on the inner surfaces of the U-shaped steel template 24 and the U-shaped groove 21.

[0052] S3. Fix the second upper waterproof sealing gasket 22 and the second lower waterproof sealing gasket 23 in the U-shaped groove 21 and the U-shaped steel template 24 respectively.

[0053] S4. Fasten the U-shaped steel template 24 to the periphery of the U-shaped groove 21 so that the second waterproof sealing gasket upper 22 and the second waterproof sealing gasket lower 23 are tightly pressed.

[0054] S5. Arrange the steel cage with the inner lining facing the segments;

[0055] S6. After water-swellable materials are placed on the two opposing contact plates 12, the two boxes 11 are fixed to the inner lining and grouting pipes 17 are placed accordingly;

[0056] S7, fasten the two box bodies 11 using bolts 13, nuts 14, and rubber gaskets 15;

[0057] S8. Arrange the steel cage with the inner lining facing away from the segment;

[0058] S9, pouring lining concrete;

[0059] S10 , injecting the lining anti-seepage component into the lining water-stopping mechanism 1 through the grouting pipe 17 .

[0060] The present invention discloses a composite deformation joint device for a double-layer lining shield tunnel, characterized by its simple structure, high stability, and safety. It features a water-stopping structure between lining deformation joints that maintains impermeability even when the ground undergoes significant lateral displacement. The device comprises a pair of opposing box bodies 11, which are fastened together as a single unit by screws and nuts 14 and filled with an asphalt grease impermeable material. The contact plates 12 extending from the periphery of the box bodies 11 and the water-swelling material disposed between the contact plates 12 ensure that the interior space of the box bodies 11 remains sealed even when water seeps in. The asphalt grease impermeable material filled within the interior space can flow within the space and block the internal seepage path. Furthermore, the reaction force generated by the tension of the bolts 13 acts on the box bodies 11 through the nuts 14 and rubber gaskets 15, further tightening the connection between the box bodies 11 and effectively blocking the groundwater seepage path along the deformed lining. The device has excellent economic benefits and is worth promoting.

[0061] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A double-layer lining shield tunnel composite deformation joint device, characterized in that: include: At least one pipe segment water-stopping mechanism; each of the pipe segment water-stopping mechanisms includes at least one first waterproof sealing gasket for sealing the longitudinal end faces of two adjacent pipe segments facing each other; At least one liner water-stopping mechanism; each of the liner water-stopping mechanisms includes a housing box and an annular liner anti-seepage component, the housing box is provided with a housing cavity matching the liner anti-seepage component, the liner anti-seepage component is arranged in the housing cavity, and is used to seal the longitudinal end faces of the liner opposite to each other between two adjacent liners; The storage box comprises two box bodies divided by the longitudinal end surfaces of the two adjacent liners, and the longitudinal end surfaces of the two adjacent liners pass through the storage cavity; and through holes are provided at intervals along the circumferential direction at both longitudinal ends of the storage box, and the two box bodies are fixedly connected by bolts and nuts passing through the through holes; The box body is a tapered ring, the outer diameter of which decreases in sequence along the longitudinal direction from one end of the longitudinal end face of the liner, and the inner diameter of which decreases and increases in sequence along the longitudinal direction from one end of the longitudinal end face of the liner.

2. The double-layer lining shield tunnel composite deformation joint device according to claim 1, wherein: A rubber gasket is provided between the nut and the box body.

3. The double-layer lining shield tunnel composite deformation joint device according to claim 1 or 2, wherein: A contact plate is provided at one end of the box body facing the longitudinal end surface of the liner, and water-swelling material is provided on the opposite end surfaces of the contact plates of two adjacent box bodies for sealing the two longitudinal planes of the liner after water seepage.

4. The double-layer lining shield tunnel composite deformation joint device according to claim 1 or 2, wherein: The box body is provided with a grouting pipe, one end of which is located in the accommodating cavity and the other end passes through the side wall of the box body and the lining and extends into the tunnel, for filling the lining anti-seepage component into the accommodating cavity.

5. The double-layer lining shield tunnel composite deformation joint device according to claim 1 or 2, wherein: It also includes a water-stopping mechanism provided at the joint surface between the pipe segment and the liner, for sealing the joint surfaces on both sides of the longitudinal end surface of the liner.

6. The double-layer lining shield tunnel composite deformation joint device according to claim 5, wherein: The joint surface water-stopping mechanism includes a U-shaped groove, a U-shaped steel template and a second ring-shaped waterproof sealing gasket fixed on the pipe segment. The second waterproof sealing gasket is used to seal the joint surfaces on both sides of the longitudinal end face of the lining by being arranged on the U-shaped groove and the U-shaped steel template.

7. The double-layer lining shield tunnel composite deformation joint device according to any one of claims 1, 2 and 6, wherein: A pair of sealing gasket grooves are arranged opposite to each other on the longitudinal end surfaces of the two adjacent tube segments for installing the first waterproof sealing gasket.

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