Concrete lining structure deformation joint expansion device for open cut tunnel

Abstract

The utility model provides a kind of structure deformation joint expansion device of open cut tunnel concrete lining, it is related to open cut tunnel sealing device technical field, including first expansion strip, the two sides of first expansion strip width direction are respectively connected with two adjacent open cut tunnel sections;Second expansion strip is set between first expansion strip and open cut tunnel section, the two sides of second expansion strip width direction are respectively connected with two adjacent open cut tunnel sections;First expansion strip and / or second expansion strip are provided with deformation part, deformation part is suitable when two adjacent open cut tunnel sections have relative displacement and deformation.When relative displacement occurs to adjacent open cut tunnel section, deformation part can be deformed with displacement to absorb and release the stress generated due to open cut tunnel section relative displacement, avoid the connection failure of first expansion strip and / or second expansion strip and open cut tunnel, to ensure the connection stability between first expansion strip and / or second expansion strip and two adjacent open cut tunnel sections, to further ensure the sealing effect of expansion device between two adjacent open cut tunnel sections.

Description

Technical Field

[0001] This utility model relates to the technical field of sealing devices for tunnels, and more specifically, to expansion joints of concrete lining structures in tunnels. Background Technology

[0002] As an important structural form in railway engineering, open-cut tunnels are widely used in mountainous railways, urban subways, and railway sections where open-cut construction is necessary due to geological constraints (open-cut tunnels are also known as cut-and-cover tunnels). They not only provide a stable operating channel for railway lines and effectively protect them from natural disasters such as landslides and mudslides, but also reduce the impact on ground traffic and the surrounding environment when traversing urban areas, thus ensuring railway transport safety and improving transport efficiency. In existing technologies, open-cut tunnels consist of multiple sections, with sealing devices installed between adjacent sections. These sealing devices are designed to prevent rainwater from entering the tunnel. However, when adjacent sections shift, the connection between the sealing device and the sections may fail, leading to a reduction or even complete failure of the sealing effect. Utility Model Content

[0003] The purpose of this utility model is to provide an expansion joint device for concrete lining structures in tunnels, in order to improve the aforementioned problems. To achieve this purpose, the technical solution adopted by this utility model is as follows:

[0004] This application provides an expansion joint device for a concrete lining structure with an open passage, comprising: a first expansion bar, the extension direction of which is parallel to the circumference of the open passage section, and both sides of the first expansion bar in the width direction being connected to two adjacent open passage sections respectively; a second expansion bar, disposed between the first expansion bar and the open passage section, and the extension direction of the second expansion bar being parallel to the circumference of the open passage section, and both sides of the second expansion bar in the width direction being connected to two adjacent open passage sections respectively; wherein, the first expansion bar and / or the second expansion bar are provided with a deformation portion, the deformation portion being adapted to deform when there is a relative displacement between two adjacent open passage sections.

[0005] According to some embodiments of the present invention, the first telescopic strip includes a first deformable part, and a first connecting plate is provided on both sides of the first deformable part. The two first connecting plates are respectively adapted to connect with two adjacent open-cut sections. The first deformable part is adapted to deform when the two adjacent open-cut sections have relative displacement.

[0006] According to some embodiments of the present invention, the second telescopic strip includes a second deformation part, and a second connecting plate is provided on both sides of the second deformation part. The two second connecting plates are respectively adapted to connect with two adjacent open-cut sections. The second deformation part is adapted to deform when the two adjacent open-cut sections have relative displacement.

[0007] According to some embodiments of this utility model, it also includes an anchor, which is connected to the open-cut section, and the free end of the anchor passes through the second connecting plate and the first connecting plate in sequence and then engages with a nut.

[0008] According to some embodiments of the present invention, a pressure plate is also included, which is disposed on the side of the first connecting plate away from the open section, and the pressure plate is provided with a through hole suitable for cooperating with the anchor.

[0009] According to some embodiments of this utility model, a waterproof sealing tape is provided between the second connecting plate and the open section.

[0010] According to some embodiments of the present invention, the first telescopic strip and the second telescopic strip are jointly constructed as a sealing section, and the sealing section is constructed in a plurality of arrangements along the circumference of the open section. The telescopic device further includes a connector, which is disposed on the side of the first telescopic strip away from the open section, and the connector is adapted to cover the connection seam between two adjacent sealing sections.

[0011] According to some embodiments of the present invention, the connector includes a third deformation part, and third connecting plates are respectively provided on both sides of the third deformation part. The third connecting plates are adapted to cooperate with the first telescopic bar and / or the second telescopic bar. The third deformation part cooperates with the first telescopic bar through fasteners. The third deformation part is adapted to deform when there is relative displacement between two adjacent open-cut sections.

[0012] According to some embodiments of the present invention, the third deformable part and the third connecting plate are fixed by fasteners, and a connecting ear is provided on the side of the third connecting plate away from the third deformable part. A suitable storage groove is defined between the connecting ear and the third deformable part, and the storage groove is suitable for accommodating the portions of the first telescopic bar and the second telescopic bar.

[0013] According to some embodiments of the present invention, the first telescopic strip is made of metal material, and the second telescopic strip is made of polymer material.

[0014] The beneficial effects of this utility model are as follows:

[0015] This invention provides deformation parts on the first and / or second telescopic strips. When relative displacement occurs between adjacent open sections, the deformation parts can deform accordingly, such as by stretching, compressing, or bending, to absorb and release the stress generated by the relative displacement of the open sections. This prevents the connection between the first and / or second telescopic strips and the open sections from failing, thereby ensuring the stability of the connection between the first and / or second telescopic strips and the two adjacent open sections, and thus ensuring the sealing effect of the telescopic device between the two adjacent open sections.

[0016] Other features and advantages of this invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing embodiments of the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a cross-sectional view of the telescopic device of this utility model in conjunction with the tunnel section;

[0019] Figure 2 This is a schematic diagram showing the cooperation between multiple sealing sections and connecting parts of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the connector of this utility model.

[0021] Markings in the diagram: 1. Expansion section; 10. First expansion joint; 11. First deformation section; 12. First connecting plate; 20. Second expansion joint; 21. Second deformation section; 22. Second connecting plate; 31. Anchor; 32. Nut; 40. Pressure plate; 50. Waterproof sealing tape; 60. Connector; 61. Third deformation section; 62. Third connecting plate; 63. Connecting lug; 70. Rivet; 80. Waterproof coating. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0023] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this utility model, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] like Figures 1-3 As shown, this embodiment provides an expansion joint device for a concrete lining structure in an open tunnel, comprising: a first expansion bar 10 and a second expansion bar 20. The extension direction of the first expansion bar 10 is parallel to the circumference of the open tunnel section 1, and both sides of the first expansion bar 10 in the width direction are respectively connected to two adjacent open tunnel sections 1. The second expansion bar 20 is disposed between the first expansion bar 10 and the open tunnel section 1, and the extension direction of the second expansion bar 20 is parallel to the circumference of the open tunnel section 1. Both sides of the second expansion bar 20 in the width direction are respectively connected to two adjacent open tunnel sections 1. The first expansion bar 10 and / or the second expansion bar 20 are provided with a deformation part, which is adapted to deform when two adjacent open tunnel sections 1 have relative displacement.

[0025] In some embodiments, the extension direction of the first telescopic strip 10 is parallel to the circumferential direction of the tunnel segment 1, meaning that on the annular structure of the tunnel, the first telescopic strip 10 is arranged along the circumferential direction of the tunnel. In the width direction of the first telescopic strip 10, both sides of the first telescopic strip 10 are connected to two adjacent tunnel segments 1, serving to connect the two adjacent tunnel segments 1. The second telescopic strip 20 is located between the first telescopic strip 10 and the tunnel segment 1, and the extension direction of the second telescopic strip 20 is parallel to the circumferential direction of the tunnel segment 1, meaning that the second telescopic strip 20 is also arranged along the circumferential direction of the tunnel. In the width direction of the second telescopic strip 20, both sides of the second telescopic strip 20 are also connected to two adjacent tunnel segments 1.

[0026] The first telescopic strip 10 and / or the second telescopic strip 20 are provided with deformable portions. This can be either the first telescopic strip 10, the second telescopic strip 20, or both the first and second telescopic strips 10 and 20 having deformable portions; there is no limitation here. The function of the deformable portions is to deform when two adjacent open-cut sections 1 undergo relative displacement, so that the first telescopic strip 10 and / or the second telescopic strip 20 can be stably connected to the two adjacent open-cut sections 1, thereby ensuring a sealing effect between the two adjacent open-cut sections 1.

[0027] It is understandable that when railway tunnels are affected by various factors such as temperature changes, foundation settlement, and train vibration, relative displacement will occur between adjacent tunnel sections 1, including axial expansion and contraction, and lateral misalignment. The expansion joint of this application provides deformation parts on the first expansion bar 10 and / or the second expansion bar 20. When relative displacement occurs between adjacent tunnel sections 1, the deformation parts can deform accordingly with the displacement, such as stretching, compressing, and bending, to absorb and release the stress generated by the relative displacement of the tunnel sections 1, avoid the failure of the connection between the first expansion bar 10 and / or the second expansion bar 20 and the tunnel, thereby ensuring the connection stability between the first expansion bar 10 and / or the second expansion bar 20 and the two adjacent tunnel sections 1, and thus ensuring the sealing effect of the expansion joint between the two adjacent tunnel sections 1.

[0028] According to some embodiments of the present invention, the first telescopic strip 10 includes a first deformation part 11, and a first connecting plate 12 is provided on both sides of the first deformation part 11. The two first connecting plates 12 are respectively adapted to connect with two adjacent open-cut sections 1. The first deformation part 11 is adapted to deform when the two adjacent open-cut sections 1 have relative displacement.

[0029] It is understood that the first telescopic strip 10 includes a first deformable part 11 and first connecting plates 12 disposed on both sides of the first deformable part 11. The two first connecting plates 12 are respectively used to connect with two adjacent open tunnel sections 1. The first deformable part 11 has the ability to deform when the two adjacent open tunnel sections 1 are relatively displaced. When the open tunnel sections 1 move relatively due to geological changes, train vibration, etc., the first deformable part 11 can adapt to this displacement change through its own deformation, thereby ensuring that the first telescopic strip 10 and the open tunnel section 1 always maintain a stable connection relationship, and at the same time ensure that the first telescopic strip 10 can always have a sealing effect on the two adjacent open tunnel sections 1, thereby improving the sealing effect of the open tunnel.

[0030] It is worth mentioning that the cross-section of the first deformed part 11 can be "V", "W" or other shapes, and there is no limitation here.

[0031] In other embodiments, the first deformable part 11 and the two first connecting plates 12 are manufactured separately and connected by welding or fasteners to form the first telescopic strip 10 of this application; of course, the first telescopic strip 10 can be integrally formed, which is not limited here.

[0032] According to some embodiments of the present invention, the second telescopic strip 20 includes a second deformation part 21, and a second connecting plate 22 is provided on both sides of the second deformation part 21. The two second connecting plates 22 are respectively adapted to connect with two adjacent open-cut sections 1. The second deformation part 21 is adapted to deform when the two adjacent open-cut sections 1 have relative displacement.

[0033] It is understood that the second telescopic strip 20 includes a second deformable part 21 and second connecting plates 22 disposed on both sides of the second deformable part 21. The two second connecting plates 22 are respectively used to connect with two adjacent open tunnel sections 1. The second deformable part 21 has the ability to deform when the two adjacent open tunnel sections 1 are relatively displaced. When the open tunnel sections 1 move relatively due to geological changes, train vibration, etc., the second deformable part 21 can adapt to this displacement change through its own deformation, thereby ensuring that the second telescopic strip 20 and the open tunnel section 1 always maintain a stable connection relationship, and at the same time ensure that the second telescopic strip 20 can always have a sealing effect on the two adjacent open tunnel sections 1, thereby improving the sealing effect of the open tunnel.

[0034] It is worth mentioning that the cross-section of the second deformable part 21 can be "V", "W" or other shapes, and there are no restrictions here.

[0035] In other embodiments, the second deformable part 21 and the two second connecting plates 22 are manufactured separately and connected by welding or fasteners to form the second telescopic strip 20 of this application; of course, the second telescopic strip 20 can be integrally formed, which is not limited here.

[0036] According to some embodiments of the present invention, the telescopic device further includes an anchor 31, which is connected to the open section 1. The free end of the anchor 31 passes through the second connecting plate 22 and the first connecting plate 12 in sequence and then engages with the nut 32.

[0037] In some embodiments, the anchor 31 may be an expansion bolt or a pre-embedded bolt, etc., which is not limited here. The anchor 31 is connected to the open section 1, and the free end of the anchor 31 protrudes from the outer surface of the open section 1. The first connecting plate 12 and the second connecting plate 22 are respectively provided with a first through hole and a second through hole. The first connecting plate 12 and the second connecting plate 22 cooperate with the anchor 31 through the first through hole and the second through hole, respectively. That is, the free end of the anchor 31 passes through the second through hole and the first through hole and then cooperates with the nut 32, thereby realizing the connection of the first telescopic strip 10 and the second telescopic strip 20 to the open section 1.

[0038] According to some embodiments of the present invention, the telescopic device further includes a pressure plate 40, which is disposed on the side of the first connecting plate 12 away from the open section 1, and the pressure plate 40 is provided with a through hole suitable for cooperating with the anchor 31.

[0039] In some embodiments, a pressure plate 40 is further provided between the nut 32 and the first connecting plate 12. The pressure plate 40 can increase the force area applied to the first connecting plate 12, thereby improving the clamping effect on the first connecting plate 12 and the second connecting plate 22. Of course, after the sealing device is engaged with the open section 1, a waterproof coating 80 can be applied to the outer surface of the sealing device and part of the outer surface of the open section 1. The waterproof coating 80 can further improve the sealing effect on two adjacent open sections 1.

[0040] According to some embodiments of the present invention, a waterproof sealing tape 50 is provided between the second connecting plate 22 and the open section 1.

[0041] In some embodiments, a waterproof sealing tape 50 is provided between the second connecting plate 22 and the open section 1. The waterproof sealing tape 50 can eliminate the gap between the second connecting plate 22 and the open section 1, thereby improving the sealing effect between the second connecting plate 22 and the open section 1. It should be noted that the cross-section of the waterproof sealing tape 50 can be rectangular, wavy, square, circular, etc., and the type of waterproof sealing tape 50 can be butyl rubber sealing tape, silicone sealing tape, polyurethane sealing tape, acrylic sealing tape, PVC waterproof tape, waterproof foam tape, etc., and there are no restrictions here.

[0042] According to some embodiments of the present invention, the first telescopic strip 10 and the second telescopic strip 20 are jointly constructed as a sealing section. The sealing section is constructed in a plurality of arrangements along the circumference of the open section 1. The telescopic device also includes a connector 60, which is disposed on the side of the first telescopic strip 10 away from the open section 1, and the connector 60 is adapted to cover the connection seam between two adjacent sealing sections.

[0043] In some embodiments, the first telescopic bar 10 and the second telescopic bar 20 are jointly constructed as a sealing section, and multiple sealing sections are arranged sequentially along the circumference of the open section 1, thereby reducing the length of each first telescopic bar 10 and the second telescopic bar 20, which facilitates the production, manufacturing and transportation of the telescopic device.

[0044] It is worth mentioning that by shortening the length of the first telescopic strip 10 and the second telescopic strip 20, it is easier to make the first telescopic strip 10 and the second telescopic strip 20 fit the arc-shaped setting of the outer surface of the tunnel section 1, thereby facilitating the fitting and connection of the telescopic device with the tunnel section 1.

[0045] Of course, the connector 60 is located on the side of the first telescopic strip 10 away from the open passage section 1, and the connector 60 can block the connection seam between two adjacent sealing sections. Thus, the connector 60 can prevent rainwater and other substances from entering the open passage through the connection seam between two adjacent sealing sections, thereby improving the sealing effect of the telescopic device on the open passage.

[0046] According to some embodiments of the present invention, the connector 60 includes a third deformation part 61, and a third connecting plate 62 is provided on both sides of the third deformation part 61. The third connecting plate 62 is adapted to cooperate with the first telescopic bar 10 and / or the second telescopic bar 20. The third deformation part 61 cooperates with the first telescopic bar 10 through fasteners. The third deformation part 61 is adapted to deform when two adjacent open-cut sections 1 have relative displacement.

[0047] In some embodiments, the connector 60 includes a third deformation portion 61 and third connecting plates 62 disposed on both sides of the third deformation portion 61. The two third connecting plates 62 are respectively used to connect with the first telescopic strip 10 and / or the second telescopic strip 20, so that the connector 60 can be connected with the first telescopic strip 10 and / or the second telescopic strip 20 as a whole. Of course, the connector 60 is suitable for connecting two adjacent sealing sections. Thus, the above arrangement can improve the connection stability of the telescopic device, thereby improving the connection stability between the telescopic device and the open section 1.

[0048] It is worth mentioning that the third deformation part 61 has the ability to deform when there is relative displacement between two adjacent tunnel sections 1. When the tunnel sections 1 move relative to each other due to geological changes, train vibration, etc., the third deformation part 61 can adapt to this displacement change through its own deformation, thereby ensuring that the connector 60 and the tunnel section 1 always maintain a stable connection relationship, and at the same time ensuring that the connector 60 can always have a sealing effect on the two adjacent sealing sections, thereby improving the sealing effect of the tunnel.

[0049] It is worth mentioning that the cross-section of the first deformed part 11 can be "V", "W" or other shapes, and there is no limitation here.

[0050] In some specific embodiments, the cross section of the third deformation part 61 corresponds to the cross section of the first deformation part 11. Thus, the above arrangement can ensure the stable connection between the connector 60 and the first telescopic strip 10, and can avoid interference of the connector 60 with the deformation of the first telescopic strip 10, thereby ensuring that the first telescopic strip 10 can stably adapt to the displacement between two adjacent open-cut sections 1.

[0051] According to some embodiments of the present invention, the third deformable part 61 and the third connecting plate 62 are fixed by fasteners. A connecting ear 63 is provided on the side of the third connecting plate 62 away from the third deformable part 61. A suitable storage groove is defined between the connecting ear 63 and the third deformable part 61. The storage groove is suitable for accommodating the portions of the first telescopic strip 10 and the second telescopic strip 20.

[0052] In some embodiments, the third deformable portion 61 and the third connecting plate 62 are fixed by fasteners, such as rivets 70. The connector 60 is constructed in a split form, that is, the connector 60 includes a split third deformable portion 61 and a third connecting plate 62. Thus, the above-described arrangement facilitates the manufacture of the third deformable portion 61 and the third connecting plate 62, thereby facilitating the manufacture of the connector 60.

[0053] It is worth mentioning that a storage groove is defined between the third connecting plate 62 and the connecting ear 63. Parts of the first connecting plate 12 of the first telescopic strip 10 and part of the second connecting plate 22 of the second telescopic strip 20 are both housed in the storage groove. The inner peripheral wall of the storage groove can restrict part of the outer peripheral wall of the first connecting plate 12 and the second connecting plate 22, thereby improving the fit stability of the first connecting plate 12 and the second connecting plate 22. At the same time, it can seal the gap between the first connecting plate 12 and the second connecting plate 22 to further ensure the sealing effect of the telescopic device.

[0054] According to some embodiments of the present invention, the first telescopic strip 10 is made of metal material, and the second telescopic strip 20 is made of polymer material.

[0055] In some embodiments, the first telescopic strip 10 is made of a metal material, which may be stainless steel, carbon steel, copper, aluminum alloy, nickel alloy, special metal, etc., without limitation. The metal material has the characteristics of high strength, good rigidity and stability, which enables the first telescopic strip 10 to withstand greater external forces and maintain the integrity and stability of the structure in the complex operating environment of railway tunnels.

[0056] The second telescopic strip 20 is made of polymer material. The polymer material can be various rubber materials (natural rubber, EPDM rubber, neoprene rubber, silicone rubber, etc.), polytetrafluoroethylene materials, thermoplastic elastomer materials (TPE, TPV, etc.), polyurethane, etc. There are no restrictions here. The polymer material has excellent elasticity, flexibility and corrosion resistance, which can better adapt to the deformation of the tunnel section 1, and is not easily corroded when in contact with water, chemicals, etc., thereby ensuring sealing performance.

[0057] It is worth mentioning that the first telescopic strip 10 is located on the side of the second telescopic strip 20 away from the tunnel section 1 and is made of metal. This allows the first telescopic strip 10 to protect the second telescopic strip 20 from corrosion by rainwater and extend its service life.

[0058] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0059] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An expansion joint device for a concrete lining structure of a tunnel, characterized in that, include: The first telescopic strip (10) extends in a direction parallel to the circumference of the tunnel section (1), and the two sides of the width direction of the first telescopic strip (10) are respectively connected to two adjacent tunnel sections (1). The second telescopic bar (20) is disposed between the first telescopic bar (10) and the tunnel section (1), and the extension direction of the second telescopic bar (20) is parallel to the circumferential direction of the tunnel section (1). The two sides of the width direction of the second telescopic bar (20) are respectively connected to two adjacent tunnel sections (1); wherein, the first telescopic bar (10) and / or the second telescopic bar (20) are provided with deformable parts, and the deformable parts are adapted to deform when two adjacent tunnel sections (1) have relative displacement.

2. The expansion joint device for the concrete lining structure of the tunnel according to claim 1, characterized in that, The first telescopic strip (10) includes a first deformation part (11), and a first connecting plate (12) is provided on both sides of the first deformation part (11). The two first connecting plates (12) are respectively adapted to connect with two adjacent open-cut sections (1). The first deformation part (11) is adapted to deform when the two adjacent open-cut sections (1) have relative displacement.

3. The expansion joint device for the concrete lining structure of the tunnel according to claim 2, characterized in that, The second telescopic strip (20) includes a second deformation part (21), and a second connecting plate (22) is provided on both sides of the second deformation part (21). The two second connecting plates (22) are respectively adapted to connect with two adjacent open-cut sections (1). The second deformation part (21) is adapted to deform when the two adjacent open-cut sections (1) have relative displacement.

4. The expansion joint device for the concrete lining structure of the tunnel according to claim 3, characterized in that, It also includes an anchor (31), which is connected to the open section (1). The free end of the anchor (31) passes through the second connecting plate (22) and the first connecting plate (12) in sequence and then engages with the nut (32).

5. The expansion joint device for the concrete lining structure of the tunnel according to claim 4, characterized in that, It also includes a pressure plate (40), which is disposed on the side of the first connecting plate (12) away from the open section (1), and the pressure plate (40) is provided with a through hole suitable for cooperating with the anchor (31).

6. The expansion joint device for the concrete lining structure of the tunnel according to claim 3, characterized in that, A waterproof sealing tape (50) is provided between the second connecting plate (22) and the open tunnel section (1).

7. The expansion joint device for the concrete lining structure of the tunnel according to claim 1, characterized in that, The first telescopic strip (10) and the second telescopic strip (20) together form a sealing section. The sealing section is composed of multiple sections arranged circumferentially along the open section (1). The telescopic device also includes a connector (60). The connector (60) is located on the side of the first telescopic strip (10) away from the open section (1), and the connector (60) is adapted to cover the connection seam between two adjacent sealing sections.

8. The expansion joint device for the concrete lining structure of the tunnel according to claim 7, characterized in that, The connector (60) includes a third deformation part (61), and a third connecting plate (62) is provided on both sides of the third deformation part (61). The third connecting plate (62) is adapted to cooperate with the first telescopic bar (10) and / or the second telescopic bar (20). The third deformation part (61) is cooperated with the first telescopic bar (10) by fasteners. The third deformation part (61) is adapted to deform when there is relative displacement between two adjacent open-cut sections (1).

9. The expansion joint device for the concrete lining structure of a tunnel according to claim 8, characterized in that, The third deformable part (61) and the third connecting plate (62) are fixed by fasteners. A connecting ear (63) is provided on the side of the third connecting plate (62) away from the third deformable part (61). A suitable storage groove is defined between the connecting ear (63) and the third deformable part (61). The storage groove is suitable for accommodating the portions of the first telescopic bar (10) and the second telescopic bar (20).

10. The expansion joint device for the concrete lining structure of the tunnel according to claim 1, characterized in that, The first telescopic strip (10) is made of metal, and the second telescopic strip (20) is made of polymer.

Images