A deformation joint usable for active faults

Abstract

This utility model relates to a deformation joint that can be used in active faults, belonging to the field of deformation joint technology. The deformation joint for active faults includes a secondary lining and a deformation joint body disposed within it. The deformation joint body has a back-adhered waterstop strip disposed inside, the back-adhered waterstop strip being U-shaped and capable of stretching. It also includes two replacement mechanisms, each located outside the back-adhered waterstop strip and used to assist in the rapid replacement of the waterstop strip. Each replacement mechanism includes a set of spring steel plates and two clamping plates. Two connecting strips are disposed outside the back-adhered waterstop strip, and the spring steel plates are disposed inside the back-adhered waterstop strip and are capable of horizontal movement. The design can employ reinforcing ribs combined with deformation grooves, which does not affect the misalignment of the waterstop strip while reducing its damage and extending its service life. It also allows for quick and convenient replacement of the back-adhered waterstop strip.

Description

Technical Field

[0001] This utility model relates to the field of deformation joint technology, and in particular to a deformation joint that can be used in active faults. Background Technology

[0002] Active fault zones may experience slow creep under non-seismic conditions. As the tunnel ages, the accumulated displacement can reach tens of centimeters, potentially leading to significant misalignment at the tunnel expansion joints, which in turn can cause waterproofing failure and affect the normal use of the tunnel. Under seismic conditions, active faults may experience even greater displacement, resulting in structural deformation, tearing of the waterproofing layer, or even collapse.

[0003] A search revealed the Chinese patent "A Deformation Joint Structure for a Tunnel Crossing an Active Fault Zone" (CN219262395U), which includes secondary lining, a stretchable waterproof layer, and initial support. A deformation joint is provided between two adjacent lining segments. This deformation joint, from the tunnel inner wall outwards, consists of a caulking system, a stretchable U-shaped embedded waterstop, a stretchable U-shaped back-adhesive waterstop, a stretchable waterproof layer, and a stretchable U-shaped drainage board. By implementing this stretchable drainage system, when lining segments shift, the U-shaped arms of the stretchable drainage board, waterproof layer, and waterstop provide sufficient deformation margin to ensure reliable waterproofing at the deformation joint even with significant segment shifts. However, this method has the following drawbacks in practical use: while it provides sufficient deformation margin, the waterstop is easily damaged during repeated vertical shifts, reducing its service life. Furthermore, the presence of a stretchable U-shaped embedded waterstop between the stretchable U-shaped back-adhesive waterstop and the caulking system makes subsequent replacement of the back-adhesive waterstop extremely inconvenient. Utility Model Content

[0004] Therefore, it is necessary to provide a deformation joint that can be used for active faults, addressing the problems of easy damage to waterstops and the extreme inconvenience of replacing back-attached waterstops.

[0005] An expansion joint for use in active faults includes a secondary lining and an expansion joint body disposed therein. The expansion joint body has a back-adhered waterstop disposed inside, the back-adhered waterstop being U-shaped and capable of stretching. It also includes two replacement mechanisms, each located outside the back-adhered waterstop and used to assist in the rapid replacement of the back-adhered waterstop. Each replacement mechanism includes a set of spring steel sheets and two clamping plates. Two connecting strips are disposed outside the back-adhered waterstop. The spring steel sheets are disposed inside the back-adhered waterstop and are capable of horizontal movement. The clamping plates are embedded in one side of the connecting strips.

[0006] In one embodiment, the spring steel sheet is arc-shaped, with the arc surfaces of two adjacent spring steel sheets facing each other, and a V-shaped groove is provided on one side of the card plate.

[0007] In one embodiment, the back-attached waterstop has a set of cavities inside, and a drive rod extending into the cavity is installed on one side of the spring steel sheet.

[0008] In one embodiment, a set of deformation grooves are provided on the inner side of the back-attached waterstop.

[0009] In one embodiment, the backing waterproofing strip has a set of flexible tubes communicating with the cavity inside, and the top of the flexible tubes is provided with an air injection tube.

[0010] In one embodiment, a set of reinforcing ribs, made of steel wire, are embedded on the outer side of the hose.

[0011] In one embodiment, the secondary lining is provided with a caulking joint, and the back-attached waterstop is provided with an embedded waterstop on the side away from the caulking joint.

[0012] Beneficial effects

[0013] 1. By setting spring steel sheets and clamping plates, and using iron tools to connect with the corresponding clamping plates, it is easy to move the connecting strip. At the same time, it drives two adjacent spring steel sheets to collide with each other, so that the reaction force drives the corresponding connecting strip to move, improving the movement effect of the connecting strip and reducing the difficulty of manual operation. When disassembling, the clamping plates are moved in the opposite direction and pulled with a hose to improve the disassembly efficiency. This method can quickly replace the back-adhesive waterstop, which is more convenient.

[0014] 2. The use of flexible hoses and reinforcing ribs enhances the structural strength of the back-attached waterstop. Combined with the deformation groove, it reduces stress concentration caused by excessive compression of the back-attached waterstop during deformation, thereby reducing damage and extending its service life. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 for Figure 1Enlarged diagram of A in the middle;

[0018] Figure 3 A schematic diagram of the structure of the expansion joint body and the backing waterstop;

[0019] Figure 4 This is a partial structural diagram of the flexible hose and reinforcing rib of this utility model.

[0020] Figure label:

[0021] 100. Secondary lining; 200. Expansion joint body; 300. Back-attached waterstop; 310. Butt joint strip; 320. Deformation groove; 330. Flexible hose; 331. Reinforcing rib; 400. Replacement mechanism; 410. Spring steel sheet; 411. Drive rod; 420. Clamping plate. 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 embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.

[0024] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this specification belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0027] The following is combined Figures 1-4 This invention describes a deformation joint that can be used in active faults.

[0028] In one embodiment, a deformation joint for use in active faults includes a secondary lining 100 and a deformation joint body 200 disposed therein. A back-adhered waterstop 300 is disposed inside the deformation joint body 200. The back-adhered waterstop 300 is U-shaped and can be stretched. It also includes two replacement mechanisms 400, which are disposed on the outside of the back-adhered waterstop 300 and used to assist in the rapid replacement of the back-adhered waterstop 300. Each replacement mechanism 400 includes a set of spring steel sheets 410 and two clamping plates 420. Two connecting strips 310 are disposed on the outside of the back-adhered waterstop 300. The spring steel sheets 410 are disposed on the inside of the back-adhered waterstop 300 and can move horizontally. The clamping plates 420 are embedded in one side of the connecting strips 310.

[0029] like Figure 1 and Figure 2 As shown, the spring steel sheet 410 is arranged in an arc shape, and the arc surfaces of two adjacent spring steel sheets 410 are arranged opposite each other. A V-shaped groove is provided on one side of the clamping plate 420.

[0030] In this embodiment, when installing the back-attached waterstop 300, the butt strip 310 is placed into the expansion joint body 200 and positioned accordingly. Then, two adjacent spring steel plates 410 can be driven to move relative to each other. During the contact process, the two corresponding butt strips 310 are pushed to move in opposite directions and are placed into the corresponding installation position. At this time, the user can use an iron tool to insert into the V-shaped groove in the corresponding card plate 420 to manually move and assist in the installation of the butt strip 310.

[0031] When disassembling the back-adhesive waterstop 300, the user can use an iron tool to insert into the V-groove in the corresponding clamp 420, gradually push the connecting strip 310 outward, and then pull out the back-adhesive waterstop 300 as a whole.

[0032] It should be noted that during the disassembly and assembly process, the selection of the clamping plate 420 can be made according to the position of the back-adhesive waterstop 300. The clamping plate 420 is made of rigid material. When a single clamping plate 420 is moved, the remaining clamping plates 420 can be forced to assist the movement of the connecting strip 310, thereby reducing the pressure of disassembly and assembly.

[0033] like Figure 2 As shown, the back-attached waterstop 300 has a set of cavities inside, and a drive rod 411 extending into the cavity is installed on one side of the spring steel sheet 410.

[0034] During the installation of the back-attached waterstop 300, gas is introduced into the cavity, causing the drive rod 411 to push the corresponding spring steel plate 410 to move. Subsequently, two adjacent spring steel plates 410 abut against each other, causing the two corresponding connecting strips 310 to move in opposite directions, thus moving to the corresponding area and completing the installation of the back-attached waterstop 300.

[0035] It should be noted that a piston disc is provided inside the cavity to mate with the drive rod 411, and the piston disc is made of rubber.

[0036] Furthermore, gas injection can be stopped after the gas injection is completed, and at this time the docking strip 310 has been installed in place, so gas leakage will not affect the docking strip 310.

[0037] Furthermore, during the insertion of the 310 connecting strip, users can use the iron tools used in the installation of conventional waterstop strips to assist in the movement, thereby improving installation efficiency.

[0038] like Figure 2 As shown, a set of deformation grooves 320 are provided on the inner side of the back-attached waterstop 300.

[0039] By using the deformation groove 320, when the expansion joint body 200 moves up and down, the deformation groove 320 can move adaptively under the influence of compression, reducing the stress concentration caused by excessive compression of the backing waterstop 300, thereby reducing the damage to the backing waterstop 300.

[0040] like Figure 1 , Figure 2 and Figure 4 As shown, the back-attached waterstop 300 has a set of hoses 330 that communicate with the cavity inside, and an air injection pipe is provided at the top of the hoses 330.

[0041] After the docking bar 310 is inserted into place, the user can use an external air pump to introduce gas into the hose 330 along the air injection pipe, and then the gas enters the cavity to drive the drive rod 411 to move.

[0042] like Figure 4 As shown, a set of reinforcing ribs 331 are embedded on the outside of the hose 330, and the reinforcing ribs 331 are made of steel wire.

[0043] The reinforcing rib 331, made of steel wire, can improve the structural strength of the hose 330. Both are integrally set in the backing waterstop 300, which improves the compressive strength and deformation recovery ability of the backing waterstop 300 without affecting the deformation movement. When the backing waterstop 300 is disassembled, the user can pull the hose 330 to assist in removing the backing waterstop 300.

[0044] like Figure 3 As shown, a caulking compound is provided on the secondary lining 100, and a centrally embedded waterstop is provided on the side of the back-attached waterstop 300 away from the caulking compound.

[0045] This positioning allows users to quickly replace the back-attached waterstop 300, reducing the obstruction of the replacement operation by the embedded waterstop and making it more convenient.

[0046] It should be noted that the embedded waterstop is pre-embedded inside the concrete and is tightly integrated with the structure. Its design life is usually 20 to 30 years and it usually does not need to be replaced. In contrast, the service life of the back-attached waterstop 300 is usually around 10 years and is affected by the environment, so it needs to be replaced regularly.

[0047] Working principle: When installing the back-attached waterstop 300, the outer connecting strip 310 is inserted into the expansion joint body 200 and positioned accordingly. Then, the user uses an iron tool to insert into the V-shaped groove in the corresponding clamping plate 420 and moves it for installation. At the same time, an external air pump is used to introduce gas into the cavity through the hose 330, so that the two adjacent spring steel plates 410 are in relative contact, and the two corresponding connecting strips 310 move in opposite directions, making it easier for the user to move and completing the installation quickly.

[0048] During disassembly, use an iron tool to push the connecting strip 310 outwards, while simultaneously pulling the corresponding area of ​​the hose 330 to provide an upward force to the back-adhesive waterstop 300, assisting the movement of the connecting strip 310 and improving disassembly efficiency, until the back-adhesive waterstop 300 is removed from the inside of the expansion joint body 200, thus completing the disassembly.

[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A deformation joint that can be used in active faults, characterized in that, include: The secondary lining (100) and the expansion joint body (200) disposed therein, wherein the expansion joint body (200) is provided with a back-adhesive waterstop (300) inside, the back-adhesive waterstop (300) is U-shaped and can be stretched. It also includes a replacement mechanism (400), of which there are two, and the replacement mechanism (400) is disposed on the outside of the back-adhesive waterstop (300) and is used to assist the back-adhesive waterstop (300) in quick replacement; The replacement mechanism (400) includes a set of spring steel sheets (410) and two clamping plates (420). Two connecting strips (310) are provided on the outer side of the back-attached waterstop (300). The spring steel sheets (410) are located on the inner side of the back-attached waterstop (300) and can move horizontally. The clamping plates (420) are embedded in one side of the connecting strips (310).

2. The deformation joint applicable to active faults according to claim 1, characterized in that, The spring steel sheet (410) is arranged in an arc shape, and the arc surfaces of two adjacent spring steel sheets (410) are arranged opposite each other. A V-shaped groove is provided on one side of the clamping plate (420).

3. The deformation joint that can be used in active faults according to claim 1, characterized in that, The back-attached waterstop (300) has a set of cavities inside, and a drive rod (411) extending into the cavity is installed on one side of the spring steel sheet (410).

4. The deformation joint that can be used for active faults according to claim 1, characterized in that, The inner side of the back-attached waterstop (300) is provided with a set of deformation grooves (320).

5. The deformation joint applicable to active faults according to claim 1, characterized in that, The back-attached waterstop (300) has a set of hoses (330) that communicate with the cavity inside, and the top of the hoses (330) is provided with an air injection pipe.

6. The deformation joint that can be used in active faults according to claim 5, characterized in that, A set of reinforcing ribs (331) are embedded on the outside of the hose (330), and the reinforcing ribs (331) are made of steel wire.

7. The deformation joint applicable to active faults according to claim 1, characterized in that, The secondary lining (100) is provided with a caulking joint, and the back-attached waterstop (300) is provided with an embedded waterstop on the side away from the caulking joint.

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