GXJ rubber waterstop joint with variable pressure self-clamping and self-loosening and its application method

Abstract

This invention relates to a variable-pressure self-clamping and self-releasing GXJ rubber waterstop joint and its application method. The joint includes an elliptical hollow rubber body, a clamping assembly, a movable clamping component, a mud-proof assembly, and a rotatable clamping assembly. The elliptical hollow rubber body has a cavity. The clamping assembly achieves primary self-clamping through an elastic element; the movable clamping component moves downwards when the rubber body expands, achieving primary self-releasing. The mud-proof assembly guides mud through a rubber strip and prevents it from entering the clamp groove. The rotatable clamping assembly achieves secondary self-clamping and self-releasing through magnetic attraction or repulsion. This invention solves the problems of high construction difficulty, unstable fixing, high probability of detachment, difficulty in separating from the joint assembly, and easy deformation by the reinforcing cage in GXJ rubber waterstop joints. It also prevents mud from seeping into the groove and damaging the bonding effect of the GXJ rubber waterstop, improving the sealing and waterproofing performance of the joint at the diaphragm wall, and ensuring construction quality and water-stopping effect.

Description

Technical Field

[0001] This invention relates to the field of building waterproofing engineering technology, and in particular to the GXJ rubber waterstop joint with variable pressure self-clamping and self-loosening and its application method. Background Technology

[0002] As a key water-stopping component in the construction of diaphragm walls, the GXJ rubber waterstop joint uses a "convex" joint assembly to clamp the rubber waterstop at the joint of the trench section to achieve water-stopping function. However, it has significant technical defects: On the one hand, the existing joint relies on the friction generated by compressing the rubber section to fix the waterstop, which is prone to loosening and falling off due to vibration or external force during construction. After concrete pouring, it may stick together, making the waterstop easy to tear when peeling off. On the other hand, as a flexible material, the rubber waterstop is easily deformed by compression or scraping during the hoisting of the steel cage and concrete pouring, affecting its water-stopping performance. In addition, the waterstop is fixed by friction only after being placed in the groove of the joint assembly. The slurry in the trench section can easily seep into the groove and cover the rubber section, which will destroy the bonding force between the rubber and the concrete slurry during the later pouring process. It may also cause the concrete to stick to the waterstop after solidification, further increasing the difficulty of detachment and reducing the sealing and waterproofing effect of the joint.

[0003] Therefore, there is an urgent need to improve the GXJ rubber waterstop joint to enhance fixing reliability, simplify construction process, strengthen deformation resistance, and reduce the impact of mud intrusion on waterstop effect. Summary of the Invention

[0004] This invention addresses the problems of insufficient fixing reliability (easy loosening and detachment), difficulty in peeling from the joint components (easily causing tearing and damage to the waterstop), weak resistance to deformation under the pressure of the reinforcing cage, and decreased bonding strength due to slurry intrusion in the trench section (affecting the bonding effect between concrete and waterstop) in existing GXJ rubber waterstop joints during construction. It innovatively adopts a dual self-clamping and self-loosening structure driven by the expansion / contraction of an elliptical hollow rubber body. The elastic element compresses the clamping plate to achieve primary mechanical clamping, and a magnetic coupling drives the rotating rod to drive the lowering rod to complete secondary dynamic clamping, effectively avoiding the failure risk caused by traditional friction fixing methods. Simultaneously, the anti-slurry component adopts a dual design of inclined anti-slurry rubber strips and clamping rubber strips, achieving both directional slurry drainage and preventing its intrusion into the groove. Combined with the dual clamping, it reduces the negative impact of slurry on the bonding performance between the rubber section and concrete, fundamentally solving the problem of peeling and damage to the waterstop caused by slurry adhesion. It also enhances the resistance to disturbance during reinforcing cage construction, achieving the technical effects of improved joint construction tolerance, enhanced waterstop durability, and guaranteed joint sealing reliability. The technical solution provided by this invention is as follows:

[0005] On one hand, the present invention provides a variable-pressure self-clamping and self-releasing GXJ rubber waterstop joint, comprising:

[0006] Elliptical hollow rubber body: installed on GXJ rubber waterstop, with a cavity inside;

[0007] Clamping assembly: disposed on the inner wall of the groove of the clamp, including a clamping plate and an elastic element; one end of the elastic element is fixedly connected to the inner wall of the groove of the clamp, and the other end is fixedly connected to the clamping plate; the clamping plate clamps and fixes the GXJ rubber waterstop by the compression of the elastic element, realizing one-time self-clamping;

[0008] Movable clamping component: used to clamp the GXJ rubber waterstop, and equipped with a first magnet and a second magnet; when the elliptical hollow rubber body expands, the movable clamping component is squeezed and moved downward, and the second magnet is attracted to the clamping plate, so that the clamping plate is away from the GXJ rubber waterstop, realizing one-time self-release;

[0009] Mud-proof assembly: includes a mud-proof rubber strip and a clamping rubber strip; one end of the mud-proof rubber strip is inclinedly disposed on one side of the elliptical hollow rubber body, and the other end is fixedly connected to the clamping rubber strip, which is used to increase the area covering the top of the clamp and to divert mud away from the groove inside the clamp; the other end of the clamping rubber strip contacts the top of the clamp and is used to prevent mud from entering.

[0010] The rotatable clamping assembly includes a pressing rod and a rotating rod; one end of the pressing rod abuts against the clamping rubber strip, and the other end is rotatably connected to the rotating rod; a third magnet and a fourth magnet are provided on the rotating rod; wherein:

[0011] When the movable clamping component is moved and the elliptical hollow rubber body is not in contact with the movable clamping component, the first magnet and the third magnet attract each other by opposite poles, causing the rotating rod to rotate counterclockwise, which drives the pressing rod to press down and clamp the rubber strip for clamping and fixing, thus achieving secondary self-clamping.

[0012] When the elliptical hollow rubber body expands and compresses the movable clamping part to move downward, the first magnet and the fourth magnet repel each other, causing the rotating rod to rotate clockwise, which drives the lower pressure rod away from the clamping rubber strip, thus achieving secondary self-loosening.

[0013] In some specific embodiments, the movable clamping member is movably supported on the inner wall of the groove of the clamp by a support member, which is a guide rail and guide groove matching structure and is arranged perpendicular to the base plate.

[0014] In some specific embodiments, the movable clamping member has a bending component at one end near the clamping plate.

[0015] In some specific embodiments, the clamping plate includes an inclined portion and a horizontal clamping portion. The inclined portion is configured to cooperate with the inclined surface of the limiting rubber body at the end of the GXJ rubber waterstop, and the horizontal clamping portion is used to clamp the GXJ rubber waterstop.

[0016] In some specific embodiments, an insulating rubber sheet is provided in the middle of the cavity to divide the cavity into a first chamber and a second chamber; the insulating rubber sheet is provided with shear grooves; one of the first chambers or the second chamber is filled with water-swellable rubber beads.

[0017] In some specific embodiments, the GXJ rubber waterstop includes a ribbed rubber body and a water-swellable rubber body, wherein the height ratio of the ribbed rubber body to the water-swellable rubber body is (3-4):1.

[0018] In some specific embodiments, the guide rail and the guide groove are spaced apart.

[0019] In some specific embodiments, the rotatable clamping assembly further includes a rotating member disposed on the clamp, and the rotating rod is rotatably connected through the rotating member.

[0020] In some specific embodiments, the inner wall of the groove of the chuck is provided with an opening.

[0021] On the other hand, the present invention also provides a method for using a GXJ rubber waterstop joint, based on the variable pressure self-clamping and self-releasing GXJ rubber waterstop joint according to any one of the claims, comprising the following steps:

[0022] The air inside the cavity of the elliptical hollow rubber body is extracted to create negative pressure;

[0023] The elliptical hollow rubber body of the GXJ rubber waterstop is inserted into the movable clamping part in the groove of the clamp. The limiting rubber body at the end of the GXJ rubber waterstop is clamped by the clamping plate under the squeezing action of the elastic element.

[0024] The movable clamping component brings the first magnet and the third magnet closer together, while the elliptical hollow rubber body does not contact the movable clamping component. The first magnet and the third magnet attract each other through opposite poles, causing the rotating rod to rotate counterclockwise, which drives the pressing rod to rotate and press down to clamp the rubber strip, thus achieving secondary self-clamping.

[0025] After the concrete wall section is poured, air is injected into the cavity, causing the elliptical hollow rubber body to expand. The expanded elliptical hollow rubber body compresses the movable clamping part, causing the second magnet on it to attract the clamping plate, thus achieving the first self-release of the GXJ rubber waterstop in the clamped state. At the same time, the first magnet and the fourth magnet repel each other, causing the rotating rod to rotate clockwise, which moves the lower pressure rod away from the clamping rubber strip, thus achieving the second self-release.

[0026] By adopting the above technical solution, the GXJ rubber waterstop joint with variable pressure self-clamping and self-loosening mechanism and its application method provided by the present invention have the following beneficial effects:

[0027] 1. The clamping components are driven to move by the negative pressure contraction (clamping stage) and the air expansion (separation stage) of the elliptical hollow rubber body. Combined with the mechanical clamping of the elastic element and the magnetic coupling of the magnet (opposites attract to clamp the lower rod, like poles repel to loosen the lower rod), a double self-clamping effect and a double self-loosening function are formed. This solves the problem of easy loosening and falling off caused by the traditional joint relying on single friction fixation. At the same time, separation can be completed without external force assistance, avoiding the risk of tearing of the waterstop.

[0028] 2. The elliptical cross-section design of the elliptical hollow rubber body enhances the resistance to wall shear deformation and extends the seepage path; the bent structure of the anti-mud rubber strip and the clamping rubber strip increases the area covering the top of the clamp to divert mud away from the groove, and also blocks mud from entering through the clamping rubber strip. The combination of double clamping reduces the damage of mud to the bond between the rubber section and the concrete, avoids the waterstop from sticking after the concrete solidifies, and improves the reliability of peeling.

[0029] 3. During the clamping stage, the rubber structure is compacted by negative pressure contraction to resist the impact of concrete and the external force disturbance during hoisting and installation; during the separation stage, the covering mud is detached by inflation expansion, eliminating the influence of mud on the bonding strength and ensuring reliable bonding between the poured concrete and the waterstop; the anti-mud component and the double clamping work together to improve the adaptability and sealing durability of the joint in complex construction environments (such as the compression of the steel cage and the leakage of mud).

[0030] 4. The linkage design of pneumatic drive and magnetic coupling realizes the automation of the clamping / releasing process, reduces manual intervention and reduces construction difficulty; the elliptical hollow rubber body also has the function of preventing water seepage in gaps, and the integrated design reduces the number of parts, improving the overall stability of the joint and installation efficiency. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A schematic diagram of the GXJ rubber waterstop joint with variable pressure self-clamping and self-loosening provided in an embodiment of the present invention. Figure 1 ;

[0033] Figure 2 A schematic diagram of the GXJ rubber waterstop provided in an embodiment of the present invention;

[0034] Figure 3A schematic diagram of the GXJ rubber waterstop joint with variable pressure self-clamping and self-loosening provided in an embodiment of the present invention. Figure 2 .

[0035] The following is supplementary explanation of the attached figures:

[0036] 1-Oval hollow rubber body; 11-Cavity; 12-Water-swellable rubber bead; 13-Isolation rubber sheet; 131-Shear groove;

[0037] 2-Anti-mud component; 21-Anti-mud rubber strip; 22-Clamping rubber strip;

[0038] 31-Modible clamping component; 311-First magnet; 312-Second magnet; 32-Supporting component;

[0039] 4-Rotary clamping assembly; 41-Pressing rod; 42-Rotating rod; 421-Third magnet; 422-Fourth magnet; 43-Rotating component;

[0040] 5-Clamping assembly; 51-Clamping plate; 52-Elastic element;

[0041] 6-GXJ rubber waterstop; 61-limiting rubber body; 62-ribbed rubber body; 63-water-swellable rubber body;

[0042] 7-Clamp;

[0043] 81 - Initial trench section; 82 - Subsequent trench section; 83 - Reinforcing cage;

[0044] 9-Base plate. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0046] The term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the invention. In the description of the invention, it should be understood that the terms "upper," "lower," "top," "bottom," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. 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 with "first" and "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein.

[0047] When a numerical range is disclosed herein, the range is considered continuous and includes the minimum and maximum values ​​of the range, as well as every value between the minimum and maximum values. Furthermore, when the range refers to an integer, it includes every integer between the minimum and maximum values ​​of the range. Additionally, when multiple ranges are provided to describe a feature or characteristic, the ranges may be combined. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges to which they are included. For example, a specified range from “1 to 10” should be considered to include any and all subranges between the minimum value 1 and the maximum value 10. Exemplary subranges of the range 1 to 10 include, but are not limited to, 1 to 6.1, 3.5 to 7.8, 5.5 to 10, etc.

[0048] Please see Figures 1 to 3 The GXJ rubber waterstop joint with variable pressure self-clamping and self-releasing provided in this embodiment of the invention includes:

[0049] Elliptical hollow rubber body 1: Set on the GXJ rubber waterstop 6, it has a cavity 11 inside. Specifically, the elliptical hollow rubber body 1 set on the GXJ rubber waterstop 6 has a cavity 11 inside. During the clamping stage, the cavity 11 creates negative pressure by extracting air, causing the volume of the GXJ rubber waterstop 6 to shrink, and the elliptical hollow rubber body 1 to shrink to a compact state, thereby improving its ability to resist external forces such as concrete impact and hoisting installation. During the separation stage after the pre-cast concrete wall section is poured, air is introduced through the cavity 11 to expand the elliptical hollow rubber body 1 (natural air intake is sufficient; if the volume expansion is insufficient, compressed air can be added for inflation). On the one hand, this compresses the movable clamping member 31 to move downward, so that the second magnet 312 and the clamping plate 51 (ferromagnetic steel) are engaged. The elliptical hollow rubber body 1 adsorbs at the corresponding position of the plate, attracting the clamping plate 51 away from the GXJ rubber waterstop 6. This achieves the self-release of the clamping state of the GXJ rubber waterstop 6 without the need for external force, relying solely on the self-expansion and self-compression of the elliptical hollow rubber body 1 after air is introduced into the cavity 11. On the other hand, the expansion of the cavity 11 after air is introduced causes the covering mud to fall off, eliminating the influence of the mud on the bonding strength and improving the bonding effect with the concrete during later pouring. In addition, the elliptical hollow rubber body 1 is set to correspond with the gap between the adjacent underground continuous wall, which can not only block the flow of water in the gap, but its elliptical cross section can also improve the shear deformation resistance of the wall and extend the seepage flow path, thus enhancing the water-blocking effect.

[0050] Clamping assembly 5: Located on the inner wall of the groove of the clamp 7, it includes a clamping plate 51 and an elastic element 52; one end of the elastic element 52 is fixedly connected to the inner wall of the groove of the clamp 7, and the other end is fixedly connected to the clamping plate 51; the clamping plate 51 clamps and fixes the GXJ rubber waterstop 6 by the compression of the elastic element 52, realizing one-time self-clamping. Specifically, during the clamping stage, the movable clamping member 31 inside the clamp 7 clamps and positions the clamping part on one side of the elliptical hollow rubber body 1 of the GXJ rubber waterstop 6. After the limiting rubber body 61 with a bevel at the end of the GXJ rubber waterstop 6 passes through the beveled clamping plate 51, under the compression of the elastic element 52, the clamping plate 51 generates directional displacement and applies clamping force to the GXJ rubber waterstop 6, thus automatically completing one self-clamping action without manual intervention.

[0051] Movable clamping member 31: used to clamp the GXJ rubber waterstop 6, and a first magnet 311 and a second magnet 312 are provided thereon; when the elliptical hollow rubber body 1 expands, the movable clamping member 31 is squeezed and moved downward, and the second magnet 312 is attracted to the clamping plate 51, so that the clamping plate 51 is away from the GXJ rubber waterstop 6, realizing one-time self-release. Specifically, during the separation stage after the first concrete wall section is poured, air is introduced through cavity 11 to expand the elliptical hollow rubber body 1. The expansion force compresses the movable clamping member 31 downward, causing the second magnet 312 set on the movable clamping member 31 to move to the position corresponding to the clamping plate 51 (ferromagnetic steel plate). Through magnetic attraction, the clamping plate 51 is attracted away from the GXJ rubber waterstop 6. Thus, without the need for external force, only after the air inlet valve (not shown) of cavity 11 is opened to supply air, the self-expansion and compression of the elliptical hollow rubber body 1 are used to automatically complete the one-time self-release of the clamping state of the GXJ rubber waterstop 6.

[0052] The anti-mud component 2 includes an anti-mud rubber strip 21 and a clamping rubber strip 22. One end of the anti-mud rubber strip 21 is inclinedly disposed on one side of the elliptical hollow rubber body 1, and the other end is fixedly connected to the clamping rubber strip 22. This increases the area covering the top of the clamp 7 and diverts mud away from the groove inside the clamp 7. The other end of the clamping rubber strip 22 contacts the top of the clamp 7 to prevent mud from entering. Specifically, by setting the anti-mud rubber strip 21 and the clamping rubber strip 22 on the elliptical hollow rubber body 1, wherein the clamping rubber strip 22 contacts the top of the clamp 7, and the anti-mud rubber strip 21 adopts an inclined bending design and is connected to the elliptical hollow rubber body 1, the area covering the top of the clamp 7 is increased to effectively divert mud away from the groove inside the clamp 7 and prevent mud from entering. Furthermore, when the joint is held, it can support and tighten the contact between the clamping rubber strip 22 and the top of the clamp 7. This not only increases the contact area with the poured concrete and improves the contact strength, but also extends the barrier. The water path enhances the barrier effect against seepage water. Moreover, during the clamping stage, the rotatable downward pressure rod 41 presses down on the clamping rubber strip 22 to achieve clamping and fixation, preventing mud from entering and simultaneously clamping the GXJ rubber waterstop 6 to prevent loosening. During the separation stage, when air enters the cavity 11, causing the elliptical hollow rubber body 1 to expand, it squeezes the movable clamping member 31 to move downward. This causes the first magnet 311 and the fourth magnet 422 to repel each other due to their like poles, resulting in the rotating rod 42 rotating clockwise. This drives the downward pressure rod 41 away from the clamping rubber strip 22, thereby achieving secondary self-loosening.

[0053] Rotatable clamping assembly 4 includes a pressing rod 41 and a rotating rod 42; one end of the pressing rod 41 abuts against the clamping rubber strip 22, and the other end is rotatably connected to the rotating rod 42; the rotating rod 42 is provided with a third magnet 421 and a fourth magnet 422; wherein:

[0054] When the movable clamping part 31 is moved and the elliptical hollow rubber body 1 is not in contact with the movable clamping part 31, the first magnet 311 and the third magnet 421 attract each other by opposite charges, causing the rotating rod 42 to rotate counterclockwise, which drives the pressing rod 41 to press down and clamp the rubber strip 22 for clamping and fixing, thus achieving secondary self-clamping.

[0055] When the elliptical hollow rubber body 1 expands and compresses the movable clamping member 31 to move downward, the first magnet 311 and the fourth magnet 422 repel each other, causing the rotating rod 42 to rotate clockwise, which drives the pressing rod 41 away from the clamping rubber strip 22, thus achieving secondary self-release.

[0056] This invention achieves dual self-clamping and self-loosening functions through the negative pressure contraction and air expansion of the elliptical hollow rubber body 1, solving the problems of low reliability and easy loosening and falling off of traditional GXJ rubber waterstop 6 joints during construction. It also avoids the risk of tearing of the GXJ rubber waterstop 6 due to external force disassembly during the separation stage. The anti-mud rubber strip 21 and clamping rubber strip 22 effectively prevent mud from entering the groove, eliminating the influence of mud on the bonding strength and solving the problem of difficult peeling caused by mud adhesion after concrete pouring. The elliptical cross-section structure of the elliptical hollow rubber body 1 enhances the resistance to wall shear deformation and extends the seepage path. Combined with the elastic clamping of the end limiting rubber body 61 and the clamping plate 51, it improves the joint's resistance to deformation and water-stopping durability. The rotatable clamping component 54 drives the downward pressure rod 41 through magnetic coupling, realizing automatic control of the clamping / loosening process. This solves the problems of reinforcing cage compression deformation and easy damage to the GXJ rubber waterstop 6 under complex construction environments, improving the sealing and waterproofing effect and construction efficiency of the underground continuous wall joints.

[0057] In some specific embodiments, the movable clamping member 31 is movably supported on the inner wall of the groove of the clamp 7 by a support member 32. The support member 32 is a guide rail and guide groove structure, and is set perpendicular to the base plate 9. Specifically, the movable clamping member 31 is movably supported on the inner wall of the groove of the clamp 7 by the support member 32, which is a guide rail and guide groove structure set perpendicular to the base plate 9. This guide rail and guide groove structure provides stable and reliable guidance and support for the movable clamping member 31, ensuring that the elliptical hollow rubber body 1 can accurately drive the movable clamping member 31 to move smoothly along the preset path when it expands, avoiding deviation or jamming. The spaced guide rail and guide groove structure further enhances the support rigidity, so that the movable clamping member 31 maintains positional accuracy when subjected to compressive load, thereby ensuring the precise adsorption and docking of the second magnet 312 and the clamping plate 51, and realizing the reliability of the one-time self-release function.

[0058] In some specific embodiments, the movable clamping member 31 is provided with a bending component at one end near the clamping plate 51. Specifically, the movable clamping member 31 is provided with a bending component at one end near the clamping plate 51, which bends toward the side away from the GXJ rubber waterstop 6 to form a specific clearance space; when the movable clamping member 31 moves under the expansion of the elliptical hollow rubber body 1, the bending structure can effectively avoid interference with the clamping plate 51, ensuring that the clamping action is smooth and accurate.

[0059] In some specific embodiments, the clamping plate 51 includes an inclined portion and a horizontal clamping portion. The inclined portion is configured to cooperate with the inclined surface of the limiting rubber body 61 at the end of the GXJ rubber waterstop 6, and the horizontal clamping portion is used to clamp the GXJ rubber waterstop 6. Specifically, the clamping plate 51 adopts a composite structure design of inclined and horizontal clamping parts. The inclined part cooperates with the inclined surface of the end limiting rubber body 61 of the GXJ rubber waterstop 6 to form a guiding structure so that the limiting rubber body 61 can smoothly and unobstructedly enter the clamping area. The horizontal clamping part is used to directly clamp the main body of the GXJ rubber waterstop 6, providing uniform and stable clamping force. This structure is supported on the inner wall of the clamp 7 by the clamping plate 51 to form a stable support system. Under the squeezing action of the elastic element 52, the inclined part guides the limiting rubber body 61 to be accurately positioned, and the horizontal clamping part applies clamping force simultaneously to achieve efficient and stable clamping of the GXJ rubber waterstop 6, ensuring the reliability and repeatability of the self-clamping action, while reducing the risk of mechanical damage to the GXJ rubber waterstop 6 during the clamping process.

[0060] In some specific embodiments, an isolation rubber sheet 13 is provided in the middle of the cavity 11 to divide the cavity 11 into a first chamber and a second chamber; the isolation rubber sheet 13 is provided with a shear groove 131; one of the first chambers or the second chamber is filled with water-swellable rubber beads 12. Specifically, this technical solution can achieve multi-level water-blocking function. Under normal working conditions, the isolation rubber sheet 13 maintains the separation of the cavity 11, providing basic water-blocking capability; when the wall is subjected to large shear deformation, the shear groove 131 breaks, connecting the two chambers. At the same time, the water-swellable rubber beads 12 expand after absorbing water, not only increasing their own volume to block the water flow channel, but also entering the cavity 11 to further fill the gaps, increasing the water flow path. Through the dual superposition of physical blocking and material expansion, the water-blocking effect effectively copes with the risk of water seepage under complex working conditions and improves the water-stopping reliability of the joint under extreme conditions. Understandably, the elliptical hollow rubber body 1 is provided with a water inlet hole or a water inlet hole that can be opened when deformed.

[0061] In some specific embodiments, the GXJ rubber waterstop 6 includes a ribbed rubber body 62 and a water-swellable rubber body 63, with a height ratio of (3-4):1 between the ribbed rubber body 62 and the water-swellable rubber body 63. Specifically, the GXJ rubber waterstop 6 adopts a composite structure of ribbed rubber body 62 and water-swellable rubber body 63, preferably with a height ratio of (3-4):1. The higher ribbed rubber body 62 enhances the mechanical interlocking with concrete, improving the buoyancy resistance and stability of the GXJ rubber waterstop 6 during concrete pouring, ensuring accurate positioning of the GXJ rubber waterstop 6. At the same time, the lower water-swellable rubber body 63 layer expands moderately after contact with water, effectively filling gaps to achieve water-blocking function while avoiding structural deformation or displacement caused by excessive expansion. The height difference formed by the ribbed rubber body 62 extends the water flow penetration path, increases the crossing resistance, improves the composite water-stopping effect at the joint, and solves the technical problem of limited water-stopping performance of single materials.

[0062] In some specific embodiments, the guide rails and guide grooves are spaced apart. Specifically, the movable clamping member 31 is movably supported on the inner wall of the chuck 7 by the support member 32 using a guide rail and guide groove matching structure. The guide rails and guide grooves are arranged perpendicular to the base plate 9 and can be configured at intervals as needed, which can provide a stable and precise guiding support system. This ensures that the movable clamping member 31 can move smoothly along a preset path under the expansion drive of the elliptical hollow rubber body 1, avoiding deviation or jamming. The spaced guide rail and guide groove structure enhances the support rigidity, enabling the movable clamping member 31 to maintain positional accuracy when subjected to compressive loads. It also provides clearance space to ensure the precise adsorption and docking of the second magnet 312 and the clamping plate 51, avoiding obstruction and influence of the guide rails and guide grooves, and achieving the reliability of the one-time self-release function.

[0063] In some specific embodiments, the rotatable clamping assembly 54 further includes a rotating component 43, which is disposed on the chuck 7, and the rotating rod 42 is rotatably connected through the rotating component 43. Specifically, by setting the rotating component 43, a stable rotation fulcrum is provided for the rotating rod 42. The rotating component 43 is fixed on the chuck 7, enabling the rotating rod 42 to perform precise rotational movement around a preset axis. Through the structural support of the rotating component 43, it is ensured that the rotating rod 42 can smoothly complete counterclockwise or clockwise rotation under the action of magnetic force, driving the pressing rod 41 to achieve precise pressing or moving away from the clamping rubber strip 22. This effectively reduces the frictional loss between the rotating rod 42 and the chuck 7, improves the sensitivity and reliability of the clamping assembly 5, ensures the stable realization of the secondary self-clamping and self-loosening functions, extends the service life of the rotatable clamping assembly 54, and enhances the adaptability of the joint in complex construction environments.

[0064] In some specific embodiments, the inner wall of the groove of the clamp 7 is provided with an opening. Specifically, the inner wall of the groove of the clamp 7 is provided with an opening at the position where the first magnet 311, the third magnet 421, and the fourth magnet 422 interact, which effectively solves the problem of the clamp 7 wall blocking magnetic coupling, ensuring that the first magnet 311 and the third magnet 421 can drive the rotating rod 42 to rotate counterclockwise without obstruction when opposite poles attract each other, realizing the secondary self-clamping function of the pressing rod 41 pressing down to clamp the rubber strip 22; at the same time, it ensures that the first magnet 311 and the fourth magnet 422 can smoothly push the rotating rod 42 to rotate clockwise when like poles repel each other, completing the secondary self-loosening action of the pressing rod 41 moving away from the clamping rubber strip 22.

[0065] This invention also provides a method for using the GXJ rubber waterstop 6-joint, based on the aforementioned variable pressure self-clamping and self-releasing GXJ rubber waterstop 6-joint, including the following steps:

[0066] The air inside the cavity 11 of the elliptical hollow rubber body 1 is extracted to create negative pressure.

[0067] Insert one side of the elliptical hollow rubber body 1 of the GXJ rubber waterstop 6 (the side with the anti-mud component 2) into the movable clamping part 31 in the groove of the clamp 7. The limiting rubber body 61 at the end of the GXJ rubber waterstop 6 achieves one self-clamping of the GXJ rubber waterstop 6 through the clamping plate 51 and under the squeezing action of the elastic part 52.

[0068] The movable clamping member 31 is moved so that the first magnet 311 and the third magnet 421 are close together, and the elliptical hollow rubber body 1 does not contact the movable clamping member 31. The first magnet 311 and the third magnet 421 attract each other through opposite poles, causing the rotating rod 42 to rotate counterclockwise, which drives the pressing rod 41 to rotate and press down to clamp the rubber strip 22, thus achieving secondary self-clamping.

[0069] After the first concrete wall section (i.e., the first trench section 81) is poured, air is filled into the cavity 11, causing the elliptical hollow rubber body 1 to expand. The expanded elliptical hollow rubber body 1 compresses the movable clamping member 31, causing the second magnet 312 on it to attract the clamping plate 51, thus achieving the first self-release of the GXJ rubber waterstop 6 in the clamping state. At the same time, the first magnet 311 and the fourth magnet 422 repel each other, causing the rotating rod 42 to rotate clockwise, causing the lower pressure rod 41 to move away from the clamping rubber strip 22, thus achieving the second self-release.

[0070] Specifically, the method of using the GXJ rubber waterstop 6 joint of the present invention includes the following steps:

[0071] Step 1: Pre-installation preparation stage

[0072] The cavity 11 inside the elliptical hollow rubber body 1 is created under negative pressure by evacuating air. Under negative pressure, the volume of the hollow rubber body shrinks, the elliptical structure becomes more compact, and the overall rigidity is enhanced. This design can significantly improve the waterstop's ability to resist the impact of concrete pouring and the external forces during hoisting and installation, ensuring its shape stability during transportation, hoisting, and initial positioning, and avoiding the risk of seal failure due to deformation caused by external forces.

[0073] Step Two: One-time self-clamping fixation stage

[0074] One side of the elliptical hollow rubber body 1 of the GXJ rubber waterstop 6 is inserted into the movable clamping member 31 within the groove of the clamp 7. At this time, the limiting rubber body 61 at the end of the waterstop passes through the inclined clamping plate 51. Under the compression of the internal elastic element 52 (such as a spring), the clamping plate 51 undergoes directional displacement along the inclined surface, applying a uniform and stable clamping force to the waterstop. This process requires no manual intervention and achieves self-clamping through the self-adaptive nature of the mechanical structure, ensuring the initial fixation reliability of the GXJ rubber waterstop 6 before concrete pouring and effectively preventing displacement caused by vibration during the pouring process.

[0075] Step 3: Secondary self-clamping fixation stage

[0076] The movable clamping member 31 is moved further, bringing the first magnet 311 and the third magnet 421 closer together (they are opposite magnetic poles). Driven by magnetic attraction, the rotating rod 42 rotates counterclockwise, causing the pressing rod 41 to press down and clamp the rubber strip 22. The secondary self-clamping works synergistically with the primary self-clamping, enhancing the redundancy of the clamping force on the one hand, and dispersing the vibration and impact loads during concrete pouring through multi-point force application, thereby improving the anti-loosening ability of GXJ rubber waterstop 6 in high-pressure concrete environments and avoiding the risk of leakage at the joint due to clamping failure.

[0077] Step 4: Construction of Section 81 of the trench first

[0078] The reinforcing cage of the first section 81 is lowered, and the reinforced concrete of this section is poured. At this time, the GXJ rubber waterstop 6 is in a double self-clamping state, which can effectively block the high-pressure water flow and aggregate impact generated during the concrete pouring process, and prevent mud from entering the groove of the clamp 7, thus providing a stable foundation for subsequent construction.

[0079] Step 5: One-time self-loosening stage

[0080] After the initial concrete wall section is poured, air is injected into the elliptical hollow rubber body 1 through the air inlet valve of cavity 11. As the internal air pressure increases, the elliptical hollow rubber body 1 gradually expands, and its expansion force compresses the movable clamping member 31 downwards. When the movable clamping member 31 moves to a specific position, the second magnet 312 is attracted to the corresponding position of the clamping plate 51 (ferromagnetic steel plate), attracting the clamping plate 51 away from the GXJ rubber waterstop 6. This self-release process relies entirely on the self-expansion of the rubber body and the magnetic attraction, without the need for external force assistance, thus avoiding the problem of local stress concentration in the GXJ rubber waterstop 6 that may be caused by traditional disassembly tools.

[0081] Step Six: Secondary Self-Loosening Stage

[0082] During the continuous expansion of the elliptical hollow rubber body 1, the first magnet 311 and the fourth magnet 422 generate a repulsive force due to the repulsion of like poles, driving the rotating rod 42 to rotate clockwise and causing the pressing rod 41 to move away from the clamping rubber strip 22. On the one hand, the magnetic repulsive force further releases the clamping state of the clamping components, and on the other hand, it ensures that the clamping rubber strip 22 completely detaches from the surface of the GXJ rubber waterstop 6 when the joint is separated later, realizing the complete separation of the GXJ rubber waterstop 6 from the joint assembly and eliminating the risk of tearing of the GXJ rubber waterstop 6 that may be caused by traditional disassembly methods.

[0083] Step 7: Connector Separation

[0084] With its dual self-loosening action, the GXJ rubber waterstop's 6-joint detachment is easily and smoothly separated from the main body of the waterstop. The entire process requires no additional external force, making it simple and efficient to operate. This avoids mechanical damage to the waterstop during separation, extends its service life, and improves construction efficiency.

[0085] Step 8: Construction of the rear section 82

[0086] The reinforcing cage for the rear section 82 is lowered, and the reinforced concrete for the rear section 82 is poured. At this point, the GXJ rubber waterstop 6 has completely detached from the joint and can freely adapt to the installation requirements of the rear section 82, ensuring continuous sealing at the joint and ultimately forming a complete waterproof system.

[0087] This method solves the technical problems of low fixation reliability and difficult separation of traditional waterstop joints through the dual action of negative pressure contraction fixation and air pressure expansion release. It realizes the fully automated control of the installation and disassembly process of GXJ rubber waterstop 6, improves the construction quality and waterproof reliability of underground continuous wall joint waterstop system, and reduces construction difficulty and labor costs.

[0088] The above are merely optional embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-clamping and self-releasing GXJ rubber waterstop joint of variable pressure, characterized in that, include: Elliptical hollow rubber body (1): set on GXJ rubber waterstop (6), with a cavity (11) inside. Clamping assembly (5): disposed on the inner wall of the groove of the clamp (7), including clamping plate (51) and elastic element (52); one end of the elastic element (52) is fixedly connected to the inner wall of the groove of the clamp (7), and the other end is fixedly connected to the clamping plate (51); the clamping plate (51) clamps and fixes the GXJ rubber waterstop (6) by the compression of the elastic element (52), realizing one-time self-clamping; Movable clamping member (31): used to clamp GXJ rubber waterstop (6), and a first magnet (311) and a second magnet (312) are provided thereon; when the elliptical hollow rubber body (1) expands, the movable clamping member (31) is squeezed and moved downward, and the second magnet (312) is attracted to the clamping plate (51), so that the clamping plate (51) is away from the GXJ rubber waterstop (6), and the self-release is achieved in one step; Mud-proof component (2): includes mud-proof rubber strip (21) and clamping rubber strip (22); one end of the mud-proof rubber strip (21) is inclinedly disposed on one side of the elliptical hollow rubber body (1), and the other end is fixedly connected to the clamping rubber strip (22) to increase the area covering the top of the clamp (7) and to drain the mud away from the groove inside the clamp; the other end of the clamping rubber strip (22) contacts the top of the clamp (7) to prevent mud from entering; Rotatable clamping assembly (4): includes a pressing rod (41) and a rotating rod (42); one end of the pressing rod (41) abuts against the clamping rubber strip (22), and the other end is rotatably connected to the rotating rod (42); the rotating rod (42) is provided with a third magnet (421) and a fourth magnet (422); wherein: When the movable clamping part (31) is moved and the elliptical hollow rubber body (1) is not in contact with the movable clamping part (31), the first magnet (311) and the third magnet (421) attract each other by opposite poles, causing the rotating rod (42) to rotate counterclockwise, which drives the pressing rod (41) to press down and clamp the rubber strip (22) for clamping and fixing, thus achieving secondary self-clamping; When the elliptical hollow rubber body (1) expands and squeezes the movable clamping part (31) to move down, the first magnet (311) and the fourth magnet (422) repel each other, causing the rotating rod (42) to rotate clockwise, which drives the pressing rod (41) away from the clamping rubber strip (22) and realizes secondary self-loosening.

2. The GXJ rubber waterstop joint according to claim 1, characterized in that, The movable clamping member (31) is movably supported on the inner wall of the groove of the clamp (7) by the support member (32). The support member (32) is a guide rail and guide groove matching structure and is set perpendicular to the base plate (9).

3. The GXJ rubber waterstop joint according to claim 1, characterized in that, The movable clamping member (31) has a bending component at one end near the clamping plate (51).

4. The GXJ rubber waterstop joint according to claim 1, characterized in that, The clamping plate (51) includes an inclined portion and a horizontal clamping portion. The inclined portion is configured to cooperate with the inclined surface of the limiting rubber body (61) at the end of the GXJ rubber waterstop (6). The horizontal clamping portion is used to clamp the GXJ rubber waterstop (6).

5. The GXJ rubber waterstop joint according to claim 1, characterized in that, An isolation rubber sheet (13) is provided in the middle of the cavity (11) to divide the cavity (11) into a first chamber and a second chamber; a shear groove (131) is provided on the isolation rubber sheet (13); one of the first chambers or the second chamber is filled with water-swellable rubber beads (12).

6. The GXJ rubber waterstop joint according to claim 1, characterized in that, The GXJ rubber waterstop (6) includes a ribbed rubber body (62) and a water-swellable rubber body (63), and the height ratio of the ribbed rubber body (62) to the water-swellable rubber body (63) is (3-4):

1.

7. The GXJ rubber waterstop joint according to claim 2, characterized in that, The guide rail and guide groove are spaced apart.

8. The GXJ rubber waterstop joint of claim 1, wherein, The rotatable clamping assembly (4) further includes a rotating component (43), which is disposed on the chuck (7), and the rotating rod (42) is rotatably connected through the rotating component (43).

9. The GXJ rubber waterstop joint according to claim 1, characterized in that, The groove inner wall of the clamp (7) is provided with an opening.

10. A method of using a GXJ rubber flashing band head, characterized in that, The GXJ rubber waterstop joint based on any one of claims 1 to 9 includes the following steps: The air inside the cavity (11) of the elliptical hollow rubber body (1) is extracted to create a negative pressure; Insert one side of the elliptical hollow rubber body (1) of the GXJ rubber waterstop (6) into the movable clamping member (31) in the groove of the clamp (7). The limiting rubber body (61) at the end of the GXJ rubber waterstop (6) achieves one-time self-clamping of the GXJ rubber waterstop (6) under the squeezing action of the elastic member (52) through the clamping plate (51). The movable clamping member (31) is moved so that the first magnet (311) and the third magnet (421) are close together, and the elliptical hollow rubber body (1) does not contact the movable clamping member (31). The first magnet (311) and the third magnet (421) attract each other through opposite poles, causing the rotating rod (42) to rotate counterclockwise, which drives the pressing rod (41) to rotate and press down to clamp the rubber strip (22), thus achieving secondary self-clamping. After the concrete wall section is poured, air is filled into the cavity (11) to expand the elliptical hollow rubber body (1). The expanded elliptical hollow rubber body (1) squeezes the movable clamping part (31) to move, so that the second magnet (312) on it attracts the clamping plate (51), realizing the first self-release of the GXJ rubber waterstop (6) in the clamping state. At the same time, the first magnet (311) and the fourth magnet (422) repel each other to make the rotating rod (42) rotate clockwise, so that the lower pressure rod (41) moves away from the clamping rubber strip (22), realizing the second self-release.

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