A composite slab joint waterproofing and seepage prevention structure

Abstract

This invention discloses a waterproof and seepage-proof structure for composite slab joints, relating to the field of composite slab joint connection technology in prefabricated buildings. The structure includes a first composite plate and a second composite plate, both internally pre-formed with reinforcing bars and topped with first bolts. The sidewalls of both the first and second composite plates facing the joint are convex. A connecting concave plate is provided within the joint, comprising an integrally formed upper convex bottom plate and inner concave side plates. The tops of the two inner concave side plates are provided with integrally formed first transverse ribs, and the bottom of the connecting concave plate has a through groove for the reinforcing bars to pass through. In this invention, the convex sidewalls of the composite plates and the connecting concave plate form curved surfaces that mutually support each other, increasing the contact area and reducing initial leakage gaps. The connecting concave plate can adapt to deformation under stress and maintain a tight fit, while the first transverse ribs ensure its top rigidity, achieving both structural stability and foundation sealing.

Description

Technical Field

[0001] This invention belongs to the field of prefabricated building composite slab splicing technology, specifically, it relates to a waterproof and seepage-proof structure for composite slab splicing. Background Technology

[0002] The wide joint area between composite slabs serves as a buffer zone for structural settlement and shrinkage. The joint is wide and subjected to complex stresses, requiring extremely high water-stopping and seepage prevention performance, making it a key challenge in the construction of prefabricated buildings.

[0003] Currently, the mainstream construction process for wide joint areas in composite slabs is to fill with reinforcing cages and passively seal them. The core relies on materials such as sealant and waterstop strips to fill the gaps. However, due to the dynamic deformation of the wide joint area and the grouting pressure, the sealing structure is prone to problems such as loose fit, aging and detachment, and the risk of leakage is significantly higher than that of conventional narrow joint areas. At the same time, traditional sealing methods are mostly passive sealing, lacking active pre-tightening and dynamic adaptation capabilities, and cannot cope with the complex stress environment of the wide joint area, resulting in insufficient sealing reliability. In view of the above problems, a water-stopping and seepage prevention structure for composite slab joints is proposed here. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a composite slab joint waterproofing and seepage prevention structure that can overcome or at least partially solve the above problems.

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0006] A composite slab joint waterproofing and seepage prevention structure includes a first composite plate and a second composite plate, both with internally pre-embedded reinforcing bars and topped with first bolts. The sidewalls of both the first and second composite plates facing the joint are convex. A connecting concave plate is provided within the joint, comprising an integrally formed upper convex bottom plate and inner concave side plates. The tops of the two inner concave side plates are provided with integrally formed first transverse reinforcing bars, and the bottom of the connecting concave plate has a through-groove for the reinforcing bars to pass through. The connecting concave plate is fixedly connected to the first bolts. The structure also includes an anchoring pre-tightening component, a seepage prevention and maintenance component, and a sealing component. Two sets of the seepage prevention and maintenance components are respectively located at the connection points between the first and second composite plates and the top of the connecting concave plate. The sealing component is fitted onto the reinforcing bars and seals the through-groove. The anchoring pre-tightening component, when fixed to the reinforcing bars, provides fixation to the sealing component.

[0007] Furthermore, the end of the reinforcing bar extending to the inner side of the connecting concave plate is provided with a connecting thread. When the anchoring pre-tightening assembly is tightened, a centripetal pre-tightening force towards the center of the joint is applied to the first and second composite plates through the connecting thread. At the same time, driven by the anchoring pre-tightening assembly, the central area of ​​the concave side plate moves radially closer to the convex surface of the corresponding side composite plate, so that the central part of the concave side plate is pressed against the convex surface of the composite plate. The top of the connecting concave plate is kept in position under the limiting action of the first transverse rib, and the top edge of the connecting concave plate moves towards the top of the corresponding side composite plate, forming a squeeze on the seepage prevention operation and maintenance assembly. The upper convex bottom plate arches upward as the concave side plate contracts, and the connection between the upper convex bottom plate and the concave side plate of the connecting concave plate synchronously fits against the convex surface of the adjacent composite plate with the displacement.

[0008] Furthermore, during grouting, under the pressure of grouting, the middle part of the convex bottom plate shifts downward, and the deformation caused by the downward shift simultaneously drives the bottom edge of the concave side plate to shift towards the convex surface of the composite plate; the middle area of ​​the concave side plate moves towards the convex surface of the composite plate and presses against it simultaneously with the bottom edge displacement; the top of the concave side plate remains in a fixed position under the constraint of the first transverse reinforcement; the connection between the convex bottom plate and the concave side plate is tightened simultaneously with the displacement; the two ends of the convex bottom plate are pulled towards the outside of the joint following the bottom edge displacement of the concave side plate; and the concrete exerts pressure on the anchoring pre-tightening assembly, which exerts a secondary pre-tightening force on the first and second composite plates under the action of the concrete pressure.

[0009] Preferably, a connecting wing plate is fixedly installed on the top of the concave side plate, and the connecting wing plate is provided with a first insertion hole that mates with the first bolt. The connecting wing plate is fixedly connected to the first bolt by a nut.

[0010] Preferably, the seepage prevention operation and maintenance component includes an expansion strip and a seepage drainage pipe disposed within the expansion strip. The top of the side of the first composite plate and the second composite plate with a convex surface is provided with a first slot, the expansion strip is snapped into the first slot, and the expansion strip is provided with a sixth insertion hole coupled to the first bolt.

[0011] Preferably, the sealing assembly includes a fixed angle plate, on which a first sealing angle plate is snapped, and the first sealing angle plate is provided with an integrally formed second sealing angle plate, the second sealing angle plate fitting into the through groove; the fixed angle plate, the first sealing angle plate, and the second sealing angle plate are all provided with a fourth insertion hole and a fifth insertion hole, the reinforcing bar passes through the fifth insertion hole and is fixed to the concave side plate through an anchoring pre-tightening assembly, and the second bolt passes through the fourth insertion hole and is fixed by a nut; when the anchoring pre-tightening assembly fixes the fixed angle plate, the fixed angle plate and the concave side plate cooperate to compress the first sealing angle plate; when the nut and the second bolt fix the fixed angle plate, the fixed angle plate and the convex bottom plate cooperate to compress the first sealing angle plate.

[0012] Preferably, the anchoring pre-tightening assembly includes two symmetrically arranged anchor heads and at least three steel strands. The two ends of the steel strands are fixedly connected to the anchor heads respectively. The two sets of anchor heads are respectively threadedly connected to the connecting threads of two sets of reinforcing bars on the first and second composite plates. When tightening the two anchor heads, the two anchor heads rotate in opposite directions, and the at least three steel strands twist together with the anchor heads as they rotate, forming a tightened state. The steel strands apply a tension force to the anchor heads through twisting and tightening, and the anchor heads apply a centripetal pre-tightening force to the reinforcing bars toward the center of the joint.

[0013] Preferably, the anchor head includes a threaded sleeve with an integrally formed hexagonal threaded head at one end. An integrally formed anchor claw is provided on the outer wall of the threaded sleeve. The end of the anchor claw away from the threaded sleeve is inclined towards the concave side plate. A second groove is provided at the end of the threaded sleeve that is in contact with the fixed angle plate. A sealing ring is engaged in the second groove. During the tightening process of the anchor head, the threaded sleeve and the fixed angle plate cooperate to compress the sealing ring.

[0014] Preferably, the device further includes a reinforcing component, which includes a second transverse rib. Both ends of the second transverse rib are provided with second insertion holes, which are coupled to a first bolt. A pressure post is fixedly installed at the bottom of the second transverse rib, and the pressure post abuts against the middle end of the upper surface of the horizontal plate of the fixed corner plate.

[0015] Preferably, the pressure column is provided with a third insertion hole, and a longitudinal steel bar is inserted into the third insertion hole. The longitudinal steel bar and the pressure column are solidified together by grouting to form concrete.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0017] 1. In this invention, the convex sidewall of the composite plate and the connecting concave plate form curved surfaces that fit together, increasing the contact area and reducing the initial leakage gaps; the connecting concave plate can adapt to deformation under force and maintain a tight fit, and the first transverse rib ensures its top rigidity, achieving the dual effects of structural stability and foundation sealing.

[0018] 2. In this invention, the connecting concave plate adopts an integrated structure of an upper convex bottom plate and an inner concave side plate, which has sufficient rigidity and elastic deformation capability, and can adapt to dynamic changes in grouting pressure and pre-tightening force; the first transverse rib restricts excessive deformation of the top of the inner concave side plate and ensures spacing accuracy; the through groove precisely matches the reinforcing rib, solving the connection problem between the connecting concave plate and the reinforcing rib after installation, eliminating the need to disassemble and adjust the reinforcing rib, avoiding its repeated bending, and realizing the interlocking connection of the structure, establishing the pre-tightening force transmission path, and providing a positioning foundation for the sealing component.

[0019] 3. In this invention, the anchoring pre-tightening component provides uniform centripetal pre-tightening force by twisting and tightening steel strands, which counteracts concrete shrinkage stress and inhibits joint cracking. The pre-tightening force is controllable and the force transmission is direct. The anchor claws enhance the interlocking force with the concrete, and the sealing ring seals local gaps, thus having both reinforcement and seepage prevention functions. At the same time, the pre-tightening force compresses the expansion strip to strengthen the top seal and compresses the fixed corner plate to achieve pre-tightening and sealing. The pre-tightening force is transmitted through the reinforcing bar to bring the composite plates together and drive the connecting concave plate to adhere to the composite plates to form a dynamic seal.

[0020] 4. In this invention, the sealing component adopts a composite structure of rigid fixed corner plate and elastic sealing corner plate, which seals the gaps around the through groove and the reinforcing bar in all directions. The double compression makes the force uniform, and the elastic material adapts to the slight deformation of the structure, which eliminates the bottom leakage from the source and is easy to install.

[0021] 5. In this invention, the seepage prevention and maintenance component achieves a flexible top seal through an expansion strip, which expands upon contact with water to further seal the gaps. The built-in seepage drainage pipe collects and drains seepage water, facilitating later maintenance and achieving integrated sealing, diversion, and repairability.

[0022] 6. In this invention, the reinforcing component forms a rigid skeleton through lateral support, vertical compression and longitudinal steel reinforcement, which improves the shear resistance and load-bearing capacity of the joint. The compression column continuously presses the sealing component to prevent it from warping and shifting, while uniformly pressing the middle of the fixed corner plate to ensure the sealing part is dense and improve the rigidity of the sealing area.

[0023] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0024] In the attached diagram:

[0025] Figure 1 This is a three-dimensional structural diagram of a composite slab joint waterproofing and seepage prevention structure proposed in this invention.

[0026] Figure 2 This is a top view of a composite slab joint waterproofing and seepage prevention structure proposed in this invention;

[0027] Figure 3 This is a front view of a composite slab joint waterproofing and seepage prevention structure proposed in this invention;

[0028] Figure 4 This is a main sectional view of a composite slab joint waterproofing and seepage prevention structure proposed in this invention;

[0029] Figure 5 This is a schematic diagram of the composite slab structure for a water-stopping and seepage-proofing structure for the joints of composite slabs proposed in this invention.

[0030] Figure 6 This is a schematic diagram of the connecting concave plate of a composite slab joint waterproofing and seepage prevention structure proposed in this invention;

[0031] Figure 7 This is a schematic diagram of the reinforced component of a composite slab joint waterproofing and seepage prevention structure proposed in this invention.

[0032] Figure 8 This is a schematic diagram of the seepage prevention and maintenance component of a composite slab joint water-stopping and seepage prevention structure proposed in this invention.

[0033] Figure 9 This is a schematic diagram of the anchoring pre-tightening component of a composite slab joint waterproofing and seepage prevention structure proposed in this invention. Figure 1 ;

[0034] Figure 10 This is a schematic diagram of the anchoring pre-tightening component of a composite slab joint waterproofing and seepage prevention structure proposed in this invention. Figure 2 ;

[0035] Figure 11 This is a schematic diagram of the sealing component of a composite slab joint waterproofing and seepage prevention structure proposed in this invention.

[0036] In the diagram: 1. First composite plate; 11. Second composite plate; 12. Beard rib; 121. Connecting thread; 13. First bolt; 14. Convex surface; 15. First slot; 2. Connecting concave plate; 21. Upper convex bottom plate; 22. Inner concave side plate; 23. Connecting wing plate; 24. Through slot; 25. Second bolt; 26. First transverse rib; 27. First insertion hole; 3. Anchor head; 31. Threaded sleeve; 311. Hexagonal bolt head 312, Anchor claw; 313, Second slot; 32, Steel strand; 33, Sealing ring; 4, Reinforcing component; 41, Second transverse reinforcement; 42, Anti-compression column; 43, Second insertion hole; 44, Third insertion hole; 5, Fixing angle plate; 51, First sealing angle plate; 52, Second sealing angle plate; 53, Fourth insertion hole; 54, Fifth insertion hole; 6, Longitudinal reinforcement; 7, Expansion strip; 71, Sixth insertion hole; 8, Drainage pipe. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0038] Example: Refer to Figures 1-11 A waterproof and seepage-proof structure for composite slab joints is designed to address the core waterproofing and seepage-proofing needs of composite slab splicing in prefabricated buildings. It combines factory prefabrication with on-site assembly. Through the foundation adaptation of the first composite slab 1, the second composite slab 11, and the connecting concave plate 2, and with the functional synergy of anchoring pre-tightening components, seepage-proofing maintenance components, and sealing components, it achieves both structural reinforcement and waterproofing / seepage-proofing at the joints. This effectively solves problems such as weak sealing, poor deformation adaptability, and insufficient pre-tightening effect in traditional splicing processes. Specifically:

[0039] Reference Figures 1-5 The first composite plate 1 and the second composite plate 11 are prefabricated assembly core components in the factory. Both have embedded reinforcing bars 12 inside. The ends of the reinforcing bars 12 extending to the joint area are machined with connecting threads 121 to provide a connection basis for subsequent pre-tightening force transmission. The top of both composite plates has embedded first bolts 13 as fixed connection nodes between each component and the composite plate. The side walls of both facing the joint are prefabricated as convex surfaces 14, abandoning the traditional flat or grooved side wall design, and providing a geometric adaptation basis for precise fitting and tight sealing with the connecting concave plate 2.

[0040] Among them, the prefabricated connecting thread 121 at the end of the reinforcing bar 12 establishes a rigid and continuous pre-tightening force transmission path in advance, so that the centripetal pre-tightening force applied by the anchoring pre-tightening component can be directly and efficiently transmitted to the main body of the first composite plate 1 and the second composite plate 11, avoiding force transmission loss and connection failure, ensuring the actual effect of active pre-tightening, effectively offsetting the shrinkage stress difference between new and old concrete, and structurally suppressing the generation of micro-cracks in the joint; at the same time, the standardized prefabricated thread structure in the factory replaces the traditional on-site processing method, reduces on-site construction errors, and provides a reliable foundation for the precise docking of the anchoring pre-tightening component.

[0041] Among them, the first bolt 13 pre-embedded on the top of the composite plate serves as a unified fixed connection node between each functional component and the first composite plate 1 and the second composite plate 11. It can simultaneously realize the precise fixing and positioning of components such as the connecting concave plate 2, the seepage prevention and maintenance component, and the reinforcing component 4, avoiding the positional deviation and poor coordination caused by fixing each component individually. It allows multiple components to form an orderly cooperation based on it, achieving full-area coordinated sealing of the joint. Moreover, the precision of the prefabricated bolt nodes in the factory is controllable, which greatly improves the efficiency of on-site assembly and reduces the risk of weak connection caused by on-site addition of components.

[0042] Among them, the sidewall of the composite plate facing the joint is prefabricated as a convex surface 14: abandoning the traditional flat / grooved sidewall design, it adopts a mutual fit with the concave surface of the side plate of the connecting concave plate 2, which greatly increases the contact area between the first composite plate 1, the second composite plate 11 and the connecting concave plate 2, reducing the initial leakage gap from a geometric structure perspective and increasing the stability between the connecting concave plate 2 and the composite plate; at the same time, the curved surface fit form can achieve more uniform stress transmission when subjected to pre-tightening force and grouting pressure, avoiding the fit gap caused by local stress concentration, and providing a solid geometric fit condition for the sealing of the joint foundation.

[0043] Among them, the reinforcing bar 12, connecting thread 121, first bolt 13, and convex surface 14 are prefabricated as a whole, so that all core structures are integrated with the first composite slab 1 and the second composite slab 11 in the factory, forming a solid overall structure and avoiding the problem of weak connection between the on-site added components and the main body of the composite slab. When the composite slab is subjected to pre-tightening force, grouting pressure, and service load, each prefabricated structure can work together to bear the force, which not only improves the structural rigidity of the composite slab itself in the joint area, but also forms a closer synergistic cooperation with the connecting concave plate 2 and various functional components, realizing the simultaneous linkage of structural reinforcement and waterproofing. Therefore, since all core connection nodes and fitting structures are prefabricated in the factory, only precise docking and assembly of components are required on site, which greatly reduces on-site wet work and manual operation, reduces the impact of on-site construction accuracy on joint sealing and structural connection effect, perfectly adapts to the core construction concept of prefabrication in the factory and assembly on site, and ensures the stability and consistency of project quality.

[0044] Reference Figure 1 , Figure 3 and Figure 6 The connecting concave plate 2 includes an upper convex bottom plate 21 and inner concave side plates 22 fixedly installed on both sides of the upper convex bottom plate 21. A connecting wing plate 23 is fixedly installed on the top of both inner concave side plates 22. A first transverse rib 26 is integrally formed between the tops of the two inner concave side plates 22. A first insertion hole 27 is opened on the connecting wing plate 23 to match the first bolt 13 pre-embedded on the top of the first composite plate 1 and the second composite plate 11. The lower plate of the upper convex bottom plate 21 and the inner concave side plate 22 are provided with a through groove 24 for the rib 12 to pass through.

[0045] Among them, the convex bottom plate 21 is the bottom main structure connecting the concave plate 2. It is convex upward and can arch with the contraction of the concave side plate 22. It can also move downward under grouting pressure, causing the concave side plate 22 to further fit the convex surface 14 of the composite plate, realizing dynamic sealing of the main surface of the joint, and allowing the sealing effect to be adaptively optimized according to the construction stress state. At the same time, it can cooperate with the fixed corner plate 5 to squeeze the first sealing corner plate 51 of the sealing component to enhance the sealing effect at the through groove 24. The convex bottom plate 21 can be an convex arc plate or an convex "∧" plate. The included angle of the convex "∧" plate is 170°-178°.

[0046] Among them, the concave side plate 22 is a side plate structure symmetrically arranged on the side of the convex bottom plate 21. The concave structure can be an arc structure or an angle structure of ">" and "<" with an included angle of 170°-178°. The concave structure matches the convex surface 14 of the first composite plate 1 and the second composite plate 11. Under the action of anchoring pre-tightening force and grouting pressure, it can radially approach and press against the convex surface 14 of the composite plate to form a basic seal on the main surface of the joint.

[0047] The connecting wing plate 23 is an extension structure fixedly installed on the top of the concave side plate 22. It is the connecting component between the connecting concave plate 2 and the first bolt 13 on the top of the composite plate. It connects with the first bolt 13 through the first insertion hole 27 on it and cooperates with the nut to achieve a firm positioning of the connecting concave plate 2 in the joint, so that the connecting concave plate 2 and the composite plate form a firm connection relationship, preventing the connecting concave plate 2 from shifting during construction and use, and ensuring the overall structural stability of the joint.

[0048] The through slot 24 is a through-hole structure opened in the lower part of the upper convex bottom plate 21 and the inner concave side plate 22. The size of the slot is adapted to the outer diameter of the reinforcing bar 12. It is specially designed for the reinforcing bars 12 pre-embedded in the first composite plate 1 and the second composite plate 11 to pass through, so as to realize the structural interlocking connection between the composite plate and the connecting concave plate 2. It establishes a rigid and continuous force path for the pre-tightening force transmission of the anchoring pre-tightening component, so that the centripetal pre-tightening tension applied by the anchoring pre-tightening component can be efficiently transmitted to the composite plate body through the reinforcing bar 12. At the same time, the through slot 24 provides a precise positioning foundation for the installation of the sealing component. With the squeezing action of the upper convex bottom plate 21 and the fixed corner plate 5, it achieves all-round sealing from the periphery of the slot, sealing the leakage gap at the through point of the reinforcing bar 12, and taking into account the dual functions of structural connection and anti-seepage sealing.

[0049] The first transverse rib 26 is an integrally formed transverse reinforcing rib structure between the tops of the two concave side plates 22. As a top stiffness reinforcement component of the connecting concave plate 2, it can significantly improve the overall structural strength and deformation resistance of the top of the connecting concave plate 2, effectively limit the radial excessive shrinkage deformation and tensile deformation generated by the top of the concave side plate 22 under the action of anchoring pre-tightening force, and ensure the top positioning stability of the connecting concave plate 2 in the joint; at the same time, it can maintain the spacing accuracy of the two concave side plates 22, avoid the failure of the joint top sealing connection due to the deformation of the top of the side plates, ensure the continuous compression sealing effect of the top edge of the connecting concave plate 2 on the anti-seepage operation and maintenance component, and take into account the dual requirements of structural rigidity and sealing stability.

[0050] The first insertion hole 27 is a precise fitting through hole opened on the connecting wing plate 23. The hole diameter matches the size of the first bolt 13 pre-embedded in the top of the first composite plate 1 and the second composite plate 11. It provides a precise installation channel for the docking of the connecting wing plate 23 and the first bolt 13, ensuring the alignment accuracy of the connecting concave plate 2 and the composite plate, and avoiding leakage gaps caused by the incomplete fit between the concave side plate 22 and the convex surface 14 of the composite plate due to docking deviation. At the same time, the connecting concave plate 2 and the composite plate can be quickly mechanically fixed by the insertion hole and the nut. The assembly operation is convenient and adapts to the construction concept of prefabrication in the factory and dry assembly on site in prefabricated buildings. It can also make the connecting wing plate 23 and the first bolt 13 form a firm connection and prevent the connecting concave plate 2 from vertical or lateral displacement during construction and use, further ensuring the stability of the overall structure of the joint.

[0051] Reference Figure 4 , Figure 9 and Figure 10 The anchoring pre-tightening assembly includes two symmetrically arranged anchor heads 3 and at least three steel strands 32. The two ends of the steel strands 32 are fixedly connected to the two anchor heads 3 respectively. The anchor heads 3 are precisely threaded with the connecting threads 121 of the ends of the reinforcing bars 12 of the first composite plate 1 and the second composite plate 11, providing an active and controllable centripetal pre-tightening force at the joint. It is the core functional component for realizing active sealing of the joint and offsetting concrete shrinkage stress. It can drive the connecting concave plate 2 to adapt to deformation through mechanical operation, and at the same time squeeze and fix the sealing assembly to achieve the linkage effect of pre-tightening and sealing.

[0052] Among them, the anchor head 3 is the core component for force transmission and operation of the anchoring pre-tightening assembly, including a threaded sleeve 31, a hexagonal screw head 311 integrally formed on the end of the threaded sleeve 31, at least three anchor claws 312 integrally formed on the outer wall of the threaded sleeve 31, and a sealing ring 33 snapped into the end of the threaded sleeve 31.

[0053] The threaded sleeve 31 has an internal thread that matches the connecting thread 121 of the reinforcing bar 12, providing a basis for the precise docking of the anchor head 3 and the reinforcing bar 12 and the efficient transmission of force; the hexagonal screw head 311 provides a standardized operation interface for on-site construction, which can be adapted to conventional torque wrenches and other tools to achieve synchronous tightening of the two anchor heads 3 in opposite directions. The operation is convenient and the pre-tightening force is controllable, which can accurately control the pre-tightening effect of the joint.

[0054] The end of the anchor claw 312 away from the threaded sleeve 31 is inclined toward the concave side plate 22. During the tightening process of the anchor head 3, the anchor claw 312 can gradually press against the concave side plate 22, assisting the concave side plate 22 to radially approach the convex surface 14 of the composite plate, strengthening the bonding and pressing effect between the concave side plate 22 and the convex surface 14, and at the same time increasing the mechanical interlocking force between the anchor head 3 and the grouting concrete, thereby improving the anchoring stability of the anchor head 3.

[0055] The threaded sleeve 31 has a second groove 313 at the end that is in contact with the sealing component. The sealing ring 33 is engaged in the second groove 313. During the tightening process of the anchor head 3, the threaded sleeve 31 and the sealing component work together to uniformly compress the sealing ring 33, causing the sealing ring 33 to undergo elastic deformation, fully filling the gap between the threaded sleeve 31 and the fixed angle plate 5, achieving sealing and seepage prevention at the connection between the anchor head 3 and the sealing component, blocking the leakage channel at this part, and taking into account the dual needs of force transmission and local sealing.

[0056] Among them, the steel strand 32 is a high-strength, low-relaxation steel strand 32, with at least three strands evenly distributed in a ring between the two anchor heads 3. Its two ends are fixedly connected to the anchor head 3 by pressing or wedge block anchoring. Alternatively, the ends of the steel strand 32 can be pre-embedded and inserted into the anchor head 3 during the integrated molding process of the anchor head 3 to form an integrated fixed structure. Both connection methods can achieve a firm connection between the steel strand 32 and the anchor head 3, ensure the tensile force transmission effect, avoid loosening or breaking under force, and effectively withstand the twisting tension generated by the reverse rotation of the anchor head 3, making it less prone to breakage or loosening.

[0057] When the two anchor heads 3 are rotated and tightened in opposite directions, the steel strands 32 twist and twist with the anchor heads 3 and form a tight state. The twisting and tightening generates a continuous and uniform axial tension force, which is transmitted to the reinforcing bar 12 through the anchor heads 3 and then converted into a centripetal pre-tightening force on the first composite plate 1 and the second composite plate 11, so as to pull the composite plates on both sides toward the middle of the joint.

[0058] The twisting and tightening method of multiple steel strands 32, compared with the tensioning of a single rib, allows the pre-tightening force to be transmitted more evenly to the anchor head 3, avoiding the anchor head 3 from tilting or the force transmission imbalance caused by local stress concentration, ensuring the symmetry and uniformity of the pre-tightening force, making the fit between the concave side plate 22 and the convex surface 14 of the composite plate more uniform, and improving the sealing effect of the main surface of the splice.

[0059] Meanwhile, the flexibility of the steel strand 32 can adapt to the slight deformation of the connecting concave plate 2, and maintain the tension force on the anchor head 3 during grouting pressure and concrete shrinkage, thus maintaining the pre-tightening state of the joint and achieving long-term sealing.

[0060] In summary, the anchoring pre-tightening assembly, through the threaded engagement of the anchor head 3 and the reinforcing bar 12, and the twisting and tightening of the steel strand 32, constructs a rigid and controllable pre-tightening force transmission system. The applied centripetal pre-tightening force not only pulls the first composite plate 1 and the second composite plate 11 closer together, reducing the joint gap, but also drives the inner concave side plate 22 of the connecting concave plate 2 to undergo adaptive deformation, tightly fitting with the convex surface 14 of the composite plate, achieving active sealing of the main surface of the joint. At the same time, during the application of the pre-tightening force, the anchor head 3 will compress the sealing assembly, thereby driving the sealing assembly to cooperate with the inner concave side plate 22 and the upper convex bottom plate 21, forming a continuous compression on the sealing assembly, achieving the linkage effect of pre-tightening and sealing. There is no need to operate the sealing assembly separately, simplifying the on-site construction process, improving assembly efficiency, and perfectly adapting to the construction needs of prefabricated buildings.

[0061] Reference Figure 1 , Figure 4 , Figure 6 and Figure 11 The sealing assembly includes a fixed corner plate 5, a first sealing corner plate 51 that snaps into the fixed corner plate 5, and a second sealing corner plate 52 that is integrally formed with the first sealing corner plate 51 and precisely matches the through groove 24 of the connecting concave plate 2. The fixed corner plate 5, the first sealing corner plate 51, and the second sealing corner plate 52 are each provided with a fourth insertion hole 53 for the second bolt 25 to pass through and a fifth insertion hole 54 for the reinforcing bar 12 to pass through. This assembly is sleeved on the outside of the reinforcing bar 12 and is adapted to seal the through groove 24. It is the core structure for preventing seepage at the bottom of the joint. It can achieve multi-dimensional sealing through the double compression of the anchoring pre-tightening assembly and the second bolt 25, sealing the leakage gap at the through groove 12, and at the same time, it cooperates with the connecting concave plate 2 to form a sealed barrier at the bottom of the joint.

[0062] Among them, the fixed angle plate 5 is a rigid support and compression base component of the sealing assembly. It is made of rigid metal material and retains a certain elasticity at the bend. Its overall shape is adapted to the angle between the upper convex bottom plate 21 and the inner concave side plate 22 of the connecting concave plate 2, and it has an angle structure that fits the contour of the part.

[0063] The rigid material ensures that it can provide a stable snap-fit ​​installation base for the first sealing corner plate 51, preventing the sealing corner plate from shifting or deforming under the action of grouting pressure and pre-tightening force. At the same time, as a force transmission carrier, it can uniformly convert the pre-tightening force of the anchoring pre-tightening component and the locking force of the second bolt 25 into the extrusion force on the first sealing corner plate 51.

[0064] The flexible design at the bend, combined with the structure that adapts to the angle of the connection, allows it to fit tightly against the joint between the convex bottom plate 21 and the concave side plate 22. It also adapts to the slight deformation of the connecting concave plate 2 and the stress changes at the joint, avoiding cracking due to excessive rigidity or excessive local compression of the sealing corner plate. While ensuring support stability, it improves the fit between the sealing component and the connecting concave plate 2. The fourth insertion hole 53 and the fifth insertion hole 54 are precisely matched with the second bolt 25 and the reinforcing rib 12, respectively, ensuring the alignment accuracy between the sealing component and the connecting concave plate 2 and the reinforcing rib 12. This allows the sealing component to fit precisely against the periphery of the through groove 24, providing structural guarantee for the sealing effect.

[0065] The first sealing corner plate 51 is made of an elastic waterproof material (such as EPDM rubber, nitrile rubber, water-swellable rubber, or polyurethane elastomer, etc.), and is snapped together with the fixed corner plate 5 to form a composite structure of rigid support and elastic sealing. It can undergo elastic deformation under the action of extrusion pressure, fully filling the gap between the fixed corner plate 5 and the connecting concave plate 2. Its integral molding design with the second sealing corner plate 52 ensures the integrity of the sealing component and avoids the leakage problem of the connection of the split structure. At the same time, the elastic material has good deformation adaptability and can adapt to the small deformation caused by concrete shrinkage and load at the joint, maintaining the sealing effect for a long time and not easily causing sealing failure due to slight structural changes.

[0066] Among them, the second sealing corner plate 52 is an adaptive structure that extends from the first sealing corner plate 51 into the through groove 24. It can be completely embedded in the through groove 24 to achieve full circumferential sealing of the through groove 24, thereby blocking the channels for grout to leak out of the through groove 24 and groundwater to seep in from the through groove 24 from the root. It is squeezed and deformed synchronously with the first sealing corner plate 51, and can form a seamless fit with the inner wall of the through groove 24 and the outer wall of the composite plate, so that the weak part of the seepage prevention at the bottom of the through groove 24 is sealed without dead angles.

[0067] Among them, the fourth insertion hole 53 and the fifth insertion hole 54 are precision alignment through holes on the sealing component. The hole diameters are adapted to the shank of the second bolt 25 and the outer diameter of the reinforcing bar 12, respectively. This ensures the smooth insertion of the second bolt 25 and the reinforcing bar 12, and also allows the elastic sealing material to self-seal the gap between the bolt, the reinforcing bar and the insertion hole through micro-deformation, preventing the formation of new leakage channels in this area. At the same time, the precise hole design allows the sealing component to be quickly fitted onto the reinforcing bar 12 and aligned with the second bolt 25, improving on-site assembly efficiency and meeting the needs of dry construction of prefabricated buildings.

[0068] In summary, the sealing assembly achieves a dual sealing effect through the bidirectional compression of the fixed angle plate 5, the concave side plate 22, and the convex bottom plate 21: when the anchoring pre-tightening assembly is tightened, the fixed angle plate 5 and the concave side plate 22 cooperate to form radial compression on the first sealing angle plate 51. The elasticity at the bend and the structure of the matching angle make the compression force more uniform, so that the second sealing angle plate 52 fits tightly against the inner wall of the groove 24 and the outer wall of the reinforcing bar 12; when the second bolt 25 is locked with the nut, the fixed angle plate 5 and the convex bottom plate 21 cooperate to form axial compression on the first sealing angle plate 51, further strengthening the tightness between the sealing angle plate and each mating surface; this assembly perfectly combines rigid support and elastic sealing, ensuring its own structural stability and achieving all-round, adaptive seepage prevention and sealing. At the same time, it forms a linkage with the anchoring pre-tightening assembly and the connecting concave plate 2, so that the sealing effect is optimized synchronously with the pre-tightening force and grouting pressure, completely solving the leakage problem at the bottom of the groove 24 of the joint.

[0069] Reference Figure 1 , Figure 3 and Figure 8 The seepage prevention and maintenance components include expansion strips 7 and seepage drainage pipes 8 embedded inside the expansion strips 7. Two sets of seepage prevention and maintenance components are arranged one-to-one at the connection points of the first composite plate 1, the second composite plate 11, the concave side plate 22, and the connecting wing plate 23. They are fitted and fixed with the first slot 15 on the top of the first composite plate 1 and the second composite plate 11. This is the core structure for seepage prevention and subsequent maintenance of the top of the joint. It can achieve active sealing of the top of the joint, guide potential seepage, facilitate maintenance, and take into account both seepage prevention effect and maintenance convenience.

[0070] The expansion strip 7 is made of an elastic, waterproof material, such as EPDM rubber, water-swellable rubber, nitrile rubber, or polyurethane elastomer. Its shape is adapted to the contour of the first slot 15 and the connection gap at the top of the connecting concave plate 2, and it can be tightly locked into the first slot 15 to form the first waterproof barrier at the top of the joint. The expansion strip 7 has a sixth insertion hole 71 that is precisely coupled to the first bolt 13. The hole diameter matches the size of the first bolt 13 shank, which not only ensures that the first bolt 13 can be smoothly inserted, but also can self-seal the gap of the insertion hole through the micro-deformation of the elastic material, preventing the formation of a leakage channel in this part. Water-swellable materials will actively expand when in contact with a small amount of seepage water, further filling the tiny gap at the top of the joint and strengthening the sealing effect. Ordinary elastic materials can adapt to the slight deformation at the top of the joint and maintain a close fit for a long time, and are not prone to sealing failure due to structural deformation.

[0071] Among them, the seepage drainage pipe 8 is a pipe with water permeability and flow guiding function, such as PVC pipe, PE corrugated pipe or fiber reinforced permeable pipe with uniform water permeability holes, etc. It is embedded along the length of the expansion strip 7 and can extend to the building drainage system or inspection port at both ends. Its core function is to collect the small amount of water that may leak from the top of the joint and quickly guide it to the designated location through the internal channel, so as to avoid the accumulation of seepage water in the joint, which will lead to steel corrosion and failure of sealing components. At the same time, the seepage drainage pipe 8 can also serve as a monitoring channel for later operation and maintenance. By observing the drainage situation or injecting the detection medium, the seepage prevention status of the top of the joint can be quickly determined. Leakage can be located and repaired without damaging the structure, solving the pain points of traditional water-stopping structures where leakage is difficult to detect and repair is costly.

[0072] The first slot 15 is an integrated groove structure pre-set on the top of the first composite plate 1 and the second composite plate 11. The size of the slot is precisely matched with the cross-sectional size of the expansion strip 7, providing a stable installation and positioning foundation for the expansion strip 7, preventing it from shifting during construction disturbance, squeezing of the connecting concave plate 2, or use, and ensuring the installation stability of the anti-seepage operation and maintenance components. The embedded design of the slot allows the expansion strip 7 to form a tight structural connection with the composite plate, avoiding the problem of weak sealing caused by the expansion strip 7 relying solely on surface adhesion, and further improving the sealing reliability of the top of the joint.

[0073] The sixth insertion hole 71 is a precise alignment through hole on the expansion strip 7. Its position is consistent with the first insertion hole 27 of the first bolt 13 and the connecting wing plate 23, ensuring that the expansion strip 7 can be accurately fitted onto the first bolt 13, achieving dual limiting of bolt fixing and slot positioning. This design allows the expansion strip 7 to be firmly clamped between the connecting wing plate 23 and the top of the composite plate. The displacement generated by the top edge of the connecting concave plate 2 under the action of pre-tightening force will continuously compress the expansion strip 7, making the expansion strip 7 tightly fit with each mating surface, strengthening the sealing effect at the top of the joint, and at the same time preventing the expansion strip 7 from deforming and failing due to excessive compression.

[0074] In summary, the seepage prevention and maintenance component, through the combined design of the expansion strip 7 for active sealing and the seepage drainage pipe 8 for drainage and maintenance, not only solves the seepage prevention problem at the top of the joint, but also makes up for the lack of maintenance channels in traditional water-stop structures. Its linkage with the connecting concave plate 2 and the first bolt 13 allows the sealing effect to be optimized synchronously with the pre-tightening force, and the water expansion characteristic further enhances the anti-leakage capability. Meanwhile, the seepage drainage pipe 8 provides a convenient path for later maintenance, realizing the integration of seepage prevention and maintenance, greatly improving the long-term reliability of the joint structure and reducing later maintenance costs.

[0075] Reference Figure 1 , Figure 4 and Figure 7The reinforcing component 4 includes a second transverse rib 41, a pressure column 42 fixedly installed at the bottom of the second transverse rib 41, and a longitudinal steel bar 6 inserted into the pressure column 42. This component is arranged above the connecting concave plate 2 and is fixed by coupling the second transverse rib 41 with the first bolt 13. It provides rigid support and structural reinforcement for the sealing component and the connecting concave plate 2. At the same time, it is solidified with the grouting concrete to improve the overall structural rigidity, shear resistance and durability of the joint area and prevent the core component from failing due to deformation under stress.

[0076] The second transverse rib 41 is made of high-strength steel bars or structural steel and is transversely positioned across the top of the joint. It has second insertion holes 43 at both ends that are precisely coupled to the first bolt 13. The hole diameter matches the size of the first bolt 13 and can be locked to the first bolt 13 with nuts to form a stable transverse support frame. Its core function is to distribute the load pressure at the top of the joint and provide a solid installation foundation for the anti-pressure column 42. This ensures that the anti-pressure column 42 can continuously apply stable anti-pressure to the fixed corner plate 5, preventing the fixed corner plate 5 from warping or displacing under the action of pre-tightening force and grouting pressure, and ensuring the compression sealing effect of the sealing component.

[0077] The pressure column 42 is a rigid column structure made of high-strength metal or reinforced concrete. It is vertically fixed to the middle position of the bottom of the second transverse reinforcement 41, and its lower end is in close contact with the middle end of the upper surface of the fixed corner plate 5, forming a rigid constraint of "pull up and press down". Its contact position precisely corresponds to the core force area of ​​the fixed corner plate 5. It can apply a continuous and uniform vertical pressure to the fixed corner plate 5 through the fixing force of the second transverse reinforcement 41, which can counteract the warping tendency of the fixed corner plate 5 caused by the compression on both sides, so that the fixed corner plate 5 always maintains a tight fit with the first sealing corner plate 51, and strengthens the compression sealing effect of the sealing component. The pressure column 42 is provided with a third insertion hole 44 for the longitudinal reinforcement 6 to be inserted, providing a precise installation and positioning foundation for the longitudinal reinforcement 6.

[0078] Among them, the longitudinal reinforcing bar 6 is made of high-strength ribbed steel bar, which is inserted into the third insertion hole 44 of the anti-compression column 42, and the lower end extends to the joint grouting area, forming a rigid connection with the connecting concave plate 2, the reinforcing bar 12 and the surrounding grouting concrete; its core function is to solidify the reinforcing component 4 with the overall structure of the joint, improve the longitudinal shear resistance and structural integrity of the joint area, and prevent the joint from being relatively displaced due to load or temperature deformation. At the same time, through the mechanical interlocking force between the steel bar and the concrete, the position of the anti-compression column 42 is further fixed to ensure its anti-compression effect is stable in the long term; the surface texture of the ribbed steel bar can enhance the bonding force with the concrete, making the solidified structure more solid and less prone to peeling or loosening.

[0079] In summary, the reinforced component 4, through its three-dimensional reinforced design—comprising the second transverse reinforcement 41 for transverse support, the pressure column 42 for vertical pressure, and the longitudinal reinforcement 6 for longitudinal strengthening—constructs a rigid framework for the joint area. In the transverse dimension, it distributes the load and stabilizes the component's position; in the vertical dimension, it ensures the compression effect of the sealing component; and in the longitudinal dimension, it enhances the overall structural integrity and shear resistance. Its coupling and fixation with the first bolt 13 achieves a firm connection with the composite slab body, while its consolidation with the grouting concrete creates a seamless, integrated load-bearing system between the joint structure and the composite slab. This not only prevents the sealing component from failing due to structural deformation but also improves the joint's load-bearing capacity and durability, ensuring that waterproofing and seepage prevention effects and structural stability are maintained synergistically over the long term.

[0080] Reference Figures 1-11 Based on the above, a construction process for a composite slab joint waterproofing and seepage prevention structure is hereby disclosed, including the following steps:

[0081] Step 1: Prefabricate and inspect the first composite plate 1, the second composite plate 11, the connecting concave plate 2, and all functional components in the factory; clean the joint surfaces; check the dimensions of the components and the integrity of the accessories; and lubricate the threads of the reinforcing bar 12.

[0082] Step 2: Insert the expansion strip 7 into the first slot 15 at the top of the composite plate and fit it with the first bolt 13. Then, embed the seepage drainage pipe 8 into the expansion strip 7 and lead it out to the maintenance or drainage position.

[0083] Step 3: Hoist the connecting concave plate 2 into the joint. During hoisting, the inner concave side plate 22 can be squeezed towards the middle to reduce its width and allow it to be better inserted into the joint. Then, let the reinforcing bar 12 pass through the through groove 24 and align the first insertion hole 27 with the first bolt 13 to complete the centering positioning.

[0084] Step 4: Snap the first sealing angle plate 51 and the second sealing angle plate 52 onto the fixed angle plate 5, fit the whole onto the rib 12 and embed the second sealing angle plate 52 into the through groove 24, insert the second bolt 25 and fix it initially;

[0085] Step 5: Connect the anchor head 3 to the connecting thread 121 of the reinforcing bar 12, and tighten the two anchor heads 3 in reverse and synchronously to make the steel strand 32 twisted and tightened, apply centripetal pre-tightening force and simultaneously squeeze the sealing component.

[0086] Step 6: Fit the second transverse reinforcement 41 onto the first bolt 13, so that the pressure column 42 is pressed against the middle of the fixed angle plate 5. After tightening the nut, insert the longitudinal reinforcement 6 to complete the overall rigid reinforcement.

[0087] Step 7: Pour self-compacting micro-expansion concrete, and use the grouting pressure to drive the connecting concave plate 2 to further fit and seal. After the concrete has initially set, complete the curing process to form an integrally consolidated anti-seepage joint structure system.

[0088] In summary, the present invention has the following advantages:

[0089] The convex sidewall 14 of the composite plate and the connecting concave plate 2 form a curved surface that fits together, greatly increasing the contact area and reducing the initial leakage gap. The connecting concave plate 2 can adapt to deformation under force and always maintain a tight fit with the composite plate. The first transverse rib 26 ensures the top rigidity of the connecting concave plate 2, achieving the dual effect of structural stability and foundation sealing. This solves the problems of small contact area, large initial gap, weak sealing foundation, easy deformation of connecting parts, unstable positioning, and poor overall integrity of the joint caused by the straight sidewall design of the traditional composite plate joint.

[0090] The connecting concave plate 2 adopts an integrated structure of the convex bottom plate 21 and the concave side plate 22, which has sufficient rigidity and a certain elastic deformation capacity to adapt to the dynamic changes of grouting pressure and pre-tightening force. The first transverse rib 26 is integrally formed, which effectively limits the excessive deformation of the top of the concave side plate 22 and ensures the spacing accuracy. The through groove 24 is precisely adapted to the rib 12, which solves the connection problem between the connecting concave plate 2 and the rib 12 when it is installed later. It can be realized that after the connecting concave plate 2 is hoisted into place, the rib 12 can be smoothly inserted without the need to disassemble or adjust the rib 12 in advance. At the same time, it realizes the structural interlocking connection between the composite plate and the connecting concave plate 2, builds a rigid and continuous path for the transmission of pre-tightening force, and provides a precise positioning foundation for the sealing component. It enables the sealing component to be accurately embedded in the through groove 24 to achieve full circumference sealing, taking into account the functions of structural support, force transmission and sealing adaptation. It solves the problems of the traditional splice connection component having a single structure and insufficient rigidity, which is prone to irreversible deformation, and solves the problems of the rib 12 being inconvenient to insert and easily damaged by repeated bending.

[0091] The anchoring pre-tightening component provides uniform centripetal pre-tightening force through the twisting and tightening of steel strands 32, which can offset the shrinkage stress of concrete and inhibit joint cracking. The pre-tightening force is controllable and the force transmission is direct, realizing active sealing of the joint. The anchor claws 312 enhance the interlocking force with the concrete, and the sealing rings 33 seal local gaps, combining structural reinforcement and seepage prevention sealing functions. It solves the problems of traditional joints without active pre-tightening, the difference in shrinkage between new and old concrete that easily produces micro-cracks, the reliance on passive filling for sealing that is prone to loosening and failure in the long term, and the uneven pre-tightening force and unreliable force transmission.

[0092] On the other hand, the anchoring pre-tightening force continuously squeezes the expansion strip 7 at the top of the connecting concave plate 2, further strengthening the top seal; the pre-tightening effect reduces the deformation of the joint, reduces the stress loss of the seepage prevention component, realizes the complementarity of active pre-tightening and passive sealing, and improves the reliability of top seepage prevention; it solves the problems that the top seal is not enough to be tightened by its own elasticity, is prone to gaps, the joint deformation leads to the top seal being disconnected, the seal and the structure are not synchronized in stress, and the seepage prevention reliability is low;

[0093] On the other hand, during anchoring pre-tightening, the anchor head 3 directly squeezes the fixed corner plate 5, causing the sealing corner plate to undergo elastic deformation, achieving the linkage effect of pre-tightening and sealing; no separate pressure sealing is required, simplifying the construction process, and at the same time, the sealing pressure increases synchronously with the pre-tightening force, making the sealing effect more reliable; solving the problems of needing to apply pressure separately for sealing, complicated procedures, insufficient or uneven sealing pressure leading to leakage, and easy connection loopholes in the step-by-step construction of pre-tightening and sealing.

[0094] In addition, the pre-tightening force is directly transferred to the main body of the composite slab through the reinforcing rib 12, which makes the composite slabs on both sides move closer to the joint and reduce the gap between the joints; it can suppress the generation of cracks from the structure, improve the integrity of the joint, reduce the difficulty of sealing, and improve the waterproof effect; it can solve the problems of uneven joint width, excessive gap leading to sealing difficulties, weak connection between composite slabs, poor integrity, and difficulty in suppressing shrinkage cracks from the structure.

[0095] Furthermore, the pre-tightening force drives the concave side plate 22 to adhere to the convex surface 14 of the composite plate, so that the connecting concave plate 2 forms a dynamic sealing shape; the elastic reset characteristics of the connecting concave plate 2, combined with the continuous pre-tightening force, maintain the adhered state for a long time, adapt to grouting and shrinkage deformation, and the sealing effect is adaptively enhanced; it solves the problems of the connecting concave plate 2 and the composite plate not being tightly adhered, the existence of dynamic gaps, the sealing surface being easy to separate during grouting and shrinkage, and the rigid components being unable to adapt to deformation, resulting in sealing failure.

[0096] The sealing assembly adopts a composite structure of rigid fixed corner plate 5 and elastic sealing corner plate, which can seal the gaps around the through groove 24 and the reinforcing bar 12 in all directions; the dual compression sealing mode makes the force more uniform, and the elastic material adapts to the slight deformation of the structure, eliminating leakage at the bottom of the joint from the root. It is also easy to install and suitable for prefabricated construction. It solves the problem that the through position of the reinforcing bar 12 is prone to leakage weak point, and solves the problems of uneven force, easy warping and voiding of traditional sealing parts, and difficulty in adapting to slight deformation of the structure at the bottom.

[0097] The anti-seepage maintenance component achieves a flexible seal at the top of the joint through the expansion strip 7, which expands upon contact with water to further seal the gap; the built-in seepage drainage pipe 8 can collect and drain a small amount of seepage, facilitating later monitoring and maintenance, and realizing the integration of sealing, diversion, and maintenance; it solves the problems of easy aging of the seal at the top of the joint, difficulty in detecting seepage, lack of diversion channels in traditional water-stop structures, easy corrosion of steel bars by water accumulation, and the need for dismantling and repair after leakage, which is costly and difficult.

[0098] The reinforcement component 4 is connected to the longitudinal steel bars 6 through horizontal support, vertical compression, and to form a rigid skeleton for the joint, thereby improving the overall shear resistance and load-bearing capacity. The compression column 42 continuously presses the sealing component to prevent it from warping and deformation, ensuring the long-term stability of the sealing effect and synergistically improving the structural strength and seepage prevention performance. This solves the problems of insufficient stiffness and weak shear resistance in the joint area, the easy floating, warping, and displacement of the sealing component under grouting pressure and load, and the insufficient structural integrity leading to sealing failure.

[0099] The reinforcing component 4 uses the pressure column 42 to evenly press the center of the fixed corner plate 5, preventing the sealing component from warping or shifting during grouting and stress. This ensures that the sealing part is continuously compressed and compacted, avoiding local voids that could lead to leakage. At the same time, it improves the structural rigidity of the sealing area and extends its service life. This solves the problems of the sealing component being suspended in the middle, unevenly stressed and prone to voiding, the sealing element floating and shifting during grouting, and the loosening of the sealing part and the formation of leakage channels after long-term use.

[0100] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A laminated slab joint water stop anti-seepage structure, comprising a first laminated slab (1) and a second laminated slab (11), both of which are internally provided with a beard rib (12) and both of which are provided with a first bolt (13) at the top, characterized in that, The sidewalls of the first composite plate (1) and the second composite plate (11) facing the joint are both set as convex surfaces (14). The joint is provided with a connecting concave plate (2), which includes an integrally formed upper convex bottom plate (21) and an inner concave side plate (22). The top of the two inner concave side plates (22) is provided with an integrally formed first transverse rib (26), and the bottom of the connecting concave plate (2) is provided with a through groove (24) for the rib (12) to pass through. The connecting concave plate (2) is fixedly connected to the first bolt (13). It also includes anchoring pre-tightening components, seepage prevention operation and maintenance components, and sealing components; The two sets of seepage prevention operation and maintenance components are respectively set at the connection between the top of the first composite plate (1) and the second composite plate (11) and the connecting concave plate (2); The sealing component is sleeved on the reinforcing bar (12) and seals the through groove (24). When the anchoring pre-tightening component is fixed to the reinforcing bar (12), it forms a fixed seal for the sealing component.

2. The composite slab joint waterproofing and seepage prevention structure according to claim 1, characterized in that, The end of the fascia (12) extending to the inner side of the connecting concave plate (2) is provided with a connecting thread (121). When the anchoring pre-tightening assembly is tightened, the connecting thread (121) applies a centripetal pre-tightening force toward the middle of the joint to the first composite plate (1) and the second composite plate (11). At the same time, under the drive of the anchoring pre-tightening assembly, the middle area of ​​the concave side plate (22) moves radially closer to the convex surface (14) of the corresponding side composite plate, so that the middle part of the concave side plate (22) is pressed against the convex surface (14) of the composite plate. The top of the connecting concave plate (2) is kept in position under the limiting action of the first transverse rib (26), and the top edge of the connecting concave plate (2) is displaced towards the top of the corresponding side composite plate, which squeezes the seepage prevention operation and maintenance component. As the concave side plate (22) contracts, the upper convex bottom plate (21) arches upward, and the connection between the upper convex bottom plate (21) and the concave side plate (22) of the concave plate (2) is synchronously attached to the convex surface (14) of the adjacent composite plate as the displacement occurs.

3. The composite slab joint waterproofing and seepage prevention structure according to claim 2, characterized in that, When grouting is performed, under the action of grouting pressure, the middle part of the upper convex bottom plate (21) is displaced downward, and the deformation caused by the downward displacement synchronously drives the bottom edge of the concave side plate (22) to move towards the convex surface (14) of the composite plate. The central area of ​​the concave side plate (22) is pressed against the convex surface (14) of the composite plate synchronously with the displacement of the bottom edge. The top of the concave side plate (22) remains unchanged under the limitation of the first transverse rib (26). The connection between the upper convex bottom plate (21) and the concave side plate (22) is tightened synchronously with the displacement. The two ends of the upper convex bottom plate (21) are pulled towards the outside of the joint following the displacement of the bottom edge of the concave side plate (22). Furthermore, the concrete exerts pressure on the anchoring pre-tightening assembly, and the anchoring pre-tightening assembly generates a secondary pre-tightening force on the first composite plate (1) and the second composite plate (11) under the action of the concrete pressure.

4. The composite slab joint waterproofing and seepage prevention structure according to claim 1, characterized in that, A connecting wing plate (23) is fixedly installed on the top of the concave side plate (22). The connecting wing plate (23) is provided with a first insertion hole (27) that mates with the first bolt (13). The connecting wing plate (23) is fixedly connected to the first bolt (13) by means of a nut.

5. The composite slab joint waterproofing and seepage prevention structure according to claim 4, characterized in that, The seepage prevention operation and maintenance component includes an expansion strip (7) and a seepage drainage pipe (8) disposed in the expansion strip (7). The top of the side of the first composite plate (1) and the second composite plate (11) with a convex surface (14) is provided with a first slot (15). The expansion strip (7) is engaged in the first slot (15). The expansion strip (7) is provided with a sixth insertion hole (71) coupled to the first bolt (13).

6. The composite slab joint waterproofing and seepage prevention structure according to claim 1, characterized in that, The sealing assembly includes a fixed corner plate (5), on which a first sealing corner plate (51) is snapped, and the first sealing corner plate (51) is provided with an integrally formed second sealing corner plate (52), which matches the through groove (24); The fixed angle plate (5), the first sealing angle plate (51), and the second sealing angle plate (52) are all provided with a fourth insertion hole (53) and a fifth insertion hole (54). The shank rib (12) passes through the fifth insertion hole (54) and is fixed to the concave side plate (22) by the anchoring pre-tightening assembly. The second bolt (25) passes through the fourth insertion hole (53) and is fixed by the nut. When the anchoring pre-tightening assembly fixes the fixed angle plate (5), the fixed angle plate (5) and the concave side plate (22) cooperate to squeeze the first sealing angle plate (51). When the nut and the second bolt (25) fix the fixed angle plate (5), the fixed angle plate (5) cooperates with the upper convex bottom plate (21) to squeeze the first sealing angle plate (51).

7. The composite slab joint waterproofing and seepage prevention structure according to claim 6, characterized in that, The anchoring pre-tightening assembly includes two symmetrically arranged anchor heads (3) and at least three steel strands (32). The two ends of the steel strands (32) are fixedly connected to the anchor heads (3). The two sets of anchor heads (3) are threadedly connected to the connecting threads (121) of two sets of reinforcing bars (12) on the first composite plate (1) and the second composite plate (11). When the two anchor heads (3) are tightened, the two anchor heads (3) rotate in opposite directions. The at least three steel strands (32) twist and turn with the anchor heads (3) and form a tight state. The steel strands (32) apply a tensioning force to the anchor heads (3) by twisting and tightening. The anchor heads (3) apply a centripetal pre-tightening force to the reinforcing bars (12) towards the middle of the joint.

8. The composite slab joint waterproofing and seepage prevention structure according to claim 7, characterized in that, The anchor head (3) includes a threaded sleeve (31), the end of which is provided with an integrally formed hexagonal screw head (311), and the outer wall of the threaded sleeve (31) is provided with an integrally formed anchor claw (312). The end of the anchor claw (312) away from the threaded sleeve (31) is inclined towards the concave side plate (22). The end of the threaded sleeve (31) that is in contact with the fixed angle plate (5) is provided with a second groove (313), and a sealing ring (33) is engaged in the second groove (313). During the tightening process of the anchor head (3), the threaded sleeve (31) and the fixed angle plate (5) cooperate to squeeze the sealing ring (33).

9. A composite slab joint waterproofing and seepage prevention structure according to claim 6, characterized in that, It also includes a reinforcing component (4), which includes a second transverse rib (41). Both ends of the second transverse rib (41) are provided with second insertion holes (43). The second insertion holes (43) are coupled with the first bolt (13). A pressure column (42) is fixedly installed at the bottom of the second transverse rib (41). The pressure column (42) abuts against the middle end of the upper surface of the horizontal plate of the fixed corner plate (5).

10. A composite slab joint waterproofing and seepage prevention structure according to claim 9, characterized in that, The pressure column (42) is provided with a third insertion hole (44), and a longitudinal steel bar (6) is inserted into the third insertion hole (44). The longitudinal steel bar (6) and the pressure column (42) are solidified together by grouting.

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