A water stop device for fabricated laminated slab
By using polygonal waterstop joints and wing ring structures in prefabricated composite slabs, the problems of easy displacement and low bonding of circular waterstop joints are solved, achieving efficient and reliable waterproofing and construction efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA CONSTR SEVENTH ENG DIVISION CORP LTD
- Filing Date
- 2025-06-27
- Publication Date
- 2026-06-23
AI Technical Summary
In existing prefabricated composite slabs, circular plastic waterstops are prone to displacement and deformation, making them only suitable for circular pipes. Furthermore, their bonding with the composite slab is weak, leading to leakage problems.
A polygonal waterstop joint is adopted, with a wing ring set on the outer perimeter. The lower surface of the wing ring is pre-embedded in the prefabricated part of the composite slab, and the top is cast in the cast-in-place part to form a mechanical interlocking structure, which enhances the connection strength and extends the leakage path through the box. The wing ring and the waterstop joint are spliced into an array to adapt to irregular pipes.
It improves the positioning accuracy of the waterstop joint, reduces installation errors and mold costs, enhances connection strength, extends the leakage path, improves waterproofing effect, adapts to the needs of irregular pipes, and improves construction efficiency and waterproofing quality.
Smart Images
Figure CN224395803U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of waterproofing in prefabricated buildings, specifically a water-stopping device for prefabricated composite slabs. Background Technology
[0002] In the construction industry, waterproofing is a crucial technical requirement. Waterstops on composite slabs are primarily used to prevent water leakage at pipe penetration points. When pipes pass through composite slabs, the joint between the pipe and the concrete slab can easily become a seepage channel. Waterstops, either pre-embedded or installed later, form a waterproof barrier around the pipe, preventing water from seeping along the pipe's outer wall into the lower level.
[0003] Because of their thinness, prefabricated composite slab structures generally cannot accommodate conventional circular plastic waterstops. If such a waterstop is required, it is prone to misalignment and deformation. Conventional circular plastic waterstops are generally only suitable for circular pipes and cannot be used for irregularly shaped pipes or passageways. Furthermore, circular waterstops have poor durability during later use and are prone to displacement and loosening under vibration, leading to leaks.
[0004] Therefore, how to effectively solve the problems of easy displacement and deformation of the circular plastic waterstops reserved in the composite plate, or the fact that the circular plastic waterstops are only suitable for circular pipes, or the low degree of bonding between the circular waterstops and the composite plate, which easily leads to water leakage, are technical problems that urgently need to be solved. Utility Model Content
[0005] To address the shortcomings in the aforementioned background technology, this utility model proposes a water-stopping device for prefabricated composite slabs, which solves the problems of easy displacement and deformation of the circular plastic water-stop joints reserved in the composite slabs, or that the circular plastic water-stop joints are only suitable for circular pipes, or that the circular water-stop joints have a low degree of bonding with the composite slabs, which easily leads to water leakage.
[0006] The technical solution of this application is as follows:
[0007] A water-stopping device for prefabricated composite slabs includes a polygonal water-stop section with a wing ring on its outer periphery. The lower surface of the wing ring to the bottom of the water-stop section is pre-embedded in the precast portion of the composite slab, and the lower surface of the wing ring to the top of the water-stop section is cast in the cast-in-place portion of the composite slab. In the construction of prefabricated composite slabs, the advantages of pre-embedded rectangular water-stop sections are significant. Their regular shape matches the height of the precast mold, enabling precise positioning and reducing installation errors and mold costs. The angular structure of the rectangular water-stop section forms a mechanical interlock with the concrete in the precast portion of the composite slab, enhancing the connection strength between the water-stop section and the composite slab and dispersing stress.
[0008] Furthermore, the distance from the wing ring to the top of the waterstop joint is equal to the thickness of the cast-in-place portion of the composite slab, allowing it to be poured to the top of the waterstop joint in one go, covering the entire waterstop joint and preventing leakage at the construction joint. In other words, the construction joint location must pass through the wing ring before it can pass through the bottom, increasing the leakage path.
[0009] Furthermore, a box may be provided on the upper surface of the wing ring. When backfilling the reserved opening later, the entire waterstop section can be backfilled without cutting the waterstop section. This can also extend the construction joint between the cast-in-place part and the precast part of the composite slab at the waterstop section. When water seeps in, it needs to take a longer path, thus extending the seepage path. The height of the box is greater than the height from the upper surface of the wing ring to the top of the waterstop section, which facilitates the removal of the box. When the opening is no longer needed, pouring concrete can cover the entire waterstop section, thus strengthening the anti-leakage function.
[0010] Furthermore, the inner surface of the box body is spaced apart from the outer surface of the waterstop joint, and the construction joint is cut off by the wing ring of the waterstop joint, thus extending the leakage path.
[0011] Furthermore, the waterstop joint is rectangular, triangular, or hexagonal. The regular shape of the waterstop joint can be directly embedded into the pre-reserved groove of the mold, and fits seamlessly with the inner wall of the mold, making the positioning more accurate and reducing the installation error and mold adaptation cost caused by the arc edge of the circular waterstop joint in the prior art.
[0012] Furthermore, the height from the lower surface of the wing ring to the bottom of the waterstop is the same as the thickness of the precast part of the composite slab, which allows control of the pouring elevation during the pouring of the precast part of the composite slab.
[0013] Furthermore, the height from the upper surface of the wing ring to the top of the box is greater than the thickness of the cast-in-place portion of the composite slab, allowing the subsequent cast-in-place layer to completely cover the waterstop joint, thus extending the leakage path.
[0014] Furthermore, a seal is provided at the connection between the lower surface of the wing ring and the waterstop joint to form a three-dimensional waterproof structure. The sealing material of the circular waterstop joint needs to be applied around the circumference, and weak points in the seal are prone to appear at the corners. The square waterstop joint has higher waterproof reliability at the joint of the composite plate.
[0015] Furthermore, a stiffening rib is provided between the lower surface of the wing ring and the side of the waterstop joint, which strengthens the connection between the waterstop joint and the prefabricated part of the composite plate, making it less prone to deformation and displacement.
[0016] Furthermore, the water-stop joints are spliced together with adjacent water-stop joints. When multiple pipes are pre-embedded, the square water-stop joints can be spliced together horizontally or vertically to form an array, saving space and creating a neat arrangement. In areas with dense multiple pipes, such as bathrooms and kitchens, the square water-stop joints are spliced together to form a rectangular array, perfectly matching the square grooves reserved in the composite slab.
[0017] The specific beneficial effects of this utility model include:
[0018] 1. This utility model can be precisely adapted to the prefabricated mold of composite slab. The prefabricated composite slab is produced using standardized molds. The regular shape of the waterstop can be directly embedded into the reserved groove of the mold, and fits seamlessly with the inner wall of the mold. The positioning is more accurate, reducing the installation error caused by the arc edge of the circular waterstop in the prior art and the mold adaptation cost. In addition, the opening of the waterstop is convenient for later concrete pouring. The lower lintel and cast-in-place frame column under the composite slab can be poured in one go through the opening of the waterstop, avoiding cumbersome secondary construction, reducing construction difficulty and improving construction efficiency.
[0019] 2. The waterstop joint in this utility model is polygonal, and its edges and corners form a mechanical interlocking structure with the concrete of the composite slab after pouring. When subjected to pipe pressure or floor load, the stress points at the four corners can effectively disperse the stress. Compared with the circular waterstop joint in the prior art, it reduces the risk of loosening caused by local stress concentration.
[0020] 3. The height of the part below the wing ring of the polygonal waterstop in this utility model is consistent with the prefabrication design height of the composite slab. Construction personnel can quickly embed it through the positioning marks on the mold, and the elevation of the composite slab can be controlled and detected according to the height of the waterstop.
[0021] 4. This utility model optimizes the anti-leakage path by adding a box body above the wing ring. After the composite plate is installed, the height of the box body does not exceed the thickness of the cast-in-place layer. The subsequent cast-in-place concrete completely covers the water-stop joint, thus extending the leakage path. Attached Figure Description
[0022] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 This is a schematic diagram of the rectangular waterstop joint in Example 1;
[0024] Figure 2 This is a schematic diagram of the usage state of Example 2;
[0025] Figure 3 This is a cross-sectional view of Example 2;
[0026] Figure 4 This is a schematic diagram showing the assembly relationship between the water-stop joint and the box body in Example 2;
[0027] Figure 5 This is a schematic diagram showing the thickness relationship between the waterstop joint and the prefabricated part of the composite slab in Example 2;
[0028] Figure 6 This is a schematic diagram of the stiffening rib plate of the water-stop joint in Example 2;
[0029] Figure 7 This is a schematic diagram showing the splicing state of multiple waterstop sections in Example 2;
[0030] Figure 8 This is a schematic diagram of the triangular water-stop joint in Example 3;
[0031] Figure 9 This is a schematic diagram of the hexagonal waterstop joint in Example 4.
[0032] Explanation of icon numbers:
[0033] 1. Water-stopping joint;
[0034] 2. Precast composite slab section;
[0035] 3. Cast-in-place portion of composite slab;
[0036] 4. Box body;
[0037] 11. Wing ring;
[0038] 12. Sealing components;
[0039] 13. Stiffening ribs. Detailed Implementation
[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0041] Example 1: A water-stopping device for prefabricated composite slabs, such as... Figure 1 As shown, the waterstop section 1 is polygonal, but in this embodiment, a rectangular waterstop section 1 is used. A wing ring 11 is provided on the outer periphery of the waterstop section 1. The lower surface of the wing ring 11 to the bottom of the waterstop section 1 is pre-embedded in the precast portion 2 of the composite slab, and the lower surface of the wing ring 11 to the top of the waterstop section 1 is cast in the cast-in-place portion 3 of the composite slab. In the construction of prefabricated composite slabs, the advantages of pre-embedded rectangular waterstop sections 1 are significant. Their regular shape matches the height of the precast mold of the composite slab, enabling precise positioning and reducing installation errors and mold costs. The angular structure of the rectangular waterstop section 1 forms a mechanical interlock with the concrete in the precast portion 2 of the composite slab, enhancing the connection strength between the waterstop section 1 and the composite slab and dispersing stress. Both the waterstop section 1 and the wing ring 11 are made of steel.
[0042] Based on the above implementation method, the distance from the wing ring 11 to the top of the waterstop 1 is equal to the thickness of the cast-in-place part 3 of the composite slab. It can be poured to the top of the waterstop 1 in one go, covering the entire waterstop 1, thus avoiding leakage at the construction joint. That is, the construction joint position must pass through the wing ring 11 before it can pass through the bottom, which increases the leakage path.
[0043] Example 2, as a preferred embodiment, differs from Example 1 in that, as follows: Figure 2 , Figure 3 As shown, the waterstop section 1 is polygonal, but in this embodiment, a rectangular waterstop section 1 is used. A wing ring 11 is provided on the outer periphery of the waterstop section 1. The lower surface of the wing ring 11 to the bottom of the waterstop section 1 is pre-embedded in the precast portion 2 of the composite slab, and the lower surface of the wing ring 11 to the top of the waterstop section 1 is cast in the cast-in-place portion 3 of the composite slab. In the construction of prefabricated composite slabs, the advantages of pre-embedded rectangular waterstop sections 1 are significant. Their regular shape matches the height of the precast mold of the composite slab, enabling precise positioning and reducing installation errors and mold costs. The angular structure of the rectangular waterstop section 1 forms a mechanical interlock with the concrete in the precast portion 2 of the composite slab, enhancing the connection strength between the waterstop section 1 and the composite slab and dispersing stress. Both the waterstop section 1 and the wing ring 11 are made of steel.
[0044] Based on the above embodiment, a box 4 is provided on the upper surface of the wing ring 11. Preferably, the box 4 is a rectangular wooden box, which is hoisted and installed on site. The wooden box is nailed to the waterstop section, and the length and width of the wooden box are within the range of the wing ring 11 of the waterstop section. The height of the wooden box is greater than the elevation of the cast-in-place part 3 of the composite slab.
[0045] Specifically, after installing the wooden box, the steel bars of the precast composite slab 3 are tied on the upper part of the precast composite slab 2, and then concrete is poured. During the pouring process, attention should be paid to the stability of the embedded wooden box and it should not be misaligned. After the pouring is completed, the slab surface is sprayed with water for curing in time. The wooden box is then removed and the reserved opening is cleaned. The removed wooden box can be reused.
[0046] Based on the above embodiments, the inner surface of the box 4 and the outer surface of the waterstop 1 are spaced apart, such as... Figure 4 As shown, there is a certain gap between the box body 4 and the waterstop joint 1. The construction joint is cut off by the wing ring 11 of the waterstop joint 1, which prolongs the leakage path.
[0047] Based on the above embodiment, the height from the lower surface of the wing ring 11 to the bottom of the waterstop joint 1 is the same as the thickness of the prefabricated portion 2 of the composite plate, such as... Figure 5 The 'h' marked in the figure can be used to control the pouring elevation when pouring the precast part 2 of the composite slab.
[0048] Based on the above implementation method, the height of the box body 4 is greater than the height from the upper surface of the wing ring 11 to the top of the waterstop section 1, which facilitates the removal of the wooden box. When the opening is no longer needed, concrete can be poured to cover the entire waterstop section 1, thereby enhancing the anti-leakage function.
[0049] Based on the above implementation method, the height from the upper surface of the wing ring 11 to the top of the box 4 is greater than the thickness of the cast-in-place portion 3 of the composite slab, which facilitates the later removal of the box 4. After the box is removed, the subsequent cast-in-place layer can completely cover the waterstop section 1, extending the leakage path. At the same time, it can also prevent concrete from falling into the interior of the waterstop section 1 when the cast-in-place portion 3 of the composite slab is being poured, thus affecting the pouring of the lower lintel or the frame column; and the lower lintel or the frame column can be poured simultaneously with the cast-in-place portion 3 of the composite slab without affecting each other, improving work efficiency.
[0050] Based on the above embodiments, a sealing element 12 is provided at the connection between the lower surface of the wing ring 11 and the waterstop joint 1. The sealing element includes an L-shaped waterstop strip or sealing rubber strip for targeted sealing, forming a three-dimensional waterproof structure. However, the sealing material of the circular waterstop joint needs to be applied around the circumference, and weak points in the sealing are prone to appear at the corners. The square waterstop joint has higher waterproof reliability at the joint of the composite plate.
[0051] Based on the above embodiment, a stiffening rib 13 is provided between the lower surface of the wing ring 11 and the side of the waterstop joint 1, such as... Figure 6 As shown, the connection strength between the waterstop joint 1 and the prefabricated part 2 of the composite slab is strengthened, making it less prone to deformation and displacement.
[0052] Based on the above implementation method, the water-stop section 1 is spliced with the adjacent water-stop section 1, as follows: Figure 7 As shown, when pre-embedding multiple pipes, square waterstops can be spliced together horizontally or vertically to form an array, saving space and creating a neat arrangement. In areas with dense pipes, such as bathrooms and kitchens, square waterstops can be spliced together to form a rectangular array, perfectly matching the square grooves reserved in the composite slab. Compared to round waterstops, this method saves more space and allows for a more regular arrangement during pre-embedding, facilitating later pipe installation and positioning.
[0053] Specifically, the rectangular waterstop joint 1 also meets the standardized construction requirements of prefabricated buildings. It enables rapid pre-embedding through mold positioning markings, facilitating quality acceptance. It also demonstrates excellent adaptability in irregularly shaped composite slab designs, comprehensively improving the construction efficiency and waterproofing quality of prefabricated buildings. Construction and installation are more flexible, retaining the original waterstop joint's seepage prevention function while adapting to various irregularly shaped holes, offering greater spatial adaptability and ensuring safety and quality.
[0054] Specifically, for irregularly shaped or grooved composite panels, square waterstop joints can be cut and spliced to adapt to complex contours, while round waterstop joints are difficult to fit in irregular structures. Square waterstop joints are more suitable for special engineering scenarios.
[0055] Example 3, as a preferred embodiment, differs from Example 1 in that it includes a polygonal water-stop section 1. In this embodiment, the water-stop section 1 is triangular, as shown below. Figure 8 As shown, a wing ring 11 is provided on the outer periphery of the waterstop joint 1. The lower surface of the wing ring 11 to the bottom of the waterstop joint 1 is embedded in the prefabricated part 2 of the composite slab, and the lower surface of the wing ring 11 to the top of the waterstop joint 1 is cast in the cast-in-place part 3 of the composite slab. The wing ring 11 extends around the outer wall of the triangular waterstop joint 1.
[0056] Example 4, as a preferred embodiment, differs from Examples 1 and 2 in that it includes a polygonal water-stop section 1. In this embodiment, the water-stop section 1 is hexagonal, such as... Figure 9 As shown, a wing ring 11 is provided on the outer periphery of the waterstop joint 1. The lower surface of the wing ring 11 to the bottom of the waterstop joint 1 is embedded in the prefabricated part 2 of the composite slab, and the lower surface of the wing ring 11 to the top of the waterstop joint 1 is cast in the cast-in-place part 3 of the composite slab. The wing ring 11 extends around the outer wall of the triangular waterstop joint 1.
[0057] Example 5, as a preferred embodiment, differs from Examples 1 and 2 in that it includes a polygonal waterstop section 1. The outer periphery of the waterstop section 1 is provided with a wing ring 11. The lower surface of the wing ring 11 to the bottom of the waterstop section 1 is pre-embedded in the precast part 2 of the composite slab, and the upper surface of the wing ring 11 to the top of the waterstop section 1 is cast in the cast-in-place part 3 of the composite slab. The waterstop section 1 can be arbitrarily deformed according to the needs of on-site construction.
[0058] Any aspects of this utility model that are not detailed herein are conventional technical means known to those skilled in the art.
[0059] The above content shows and describes the basic principles, main features, and beneficial effects of this utility model. The above description is merely a preferred embodiment of this utility model and is not intended to limit it. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A water-stopping device for prefabricated composite slabs, characterized in that: It includes a polygonal waterstop section (1), and a wing ring (11) is provided on the outer periphery of the waterstop section (1). The lower surface of the wing ring (11) to the bottom of the waterstop section (1) is embedded in the prefabricated part (2) of the composite slab, and the lower surface of the wing ring (11) to the top of the waterstop section (1) is cast in the cast-in-place part (3) of the composite slab.
2. The water-stopping device for prefabricated composite slabs according to claim 1, characterized in that: The distance from the wing ring (11) to the top of the waterstop (1) is equal to the thickness of the cast-in-place portion (3) of the composite slab.
3. The water-stopping device for prefabricated composite slabs according to claim 2, characterized in that: Alternatively, a box (4) may be provided on the upper surface of the wing ring (11), and the height of the box (4) is greater than the height from the upper surface of the wing ring (11) to the top of the waterstop (1).
4. The water-stopping device for prefabricated composite slabs according to claim 3, characterized in that: The inner surface of the box (4) is spaced apart from the outer surface of the waterstop (1).
5. The water-stopping device for prefabricated composite slabs according to any one of claims 1-4, characterized in that: The water-stop section (1) is rectangular, triangular, or hexagonal.
6. The water-stopping device for prefabricated composite slabs according to any one of claims 1-4, characterized in that: The height from the lower surface of the wing ring (11) to the bottom of the waterstop (1) is the same as the thickness of the prefabricated part (2) of the composite plate.
7. The water-stopping device for prefabricated composite slabs according to claim 6, characterized in that: The height from the upper surface of the wing ring (11) to the top of the box body (4) is greater than the thickness of the cast-in-place part (3) of the composite plate.
8. The water-stopping device for prefabricated composite slabs according to any one of claims 1-4 and 7, characterized in that: A sealing element (12) is provided at the connection between the lower surface of the wing ring (11) and the water stop joint (1).
9. The water-stopping device for prefabricated composite slabs according to any one of claims 1-4 and 7, characterized in that: A stiffening rib (13) is provided between the lower surface of the wing ring (11) and the side of the waterstop (1).
10. The water-stopping device for prefabricated composite slabs according to any one of claims 1-4 and 7, characterized in that: The water-stop section (1) is spliced with the adjacent water-stop section (1).