Concrete joint seepage-proof structure

Abstract

The utility model belongs to the technical field of building engineering, concretely relates to the anti -infiltration technology of concrete joint surface. A kind of concrete joint surface anti -infiltration structure, it is arranged at the end portion of side wall form, and side wall form includes two opposite setting support plate for forming pouring space, and multiple opposite-pull reinforcement for connecting two support plates;Anti -infiltration structure includes the fixed plate installed on the end portion of support plate, the side plate vertically connected with fixed plate, and the inner extension plate set in the end portion connection of side plate away from fixed plate, parallel with support plate, and extend to pouring space;Two respectively installed inner extension plate between two support plates and opposite setting are connected with vertical plate.The utility model can overcome the quality instability, inefficiency and other defects caused by artificial grooving and planting in the prior art.

Description

Technical Field

[0001] This utility model belongs to the field of building engineering technology, specifically relating to anti-seepage technology for concrete bonding surfaces. Background Technology

[0002] In building construction, especially in underground engineering, concrete structures are large in volume and cannot be poured in one go. Multiple pours of concrete are required. Water leakage often occurs at the interface between the old and new concrete, especially at the exterior walls of underground projects. When the underground project is deep and located in sandy soil, water leakage is very common. How to prevent water leakage is a difficult problem in the engineering field.

[0003] A document with authorization announcement number CN117661641A discloses a method for preventing water seepage in concrete, comprising the following steps: pouring a first concrete layer; removing a portion of the concrete on the interface between the first and second concrete layers to form a groove; inserting reinforcing bars into the groove; and pouring a second concrete layer, such that a portion of the reinforcing bars is placed in the first concrete layer and the remainder in the second concrete layer. This method can increase the interface area between the first and second concrete layers, extend the water seepage path, effectively control leakage at the joint, and improve construction quality.

[0004] However, this method also has the following drawbacks: the accuracy and efficiency of on-site trenching and rebar installation are greatly affected by manual labor, and the quality is difficult to control. First, the depth, width, and uniformity of manual trenching are difficult to guarantee, resulting in inconsistent bonding effects at the joint surfaces. Second, the adhesion between the reinforcing bars and the concrete after installation depends on the skill level of the construction workers, and there is a risk of incomplete bonding or inaccurate positioning. Third, the entire process is time-consuming, which seriously affects the construction progress, especially in large-scale projects where this inefficiency is amplified. Finally, if the dust and debris generated during trenching are not thoroughly cleaned, they can form a weak layer at the joint surface, increasing the risk of leakage.

[0005] Therefore, there is an urgent need for a concrete joint surface anti-leakage structure that can achieve standardized, factory-produced, and simultaneous installation with formwork engineering, can ensure the precise geometry of the joint surface and the position of the reinforcing bars, and can effectively improve construction efficiency. Utility Model Content

[0006] To address the aforementioned problems, the purpose of this utility model is to provide a concrete bonding surface anti-seepage structure that overcomes the defects of unstable quality and low efficiency caused by relying on manual trenching and rebar installation in the prior art.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows: A concrete bonding surface anti-seepage structure is provided at the end of a side wall formwork, the side wall formwork including two opposing support plates for forming a pouring space, and a plurality of tie bars for connecting the two support plates; The anti-leakage structure includes a fixing plate installed on the end of the support plate, a side plate perpendicularly connected to the fixing plate, and an inner extension plate connected to the end of the side plate away from the fixing plate, parallel to the support plate, and extending into the pouring space. A vertical plate connects the two inner extension plates, which are respectively mounted on the two support plates and are arranged opposite each other.

[0008] As a further preferred embodiment of the present invention, the side plate and / or the inner extension plate are provided with a plurality of protrusions on the surface near the casting space.

[0009] As a further preferred embodiment of the present invention, the anti-leakage structure further includes a plurality of mounting holes provided on the vertical plate, a reinforcing screw installed on the mounting holes, and a fixing nut screwed onto the reinforcing screw and abutting against the vertical plate.

[0010] As a further preferred embodiment of this utility model, a clamping plate for connecting two adjacent reinforcing screws is provided on the side of the vertical plate near the casting space, and the clamping plate is provided with a channel for the reinforcing screws to pass through.

[0011] As a further preferred embodiment of the present invention, the anti-leakage structure further includes a waterproof layer disposed between the vertical plate and the clamping plate, wherein the two ends of the waterproof layer extend to the inner extension plate.

[0012] As a further preferred embodiment of the present invention, a buckle is formed on the inner extension plate for fixing the end of the waterproof layer.

[0013] As a further preferred embodiment of the present invention, a groove is formed on the inner extension plate for sliding connection with the end of the vertical plate.

[0014] As a further preferred embodiment of this utility model, a plurality of connecting ribs are provided between two adjacent reinforcing screws.

[0015] As a further preferred embodiment of this utility model, the fixing plate is provided with a plurality of fixing holes that match the tie bars.

[0016] The beneficial effects of this utility model are: This invention ensures the accuracy of the dimensions, shape, and position of the molded groove and the pre-embedded reinforcing screw through standardized components produced in a factory, completely eliminating the quality variation caused by manual operation and making the seepage prevention performance of the joint surface stable and reliable.

[0017] This invention integrates the traditional tedious and time-consuming processes of grooving, cleaning, and rebar installation into a one-time operation that is completed simultaneously with the formwork installation, significantly shortening the construction cycle and reducing reliance on skilled workers.

[0018] This invention creates a triple seepage prevention mechanism consisting of "mechanical interlocking (groove and protrusion) + rigid tie (reinforcing screw) + flexible sealing (waterproof layer)," which significantly improves the safety margin for seepage prevention and is especially suitable for underground projects with extremely high waterproof requirements. Attached Figure Description

[0019] Appendix Figure 1 This is a schematic diagram of the structure of this utility model from a top view.

[0020] Appendix Figure 2 Appendix to this utility model Figure 1 A partial structural diagram.

[0021] Appendix Figure 3 This is a construction diagram of the present invention after the first concrete layer has been poured.

[0022] Appendix Figure 4 This is a construction diagram of the present invention after the installation of the second reinforcement system and before the pouring of the second concrete layer.

[0023] Attached diagram descriptions: a) pouring space, b) internal cavity, and 100mm side wall formwork; Support plate 110, tie rod 120; Fixed plate 210, side plate 220, inner extension plate 230, vertical plate 240, protrusion 250, clamping plate 260, waterproof layer 270; Buckle 231, Groove 232; Mounting hole 241, reinforcing screw 242, fixing nut 243, connecting rib 244. Detailed Implementation

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] As attached Figure 1 ~Appendix Figure 2 As shown, this embodiment provides a concrete bonding surface anti-seepage structure, which is set at the end of the side wall formwork 100. Its core design concept is to be a "pre-installed, integrated" module that works in conjunction with the conventional side wall formwork 100.

[0027] The side wall formwork 100 is a common structure in the prior art, typically comprising two opposing support plates 110 (usually steel or wooden formwork), which are connected and fixed by multiple tie bars 120 (usually with sleeves and nuts), thereby forming a pouring space a for pouring concrete between the two support plates 110. The anti-seepage structure of this utility model is installed at the end of this side wall formwork 100 to form a high-quality anti-seepage bonding surface at horizontal construction joints (such as the junction of the basement floor slab and the wall).

[0028] The main components of the anti-seepage structure are usually welded or bolted together from steel plates, structural steel or other sturdy materials. The specific structure includes: a fixed plate 210 installed on the end of the support plate 110, a side plate 220 perpendicularly connected to the fixed plate 210, and an inner extension plate 230 connected to the end of the side plate 220 away from the fixed plate 210, parallel to the support plate 110 and extending into the pouring space a; and a vertical plate 240 is connected between the two inner extension plates 230 respectively installed on the two support plates 110 and arranged opposite each other.

[0029] The fixing plate 210 can be fixedly installed to the end of the support plate 110 by means of bolts or welding. Preferably, the fixing plate 210 is provided with multiple fixing channels (not shown separately in the figure) that match the tie bars 120, so that when the tie bars 120 are installed, they can pass through the support plate 110 and the fixing plate 210 at the same time, so as to achieve fast and accurate positioning and fixing, and the integration is very high.

[0030] The side plate 220 connects the fixing plate 210 and the inner extension plate 230, while the inner extension plate 230 is a key component that directly participates in forming the geometry of the mating surface. The two opposing inner extension plates 230 together define an internal cavity b. The vertical plate 240 seals the internal cavity, enhances the overall structural rigidity, and also serves as the foundation platform for subsequent reinforcement system installation.

[0031] In some preferred embodiments, to greatly enhance the interlocking effect between new and old concrete, multiple protrusions 250 are provided on the surfaces of the side plate 220 and / or the inner extension plate 230 near the pouring space a. These protrusions 250 can be hemispherical, pyramidal, or strip-shaped ribs, etc. After the concrete is poured, these protrusions 250 will form corresponding pits in the solidified concrete. When a second layer of concrete is poured subsequently, the new concrete will fill these pits, forming a highly effective three-dimensional mechanical interlocking structure, making the water penetration path extremely tortuous and lengthy, thus greatly enhancing the seepage prevention effect.

[0032] Furthermore, in order to achieve rigid ties, the reinforcing structure is optimized in some preferred embodiments, as follows: The leak-proof structure also includes multiple mounting holes 241 provided on the vertical plate 240, reinforcing screws 242 installed in the mounting holes 241, and fixing nuts 243 screwed onto the reinforcing screws 242 and abutting against the vertical plate 240.

[0033] Specifically, reinforcing bolts 242 are securely anchored to the vertical plate 240 by screwing in fixing nuts 243, which abut against the vertical plate 240, on both the inner and outer sides (the side closer to or further from the pouring space a). At this point, one end of the reinforcing bolt 242 extends into the pouring space a, while the other end is located outside the pouring space a. During the pouring of the first concrete layer, the area enclosed by components such as the inner extension plate 230 and the side plate 220 is filled with concrete, but the protruding portions of the reinforcing bolts 242 are isolated outside the concrete. After the formwork is removed, the ends of these reinforcing bolts 242 are precisely exposed on the mating surface. When the second concrete layer is poured, these bolts are embedded in the new concrete, forming a strong shear and tensile connecting member.

[0034] Furthermore, to enhance the overall stability of the reinforcement system, a clamping plate 260 is provided on the side of the vertical plate 240 near the pouring space a to connect two adjacent reinforcing screws 242. The clamping plate 260 has channels for the reinforcing screws 242 to pass through. The clamping plate 260 is typically a long strip of steel plate, which can connect multiple adjacent reinforcing screws 242 in the same row to form a single unit. This effectively prevents individual screws from shaking or tilting due to stress during concrete pouring, ensuring the accuracy of the pre-embedded position.

[0035] In some preferred embodiments, the leak-proof structure further includes a waterproof layer 270 disposed between the vertical plate 240 and the clamping plate 260. The waterproof layer 270 is preferably made of a material with certain ductility and anti-aging properties, such as rubber sheet, PVC waterproof membrane, or water-swellable rubber sheet. The waterproof layer 270 should have a sufficiently large area, extending to the inner extension plates 230 on both sides at its two ends. Its function is to provide a continuous, flexible sealing barrier to prevent water from passing through when the rigid joint surface may develop micro-cracks due to shrinkage. This significantly improves reliability and adaptability compared to traditional purely rigid waterproofing.

[0036] Furthermore, to ensure the installation quality of the waterproof layer 270 and prevent it from being disturbed during subsequent concrete pouring, a clip 231 for fixing the end of the waterproof layer 270 is formed on the inner extension plate 230. The clip 231 can be a hook-shaped structure integrally stamped with the inner extension plate 230. During installation, the end of the waterproof layer 270 is rolled up and inserted into the clip 231, which achieves quick and firm fixing, is simple to operate, and has reliable effect.

[0037] In some preferred embodiments, to accommodate minor installation errors in walls or formwork of varying thicknesses, the inner extension plate 230 has grooves 232 formed on it for sliding connection with the end of the vertical plate 240. This means that the vertical plate 240 can be inserted into the grooves 232 of the inner extension plate 230 like a drawer, and its insertion length can be adjusted as needed to fine-tune the width of the internal cavity. After adjustment, it can be finally fixed with bolts or spot welding. This design greatly improves the versatility and on-site adaptability of the waterproof structure.

[0038] To further enhance the overall integrity of the reinforcement system, multiple connecting ribs 244 are provided between adjacent reinforcing bolts 242. These connecting ribs 244 connect the longitudinal and transverse reinforcing bolts 242 into a stable spatial grid, making the stress on the joint surface more uniform and further improving the overall performance of the structure. It is worth noting that the connecting ribs 244 should be tied after the first concrete layer is poured and the formwork is removed to avoid affecting the removal of the vertical plate 240.

[0039] This utility model also provides a construction method, as shown in the attached figure. Figure 1 Appendix Figure 3 and attached Figure 4 As shown, the main steps include: S1: Construction preparation and component prefabrication.

[0040] Based on the engineering design drawings, determine the location of construction joints and the wall thickness. Prefabricate the required dimensions of the waterproofing structure in the factory or fabrication plant. Prepare all necessary materials and components according to the selected design, including the type of protrusion 250, the type of waterproof layer 270, and the diameter and spacing of the reinforcing bolts 242, and conduct a quality inspection.

[0041] S2: Install side wall formwork and waterproofing structure.

[0042] First, erect one side of the support plate 110. Then, attach the fixing plate 210 of the waterproof structure tightly to the end of the support plate 110, so that the tie bars 120 pass through the corresponding holes on the support plate 110 and the fixing plate 210. Next, erect the other side of the support plate 110 and the waterproof structure. Initially tighten the nuts on the tie bars 120 to secure the entire formwork system (including the side wall formwork 100 and the waterproof structure) together. During this process, carefully check whether the vertical plate 240 is centered. If necessary, use its sliding connection (groove 232) with the inner extension plate 230 for fine-tuning to ensure that the distance between the inner extension plates 230 and the support plate 110 on both sides is consistent, thus ensuring a uniform thickness of the protective layer after molding. After adjustment, finally tighten all the nuts on the tie bars 120 and any bolts used to fix the vertical plate 240.

[0043] S4: Laying and fixing the waterproof layer 270.

[0044] Unfold the prefabricated waterproof layer 270 and insert its two ends into the clips 231 on the inner extension plates 230 on both sides to fix and press it tightly, ensuring that the waterproof layer 270 is laid flat, without wrinkles or damage, and completely covers the designed seepage prevention area.

[0045] S5: Install Enhanced System 1.

[0046] Align the holes on the clamping plate 260 with the reinforcing screw 242 and slip it on. Then screw the fixing nut 243 into the reinforcing screw 242 on the outside of the vertical plate 240 and tighten it, so that the vertical plate 240, the waterproof layer 270 and the clamping plate 260 are tightly pressed together.

[0047] S6: Pour the first layer of concrete.

[0048] Concrete (i.e., the first concrete layer) is poured into the pouring space a enclosed by the support plate 110 and the anti-seepage structure. During pouring, relevant specifications must be followed, with layered pouring and uniform vibration. Special attention should be paid to ensuring compaction near the inner extension plate 230 and side plate 220 of the anti-seepage structure to ensure the pits formed by the protrusions 250 are clear and intact, while avoiding over-vibration that could cause formwork displacement. After the first concrete layer reaches the specified strength, the nuts of the tie bars 120 are loosened sequentially, and the support plates 110 on both sides are removed. At this time, the fixing plate 210, side plate 220, inner extension plate 230, and vertical plate 240 of the anti-seepage structure also separate from the concrete. After removal, a regular mating surface with pits (formed by the protrusions 250) formed by this structure, as well as the neatly arranged ends of the reinforcing bolts 242 extending beyond the mating surface, will be clearly visible at the end of the first concrete layer. The first concrete layer is then fully cured.

[0049] S7: Install Enhanced System II.

[0050] According to the design requirements, connecting ribs 244 are installed between adjacent reinforcing screws 242 and tied or welded firmly to form a complete reinforcing skeleton.

[0051] S8: Pour the second layer of concrete.

[0052] After completing all the above preparations, the formwork for the second concrete layer can be erected (usually only the side formwork needs to be erected), and then the concrete for the second concrete layer can be poured. The concrete will completely enclose the reinforcing bolts 242, the clamping plates 260, the connecting bars 244, and the waterproof layer 270, and fill all the spaces formed by the pits at the interface of the first concrete layer 300. Care should be taken to avoid direct impact on the reinforcing system and the waterproof layer during vibration. Once the second concrete layer has reached its strength, the formwork can be removed, and curing can begin.

[0053] Thus, the construction of a permanent, high-strength, highly impermeable concrete bonding surface integrating efficient mechanical interlocking, rigid screw ties, and flexible waterproof layer sealing is completed.

[0054] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A concrete bonding surface anti-seepage structure, disposed at the end of a side wall formwork (100), the side wall formwork (100) comprising two opposing support plates (110) for forming a pouring space (a), and a plurality of tie bars (120) for connecting the two support plates (110); characterized in that: The anti-leakage structure includes a fixing plate (210) installed on the end of the support plate (110), a side plate (220) perpendicularly connected to the fixing plate (210), and an inner extension plate (230) connected to the end of the side plate (220) away from the fixing plate (210), parallel to the support plate (110), and extending toward the pouring space (a). A vertical plate (240) is connected between two inner extension plates (230) that are respectively mounted on the two support plates (110) and arranged opposite each other.

2. The anti-seepage structure for concrete bonding surfaces according to claim 1, characterized in that: The side plate (220) and / or the inner extension plate (230) are provided with a plurality of protrusions (250) on the surface near the casting space (a).

3. The anti-seepage structure for concrete bonding surfaces according to claim 1, characterized in that: The leak-proof structure also includes a plurality of mounting holes (241) provided on the vertical plate (240), a reinforcing screw (242) installed in the mounting holes (241), and a fixing nut (243) screwed onto the reinforcing screw (242) and abutting against the vertical plate (240).

4. The anti-seepage structure for concrete bonding surfaces according to claim 3, characterized in that: A clamping plate (260) for connecting two adjacent reinforcing screws (242) is provided on the side of the vertical plate (240) near the casting space (a). The clamping plate (260) is provided with a channel for the reinforcing screws (242) to pass through.

5. A concrete bonding surface anti-leakage structure according to claim 4, characterized in that: The anti-leakage structure also includes a waterproof layer (270) disposed between the vertical plate (240) and the clamping plate (260), with the two ends of the waterproof layer (270) extending to the inner extension plate (230).

6. A concrete bonding surface anti-leakage structure according to claim 5, characterized in that: The inner extension plate (230) has a snap (231) for securing the end of the waterproof layer (270).

7. A concrete bonding surface anti-leakage structure according to claim 1, characterized in that: The inner extension plate (230) has a groove (232) for sliding connection with the end of the vertical plate (240).

8. A concrete bonding surface anti-leakage structure according to claim 3, characterized in that: Multiple connecting ribs (244) are provided between two adjacent reinforcing screws (242).

9. A concrete bonding surface anti-leakage structure according to claim 1, characterized in that: The fixing plate (210) is provided with a plurality of fixing holes that match the tie bars (120).

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