Modularized building waterproof area abutted seam connector structure

By installing waterproof coatings, filling sealant, and expanding waterstops at the joints of modular buildings, and by setting PE drainage channels in the slope-finding layer, the problems of easy hardening of adhesive strips and water seepage accumulation in the insulation layer in existing technologies are solved, achieving efficient waterproofing and insulation effects and improving the durability of buildings.

CN224244137UActive Publication Date: 2026-05-15CHINA CONSTR EIGHTH ENG BUREAU TECH CONSTR CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHINA CONSTR EIGHTH ENG BUREAU TECH CONSTR CO LTD
Filing Date
2025-05-20
Publication Date
2026-05-15

AI Technical Summary

Technical Problem

The adhesive strips at the joints of existing modular buildings do not use weather-resistant materials, making them susceptible to hardening due to temperature differences, ultraviolet radiation, and mechanical stress. Furthermore, the insulation layer lacks a vapor barrier or drainage channels, leading to water accumulation and affecting both waterproofing and insulation performance.

Method used

The structure combines concrete slabs, slope-forming layers, rock wool, non-combustible elastic sealant, waterproof coating, and PE drainage channels. By setting waterproof coatings, filling sealant, and expanding waterstops at the joints, a continuous and seamless waterproof layer is formed in combination with polyurethane waterproof coating. PE drainage channels are installed in the slope-forming layer to drain moisture.

Benefits of technology

It improves the waterproof performance of the joints, enhances the durability of the building, prevents water seepage and mold, maintains thermal insulation performance, and reduces maintenance frequency and cost.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN224244137U_ABST
    Figure CN224244137U_ABST
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Abstract

The utility model relates to a modular building waterproof structure, belongs to the technical field of modular building waterproofing, and particularly relates to a modular building waterproof area abutted seam connector structure which comprises a concrete floor and further comprises a waterproof layer. The slope making layer is fixedly mounted at the top of the concrete floor slab; the rock wool is fixedly installed in a splicing seam of the concrete floor slab, and the space between the rock wool is filled with non-combustible elastic sealant; the utility model achieves the effect of improving the waterproof performance of the splicing joint, and solves the problems that the adhesive tape arranged at the existing splicing joint is not made of a weather-resistant material and is easy to harden under the action of temperature difference, ultraviolet rays and mechanical stress, and the thermal insulation layer is not provided with a vapor-proof layer or a drainage channel, so that the service life of the thermal insulation layer is prolonged. The thermal insulation performance is reduced and even mildewing is caused by seepage water accumulation.
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Description

Technical Field

[0001] This utility model relates to the field of modular building waterproofing technology, and in particular to the structure of a modular building waterproofing area splice interface. Background Technology

[0002] Modular building waterproofing technology is a systematic waterproofing solution developed for the characteristics of modular buildings. Its core lies in solving leakage problems in key areas such as joints and penetrations of modular units through the collaborative design of factory prefabrication and on-site assembly.

[0003] A search revealed Chinese patent CN216587067U, which discloses a waterproof structure for the bottom seam of a modular building with two adjacent modular structures. The structure includes galvanized sheets fixed to the outer bottom walls of two adjacent modular buildings. An adhesive strip is installed along the length of the bottom seam between the two adjacent modular buildings. An insulation layer is laid on the inner bottom wall on both sides of the seam. A first load-bearing plate is installed above each insulation layer, and a second load-bearing plate is installed above the first load-bearing plate. The length of each pair of second load-bearing plates on the left and right sides is shorter than the length of the first load-bearing plates, and they are positioned away from the bottom seam. A cover plate is fixed above the first load-bearing plate between the pairs of second load-bearing plates using fasteners. Compared with existing technologies, this invention provides a waterproof structure at the bottom seam of adjacent modular buildings, preventing leakage and seepage, extending the waterproof lifespan, and reducing the frequency and cost of maintenance for modular buildings.

[0004] Based on the above retrieval methods combined with existing technologies;

[0005] The adhesive strips installed at the seams of the aforementioned patents are not made of weather-resistant materials and are prone to hardening under temperature differences, ultraviolet rays, and mechanical stress. Furthermore, the insulation layer does not have a vapor barrier or drainage channel, which may lead to a decrease in insulation performance or even mold growth due to water seepage and accumulation. Therefore, it has certain limitations. Utility Model Content

[0006] To address the aforementioned technical problems, this utility model proposes a modular structure for the joint interface of waterproof areas in buildings, which improves the waterproof performance at the joint interface and enhances the durability of the building.

[0007] The technical solution to achieve the purpose of this utility model is: a structure for a modular building waterproof area splice interface, including a concrete floor slab, and further comprising;

[0008] A slope-finding layer, which is fixedly installed on top of the concrete floor slab;

[0009] Rock wool, which is fixedly installed in the joints of concrete floor slabs, and the spaces between the rock wool are filled with non-combustible elastic sealant.

[0010] Preferably, a waterproof coating is fixedly installed between the concrete floor slab and the slope-finding layer, a decorative surface layer is fixedly installed on the top of the slope-finding layer, a second waterproof coating is fixedly installed between the slope-finding layer and the decorative surface layer, and sealant is filled between the rock wool and the concrete floor slab.

[0011] Preferably, a PE drainage channel is provided inside the slope-finding layer, the PE drainage channel is aligned with the position of the rock wool, a waterproof membrane is fixedly installed between the PE drainage channel and the waterproof coating, and expansion waterstop strips are fixedly installed on both sides of the slope-finding layer.

[0012] Compared with existing technologies, the significant advantages of this invention are:

[0013] Firstly, this utility model incorporates 5% water-repellent agent into the cement mortar slope-finding layer, which can significantly improve its waterproof performance, reduce water penetration, and thus improve overall durability. The two ends are filled with water-swellable waterstop strips, which generate huge contact pressure between the waterstop strips and the cement mortar slope-finding layer of the module itself, ensuring the waterproof effect. In addition, the waterproof membrane has high elongation and tensile strength, which can effectively resist structural deformation.

[0014] Secondly, the polyurethane waterproof coating provided by this utility model effectively blocks the penetration of water molecules and has high impermeability; in addition, the rock wool, non-combustible elastic sealant and waterproof and fireproof sealant meet the basic fireproof and waterproof functions of the modular joints. Furthermore, the addition of PE drainage channels allows water to drain out through the channels, preventing it from seeping into the concrete structural layer and causing steel corrosion or concrete carbonization, thus improving the overall durability of the building.

[0015] This solution addresses the problem that existing adhesive strips installed at joints are not made of weather-resistant materials, making them prone to hardening under temperature differences, ultraviolet radiation, and mechanical stress. Furthermore, the lack of a vapor barrier or drainage channels in the insulation layer may lead to decreased insulation performance or even mold growth due to water seepage and accumulation. Attached Figure Description

[0016] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a first-view structural schematic diagram provided in one embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the second-view structure provided in two embodiments of the present invention;

[0019] Figure 3 This is a front structural diagram provided in two embodiments of the present invention.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Concrete floor slab; 2. Slope-finishing layer; 3. Decorative surface layer; 4. Rock wool; 5. Non-combustible elastic sealant; 6. Waterproof coating one; 7. Waterproof coating two; 8. Expansion waterstop strip; 9. Waterproof membrane; 10. PE drainage channel. Detailed Implementation

[0022] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0023] This utility model provides an improved structure for the joint interface of a modular building waterproof area. The technical solution of this utility model is as follows:

[0024] Example 1

[0025] like Figure 1-2 As shown, it includes a concrete floor slab 1, which provides a waterproof foundation, and also includes;

[0026] Slope-finding layer 2 is fixedly installed on the top of concrete floor slab 1. The structural slope-finding directly utilizes the roof structural layer to form the slope, without the need for additional materials, saving costs and reducing load, and providing better long-term stability.

[0027] Rock wool 4 is fixedly installed in the joints of the concrete floor slab 1. The spaces between the rock wool 4 are filled with non-combustible elastic sealant 5. Rock wool 4 has thermal insulation and fireproofing effects, meeting the structural requirements.

[0028] Furthermore, a waterproof coating 6 is fixedly installed between the concrete floor slab 1 and the slope-forming layer 2, a decorative surface layer 3 is fixedly installed on the top of the slope-forming layer 2, a waterproof coating 7 is fixedly installed between the slope-forming layer 2 and the decorative surface layer 3, and a sealant is filled between the rock wool 4 and the concrete floor slab 1. The waterproof coating is a polyurethane waterproof coating, which is cured into a film through a chemical reaction to form a continuous and seamless elastic waterproof layer, effectively preventing water penetration.

[0029] Example 2:

[0030] Based on the construction of a modular building waterproof area joint interface provided in the first embodiment of this application, the second embodiment of this application proposes another construction of a modular building waterproof area joint interface. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0031] The second embodiment of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0032] like Figure 3 As shown, a PE drainage channel 10 is provided inside the slope-finding layer 2. The PE drainage channel 10 is aligned with the position of the rock wool 4. A waterproof membrane 9 is fixedly installed between the PE drainage channel 10 and the waterproof coating 6. Expansion waterstop strips 8 are fixedly installed on both sides of the slope-finding layer 2. Through its smooth inner wall and flexibility, the PE channel can form a continuous and leak-free water guiding channel inside the slope-finding layer 2, which can quickly guide the rainwater or condensate that seeps into the slope-finding layer 2 to the drainage system, avoiding water retention that could cause the insulation layer to absorb water and fail or the waterproof layer to bulge.

[0033] The technical means disclosed in this utility model are not limited to those described above, but also include technical solutions composed of equivalent substitutions of the above technical features. Matters not covered in this utility model are common knowledge to those skilled in the art.

Claims

1. A structure for a modular building waterproof area joint interface, comprising a concrete floor slab (1), characterized in that: Also includes; Slope-finding layer (2), which is fixedly installed on top of concrete floor slab (1); Rock wool (4) is fixedly installed in the joint of the concrete floor slab (1), and non-combustible elastic sealant (5) is filled between the rock wool (4).

2. The structure of a modular building waterproof area joint interface according to claim 1, characterized in that: A waterproof coating (6) is fixedly installed between the concrete floor slab (1) and the slope-finding layer (2). A decorative surface layer (3) is fixedly installed on the top of the slope-finding layer (2). A waterproof coating (7) is fixedly installed between the slope-finding layer (2) and the decorative surface layer (3). A sealant is filled between the rock wool (4) and the concrete floor slab (1).

3. The structure of a modular building waterproof area joint interface according to claim 1, characterized in that: The slope-finding layer (2) has a PE drainage channel (10) inside. The PE drainage channel (10) is aligned with the rock wool (4). A waterproof membrane (9) is fixedly installed between the PE drainage channel (10) and the waterproof coating (6). Expansion waterstop strips (8) are fixedly installed on both sides of the slope-finding layer (2).