A modular building joint waterproofing structure

Abstract

This utility model relates to the field of modular building technology, and more particularly to a waterproof structure at the joints of modular buildings. A vertically extending first waterproof layer is filled between a water-guiding cavity and a vertical pressure groove. A spiral guide extends downwards to the bottom of the cast-in-place floor slab. Below the spiral guide is a downwardly inclined guide pipe that communicates with the outdoor environment. Below the guide pipe is a downwardly inclined second waterproof layer, which separates the vertical joints of the upper and lower concrete modules. Its advantages are that the U-shaped channel of the spiral guide and the inclined guide pipe achieve multi-layer directional water guidance. Combined with the second waterproof layer separating the upper and lower concrete modules and the vertical first waterproof layer, a multi-level drainage barrier is formed, effectively preventing leakage from spreading to the interior or lower floors. The spiral design enhances the self-drainage efficiency of the water flow, significantly improving the impermeability and durability of the joints.

Description

Technical Field

[0001] This utility model relates to the field of modular building technology, and in particular to a waterproof structure at the joints of modular building. Background Technology

[0002] In recent years, with the acceleration of the industrialization of construction, modular concrete buildings have been widely used in the field of prefabricated buildings due to their advantages such as short construction cycle, controllable quality, and significant environmental benefits. However, the waterproofing problem of modular concrete buildings has always been a technical bottleneck restricting their large-scale promotion. When multiple concrete modules are spliced ​​together, a multi-layer modular building is formed. Each layer has multiple adjacent concrete modules, and joints are formed between adjacent concrete modules. These joints include vertical joints 1 and horizontal joints 7. Vertical joints 1 are formed between two adjacent concrete modules on the left and right sides. A cast-in-place floor slab is set between the upper and lower concrete modules, and horizontal joints 7 are formed between the cast-in-place floor slab and the splice gap between the floor slab and the two adjacent concrete modules below it. In the construction of modular buildings, vertical joints 1 are equipped with vertical pressure grooves 11 and water guiding cavities 12 at their edges. The vertical pressure grooves 11 are located at the rear end of the vertical joints 1, and are grooved to the left and right along the rear end of the vertical joints 1. The two grooves of the vertical joints 1 are joined together to form the vertical pressure grooves 11. The water guiding cavities 12 are set longitudinally along the vertical joints 1, and their cross-section is approximately circular. The water guiding cavities 12 of the upper and lower layers are connected. In cases of rain, water accumulation on upper floors, or water pipe leakage, the risk of leakage at the vertical joints 1 is particularly prominent.

[0003] In existing technologies, waterproofing of vertical seams in modular buildings often involves sealing with foam core rods followed by the application of waterproof sealant. Foam core rods are rod-shaped materials containing a foam structure, with densely packed, uniformly distributed or specifically structured air bubbles forming a lightweight, porous core layer. The outer layer can be laminated with other materials (such as rigid plastics, fiber layers, etc.) to enhance performance. This material combines lightweight and functionality, possessing excellent cushioning, shock absorption, thermal insulation, sound insulation, and structural support capabilities. Waterproof sealant is a material primarily composed of polymers (such as silicone, polyurethane, acrylic, etc.), possessing both adhesive and sealing functions. Through curing, it forms an elastic or plastic adhesive layer that effectively blocks the penetration of water, moisture, dust, and gases, while adapting to displacement and deformation of the substrate due to temperature and vibration. Its characteristics include good adhesion, weather resistance, elastic recovery, and aging resistance, allowing it to function stably in complex environments such as high and low temperatures and humidity. Although this method is simple to implement, conventional waterproof sealants are prone to aging and cracking under temperature and humidity cycles, making it difficult to ensure effective waterproofing of the vertical joints in modular buildings. Moreover, water that seeps into the vertical joints cannot be drained and can easily continue to erode the waterproofing structure.

[0004] Therefore, there is an urgent need for a durable, modular building joint waterproofing structure that can drain water from vertical joints. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, this utility model provides a modular building joint waterproof structure, which solves the technical problem that the existing joint waterproofing measures cannot drain water from the vertical joint and are not durable.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0009] This utility model embodiment provides a waterproof structure for the joints of modular buildings, including a vertical joint. The vertical joint includes a vertical pressure groove and a water-guiding cavity. A first waterproof layer extending vertically is filled between the water-guiding cavity and the vertical pressure groove. A spiral guide is provided along the inner wall of the water-guiding cavity. The spiral guide extends spirally downward to the bottom of the cast-in-place floor slab. The guide channel of the spiral guide is U-shaped. Below the spiral guide is a downwardly inclined guide pipe that communicates with the outdoor environment. Below the guide pipe is a downwardly inclined second waterproof layer. The first end of the second waterproof layer is connected to the cast-in-place floor slab, and the second end of the second waterproof layer is connected to the first waterproof layer. The second waterproof layer separates the vertical joints corresponding to the upper concrete module and the vertical joints corresponding to the lower concrete module.

[0010] Optionally, the vertical groove is filled with waterproof mortar, and several U-shaped waterstops are embedded in the waterproof mortar from top to bottom, with the U-shaped waterstops facing the inside of the vertical joint, compressing the first waterproof layer.

[0011] Optionally, the U-shaped waterstop is provided with serrated anti-slip teeth on both sides, which interlock with the waterproof mortar.

[0012] Optionally, the inner wall of the guide tube is provided with threaded reinforcing ribs.

[0013] Optionally, the inlet of the guide pipe is funnel-shaped.

[0014] Optionally, a lightweight valve is also provided at the outlet of the guide pipe, which can be opened when water flows through and closed when there is no water flow.

[0015] Optionally, the joint also includes a horizontal joint, where a T-shaped adhesive strip and a third waterproof layer are provided from top to bottom; the T-shaped adhesive strip includes a horizontal part that fits against the top of the horizontal joint and a protruding part that extends downward along the horizontal joint, the protruding part abutting against the inner wall of the horizontal joint; the top of the second waterproof layer is at the same height as the top of the horizontal joint.

[0016] Optionally, a spring sheet is provided in the middle of the protrusion, and the spring sheet abuts against the side of the horizontal seam.

[0017] Optionally, the bottom of the horizontal section is wavy, and the third waterproof layer includes waterproof sealant, with the T-shaped strip fixed to the top of the horizontal joint by the waterproof sealant.

[0018] Optionally, the drainage pipe is connected to the cast-in-place floor slab through a water-conducting fiber, which extends along the top of the horizontal joint towards the front of the cast-in-place floor slab to drain water from the cast-in-place floor slab.

[0019] (III) Beneficial Effects

[0020] The beneficial effects of this utility model are:

[0021] This utility model provides a waterproof structure for the joints of modular buildings, including a vertical joint. The vertical joint includes a vertical pressure groove and a water-guiding cavity. A first waterproof layer extending vertically is filled between the water-guiding cavity and the vertical pressure groove. A spiral guide is provided along the inner wall of the water-guiding cavity. The spiral guide extends spirally downward to the bottom of the cast-in-place floor slab. The guide channel of the spiral guide is U-shaped. Below the spiral guide is a downwardly inclined guide pipe that communicates with the outdoor environment. Below the guide pipe is a downwardly inclined second waterproof layer. The first end of the second waterproof layer is connected to the cast-in-place floor slab, and the second end of the second waterproof layer is connected to the first waterproof layer. The second waterproof layer separates the vertical joints corresponding to the upper concrete module and the vertical joints corresponding to the lower concrete module. Compared to existing technologies, the U-shaped channel of the spiral guide component and the inclined guide pipe achieve multi-layer directional water guidance. Combined with the second waterproof layer that isolates the upper and lower concrete modules and the vertical first waterproof layer, a multi-level drainage barrier is formed, which effectively prevents leakage from spreading to the interior or lower floors. The spiral design enhances the self-drainage efficiency of the water flow and significantly improves the impermeability and durability of the joints. Attached Figure Description

[0022] Figure 1 This is a top view of Embodiment 1 of the modular building joint waterproofing structure of this utility model;

[0023] Figure 2 for Figure 1 A cross-sectional view along the AA direction of the waterproofing structure at the joint of the modular building is shown.

[0024] Figure 3 for Figure 1 A partial structural diagram of the waterproofing structure at point B in the modular building joint is shown.

[0025] Figure 4 for Figure 1 The diagram shows a top view of the waterproofing structure at the joints of a modular building, taken from the cast-in-place floor slab.

[0026] Figure 5 for Figure 1A side view of a U-shaped waterstop in a waterproof structure at the joint of a modular building, shown.

[0027] Figure 6 This is a schematic diagram of the horizontal joint of a second embodiment of the modular building joint waterproofing structure of this utility model.

[0028] Figure 7 for Figure 6 The diagram shown illustrates the structural design of the horizontal joint of the cast-in-place floor slab layer, including the composite beam cast-in-place layer, for the waterproofing structure at the joint of the modular building.

[0029] Figure 8 for Figure 6 The front view shows a T-shaped adhesive strip in the waterproof structure at the joint of a modular building.

[0030] [Explanation of Labels in the Attached Image]

[0031] 1: Vertical seam; 11: Vertical groove; 12: Water guide cavity;

[0032] 2: First waterproof layer;

[0033] 3: Spiral guide component;

[0034] 4: Guide tube;

[0035] 5: Second waterproof layer;

[0036] 6: U-shaped waterstop plate;

[0037] 7: Horizontal seams;

[0038] 8: T-shaped rubber strip; 81: Horizontal section; 82: Protrusion; 83: Spring sheet;

[0039] 9: Third waterproof layer;

[0040] 10: Water-wicking fiber. Detailed Implementation

[0041] To better explain and facilitate understanding of this utility model, a detailed description of its specific embodiments is provided below with reference to the accompanying drawings. In this document, directional terms such as "upper," "lower," "left," "right," "front," and "rear" are used interchangeably with other directional terms. Figure 1 The orientation is used as a reference.

[0042] Example 1:

[0043] Reference Figures 1 to 5 This embodiment proposes a waterproof structure for the joints of modular buildings, used to waterproof the vertical joints 1 in modular buildings. Specifically, the waterproof structure for the joints of modular buildings in this embodiment includes a vertical joint 1, which includes a vertical pressure groove 11 and a water-guiding cavity 12.

[0044] In this embodiment, a vertically extending first waterproof layer 2 is filled between the water guiding cavity 12 and the vertical pressure groove 11. A spiral guide 3 is provided along the inner wall of the water guiding cavity 12. The spiral guide 3 spirally extends downward to the bottom of the cast-in-place floor slab. The guide channel of the spiral guide 3 is U-shaped. Below the spiral guide 3, there is a downwardly inclined guide pipe 4 that communicates with the outdoor environment. Below the guide pipe 4, there is a downwardly inclined second waterproof layer 5. The first end of the second waterproof layer 5 is connected to the cast-in-place floor slab, and the second end of the second waterproof layer 5 is connected to the first waterproof layer 2. The second waterproof layer 5 separates the vertical joint 1 corresponding to the upper concrete module and the vertical joint 1 corresponding to the lower concrete module.

[0045] Specifically, the first waterproof layer 2 separates the vertical pressure groove 11 from the outdoor environment, preventing external moisture from entering the vertical joint 1. The spiral guide 3 spirals downwards along the inner wall of the water-guiding cavity 12. Water moving downwards along the inner wall is caught by the spiral guide 3 and flows downwards along its channel, reducing contact between water and the concrete module in the vertical joint 1 and preventing leakage. The length of the spiral guide 3 varies with the height of indoor water seepage. Since common indoor water pipes are relatively low, a continuous spiral guide 3 is not necessary; the U-shaped channel effectively receives the downward-flowing water. The guide pipe 4 is located below the spiral guide 3. Water flowing through the spiral guide 3 is received by the guide pipe 4 and flows diagonally downwards along it to the outdoor environment for discharge. The second waterproof layer 5 can support the guide pipe 4 and the spiral guide component 3, and separate the part connecting the upper and lower concrete modules along the cast-in-place floor slab. At the same time, it seals the separated parts to prevent water from seeping downwards.

[0046] In summary, compared to existing technologies, the U-shaped channel of the spiral guide component 3 and the inclined guide pipe 4 achieve multi-layer directional water guidance. Combined with the second waterproof layer 5 that isolates the upper and lower layers and the vertical first waterproof layer, a multi-level drainage barrier is formed, effectively preventing leakage from spreading to the interior or lower floors. The spiral design enhances the efficiency of water flow self-drainage, and the modular construction balances waterproof reliability with ease of construction, significantly improving the impermeability and durability at the joints.

[0047] Furthermore, the vertical groove 11 is filled with waterproof mortar, and several U-shaped waterstops 6 are embedded in the waterproof mortar from top to bottom. The U-shaped waterstops 6 face the inside of the vertical joint 1, compressing the first waterproof layer 2. In order to enhance the waterproof performance at the vertical joint 1, a multi-level drainage barrier is formed by filling the vertical groove 11 with waterproof mortar. Moreover, the U-shaped waterstops 6 embedded in the waterproof mortar can compress the first waterproof layer 2. The arched part of the U-shaped waterstops 6 abuts against the first waterproof layer 2, preventing the first waterproof layer 2 from moving and reducing the risk of leakage. Multiple U-shaped waterstops 6 are vertically distributed along the vertical groove 11.

[0048] Furthermore, both sides of the U-shaped waterstop 6 are provided with serrated anti-slip teeth, which interlock with the waterproof mortar. In order to further enhance the connection strength between the U-shaped waterstop 6 and the waterproof mortar, the serrated anti-slip teeth on both sides of the U-shaped waterstop 6 can interlock with the waterproof mortar and prevent the U-shaped waterstop 6 from falling out of its original position.

[0049] Furthermore, the inner wall of the diversion pipe 4 is provided with threaded reinforcing ribs. Traditional drainage pipes are easily damaged in areas where stress is concentrated due to the impact of water flow. At the same time, water in the vertical joint 1 seeps out or passes through the concrete module, thus carrying some fine solid particles. In order to enhance the strength and durability of the diversion pipe 4, threaded reinforcing ribs are provided on the inner wall of the diversion pipe 4, which can improve the strength of the diversion pipe 4 and thus enhance its durability.

[0050] Furthermore, the inlet of the guide pipe 4 is funnel-shaped. The spiral guide component 3 discharges water into the inlet of the guide pipe. The funnel-shaped inlet is conducive to collecting water in the spiral guide component 3. Moreover, the guide pipe 4 can be made of stainless steel, plastic, or other materials with a certain strength and corrosion resistance.

[0051] Furthermore, a lightweight valve is rotatably installed at the outlet of the guide pipe 4. This valve can be opened when water flows through it and closed when there is no water flow. Since the guide pipe 4 is a straight channel, strong winds could blow debris into the outlet facing the outdoor environment, potentially clogging it. Moreover, the constant flow of wind or dust from the outdoor environment into the vertical joint 1 is also a disadvantage. Therefore, by rotatably installing a lightweight valve at the top of the outlet of the guide pipe 4, the valve can rotate along the top of the outlet. When there is water flow, the valve is pushed open by the water flow to discharge water. When there is no water flow, the valve closes automatically under gravity, and outdoor winds cannot open the valve, thus protecting the interior of the vertical joint 1.

[0052] Example 2:

[0053] Reference Figures 6 to 8In this embodiment, the waterproof structure at the joint of the modular building also includes a horizontal joint 7. When there are cracks in the cast-in-place floor slab, water can easily enter and store in the cast-in-place floor slab. As the water seeps downward, it flows to the horizontal joint 7 and causes erosion to the concrete module. The difference between this embodiment and embodiment 1 is that a T-shaped adhesive strip 8 is set at the horizontal joint 7 to prevent water in the cast-in-place floor slab from seeping downward along the horizontal joint 7. The details are as follows.

[0054] In this embodiment, a T-shaped adhesive strip 8 and a third waterproof layer are sequentially provided at the horizontal seam 7 from top to bottom. The T-shaped adhesive strip 8 includes a horizontal portion 81 that fits against the top of the horizontal seam 7 and a protruding portion 82 that extends downward along the horizontal seam 7, with the protruding portion 82 abutting against the inner wall of the horizontal seam 7. The top of the second waterproof layer 5 is at the same height as the top of the horizontal seam 7.

[0055] Specifically, a cast-in-place floor slab is a structure between upper and lower concrete modules. Therefore, a cast-in-place floor slab also includes cases where the bottom of the cast-in-place floor slab is a composite beam or cast-in-place layer. The composite beam or cast-in-place layer and the cast-in-place floor slab connected to it are a single unit. Therefore, when a horizontal joint is formed between the cast-in-place floor slab and the joint between the two adjacent concrete modules below it, the composite beam or cast-in-place layer that abuts against the joint between the two adjacent concrete modules below it also forms a horizontal joint. Figure 6 To create a horizontal joint between the cast-in-place floor slab and the joint between the two adjacent concrete modules below it, and Figure 7 A horizontal joint is formed between the cast-in-place layer of the composite beam and the joint between the two adjacent concrete modules below it. A T-shaped adhesive strip 8 completely covers the horizontal joint 7, preventing water from seeping downwards from the cast-in-place floor slab. The horizontal portion 81 covers the top of the horizontal joint 7, preventing water from passing through it, while the raised portion 82 fits snugly against both sides of the horizontal joint 7, enhancing the waterproofing performance of the T-shaped adhesive strip 8. Furthermore, the top of the second waterproof layer 5 is at the same height as the top of the horizontal joint 7. Therefore, since the height of the cast-in-place floor slab is higher than the height of the second waterproof layer 5, water in the cast-in-place floor slab can flow to lower positions under gravity.

[0056] Furthermore, a spring sheet 83 is provided in the middle of the protrusion 82, and the spring sheet 83 abuts against the side of the horizontal joint 7. The spring sheet 83 provided in the middle of the protrusion 82 has a certain elasticity. When it is compressed in the horizontal joint 7, it applies a reaction force to both sides of the horizontal joint 7, and can have a strong frictional force with the side of the horizontal joint 7 to prevent the T-shaped rubber strip 8 from shifting.

[0057] Furthermore, the bottom of the horizontal section 81 is wavy, and the third waterproof layer includes waterproof sealant. The T-shaped adhesive strip 8 is fixed to the top of the horizontal joint 7 by the waterproof sealant. In order to increase the contact area at the bottom of the T-shaped adhesive strip 8, the bottom of the horizontal section 81 is wavy. The waterproof sealant can fully fix the T-shaped adhesive strip 8 to the top of the horizontal joint 7, improve the fixing strength of the T-shaped adhesive strip 8, and also improve the sealing performance of the T-shaped adhesive strip 8.

[0058] Furthermore, the diversion pipe 4 is connected to the cast-in-place floor slab layer via water-conducting fibers 10. The water-conducting fibers 10 extend along the top of the horizontal joint 7 towards the front of the cast-in-place floor slab layer to drain water from the floor slab layer. The water-conducting fibers 10 can guide water through the gaps in the water-conducting fibers 10 to a lower level. Therefore, water can be drawn from the cast-in-place floor slab layer into the diversion pipe 4 through the water-conducting fibers 10, which extend along the direction of the horizontal joint 7 within the cast-in-place floor slab layer.

[0059] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0060] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0061] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0062] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0063] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A waterproof structure for the joints of modular building components, comprising a vertical joint (1), wherein the vertical joint (1) includes a vertical pressure groove (11) and a water-guiding cavity (12), characterized in that: A vertically extending first waterproof layer (2) is filled between the water guiding cavity (12) and the vertical pressure groove (11). A spiral guide (3) is provided on the inner wall of the water guiding cavity (12). The spiral guide (3) spirally extends downward to the bottom of the cast-in-place floor slab. The guide channel of the spiral guide (3) is U-shaped. A downwardly inclined guide pipe (4) is provided below the spiral guide (3) and communicates with the outdoor environment. A downwardly inclined second waterproof layer (5) is provided below the guide pipe (4). The first end of the second waterproof layer (5) is connected to the cast-in-place floor slab. The second end of the second waterproof layer (5) is connected to the first waterproof layer (2). The second waterproof layer (5) separates the vertical joint (1) corresponding to the upper concrete module and the vertical joint (1) corresponding to the lower concrete module.

2. The waterproof structure at the joints of modular building structures as described in claim 1, characterized in that: The vertical groove (11) is filled with waterproof mortar, and several U-shaped waterstops (6) are embedded in the waterproof mortar from top to bottom. The U-shaped waterstops (6) face the inside of the vertical joint (1) and squeeze the first waterproof layer (2).

3. The waterproof structure at the joints of modular building structures as described in claim 2, characterized in that: The U-shaped waterstop (6) has serrated anti-slip teeth on both sides, and the anti-slip teeth engage with the waterproof mortar.

4. The waterproof structure at the joints of modular building structures as described in claim 1, characterized in that: The inner wall of the guide tube (4) is provided with threaded reinforcing ribs.

5. The waterproof structure at the joints of modular building structures as described in claim 1, characterized in that: The inlet of the guide pipe (4) is funnel-shaped.

6. The waterproof structure at the joints of modular building structures as described in claim 1, characterized in that: The outlet of the guide pipe (4) is also equipped with a lightweight valve that can be opened when water flows through it and closed when there is no water flow.

7. The waterproof structure at the joints of modular building structures as described in claim 1, characterized in that: The seam also includes a horizontal seam (7), at which a T-shaped adhesive strip (8) and a third waterproof layer (9) are provided from top to bottom. The T-shaped adhesive strip (8) includes a horizontal part (81) that fits against the top of the horizontal seam (7) and a protrusion (82) that extends downward along the horizontal seam (7), the protrusion (82) abutting against the inner wall of the horizontal seam (7). The top of the second waterproof layer (5) is at the same height as the top of the horizontal joint (7).

8. The waterproof structure at the joints of modular building structures as described in claim 7, characterized in that: The protrusion (82) has a spring sheet (83) in the middle, and the spring sheet (83) abuts against the side of the horizontal seam (7).

9. The waterproof structure at the joints of modular building structures as described in claim 7, characterized in that: The bottom of the horizontal section (81) is wavy, the third waterproof layer (9) includes waterproof sealant, and the T-shaped adhesive strip (8) is fixed to the top of the horizontal joint (7) by the waterproof sealant.

10. The waterproof structure at the joints of modular building as described in claim 7, characterized in that: The guide pipe (4) is connected to the cast-in-place floor slab through a water-conducting fiber (10). The water-conducting fiber (10) extends along the top of the horizontal joint (7) towards the front of the cast-in-place floor slab to drain the water in the cast-in-place floor slab.

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