Waterproof structure at joint of fair-faced concrete wall and basement top plate

Abstract

The utility model relates to the relative technical field of building waterproof structures, in particular to a waterproof structure at the joint of a fair-faced concrete wall and a basement top plate, which comprises a drainage body arranged at the side end of the joint of the fair-faced concrete wall and the basement top plate. A construction joint is arranged at the joint of the bottom of the bare concrete wall and the basement top plate, a V-shaped groove is formed in the side, facing the drainage body, of the construction joint, and low-modulus polysulfide sealant is embedded in the V-shaped groove. The drainage ditch with the depth of 500 mm is used for meeting the requirement that the flashing height arranged at the position, adjacent to an overground building, of the basement is larger than or equal to 500 mm than earthing or a site, and the V-shaped groove is formed in the construction joint position of the junction of the bare concrete wall and the basement top plate. And the low-modulus polysulfide sealant is embedded, so that the problem of leakage at the joint of the basement roof and the overground wall body under the condition that the flashing height is not higher than the field is solved.

Description

A waterproof structure at the junction of fair-faced concrete wall and basement roof slab Technical Field

[0001] This utility model relates to the technical field of building waterproofing structures, specifically a waterproofing structure at the junction of fair-faced concrete walls and basement roof slabs. Background Technology

[0002] According to the national standard GB55030-2022, "General Specification for Waterproofing of Building and Municipal Engineering", the waterproofing design of basement roof slabs in civil buildings should comply with the following regulations: "Flashing should be provided at locations adjacent to above-ground buildings, and should be at least 500mm higher than the soil cover or site." This provision is highly applicable to conventional walls or curtain walls and other exterior wall forms. However, existing standards do not provide specific treatment methods for the flashing joint between fair-faced concrete walls and basement roof slabs with waterproofing membranes. This may be due to the special characteristics of fair-faced concrete walls (such as smooth surface and high durability) and the construction characteristics of waterproofing membranes (such as the need to consider membrane overlap and protective layer settings), which necessitates more detailed consideration in the design of flashing joints.

[0003] Today, exposed concrete is favored for its smooth and delicate surface and good decorative properties. However, its impermeability is relatively weak and it is easily affected by the external environment. Because exposed concrete walls cannot be plastered, if the waterproofing membrane on the basement ceiling is extended 500mm upwards as normal, it needs to be protected with mortar. This results in the exposed concrete exterior wall not achieving the expected effect, making it difficult to simultaneously ensure the effectiveness of the waterproofing on the basement ceiling flashing while maintaining the desired appearance of the exposed concrete exterior wall. Summary of the Invention

[0004] The purpose of this utility model is to provide a waterproof structure at the junction of fair-faced concrete wall and basement roof slab to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A waterproof structure at the junction of fair-faced concrete wall and basement roof slab, comprising a drainage body located at the side end of the junction between the fair-faced concrete wall and the basement roof slab.

[0007] A construction joint is provided at the junction of the bottom of the fair-faced concrete wall and the top slab of the basement. A V-shaped groove is formed on the side of the construction joint facing the drainage body, and a low-modulus polysulfide sealant is embedded in the V-shaped groove.

[0008] It also includes a waterproof layer that extends downwards from the basement roof slab to the drainage system.

[0009] The waterproof structure at the junction of the fair-faced concrete wall and the basement roof slab as described above: a decorative layer is provided on the side of the fair-faced concrete wall, and the drainage body is located at the lower end of the decorative layer.

[0010] The waterproof structure at the junction of the fair-faced concrete wall and the basement roof slab as described above: the drainage body includes a recessed drainage ditch, and the inlet of the drainage ditch is located on the decorative layer.

[0011] The waterproofing structure at the junction of the fair-faced concrete wall and the basement roof, as described above, is as follows: the drainage ditch is constructed as a V-shaped trench with a drainage slope at the bottom.

[0012] The waterproof structure at the junction of the fair-faced concrete wall and the basement roof slab as described above: the waterproof layer extends downward from the basement roof slab into the drainage ditch, and is completed at the basement roof slab location.

[0013] The waterproof structure at the junction of the fair-faced concrete wall and the basement roof slab as described above: the waterproof layer includes a waterproof membrane and a reinforcing layer, with the reinforcing layer disposed on the base surface of the basement roof slab and the drainage ditch.

[0014] The waterproofing structure at the junction of the fair-faced concrete wall and the basement roof slab as described above: the junction of the fair-faced concrete wall and the decorative layer is filled with polyurethane sealant.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] The 500mm deep drainage ditch meets the requirement that the flashing height at the location where the basement is adjacent to the above-ground building should be no less than 500mm higher than the soil cover or site. A V-shaped groove is set at the construction joint where the fair-faced concrete wall meets the basement roof slab, and low-modulus polysulfide sealant is embedded in it to give it a certain degree of elasticity, which further effectively prevents leakage at the construction joint. This solves the problem of leakage at the junction of the basement roof slab and the above-ground wall when the flashing height is not higher than the site, ensuring the effect of fair-faced concrete exterior wall while ensuring the effectiveness of waterproof flashing of basement roof slab. Attached Figure Description

[0017] Figure 1 is a schematic elevation view of the waterproof structure at the junction of the fair-faced concrete wall and the basement roof.

[0018] In the diagram: 1. Fair-faced concrete wall; 2. Basement roof slab; 3. Waterproof layer; 4. Drainage ditch; 5. Decorative layer; 6. Construction joint; 7. Low-modulus polysulfide sealant; 8. Polyurethane sealant. Detailed Implementation

[0019] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0020] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0021] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, methods, means, and elements well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0022] Please refer to Figure 1. In this embodiment of the present invention, a waterproof structure at the junction of fair-faced concrete wall and basement roof slab includes a drainage body located at the side end of the connection between fair-faced concrete wall 1 and basement roof slab 2.

[0023] A construction joint 6 is provided at the junction of the bottom of the fair-faced concrete wall 1 and the basement roof slab 2. A V-shaped groove is formed on the side of the construction joint 6 facing the drainage body, and a low-modulus polysulfide sealant 7 is embedded in the V-shaped groove.

[0024] It also includes a waterproof layer 3, which extends downward from the basement roof slab 2 to the drainage system.

[0025] In this embodiment, the design of construction joint 6 effectively prevents moisture from seeping in along it. This design utilizes low-modulus polysulfide sealant 7 to fill the V-groove, which not only enhances the sealing performance but also improves the overall waterproofing capability of construction joint 6. Low-modulus polysulfide sealant 7 has good water resistance and elasticity, maintaining stability during long-term use and preventing leakage problems caused by temperature changes or structural deformation.

[0026] Fair-faced concrete is currently favored in the market due to its smooth and delicate surface and good decorative properties. However, its impermeability is relatively weak and it is easily affected by the external environment. By using a combination of low-modulus polysulfide sealant 7 and waterproof layer 3 to fill the construction joint 6, the aesthetic effect of fair-faced concrete is preserved while the waterproof performance of the overall structure is improved.

[0027] It should be noted that the elastic modulus of low-modulus polysulfide sealant 7 is not greater than 0.4 MPa, and the filling depth is not less than 2 / 3 of the depth of the V-groove.

[0028] A decorative layer 5 is provided on one side of the fair-faced concrete wall 1, and the drainage body is located at the lower end of the decorative layer 5.

[0029] As a further embodiment of this invention, the drainage body includes a recessed drainage ditch 4, and the inlet of the drainage ditch 4 is disposed on the decorative layer 5.

[0030] Specifically, the drainage ditch 4 has a depth of 500mm, which meets the specification requirement that the height of the flooding rises no less than 500mm above the site.

[0031] Preferably, the construction joint 6 between the fair-faced concrete wall 1 and the basement roof slab 2 is located on the inner edge of the drainage ditch 4, and the distance from the root of the fair-faced concrete wall 1 is no more than 100mm.

[0032] The drainage ditch 4 is constructed as a V-shaped ditch with a drainage slope at the bottom.

[0033] It should be noted that the slope range is 1%-3%, which can ensure smooth water flow and avoid drainage problems or increased construction difficulty caused by an excessively large or small slope.

[0034] Preferably, the waterproof layer 3 extends downward from the basement roof slab 2 into the drainage ditch 4, and is finished at the basement roof slab 2.

[0035] The waterproof layer 3 extends downwards from the basement roof slab 2 to the drainage system. This continuous waterproof structure effectively prevents moisture from seeping from the basement roof slab 2 into the walls or floor. This design adheres to the principle of "prevention first, combined with drainage," further reducing the risk of leakage by minimizing the impact of water accumulation on the structure.

[0036] Preferably, the waterproof layer 3 includes a waterproof membrane and a reinforcing layer, with the reinforcing layer disposed on the base surface of the basement roof slab 2 and the drainage ditch 4. These reinforcing layers enhance the waterproofing effect, ensuring the waterproof performance of the basement roof slab 2.

[0037] Preferably, the junction between the fair-faced concrete wall 1 and the decorative layer 5 is filled with polyurethane sealant 8. Polyurethane sealant 8 is a high-performance sealing material with good adhesion, elasticity, water resistance, and weather resistance, suitable for sealing joints in various building structures. It can effectively prevent the penetration of moisture, gas, and liquid, while also possessing excellent durability and anti-aging properties.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A waterproof structure at the junction of a fair-faced concrete wall and a basement roof slab, characterized in that; It includes a drainage body located at the side of the connection between the fair-faced concrete wall (1) and the basement roof slab (2); a construction joint (6) is provided at the junction of the bottom of the fair-faced concrete wall (1) and the basement roof slab (2), and a V-shaped groove is formed on the side of the construction joint (6) facing the drainage body, and a low-modulus polysulfide sealant (7) is embedded in the V-shaped groove; it also includes a waterproof layer (3), which extends downward from the basement roof slab (2) to the lower drainage body.

2. The waterproof structure at the junction of fair-faced concrete wall and basement roof slab according to claim 1, characterized in that, The fair-faced concrete wall (1) has a decorative layer (5) on its side, and the drainage body is located at the lower end of the decorative layer (5).

3. The waterproof structure at the junction of fair-faced concrete wall and basement roof slab according to claim 2, characterized in that, The drainage body includes a recessed drainage ditch (4), and the inlet of the drainage ditch (4) is located on the decorative layer (5).

4. The waterproof structure at the junction of fair-faced concrete wall and basement roof slab according to claim 3, characterized in that, The drainage ditch (4) is constructed as a V-shaped ditch with a drainage slope at the bottom.

5. The waterproof structure at the junction of fair-faced concrete wall and basement roof slab according to claim 3, characterized in that, The waterproof layer (3) extends downward from the basement roof slab (2) into the drainage ditch (4) and is finished at the basement roof slab (2).

6. The waterproof structure at the junction of fair-faced concrete wall and basement roof slab according to claim 3, characterized in that, The waterproof layer (3) includes a waterproof membrane and a reinforcing layer, with the reinforcing layer disposed on the base surface of the basement roof slab (2) and the drainage ditch (4).

7. A waterproof structure at the junction of a fair-faced concrete wall and a basement roof slab according to claim 2, characterized in that, The junction between the fair-faced concrete wall (1) and the decorative layer (5) is filled with polyurethane sealant (8).

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