Basement side wall overhanging plate waterproof structure

Abstract

The utility model relates to building waterproof technology field provides a basement side wall cantilevered slab waterproof structure, it includes basement side wall, upper side wall waterproof unit, lower side wall waterproof unit and cantilevered slab waterproof unit, the outside of basement side wall projects and is provided with cantilevered slab reinforcing steel bar reserved concrete convex part, and cantilevered slab reinforcing steel bar reserved concrete convex part is separated and forms upper half wall and lower half wall with basement side wall, upper side wall waterproof unit is correspondingly set up in the lateral side of upper half wall, lower side wall waterproof unit is correspondingly set up in the lateral side of lower half wall, and cantilevered slab waterproof unit is wrapped in the outside of cantilevered slab reinforcing steel bar reserved concrete convex part, and cantilevered slab waterproof unit upper and lower sides respectively correspond to the direction of upper half wall and lower half wall extension, and respectively extend into the lateral side between upper side wall waterproof unit and upper half wall and the lateral side between lower side wall waterproof unit and lower half wall. The application realizes side wall waterproof closure, effectively reduces the risk of side wall waterproof leakage.

Description

Technical Field

[0001] This utility model relates to the field of building waterproofing technology, and in particular to a waterproofing structure for a cantilever slab of a basement side wall. Background Technology

[0002] In the field of architectural engineering, with the increasing diversification of building functions and the continuous innovation of building forms, the application of cantilevered sidewall structures is becoming more and more widespread in underground structures, underground parking garages, and some building projects with special design requirements. Cantilevered sidewalls not only enhance the overall stability of the building structure but also, to a certain extent, meet the requirements of building functionality or landscape design.

[0003] Traditional construction techniques have limitations in the placement of reinforcement bars in the side wall cantilever slabs. Due to limitations in the placement of the reinforcement bars and the construction process, the waterproofing layer cannot effectively extend to the backfill elevation above the cantilever slab; it can only be constructed up to the lower surface of the cantilever slab. This construction method results in a noticeable construction joint between the cantilever slab and the waterproofing layer, and construction joints are often areas prone to leakage problems.

[0004] Furthermore, the cantilever slab itself and the backfill area above it face a high risk of leakage due to the lack of effective waterproofing. Once leakage occurs, it will not only affect the service life and structural safety of the building, but also cause many inconveniences to the building users, such as indoor dampness, mold on the walls, and may even lead to more serious quality problems. Utility Model Content

[0005] This utility model provides a waterproof structure for cantilevered slabs of basement side walls, which solves the defects of existing technologies where the pre-reinforced steel bars in the side wall cantilever slab cannot be waterproofed up to the backfill soil elevation on the cantilever slab, and the waterproofing is only applied to the bottom of the cantilever slab, resulting in the risk of leakage at construction joints, the cantilever slab, and the upper backfill area. This invention achieves closed-loop waterproofing of the side wall and effectively reduces the risk of leakage.

[0006] This utility model provides a waterproof structure for a cantilever slab on a basement side wall, comprising:

[0007] The basement side wall has a cantilevered slab steel reinforcement pre-reserved concrete protrusion on its outer side, which divides the basement side wall into an upper half wall and a lower half wall.

[0008] Upper wall waterproofing unit, the upper wall waterproofing unit is correspondingly installed on the surface of the upper half wall;

[0009] The lower side wall waterproofing unit is correspondingly installed on the surface of the lower half wall;

[0010] A cantilevered waterproof unit is provided, which is wrapped around the outside of the pre-reserved concrete protrusion of the cantilevered slab reinforcement. The upper and lower sides of the cantilevered waterproof unit extend toward the upper half wall and the lower half wall respectively, and extend into the space between the upper side wall waterproof unit and the surface of the upper half wall, and between the lower side wall waterproof unit and the surface of the lower half wall respectively.

[0011] According to the present invention, a waterproof structure for a cantilevered slab of a basement side wall is provided, wherein the waterproof unit of the cantilevered slab is a cement-based penetrating crystalline waterproof material layer.

[0012] According to the waterproof structure of the cantilever slab of the basement side wall provided by this utility model, the thickness of the cement-based penetrating crystalline waterproof material layer is greater than or equal to 1 mm, and the unit area mass of the 1 mm thick cement-based penetrating crystalline waterproof material layer is not less than 1.5 kg / m².

[0013] According to the present invention, the waterproof structure of the cantilever slab of the basement side wall is provided in which the upper side of the waterproof slab extends into the space between the upper side wall waterproof slab and the surface of the upper half wall by a length greater than or equal to 250 mm.

[0014] According to the present invention, the lower side of the cantilevered waterproof structure of the basement side wall is extended into the space between the lower side wall waterproof unit and the surface of the lower half wall by a length greater than or equal to 250 mm.

[0015] According to the present invention, a waterproof structure for a basement side wall cantilever slab is provided, wherein the end of the overlap between the upper side wall waterproof unit and the cantilever slab waterproof unit is sealed with waterproof sealant.

[0016] According to the present invention, a waterproof structure for a basement side wall cantilever slab is provided, wherein the end of the overlap between the lower side wall waterproof unit and the cantilever slab waterproof unit is sealed with waterproof sealant.

[0017] According to the present invention, a waterproof structure for a cantilevered slab of a basement side wall is provided, wherein the upper side wall waterproof unit or the lower side wall waterproof unit includes a waterproof membrane layer and a waterproof protective layer. The waterproof membrane layer is attached to the surface of the upper half wall or the lower half wall, and the waterproof protective layer is located on the other side of the waterproof membrane layer away from the upper half wall or the lower half wall.

[0018] According to the present invention, a waterproof structure for a cantilevered slab of a basement side wall is provided, wherein the ends of the waterproof membrane layer at both ends are connected and fixed to the upper half wall or the lower half wall by connecting nails.

[0019] According to the waterproof structure of the cantilever slab of the basement side wall provided by this utility model, the upper side wall waterproof unit or the lower side wall waterproof unit further includes a waterproof coating layer, which is applied to the surface of the upper half wall or the lower half wall.

[0020] This utility model provides a waterproof structure for a basement side wall cantilever slab. Waterproof units are wrapped around the outside of the pre-reserved concrete protrusions of the cantilever slab reinforcement, extending towards the upper and lower halves of the wall respectively. These units extend into the space between the upper and lower side wall waterproof units and their respective surfaces. This creates a tight connection and overlap between the cantilever slab waterproof units and the upper and lower side wall waterproof units, connecting the upper and lower halves of the wall and the pre-reserved concrete protrusions of the cantilever slab reinforcement into a unified waterproof system. The entire side wall, from the upper half to the cantilever slab and then to the lower half, is covered by the waterproof units, with no obvious waterproof gaps, thus achieving a closed waterproof system and effectively reducing the risk of leakage. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the waterproof structure of the cantilever slab of the basement side wall provided by this utility model.

[0023] Figure label:

[0024] 10. Waterproof structure for cantilevered slabs on basement side walls;

[0025] 100. Basement side wall; 110. Concrete protrusion for cantilever slab reinforcement; 120. Upper half wall; 130. Lower half wall; 200. Waterproofing unit for upper side wall; 300. Waterproofing unit for lower side wall; 400. Waterproofing unit for cantilever slab; 500. Waterproof sealant; 600. Connecting nail; 700. Waterproof membrane layer; 800. Waterproof protective layer. Detailed Implementation

[0026] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0027] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element 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 the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0029] In this embodiment of the 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 that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "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.

[0031] The following is combined with Figure 1The present invention provides a detailed description of a waterproof structure for a cantilevered basement sidewall provided by the present invention through specific embodiments and application scenarios.

[0032] In the embodiments of this utility model, such as Figure 1 As shown, a waterproof structure 10 for a basement sidewall cantilever slab includes a basement sidewall 100, an upper sidewall waterproof unit 200, a lower sidewall waterproof unit 300, and a cantilever slab waterproof unit 400. A cantilever slab reinforced concrete protrusion 110 protrudes from the outer side of the basement sidewall 100, dividing the basement sidewall 100 into an upper half-wall 120 and a lower half-wall 130. The upper sidewall waterproof unit 200 is correspondingly located on the surface of the upper half-wall 120; the lower sidewall waterproof unit 300 is correspondingly located on the surface of the lower half-wall 130; the cantilever slab waterproof unit 400 is wrapped around the outer side of the cantilever slab reinforced concrete protrusion 110, and the upper and lower sides of the cantilever slab waterproof unit 400 extend towards the upper half-wall 120 and the lower half-wall 130 respectively, extending into the space between the upper sidewall waterproof unit 200 and the surface of the upper half-wall 120, and between the lower sidewall waterproof unit 300 and the surface of the lower half-wall 130.

[0033] The basement side wall 100 is an integral part of the entire basement structure, bearing loads from the superstructure, soil pressure, and groundwater pressure, providing necessary structural support and stability to ensure the safety and normal use of the basement space. As a carrier of waterproofing details, the basement side wall 100 clearly defines the area requiring waterproofing measures, providing a basic framework for the subsequent arrangement of the upper and lower side wall waterproofing units 300 and the cantilever slab waterproofing unit 400.

[0034] The pre-reserved concrete protrusion 110 of the cantilever slab reinforcement is a structural part that protrudes from the outside of the basement side wall 100. The cantilever slab reinforcement is reserved inside it for subsequent reinforcement binding and concrete pouring of the cantilever slab. It is the structure that realizes the connection between the basement side wall 100 and the cantilever slab structure, ensuring the force transmission between the cantilever slab and the side wall and the integrity of the structure.

[0035] The pre-reserved concrete protrusion 110 of the cantilever slab reinforcement divides the basement side wall 100 into an upper half wall 120 and a lower half wall 130.

[0036] The upper wall waterproofing unit 200 is installed on the surface of the upper half wall 120. The main function of the upper wall waterproofing unit 200 is to provide waterproof protection for the upper half wall 120. It can effectively block the seepage of soil or groundwater from above into the upper half wall 120, prevent water from entering the interior of the upper half wall 120, and avoid problems such as concrete carbonization and steel corrosion caused by water erosion, thereby ensuring the structural safety and service life of the upper half wall 120.

[0037] The upper wall waterproofing unit 200 and the cantilever slab waterproofing unit 400 work together. The upper side of the cantilever slab waterproofing unit 400 extends between the upper wall waterproofing unit 200 and the surface of the upper half wall 120, so that the two form a tight connection and overlap, ensuring the waterproofing continuity of the connection between the upper half wall 120 and the cantilever slab, and preventing water from seeping into the basement from the connection.

[0038] The lower side wall waterproofing unit 300 is correspondingly installed on the surface of the lower half wall 130, and is responsible for waterproofing the lower half wall 130. Since the lower half wall 130 is closer to the groundwater level, it is subject to greater pressure from groundwater infiltration. The lower side wall waterproofing unit 300 can effectively resist the infiltration of groundwater, protect the lower half wall 130 from water erosion, and maintain the structural stability and durability of the lower half wall 130.

[0039] The design of the cantilever slab waterproof unit 400 extending into the lower side wall waterproof unit 300 and the surface of the lower half wall 130 ensures the waterproof integrity of the connection between the lower half wall 130 and the cantilever slab, preventing water from seeping into the basement from this part, and further enhancing the waterproof performance of the entire waterproof joint structure.

[0040] The waterproofing unit 400 is wrapped around the outside of the pre-reserved concrete protrusion 110 of the cantilever slab reinforcement. The waterproofing unit 400 directly provides waterproof protection for the construction joint of the cantilever slab in the basement side wall 100. As the connecting structure between the basement side wall 100 and the area without a basement, the cantilever slab is susceptible to erosion and damage from groundwater. The waterproofing unit 400 effectively prevents moisture from penetrating from the surface of the cantilever slab, protecting the internal reinforcement and concrete structure.

[0041] The cantilevered waterproof unit 400 extends towards the upper half wall 120 and the lower half wall 130 on its upper and lower sides, respectively, and extends into the space between the upper side wall waterproof unit 200 and the surface of the upper half wall 120, and between the lower side wall waterproof unit 300 and the surface of the lower half wall 130. This makes the cantilevered waterproof unit 400 a bridge connecting the upper and lower side wall waterproof units 300, linking the upper half wall 120, the lower half wall 130, and the pre-reserved concrete protrusion 110 of the cantilevered slab reinforcement into a unified waterproof system. This achieves the closure of the side wall waterproofing and effectively reduces the risk of leakage caused by gaps or loose connections between waterproof units.

[0042] This application utilizes a cantilever slab waterproofing unit 400 wrapped around the outer side of the pre-reserved concrete protrusion 110 of the cantilever slab reinforcement. The unit extends towards the upper half-wall 120 and lower half-wall 130 on both the upper and lower sides, respectively, and penetrates between the surfaces of the upper side wall waterproofing unit 200 and the upper half-wall 120, and between the lower side wall waterproofing unit 300 and the lower half-wall 130. This creates a tight connection and overlap between the cantilever slab waterproofing unit 400 and the upper and lower side wall waterproofing units 300, connecting the upper half-wall 120, lower half-wall 130, and the pre-reserved concrete protrusion 110 of the cantilever slab reinforcement into a unified waterproofing system. The entire side wall, from the upper half-wall 120 to the cantilever slab and then to the lower half-wall 130, is covered by the waterproofing unit, with no obvious waterproof gaps, thus achieving a closed waterproofing system for the side wall and effectively reducing the risk of leakage.

[0043] In some embodiments, the cantilever waterproofing unit 400 is a cement-based penetrating crystalline waterproofing material layer.

[0044] Understandably, cement-based penetrating crystalline waterproofing materials possess unique permeability, allowing them to penetrate deep into the capillary pores and micro-cracks of the concrete protrusions 110mm above the cantilever slab reinforcement. Inside the concrete, the active chemicals in the material react with cement hydration products to form water-insoluble crystals. These crystals fill the pores and cracks within the concrete, forming a dense waterproof barrier that effectively prevents groundwater infiltration, providing reliable waterproof protection for the cantilever slab.

[0045] Cement-based penetrating crystalline waterproofing material exhibits excellent adhesion to concrete, bonding tightly with the pre-reserved concrete protrusions 110 of the cantilever slab reinforcement to form a unified whole. This prevents voids and detachment between the waterproofing layer and the concrete, ensuring the stability and durability of the waterproofing layer. Even under pressure from groundwater, soil compression, and structural deformation, the waterproofing layer remains firmly attached to the concrete surface and will not easily peel off, thus guaranteeing the longevity of the waterproofing effect.

[0046] Optionally, the thickness of the cement-based penetrating crystalline waterproofing material layer is greater than or equal to 1 mm, and the unit area mass of the 1 mm thick cement-based penetrating crystalline waterproofing material layer is not less than 1.5 kg / m².

[0047] Understandably, a cement-based penetrating crystalline waterproofing material layer with a thickness of ≥1mm ensures that the material can fully cover the tiny cracks and pores on the concrete surface, forming a complete waterproof barrier. Sufficient thickness provides stronger waterproofing capabilities, especially under high water pressure or prolonged immersion. A thickness of 1mm effectively prevents water penetration and reduces the risk of leakage.

[0048] The requirement of a minimum mass per unit area of ​​1.5 kg / m² ensures the content of active chemical substances in the material layer. Active substances are crucial for the effectiveness of cement-based penetrating crystalline waterproofing materials. Sufficient active substance content guarantees that upon contact with concrete, enough substances participate in the chemical reaction to generate enough crystals to repair internal defects in the concrete and achieve a good waterproofing effect.

[0049] Reference Figure 1 According to the present invention, a waterproof structure 10 for a basement side wall cantilever slab is provided, wherein the upper side of the cantilever slab waterproof unit 400 extends into the area between the upper side wall waterproof unit 200 and the surface of the upper half wall 120 by a length greater than or equal to 250 mm.

[0050] Understandably, the overlap between the cantilevered waterproof unit 400 and the upper sidewall waterproof unit 200 is a crucial element in ensuring waterproof continuity. An extension length of 250mm or more ensures a sufficiently long overlap area. This effectively prevents moisture penetration from the overlap, as the longer overlap increases the path for moisture penetration, making it more difficult for moisture to breach the waterproof layer and thus improving the overall waterproof performance of the waterproof joint structure.

[0051] Reference Figure 1 According to the present invention, a waterproof structure 10 for a basement side wall cantilever slab is provided, wherein the lower side of the cantilever slab waterproof unit 400 extends into the area between the lower side wall waterproof unit 300 and the surface of the lower half wall 130 by a length greater than or equal to 250 mm.

[0052] Understandably, the lower side of the cantilever waterproof unit 400 extends at least 250mm into the area between the lower wall waterproof unit 300 and the surface of the lower half-wall 130, ensuring a sufficiently long overlap area between them. This sufficient overlap length ensures the continuity of the waterproof layer at the junction of the cantilever and the lower half-wall 130, reducing the risk of leakage due to interruptions or insufficient overlap in the waterproof layer.

[0053] Reference Figure 1 According to the present invention, a waterproof structure 10 for a basement side wall cantilever slab is provided, wherein the end of the overlap between the upper side wall waterproof unit 200 and the cantilever slab waterproof unit 400 is sealed with waterproof sealant 500.

[0054] It is understandable that there may be tiny gaps or unevenness at the end of the overlap between the upper side wall waterproof unit 200 and the cantilever slab waterproof unit 400. The waterproof sealant 500 has good flexibility and adhesion, which can fully fill these gaps and form a dense sealing layer, effectively preventing the infiltration of groundwater and improving the overall waterproof performance of the waterproof joint structure.

[0055] Reference Figure 1According to the present invention, a waterproof structure 10 for a basement side wall cantilever slab is provided, wherein the end of the overlap between the lower side wall waterproof unit 300 and the cantilever slab waterproof unit 400 is sealed with waterproof sealant 500.

[0056] Understandably, at the overlap between the lower side wall waterproofing unit 300 and the cantilever slab waterproofing unit 400, even if the waterproofing material itself has good waterproofing performance, there may still be tiny gaps or incomplete adhesion at the overlap. Using waterproof sealant 500 to seal the joint can effectively fill these tiny gaps, prevent moisture from seeping in from the overlap, and ensure the overall sealing of the waterproofing layer.

[0057] Reference Figure 1 According to the present invention, a waterproof structure 10 for a cantilevered basement side wall is provided. The upper side wall waterproof unit 200 or the lower side wall waterproof unit 300 includes a waterproof membrane layer 700 and a waterproof protective layer 800. The waterproof membrane layer 700 is attached to the surface of the upper half wall 120 or the lower half wall 130, and the waterproof protective layer 800 is located on the other side of the waterproof membrane layer 700 away from the upper half wall 120 or the lower half wall 130.

[0058] Understandably, the 700mm waterproof membrane layer is directly applied to the surface of the upper half of the wall (120mm) or the lower half of the wall (130mm) to prevent water penetration. It effectively prevents groundwater, moisture in the backfill soil, and moisture from the external environment from seeping into the wall structure.

[0059] The waterproof protective layer 800 is set on the side of the waterproof membrane layer 700 away from the wall, which can protect the waterproof membrane layer 700 and extend its service life.

[0060] Reference Figure 1 According to the present invention, a waterproof structure 10 for a cantilevered basement side wall is provided, wherein the ends of the waterproof membrane layer 700 at both ends are connected and fixed to the upper half wall 120 or the lower half wall 130 by connecting nails 600.

[0061] Understandably, securing the waterproof membrane layer 700 to the wall using connecting nails 600 ensures a tight fit between the membrane and the wall, reducing gaps caused by loosening or displacement of the membrane. This effectively prevents moisture from seeping through the gaps between the membrane and the wall, thereby improving the reliability of the waterproofing system.

[0062] In some embodiments, the upper sidewall waterproofing unit 200 or the lower sidewall waterproofing unit 300 further includes a waterproof coating layer, which is applied to the surface of the upper half wall 120 or the lower half wall 130.

[0063] Understandably, the waterproof coating layer and the waterproof membrane layer 700 together constitute a composite waterproofing system. The waterproof membrane layer 700 provides the main waterproof barrier, while the waterproof coating layer forms an additional waterproof membrane between the membrane layer and the concrete wall, further enhancing the waterproofing effect.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A waterproof structure for a cantilevered slab on a basement side wall, characterized in that, include: The basement side wall has a cantilevered slab steel reinforcement pre-reserved concrete protrusion on its outer side, which divides the basement side wall into an upper half wall and a lower half wall. Upper wall waterproofing unit, the upper wall waterproofing unit is correspondingly installed on the surface of the upper half wall; The lower side wall waterproofing unit is correspondingly installed on the surface of the lower half wall; A cantilevered waterproof unit is provided, which is wrapped around the outside of the pre-reserved concrete protrusion of the cantilevered slab reinforcement. The upper and lower sides of the cantilevered waterproof unit extend toward the upper half wall and the lower half wall respectively, and extend into the space between the upper side wall waterproof unit and the surface of the upper half wall, and between the lower side wall waterproof unit and the surface of the lower half wall respectively.

2. The waterproof structure for cantilevered slabs of basement side walls according to claim 1, characterized in that, The waterproof unit of the cantilever plate is a cement-based penetrating crystalline waterproof material layer.

3. The waterproof structure for the cantilevered slab of the basement side wall according to claim 2, characterized in that, The thickness of the cement-based penetrating crystalline waterproof material layer is greater than or equal to 1 mm, and the unit area mass of the 1 mm thick cement-based penetrating crystalline waterproof material layer is not less than 1.5 kg / m².

4. The waterproof structure for cantilevered slabs of basement side walls according to claim 1, characterized in that, The length of the upper side of the cantilever waterproof unit extending between the upper side wall waterproof unit and the surface of the upper half wall is greater than or equal to 250mm.

5. The waterproof structure for cantilevered slabs of basement side walls according to claim 1, characterized in that, The length of the lower side of the cantilever waterproof unit extending between the lower side wall waterproof unit and the surface of the lower half wall is greater than or equal to 250mm.

6. The waterproof structure for cantilevered slabs of basement side walls according to any one of claims 1-5, characterized in that, The ends of the joint between the upper side wall waterproof unit and the cantilever board waterproof unit are sealed with waterproof sealant.

7. The waterproof structure for cantilevered slabs of basement side walls according to any one of claims 1-5, characterized in that, The ends of the overlap between the lower side wall waterproofing unit and the cantilever slab waterproofing unit are sealed with waterproof sealant.

8. The waterproof structure for cantilevered slabs of basement side walls according to any one of claims 1-5, characterized in that, The upper wall waterproofing unit or the lower wall waterproofing unit includes a waterproof membrane layer and a waterproof protective layer. The waterproof membrane layer is attached to the surface of the upper half wall or the lower half wall, and the waterproof protective layer is located on the other side of the waterproof membrane layer away from the upper half wall or the lower half wall.

9. The waterproof structure for the cantilevered slab of the basement side wall according to claim 8, characterized in that, The ends of the waterproof membrane layer at both ends are connected and fixed to the upper or lower half of the wall by connecting nails.

10. The waterproof structure for cantilevered slabs of basement side walls according to claim 8, characterized in that, The upper wall waterproofing unit or the lower wall waterproofing unit further includes a waterproof coating layer, which is applied to the surface of the upper half wall or the lower half wall.

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