Basement post-cast strip anti-seepage structure

Abstract

The utility model discloses a basement post-cast strip anti -infiltration structure relates to building engineering technical field, including installation base layer, and the waterproof coiled material layer is fixedly connected on installation base layer, and the water-swelling cotton layer is fixedly connected on waterproof coiled material layer, and the water-swelling bin is fixedly connected on water-swelling cotton layer, and the waterproof steel sheet is fixedly connected on water-swelling bin, in the utility model, adopt multilayer composite design, including installation base layer, waterproof coiled material layer, water-swelling cotton layer, water-swelling bin and waterproof steel sheet etc, compare with the single waterstop of traditional straight plate waterstop material, and this multilayer structure forms the waterproof barrier of mutual coordination of multichannel, and every layer is designed to different water seepage condition and water seepage path, and the overall waterproof performance has been greatly improved, even if partial water seepage appears in certain layer, and the subsequent level can still effectively prevent the further penetration of water, and the problem that traditional straight plate waterstop material only relies on single plane waterstop is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, specifically to a basement post-cast strip seepage prevention structure. Background Technology

[0002] A post-cast strip is a temporary construction joint left at a corresponding location in the foundation slab, wall, or beam during building construction to prevent harmful cracks that may occur in cast-in-place reinforced concrete structures due to uneven temperature and shrinkage, as required by design or construction specifications. It is formed after a period of time following the completion of the concrete pouring on both sides, using concrete of a higher strength grade than the concrete on the sides.

[0003] When a basement is located below the water table, the groundwater exerts hydrostatic pressure on the basement structure. This pressure is due to the weight and incompressibility of water. To illustrate, imagine a container filled with water; the pressure at the bottom increases with depth. In a basement environment, the difference in water column height between the water table and the basement floor slab creates upward water pressure on the grouting strip.

[0004] Traditional straight-plate waterstop materials, such as straight-plate waterstop steel plates or simple waterstop strips, have a relatively flat contact surface with the concrete. When subjected to vertically upward water pressure, water can penetrate relatively directly along this plane. From a microscopic perspective, the concrete itself has tiny pores, and it is difficult to achieve a completely seamless bond between the straight-plate waterstop material and the concrete. Under pressure, water will gradually penetrate through these pores and gaps. Utility Model Content

[0005] The purpose of this utility model is to provide a basement post-pouring strip seepage prevention structure, including an installation base layer, a waterproof membrane layer fixedly connected to the installation base layer, a water-swellable cotton layer fixedly connected to the waterproof membrane layer, a water-swellable chamber fixedly connected to the water-swellable cotton layer, and a waterproof steel plate fixedly connected to the water-swellable chamber.

[0006] In one preferred embodiment, a connecting plate is fixedly connected to the water-swellable cotton layer.

[0007] The above technical solution involves installing connecting plates on the water-swellable cotton layer, which increases the connection area between the water layer and the waterproof steel plate during use. This allows the water to travel a longer distance in case of seepage, thus better preventing seepage.

[0008] In a preferred embodiment, the water-swellable chamber is fixedly connected to the outer wall of the water-swellable cotton layer.

[0009] The above technical solution is adopted: the water-swellable chamber is fixed on the outer wall of the water-swellable cotton, which increases the area of ​​the water-swellable cotton around the perimeter and improves the side waterproofing capability of the overall post-pouring strip.

[0010] In a preferred embodiment, the outer wall of the waterproof steel plate is slidably connected to the water-expanding chamber.

[0011] The above technical solution involves wrapping the sides of the waterproof steel plate with water-swellable cotton to further enhance the waterproof performance of the water-swellable chamber.

[0012] In a preferred embodiment, the waterproof steel plate has a U-shaped groove.

[0013] Using the above technical solution: U-shaped water-stop steel plates have a better water-stopping effect than straight plates. This shape can extend the seepage path of groundwater. When water comes into contact with the water-stop steel plate from the water-facing side, it must flow along the bent part of the steel plate, instead of passing directly through as with straight plates. For U-shaped steel plates, water has to bypass the two sides and the bottom, which greatly increases the resistance to seepage.

[0014] In a preferred embodiment, a waterproof layer is provided on the mounting base.

[0015] The above technical solution involves setting an additional waterproof layer after the concrete is poured. Polyurethane waterproof coating can be used, and the coating can be evenly applied to the concrete surface with a brush or roller. The additional waterproof layer improves the impermeability of the pouring strip.

[0016] In a preferred embodiment, the bottom surface of the waterproof steel plate is provided with a groove, and the connecting plate is fixedly connected to the groove at the bottom of the waterproof steel plate.

[0017] By adopting the above technical solution: when the structure is put into use, the connecting plate can effectively increase the connection area between the water-swellable cotton layer and the waterproof steel plate. Once water seepage occurs, the water's path will be greatly extended when it tries to pass through this waterproof structure. The water will need to meander through more obstacles and a longer path, thereby greatly improving the ability to block water seepage and better ensuring the waterproof effect of the entire waterproof structure, ensuring that the basement post-pouring strip is not troubled by water seepage problems.

[0018] In a preferred embodiment, the waterproof membrane layer has a groove, and a waterstop strip is fixedly connected to the groove.

[0019] The above technical solution is adopted after the waterstop steel plate is installed and the concrete surface is dry. It is necessary to reserve a groove on the concrete surface, the size of which is slightly larger than that of the waterstop strip. The waterstop strip is embedded in the groove and firmly attached with a special adhesive to ensure that there are no air bubbles or wrinkles. Alternatively, the waterstop strip can be replaced with waterstop adhesive, which is applied directly to the concrete surface and spread evenly.

[0020] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0021] This invention employs a multi-layered composite design, including an installation base layer, a waterproof membrane layer, a water-swellable cotton layer, a water-swellable chamber, and a waterproof steel plate. Compared to the single water-stopping line of traditional straight-plate water-stopping materials, this multi-layered structure forms multiple synergistic waterproof barriers. Each layer is designed for different seepage conditions and seepage paths, greatly improving the overall waterproof performance. Even if local seepage occurs in a certain layer, subsequent layers can still effectively prevent further water penetration, effectively solving the problem that traditional straight-plate water-stopping materials, relying solely on a single planar water-stopping surface, are easily breached. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a post-cast strip waterproofing structure for basements.

[0023] Figure 2 This is a schematic diagram showing the location of the waterproof steel plate in a basement post-cast strip seepage prevention structure.

[0024] Figure 3 This is a schematic diagram of the disassembled state of a basement post-cast strip seepage prevention structure device.

[0025] Figure 4 This is a schematic diagram of the cross-sectional state of a post-cast strip waterproofing structure for a basement.

[0026] Numbering on the map:

[0027] 1. Base layer; 2. Waterproof membrane layer; 3. Water-swellable cotton layer; 31. Water-swellable compartment; 32. Connecting insert plate; 4. Waterproof steel plate. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1

[0030] A basement post-pouring strip seepage prevention structure includes an installation base layer 1, a waterproof membrane layer 2 fixedly connected to the installation base layer 1, a water-swellable cotton layer 3 fixedly connected to the waterproof membrane layer 2, a water-swellable chamber 31 fixedly connected to the water-swellable cotton layer 3, and a waterproof steel plate 4 fixedly connected to the water-swellable chamber 31.

[0031] In practical application of this utility model, the first step is to treat the base layer 1 to ensure it has sufficient strength and stability. The surface of the base layer is cleaned and repaired to make it flat, creating favorable conditions for subsequent construction. Then, a waterproof layer is set on the base layer 1, such as using polyurethane waterproof coating. The coating is evenly applied, and the film-forming substances in it cross-link with each other during the drying or curing process to form a continuous and dense protective film. Through chemical bonding or physical adsorption, it is tightly bonded to the base layer, becoming the first line of defense against groundwater infiltration.

[0032] Next is the laying of the second layer of waterproof membrane. If SBS modified bitumen waterproof membrane is used, first unfold the membrane, heat the bottom surface of the membrane and the surface of the base layer with a spray gun, and when the bottom surface of the membrane is in a molten state, immediately roll and stick the membrane forward. Alternatively, for polymer waterproof membrane, use the cold bonding method and use a special adhesive to stick the membrane to the base layer. The overlap between the membranes must meet the requirements to form a continuous waterproof layer. This is the second line of waterproof defense.

[0033] Next, a water-swellable cotton layer 3 is installed on the waterproof membrane layer 2. In a dry state, it fills the corresponding spaces. When a small amount of water permeates through the waterproof membrane layer 2, the water-absorbing and swelling material inside (such as a hydrophilic polymer) absorbs water and expands in volume, blocking further water penetration. A water-swellable chamber 31 is fixed to the outer wall of the water-swellable cotton layer 3, providing space and some restriction for the expansion of the water-swellable cotton. The two work together to enhance the waterproofing effect.

[0034] Next, the waterproof steel plate 4 is installed on the water-expanding chamber 31. The waterproof steel plate 4 is made of ordinary carbon steel or galvanized steel plate, with a thickness of 3-4mm and a width of 300-500mm. It is U-shaped and is placed vertically in the middle of both sides of the post-pouring strip. Its special U-shaped structure and sliding connection with the water-expanding chamber 31 make water flow along a tortuous path when it comes into contact with the waterproof steel plate 4, increasing the seepage resistance. The U-shaped groove design on the steel plate further improves the water-stopping effect.

[0035] Finally, the connecting plate 32 is installed. It is fixed to the water-swellable cotton layer 3 and connected to the groove at the bottom of the waterproof steel plate 4. This increases the connection area between the water-swellable cotton layer 3 and the waterproof steel plate 4, making the two more tightly bonded. At the same time, it prolongs the water's journey during seepage, increasing the difficulty of water penetration. This better ensures that seepage is blocked outside the seepage prevention structure. Through these steps and the synergistic effect of each part, the entire seepage prevention structure forms a multi-layered waterproof barrier, effectively preventing groundwater from seeping into the basement's post-construction strip.

[0036] Example 2

[0037] A connecting plate 32 is fixedly connected to the water-swellable cotton layer 3. By setting the connecting plate 32 on the water-swellable cotton layer 3, the connection area between the water layer and the waterproof steel plate 4 can be increased during use, so that the water travels a longer distance in the event of seepage, and the seepage is better blocked.

[0038] The water-swellable chamber 31 is fixedly connected to the outer wall of the water-swellable cotton layer 3. The water-swellable chamber 31 is fixed to the outer wall of the water-swellable cotton, which expands the area of ​​the water-swellable cotton around the perimeter and improves the side waterproofing capability of the overall post-pouring strip.

[0039] The outer wall of the waterproof steel plate 4 is slidably connected to the water-swellable chamber 31, and the side of the waterproof steel plate 4 is wrapped with water-swellable cotton to further enhance the waterproof performance of the water-swellable chamber 31.

[0040] The waterproof steel plate 4 has a U-shaped groove. The U-shaped water-stop steel plate has a better water-stopping effect than the straight plate type. This shape can extend the seepage path of groundwater. When water comes into contact with the water-stop steel plate from the water-facing side, it must flow along the curved part of the steel plate, instead of passing directly through as with the straight plate type. For the U-shaped steel plate, water has to bypass the two sides and the bottom, which greatly increases the resistance to seepage.

[0041] A waterproof layer is installed on the base layer 1. An additional waterproof layer is installed after the concrete is poured. Polyurethane waterproof coating can be used. The coating is evenly applied to the concrete surface with a brush or roller. The additional waterproof layer improves the anti-seepage ability of the pouring strip.

[0042] The bottom surface of the waterproof steel plate 4 is provided with a groove, and the connecting plate 32 is fixedly connected to the groove at the bottom of the waterproof steel plate 4. When the structure is put into use, the connecting plate 32 can effectively increase the connection area between the water-swellable cotton layer 3 and the waterproof steel plate 4. Once water seepage occurs, the water's path will be greatly extended when it tries to pass through this waterproof structure. The water needs to detour through more obstacles and a longer path, which greatly improves the ability to block water seepage and better protects the waterproof effect of the entire waterproof structure, ensuring that the basement post-pouring strip is free from water seepage problems.

[0043] A groove is provided on the waterproof membrane layer 2, and a waterstop strip is fixedly connected in the groove on the waterproof membrane layer 2. This is done after the waterstop steel plate is installed and the concrete surface is dry. It is necessary to leave a groove on the concrete surface with a size larger than the waterstop strip. The waterstop strip is then embedded in the groove and firmly attached with a special adhesive, ensuring that there are no air bubbles or wrinkles. Alternatively, the waterstop strip can be replaced with waterstop adhesive, which is applied directly to the concrete surface and spread evenly.

[0044] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A waterproofing structure for post-cast strips in basements, characterized in that, It includes an installation base layer (1), on which a waterproof membrane layer (2) is fixedly connected, on which a water-swellable cotton layer (3) is fixedly connected, on which a water-swellable chamber (31) is fixedly connected, and on which a waterproof steel plate (4) is fixedly connected.

2. The basement post-cast strip seepage prevention structure according to claim 1, characterized in that: A connecting plate (32) is fixedly connected to the water-swellable cotton layer (3).

3. The basement post-cast strip seepage prevention structure according to claim 2, characterized in that: The water-swellable chamber (31) is fixedly connected to the outer wall of the water-swellable cotton layer (3).

4. The basement post-cast strip seepage prevention structure according to claim 1, characterized in that: The outer wall of the waterproof steel plate (4) is slidably connected to the water-expandable chamber (31).

5. A basement post-cast strip seepage prevention structure according to claim 4, characterized in that: The waterproof steel plate (4) has a U-shaped groove.

6. A basement post-cast strip seepage prevention structure according to claim 1, characterized in that: A waterproof layer is provided on the mounting base (1).

7. A basement post-cast strip seepage prevention structure according to claim 2, characterized in that: The bottom surface of the waterproof steel plate (4) is provided with a groove, and the connecting plate (32) is fixedly connected in the groove at the bottom of the waterproof steel plate (4).

8. A basement post-cast strip seepage prevention structure according to claim 1, characterized in that: The waterproof membrane layer (2) has a groove, and a water-stop strip is fixedly connected in the groove of the waterproof membrane layer (2).

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