Basement post-cast strip waterproof structure

Abstract

The utility model relates to the technical field of building construction, in particular to a basement post-cast strip waterproof structure. Comprising a post-cast strip concrete body arranged in a post-cast strip preformed groove; the water stop steel plates are pre-buried in the pre-cast concrete bodies on the two sides of the post-cast strip preformed groove and penetrate through the pre-cast concrete bodies to be connected with the post-cast strip concrete bodies; the waterproof plate is arranged on the outer side of the pre-cast concrete body and matched with the pre-cast concrete body and the post-cast strip concrete body; the waterproof pavement is arranged on the outer side of the waterproof plate and is connected with the pre-cast concrete body; and the flexible waterproof layer is arranged between the waterproof plate and the pre-cast concrete body and between the waterproof plate and the post-cast strip concrete body. According to the basement post-cast strip waterproof structure, through triple protection mechanisms of rigid water stopping, flexible sealing and dynamic compensation, the post-cast strip preformed groove can be sealed, and the problems that a traditional post-cast strip is high in leakage rate and poor in structural deformation adapting capacity are effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a waterproof structure for post-pouring strips in basements. Background Technology

[0002] Post-cast strips, as an important technical measure for controlling structural deformation during building construction, are achieved by leaving a temporary gap of 800-1200mm in width in the base slab, side walls, or top slab (which is then sealed with shrinkage-compensating concrete after the main structure's settlement has stabilized or temperature deformation has eased). This allows for proactive deformation control through a "leave first, fill later" approach. Its core value lies in three aspects: first, releasing settlement differences and temperature shrinkage stresses through delayed pouring; second, restoring structural integrity using micro-expansion concrete, improving the basement's impermeability and seismic performance; and third, mitigating the risk of shrinkage cracking during continuous pouring of ultra-long structural concrete. During this process, the interface between the new and old concrete naturally becomes a weak point due to prolonged exposure time, groundwater pressure, and capillary action. Waterproofing design directly affects structural durability and functionality, requiring focused prevention of chain reactions such as steel corrosion and concrete carbonation.

[0003] Current conventional post-cast waterproofing mainly relies on the single rigid protection of waterstop steel plates and rubber waterstops. However, both have significant drawbacks: the welding failure rate of waterstop steel plates is >15%, and stress concentration at the folds easily leads to cracks; the hardness change rate of rubber waterstops after long-term immersion reaches 20%, and insufficient vulcanization at the joints results in a peel strength of <4kN / m; more importantly, this single-layer protection system lacks multi-layer redundancy—it lacks both a dynamic compensation system for grouting pipes and the synergistic effect of flexible sealing and rigid waterstops. Once a local failure occurs, groundwater can directly seep through along the interface. Coupled with process defects such as improper roughening and insufficient compaction during construction, the entire waterproofing system will eventually collapse, leading to engineering problems.

[0004] Based on this, the present invention proposes a waterproof structure for post-pouring strips in basements to solve the problems existing in the prior art and improve the waterproof efficiency of post-pouring strips. Utility Model Content

[0005] In view of this, the main purpose of this utility model is to provide a waterproof structure for post-pouring strips in basements, so as to solve the problem that the single-layer protection system of traditional post-pouring strip waterproof structures in basements lacks multiple layers of protection and is prone to overall collapse of the waterproof system.

[0006] To achieve the above objectives, the basic concept of the technical solution adopted by this utility model is as follows:

[0007] A waterproofing structure for post-cast strips in basements includes:

[0008] The post-cast strip concrete is set in the pre-reserved groove of the post-cast strip of the pre-cast concrete;

[0009] The water-stop steel plate is embedded in the pre-cast concrete on both sides of the reserved groove of the post-cast strip, and it penetrates the pre-cast concrete and connects with the post-cast strip concrete.

[0010] The waterproof membrane is installed on the outside of the pre-cast concrete and is compatible with both the pre-cast concrete and the post-cast concrete strip.

[0011] Waterproofing lining is installed on the outside of the waterproofing liner and connected to the pre-poured concrete.

[0012] A flexible waterproof layer is placed between the waterproof membrane and the pre-cast concrete and the post-cast concrete strip.

[0013] In a preferred embodiment, the waterproofing membrane is a precast concrete slab, and the width of the waterproofing membrane is greater than the length of the post-cast concrete strip.

[0014] In a preferred embodiment, both ends of the waterproof membrane are provided with transition zones that connect to the pre-cast concrete body.

[0015] In a preferred embodiment, the flexible waterproof layer comprises, from the outside to the inside, a water-swellable waterproof strip, a waterproof membrane isolation strip, and a rubber waterproof strip.

[0016] In a preferred embodiment, the water-swellable waterproofing strip and the waterproof membrane isolation strip are both adhered between the waterproof membrane and the pre-cast concrete body. The rubber waterproofing strip is adhered to the outside of the post-cast concrete body and the joint between the pre-cast concrete body and the post-cast concrete body, and is connected to the waterproof membrane.

[0017] In a preferred embodiment, the water-swellable waterproofing strip and the waterproof membrane isolation strip, as well as the waterproof membrane isolation strip and the rubber waterproofing strip, are all overlapped and connected, and the overlaps are heat-fused and welded.

[0018] In a preferred embodiment, a V-shaped groove is reserved on the side wall of the reserved groove for the post-cast strip of the pre-cast concrete body, and the V-shaped groove is engaged with the V-shaped protrusion at the end of the concrete body of the cast strip.

[0019] In a preferred embodiment, a self-healing barrier is also provided between the V-shaped groove and the concrete body of the pouring strip.

[0020] In a preferred embodiment, the precast main reinforcement of the precast concrete body and the postcast main reinforcement of the postcast strip concrete body are connected by threaded sleeves.

[0021] In a preferred embodiment, the waterstop steel plate is a galvanized steel plate with folded edges, and the two folded edges of the waterstop steel plate are located in the pre-cast concrete body and the post-cast strip concrete body, respectively.

[0022] Compared with the prior art, this utility model provides a waterproof structure for post-pouring strips in basements, which has the following beneficial effects:

[0023] 1. By setting up waterproof paving and waterproof boards, the first layer of protection at the connection of the post-pouring strip can be formed, protecting the joint between the pre-pouring concrete and the post-pouring strip concrete.

[0024] 2. By setting up a flexible waterproof layer, a second layer of protection can be formed, sealing and waterproofing the connection between the waterproof membrane and the pre-cast concrete and the post-cast concrete strip, while preventing external water from entering the connection joint between the pre-cast concrete and the post-cast concrete strip.

[0025] 3. By setting up a water-stop steel plate and a self-healing barrier in the joint between the pre-cast concrete and the post-cast concrete, the concrete of the post-cast strip can dynamically repair and compensate for the joint when it sets, shrinks, or expands, thus ensuring the waterproof effect of the joint.

[0026] 4. The waterproof structure of the post-cast strip in this basement uses a triple protection mechanism of rigid water stop, flexible sealing and dynamic compensation to seal the reserved groove of the post-cast strip, effectively solving the problems of high leakage rate and poor adaptability to structural deformation of traditional post-cast strips. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a structural schematic diagram of the waterproof structure of the post-cast strip in the basement according to this utility model;

[0029] Figure 2 This utility model Figure 1 A magnified view of a section at point A in the middle;

[0030] Figure 3 This utility model Figure 1 A magnified view of a section at point B in the middle;

[0031] Figure 4 This is a schematic diagram of the structure of the threaded sleeve of this utility model.

[0032] [Explanation of Key Component Symbols]

[0033] 1. First-pour concrete body; 2. Second-pour concrete body; 3. Water-stop steel plate; 4. Waterproofing layer; 5. Flexible waterproofing layer; 6. Waterproofing membrane; 7. Stirrups; 8. First-pour main reinforcement; 9. Second-pour main reinforcement; 10. Threaded sleeve; 11. Water-swellable waterstop; 12. Waterproof membrane isolation strip; 13. Rubber waterstop; 14. V-groove; 15. Self-healing barrier; 16. Transition zone. Detailed Implementation

[0034] The structure of the waterproofing structure of the post-pouring strip in the basement will be further described in detail below with reference to the accompanying drawings and embodiments of the present invention.

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments as described in this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0037] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0038] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 9 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0039] The following is combined Figures 1 to 4 This invention describes the structure of the waterproof construction of the post-pouring strip in the basement.

[0040] A waterproof structure for a basement post-cast strip, which is poured into the post-cast strip, includes a post-cast strip concrete body 2, a waterstop steel plate 3, a waterproof layer 4, a flexible waterproof layer 5, and a waterproof board 6.

[0041] The post-cast strip concrete 2 is poured into the post-cast strip reserved groove of the pre-cast concrete 1.

[0042] The water-stop steel plate 3 is embedded in the pre-cast concrete body 1 on both sides of the reserved groove of the post-cast strip, and it penetrates the pre-cast concrete body 1 and connects with the post-cast strip concrete body 2.

[0043] The waterproof membrane 6 is installed on the outside of the pre-cast concrete body 1 and is matched with both the pre-cast concrete body 1 and the post-cast concrete strip 2, and protects the connection joint between the pre-cast concrete body 1 and the post-cast concrete strip 2 outdoors.

[0044] The waterproofing lining 4 is installed on the outside of the waterproofing liner 6 and is connected to the pre-cast concrete body 1 to fix the waterproofing liner 6.

[0045] The flexible waterproof layer 5 is disposed between the waterproof liner 6 and the pre-cast concrete body 1 and the post-cast concrete strip 2, and serves the purpose of dynamic waterproofing.

[0046] In the above description, the waterproof layer 4, in conjunction with the waterproof membrane 6, forms the first layer of protection at the connection of the post-cast strip, protecting the joint between the pre-cast concrete 1 and the post-cast strip concrete 2. The flexible waterproof layer 5 forms the second layer of protection, sealing the joint between the waterproof membrane 6 and the pre-cast concrete 1 and post-cast strip concrete 2, while preventing external water from entering the joint. The water-stop steel plate 3 and the repair barrier within the joint between the pre-cast concrete 1 and post-cast strip concrete 2 form the third layer of protection, used to waterproof the joint after the post-cast strip concrete 2 shrinks. This triple protection mechanism of rigid water-stopping, flexible sealing, and dynamic compensation addresses the problem of single-layer waterproofing systems in basement post-cast strip structures lacking multiple layers of protection, which can easily lead to the overall collapse of the waterproofing system.

[0047] In a preferred embodiment, such as Figure 1 , Figure 2 and Figure 3 As shown, the waterproofing membrane 6 is a precast concrete slab, and the width of the waterproofing membrane 6 is greater than the length of the post-cast concrete body 2; this allows the waterproofing membrane 6 to cover the joints at both ends of the post-cast concrete body 2 after installation, so as to ensure the protective effect of the waterproofing membrane 6 on the joints.

[0048] In the above description, by using the waterproofing liner 4 to fix the waterproofing membrane 6 to the outside of the pre-cast concrete body 1 and the post-cast concrete strip 2, compared with the traditional hole-opening fixation, this fixing method can avoid opening holes in the waterproofing membrane 6, ensuring the integrity of the waterproofing membrane 6, thereby ensuring the seepage prevention and waterproofing function of the waterproofing membrane 6, so that the water on the outside of the waterproofing membrane 6 will not invade the joint position from the structure of the waterproofing membrane 6.

[0049] In a preferred embodiment, such as Figure 1 , Figure 2 and Figure 3 As shown, transition zones 16 are provided at both ends of the waterproof membrane 6 to connect with the pre-cast concrete body 1. The transition zone 16 is a triangular transition zone formed by plain concrete filling. By setting the transition zone 16, the waterproof membrane 4 can have a smooth transition while also having a waterproof function, avoiding stress concentration at both ends of the waterproof membrane 6 and affecting the fixing effect of the waterproof membrane 6.

[0050] In a preferred embodiment, such as Figure 1 , Figure 2 and Figure 3As shown, the flexible waterproof layer 5 includes, from the outside to the inside, a water-swellable waterstop 11, a waterproof membrane isolation strip 12, and a rubber waterstop 13. The water-swellable waterstop 11 and the waterproof membrane isolation strip 12 are both adhered between the waterproof membrane 6 and the pre-cast concrete body 1. The rubber waterstop 13 is adhered to the outside of the post-cast concrete body 2 and the connection joint between the pre-cast concrete body 1 and the post-cast concrete body 2, and is connected to the waterproof membrane 6.

[0051] In the above description, the water-swellable waterstop 11 and the waterproof membrane isolation strip 12, and the waterproof membrane isolation strip 12 and the rubber waterstop 13 are all overlapped and connected, and the overlap is welded by hot melting to form a three-level flexible seepage prevention structure, which seals the connection between the waterproof membrane 6 and the pre-cast concrete body 1 and the post-cast concrete body 2 to prevent external water from seeping into the connection joint during use.

[0052] It should be noted that the water-swellable waterstop 11 is formed by connecting several water-swellable waterstop strips, the waterproof membrane isolation strip 12 is formed by connecting several waterproof membranes, and the rubber waterstop 13 is formed by connecting several rubber waterstop strips; and the water-swellable waterstop strips, waterproof membranes, and rubber waterstop strips are all waterstop structures known to those skilled in the art, and the model can be selected according to the specific working conditions during construction, which will not be elaborated here.

[0053] In a preferred embodiment, such as Figure 1 , Figure 2 and Figure 3 As shown, a V-shaped groove 14 is reserved on the side wall of the reserved groove for the post-pouring strip of the pre-cast concrete body 1. This groove 14 is used to ensure the connection stability between the pre-cast concrete body 1 and the post-pouring strip concrete body 2 after the post-pouring strip concrete body 2 is poured, through the interlocking action of the V-shaped groove 14 and the V-shaped protrusion at the end of the post-pouring strip concrete body 2.

[0054] Specifically, such as Figure 1 , Figure 2 and Figure 3 As shown, the plane where the V-shaped groove 14 is located is also sprayed with a penetrating crystalline waterproof coating, which is used to form a self-healing barrier 15 through deep penetration after the concrete of the post-cast strip concrete body 2 is poured, so as to ensure that the post-cast strip concrete body 2 can dynamically repair and compensate the joint when the concrete shrinks or expands during setting, so as to ensure the waterproof effect of the joint.

[0055] It should be noted that the penetrating crystalline waterproof coating (Crystal infiltration activity of parent material) is an existing technology. It is an active substance with an active silicon molecular structure, a small molecular weight, and contains both hydrophobic and hydrophilic groups. Its hydrophilicity is greater than its hydrophobicity, and it is soluble in water. It does not undergo condensation crystallization in a dry environment, but it does in a humid environment. It is composed of active silicon, cement, and active inorganic mixtures, etc. Its specific principles and functions will not be elaborated in detail in this solution.

[0056] In a preferred embodiment, such as Figure 1 , Figure 2 and Figure 3 As shown, the pre-cast main reinforcement 8 of the pre-cast concrete body 1 and the post-cast main reinforcement 9 of the post-cast concrete body 2 are connected by a threaded sleeve 10. By using the threaded sleeve 10 to apply prestress to the pre-cast main reinforcement 8 and the post-cast main reinforcement 9, the tensile stress of the pre-cast main reinforcement 8 in the pre-cast concrete body 1 is the same as that of the post-cast main reinforcement 9 in the post-cast concrete body 2, so as to achieve stress transition and avoid stress loss in the pre-cast groove of the post-cast concrete body 2 after pouring, which would affect the structural safety.

[0057] In a preferred embodiment, such as Figure 1 , Figure 2 and Figure 3 As shown, the waterstop steel plate 3 is a galvanized steel plate with folded edges, and the two folded edges of the waterstop steel plate 3 are located in the pre-cast concrete body 1 and the post-cast concrete strip 2, respectively. By setting the folded edge structure, the binding effect of the waterstop steel plate 3 on the pre-cast concrete body 1 and the post-cast concrete strip 2 after the pouring is completed can be enhanced.

[0058] The construction process of the waterproof structure for the post-cast strip in the basement described in this utility model includes:

[0059] First, before constructing the post-cast strip concrete 2, the sidewall of the pre-reserved V-shaped groove 14 on the side wall of the post-cast strip pre-reserved groove is roughened. Simultaneously, a threaded sleeve 10 is used to connect the pre-cast main reinforcement 8 of the first-cast concrete 1 to the post-cast main reinforcement 9 of the post-cast strip concrete 2. Based on the tensile test results, the threaded sleeve 10 is adjusted to apply prestress to the post-cast main reinforcement 9. After the prestress reaches the design standard, a penetrating crystalline waterproof coating is sprayed onto the plane containing the V-shaped groove 14 before pouring the post-cast strip concrete 2. Second, the post-cast strip concrete 2 is poured... After the concrete of the post-cast strip 2 is poured and the concrete has solidified, a self-healing barrier 15 is formed at the joint. Then, a flexible waterproof layer 5 is constructed on the outer surface where the pre-cast concrete 1 and the post-cast strip concrete 2 are connected. The waterproof membrane 6 is immediately installed after the overlap of the water-swellable waterstop 11 and the waterproof membrane isolation strip 12, and the waterproof membrane isolation strip 12 and the rubber waterstop 13 are welded by hot melting. The waterproof membrane 6 is then fixed and the transition zone 16 is poured using the waterproof membrane 4 to complete the construction of the waterproof structure of the post-cast strip in the basement.

[0060] The waterproofing structure of the post-cast strip in this basement effectively solves the problems of high leakage rate and poor adaptability to structural deformation of traditional post-cast strips through a triple protection mechanism of rigid water stop, flexible sealing and dynamic compensation.

[0061] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A waterproof structure for post-cast strips in basements, characterized in that: include: The post-cast strip concrete body (2) is set in the post-cast strip reserved groove of the pre-cast concrete body (1); Water-stop steel plate (3) is embedded in the pre-cast concrete body (1) on both sides of the reserved groove of the post-cast strip, and it penetrates the pre-cast concrete body (1) and connects with the post-cast strip concrete body (2). Waterproof membrane (6) is set on the outside of the pre-cast concrete body (1) and is compatible with both the pre-cast concrete body (1) and the post-cast concrete body (2); Waterproofing paving (4) is placed on the outside of waterproofing board (6) and connected to the pre-cast concrete body (1); A flexible waterproof layer (5) is placed between the waterproof membrane (6) and the pre-cast concrete body (1) and the post-cast concrete body (2).

2. The waterproof structure for post-cast strips in basements as described in claim 1, characterized in that: The waterproofing slab (6) is a precast concrete slab, and the width of the waterproofing slab (6) is greater than the length of the post-cast concrete body (2).

3. The waterproof structure for post-cast strips in basements as described in claim 1, characterized in that: Both ends of the waterproof membrane (6) are provided with transition zones (16) that connect to the pre-cast concrete body (1).

4. The waterproof structure for post-cast strips in basements as described in claim 1, characterized in that: The flexible waterproof layer (5) includes, from the outside to the inside, a water-swellable waterstop (11), a waterproof membrane isolation strip (12), and a rubber waterstop (13).

5. A waterproof structure for a basement post-pouring strip as described in claim 4, characterized in that: The water-swellable waterstop (11) and the waterproof membrane isolation strip (12) are both bonded between the waterproof membrane (6) and the pre-cast concrete body (1). The rubber waterstop (13) is bonded to the outside of the joint between the post-cast concrete body (2) and the connection between the pre-cast concrete body (1) and the post-cast concrete body (2), and is connected to the waterproof membrane (6).

6. The waterproof structure for post-cast strips in basements as described in claim 4, characterized in that: The water-swellable waterstop (11) and the waterproof membrane isolation strip (12), and the waterproof membrane isolation strip (12) and the rubber waterstop (13) are all overlapped and connected, and the overlap is hot-melt welded.

7. The waterproof structure for post-cast strips in basements as described in claim 1, characterized in that: A V-shaped groove (14) is reserved on the side wall of the reserved groove of the post-cast strip of the pre-cast concrete body (1), and the V-shaped groove (14) is engaged with the V-shaped protrusion at the end of the cast strip concrete body (2).

8. A waterproof structure for a basement post-pouring strip as described in claim 7, characterized in that: A self-healing barrier (15) is also provided between the V-shaped groove (14) and the concrete body (2) of the pouring strip.

9. A waterproof structure for post-cast strips in basements as described in claim 1, characterized in that: The precast main reinforcement (8) of the precast concrete body (1) and the postcast main reinforcement (9) of the postcast concrete body (2) are connected by a threaded sleeve (10).

10. A waterproof structure for post-cast strips in basements as described in claim 1, characterized in that: The waterstop steel plate (3) is a galvanized steel plate with folded edges, and the two folded edges of the waterstop steel plate (3) are located in the pre-cast concrete body (1) and the post-cast concrete body (2), respectively.

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