Bottom plate post-cast strip advance water stop structure and construction method thereof

Abstract

The invention relates to the technical field of building construction, and discloses a bottom plate post-cast strip advance water stop structure and a construction method thereof. The concrete bottom plate is fixedly arranged on the foundation bottom plate; the deformation joint is arranged in the concrete bottom plate, and tooth grooves are formed in the two sides of the deformation joint; the water stop belt is arranged in the deformation joint; wherein the water stop belt comprises an externally-attached type water stop belt and a middle-buried type water stop belt, the externally-attached type water stop belt is arranged at the bottom of the deformation joint, and the middle-buried type water stop belt is arranged in the middle of the deformation joint; the foundation bottom plate and the concrete bottom plate are poured at a time. The advanced water stop structure of the bottom plate post-cast strip is simple in structure, convenient to construct and reasonable in design, the foundation bottom plate and the concrete bottom plate are poured at a time, the foundation bottom plate, the concrete bottom plate and the deformation joint form a whole, the integrity is enhanced, and then the waterproof effect of the advanced water stop structure of the bottom plate post-cast strip is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a base plate post-cast strip advance water-stopping structure and a construction method thereof. Background Art

[0002] With the development of infrastructure construction, there are more and more high-rise and super-high-rise building projects. In order to prevent harmful cracks that may be caused by uneven shrinkage or settlement of reinforced concrete structures, post-cast joints are left at the corresponding positions of the foundation slab, wall and beam in accordance with the design or construction specifications.

[0003] The traditional advanced water-stop post-casting strip has the following problems:

[0004] 1. Expansion joints rely on rubber waterstops and asphalt sealing, which are prone to aging and cracking, resulting in poor long-term waterproofing. Construction requires pouring in stages, resulting in a high risk of cold joints and insufficient integrity.

[0005] 2. Lack of self-repair ability, high repair cost after leakage.

[0006] Although there are some improvement schemes in the prior art, there are still problems such as leakage during construction and the waterproof effect cannot achieve the expected effect.

[0007] Therefore, there is an urgent need for a base plate post-casting strip advance water-stopping structure and a construction method thereof that has good waterproofing effect, simple construction, and self-repairing ability. Summary of the Invention

[0008] The present invention is made to solve the above technical problems, and its purpose is to provide an advanced water-stopping structure for a base plate post-cast strip and a construction method thereof.

[0009] In one aspect, the present invention provides an advance water-stop structure for a post-cast strip of a base plate, comprising: a foundation base plate; a concrete base plate fixedly arranged on the foundation base plate; a deformation joint arranged in the concrete base plate, with grooves provided on both sides of the deformation joint; a waterstop arranged in the deformation joint; wherein the waterstop comprises an external waterstop and an embedded waterstop, the external waterstop being arranged at the bottom of the deformation joint, and the embedded waterstop being arranged in the middle of the deformation joint; the foundation base plate and the concrete base plate are cast at one time.

[0010] As an embodiment, the thickness of the concrete base plate is 300mm-400mm.

[0011] As an embodiment, the spacing between the deformation joints is 30mm-50mm.

[0012] As an embodiment, a hydrophobic coating is provided on the water-facing surface of the deformation joint, and the thickness of the hydrophobic coating is 0.5mm-1mm; and a waterproof coating is provided on the top of the deformation joint.

[0013] As an embodiment, it further includes: a sealing glue, which is arranged between the external waterstop and the embedded waterstop.

[0014] As an embodiment, the concrete base plate is a reinforced concrete base plate.

[0015] As an embodiment, the waterproof coating is a polymer waterproof coating.

[0016] As an embodiment, the hydrophobic coating is a silica aerogel coating.

[0017] In another aspect, the present invention, when actually used, further provides a construction method for a base plate post-cast strip advance water-stop structure, comprising the following steps:

[0018] S101. Pour the foundation slab and simultaneously construct the concrete slab and reserve expansion joints;

[0019] S102, spraying a hydrophobic coating on the deformation joint;

[0020] S103, setting an external waterstop at the bottom of the deformation joint, filling a sealing glue in the middle of the deformation joint, and pre-buried a central waterstop;

[0021] S104, reserving a groove at the top of the deformation joint, and then pouring concrete;

[0022] S105: providing a waterproof coating on the top of the expansion joint.

[0023] As an embodiment, the method further includes filling the groove at the top of the deformation joint with sealant.

[0024] The beneficial effects of the present invention are as follows: the advanced water-stopping structure for the post-cast strip of the base plate provided by the present invention has a simple structure, convenient construction, and reasonable design. This solution casts the foundation base plate and the concrete base plate at the same time, effectively solving the problem of cold joints formed between the advanced water-stopping concrete base plate and the foundation base plate of the building structure in the prior art. The concrete base plate and the foundation base plate form a single unit, enhancing the integrity and further enhancing the waterproofing effect of the advanced water-stopping structure for the post-cast strip of the base plate. At the same time, the bionic tooth groove design is provided on both sides of the deformation joint to effectively disperse shear stress, reduce the risk of crack expansion, and further improve the stability of the advanced water-stopping structure for the post-cast strip of the base plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the advance water-stop structure of the base plate post-cast strip involved in one embodiment of the present invention.

[0026] Figure 2 for Figure 1 A partial enlarged view of the middle tooth groove.

[0027] Figure 3 The present invention is a flowchart of a construction method of an advanced water-stop structure for a post-cast strip of a base plate according to an embodiment of the present invention.

[0028] The reference numerals in the figures are:

[0029] 1. Concrete base plate; 2. External waterstop; 3. Sealing glue; 4. Embedded waterstop; 5. Hydrophobic coating; 6. Waterproof coating; 7. Sealant; 8. Tooth groove; 9. Groove; 10. Foundation base plate; 11. Post-cast strip. DETAILED DESCRIPTION

[0030] The exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0031] In addition, the accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and their repeated description will be omitted. It should be noted that in the present disclosure, the terms "including", "configured with", and "set on" are used to express open-ended inclusion and mean that in addition to the listed elements / components / etc., there may be additional elements / components / etc.; the terms "first", "second", etc. are used only as labels and are not intended to limit the number or order of their objects; the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention.

[0032] Unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0033] This embodiment discloses an advanced water-stopping structure for a base plate post-cast strip. The advanced water-stopping structure can be applied to basements, tunnels, high-rise buildings in water-rich areas, and other projects requiring high waterproof performance.

[0034] Please refer to Figure 1 and Figure 2 As shown together, the present invention provides a base plate post-casting strip advance water-stop structure, comprising: a foundation base plate 10, a concrete base plate 1, an expansion joint, and a waterstop. The concrete base plate 1 is fixedly mounted on the foundation base plate 10; the expansion joint is provided within the concrete base plate 1, with tooth grooves 8 provided on both sides of the expansion joint; the waterstop is provided within the expansion joint; wherein the waterstop comprises an external waterstop 2 and an embedded waterstop 4, the external waterstop 2 being provided at the bottom of the expansion joint, and the embedded waterstop 4 being provided in the middle of the expansion joint; the foundation base plate 10 and the concrete base plate 1 are cast at one time.

[0035] The above solution casts the foundation slab 10 and the concrete slab 1 at the same time, effectively solving the problem of cold joints formed between the advanced water-stopping concrete slab 1 and the foundation slab 10 of the building structure in the prior art, so that the concrete slab 1 and the foundation slab 10 form a whole, enhance the integrity, and further enhance the waterproof effect of the advanced water-stopping structure of the slab post-cast strip. At the same time, when constructing the foundation slab 10 and the concrete slab 1, deformation joints are reserved, and there is no need to chisel and waterproof inlay the deformation joints, which reduces the construction steps, increases the construction speed, and improves the waterproof effect. In addition, there are tooth grooves 8 on both sides of the deformation joint, and the tooth grooves 8 are staggered, such as Figure 2 As shown, the inclination angle α of the tooth groove 8 ranges from 50° to 60°. The bionic tooth groove design is used to effectively disperse the shear stress, enhance the ability to resist shear deformation, thereby reducing the risk of crack expansion and further improving the stability of the advance water-stop structure of the base plate post-casting strip.

[0036] As an embodiment, the thickness of the concrete base plate 1 is 300mm-400mm. Specifically, the concrete base plate 1 is a reinforced concrete base plate. The thick reinforced concrete base plate has good rigidity and can ensure the stability of the advanced water-stopping structure of the base plate post-casting strip of the present invention.

[0037] As an implementation method, the width spacing of the deformation joint is 30mm-50mm, which can provide sufficient deformation space for the structures on both sides.

[0038] As an embodiment, a hydrophobic coating 5 is provided on the water-facing surface of the expansion joint, and the thickness of the hydrophobic coating 5 is 0.5mm-1mm. Specifically, the hydrophobic coating 5 has important characteristics such as waterproof, anti-fog, anti-snow, anti-pollution, anti-adhesion, anti-oxidation, anti-corrosion and self-cleaning, and prevention of current conduction. More specifically, the hydrophobic coating 5 includes nanomaterials and fluoropolymers, and the nanomaterials include hydrophobic nano-silica coatings. The fluoropolymers include PTFE, FEP, ECTE, ETFE, PFA and other commonly used weather-resistant insulating hydrophobic coatings, and also include other synthetic fluoropolymers to make super-hydrophobic coatings. In the present invention, the waterproof and anti-pollution properties of the hydrophobic coating 5 are fully utilized to effectively reduce the pollution of the expansion joint and improve the wear resistance of the expansion joint, thereby extending the service life of the advanced water-stopping structure.

[0039] As an embodiment, a waterproof coating 6 is provided on the top of the deformation joint, and the waterproof coating 6 is used to form a waterproof barrier to prevent water from penetrating into the advanced water-stopping structure, thereby affecting the service life of the advanced water-stopping structure. More specifically, the waterproof coating 6 also needs to have a self-healing function, so that even if water penetrates into the advanced water-stopping structure, it can automatically heal tiny cracks to form a durable waterproof barrier, further extending the service life of the base plate post-casting strip advanced water-stopping structure of the present invention. In this solution, a waterproof coating 6 with a self-healing function is used, and the waterproof coating 6 is a polymer waterproof coating, which effectively solves the problem in the prior art that the coating of the deformation joint does not have a self-repairing ability, resulting in high maintenance costs after leakage, thereby reducing maintenance costs after leakage.

[0040] As an embodiment, the advance water-stopping structure of the base plate post-cast strip provided by the present invention also includes: a sealing glue 3, which is arranged between the external waterstop 2 and the embedded waterstop 4. The sealing glue 3 is used to seal the gap between the external waterstop and the embedded waterstop 4. Therefore, the sealing glue 3 has a waterproof function, and the sealing glue 3 also needs to have a stronger ability to expand when exposed to water, better elastic recovery ability, and not be easy to age and crack, so that it can effectively seal tiny gaps during application.

[0041] In the advanced water-stop structure of the post-cast strip of the base plate provided by the present invention, nano-scale polymer waterproof gel is filled between the external waterstop 2 and the embedded waterstop 4 in the deformation joint. Of course, other sealing glues with waterproof functions can also be filled here. The present invention does not limit the specific material of the sealing glue. Solutions that adopt the structure of the present invention and use sealing glues with the same functions and effects fall within the scope of protection of the present invention.

[0042] Specifically, a sealant 7 is provided at the upper deformation joint of the embedded waterstop 4 in the advanced waterstop structure of the base plate post-cast strip provided by the present invention. The sealant 7 is used to seal the deformation joint. The sealant 7 here should have good elasticity, flexibility, and wear resistance.

[0043] More specifically, in this solution, the expansion joint is filled with a graphene composite sealant 7. The graphene composite rubber sealing waterproof coating is a composite waterproof sealing coating made from a mixture of graphene, rubber asphalt, and additives. The graphene composite rubber can be applied directly to moist, uneven surfaces and various substrates. After curing, the coating transforms into an oily waterproof membrane with water and UV resistance. Furthermore, the cured oily waterproof membrane retains the elasticity and flexibility of rubber and exhibits good crack resistance. During use, even after extended use, the oily waterproof membrane remains intact even when the base layer is slightly cracked, without affecting the waterproofing effect. Therefore, after the coating dries, it can achieve the purpose of sealing and waterproofing various engineering joints. The graphene composite rubber forms a strong bond with various interfaces such as concrete, metal, and plastic, achieving a creep-resistant and crack-resistant sealing and waterproofing effect, completely solving the problem of water leakage in complex structures and diverse interfaces. The expansion joint filling solution of the present invention effectively solves the negative effects of the existing technology that uses a combination of rubber waterstop and asphalt for sealing, such as aging and cracking, and poor long-term waterproofing effect.

[0044] The present invention provides a detailed description of the advanced water-stopping structure of the post-cast strip of the bottom plate provided by the present invention through specific embodiments below.

[0045] This solution casts the foundation slab 10 and the concrete slab 1 at one time, effectively solving the problem of cold joints formed between the advanced water-stopping concrete slab 1 and the building structure foundation slab 10 in the prior art, so that the concrete slab 1 and the foundation slab 10 form a whole, enhancing the integrity and further enhancing the waterproof effect of the advanced water-stopping structure of the slab post-cast zone.

[0046] This solution can achieve one-time forming of advanced water-stopping methods, and reserve the position of expansion joints before pouring. There is no need to chisel the expansion joints and re-waterproof and caulk them later, which reduces construction time, improves construction efficiency, and avoids the problem of poor quality of subsequent chiseling of expansion joints.

[0047] This solution provides tooth grooves 8 on both sides of the deformation joint, and adopts a bionic tooth groove design to effectively disperse the shear stress, reduce the risk of crack expansion, and further improve the stability of the advanced water-stop structure of the base plate post-casting zone.

[0048] This solution incorporates a multi-gradient waterproofing system within the expansion joint. The first gradient involves spraying a hydrophobic coating 5 on the water-facing surface of the expansion joint. The second gradient involves filling the gap between the externally attached waterstop and the embedded waterstop 4 within the expansion joint with a nano-polymer waterproof gel. The third gradient involves sealing the expansion joint above the embedded waterstop 4 with a sealant 7. The fourth gradient involves applying a self-healing waterproof coating to the top of the expansion joint. This multi-gradient waterproofing system provides superior waterproofing performance, effectively resolving a range of issues associated with water seepage compared to existing technologies.

[0049] Please refer to Figure 3 As shown, another aspect of the present invention provides a construction method for a base plate post-casting strip advance water-stop structure, which, when actually used, comprises the following steps:

[0050] S101: Cast the foundation slab 10 while simultaneously constructing the concrete slab 1 and reserving an expansion joint. The simultaneous construction of the foundation slab 10 and the concrete slab 1 ensures that the slab post-cast strip 11 and the foundation slab 10 are truly integrated, significantly enhancing the waterproofing effect of the advanced water-stop post-cast strip.

[0051] This solution adopts the method of pouring the foundation slab 10 and the concrete slab 1 at the same time and forming them in one piece, which can effectively solve the hazards of cold joints in the secondary pouring and avoid the formation of cold joints between the advanced water-stop concrete slab 1 and the building structure foundation slab 10 in the prior art. The cold joints provide a channel for the invasion of moisture and harmful substances. The invasion of moisture and harmful substances will not only accelerate the corrosion process of the steel bars, but also promote the carbonization of the concrete, further reducing the durability and integrity of the structure.

[0052] S102, spraying a hydrophobic coating 5 on the deformation joint; specifically, spraying a silica aerogel hydrophobic coating 5 on the water-facing surface of the deformation joint, the hydrophobic coating 5 is a silica aerogel coating, forming a bottom waterproof barrier.

[0053] S103. Set an external waterstop 2 at the bottom of the deformation joint, fill the middle of the deformation joint with sealing glue 3, and pre-embed the embedded waterstop 4.

[0054] Specifically, the external waterstop 2 is installed and fixed at the bottom of the deformation joint. The external waterstop 2 can be fixed by gluing or other means to form the first waterproof barrier of the middle layer.

[0055] Specifically, nano-scale polymer waterproof gel is filled in the middle of the deformation joint. Nano-scale polymer waterproof gel is a solid material composed of nano-scale pores. The pore size is at the nanometer level, much smaller than water molecules, which means that it is difficult for water molecules to pass through these pores, thereby effectively blocking the penetration of water molecules. This unique solid nano-scale porous structure gives the gel excellent waterproof properties, forming a second waterproof barrier in the middle layer.

[0056] Specifically, the embedded waterstop 4 is pre-buried. The embedded waterstop 4 has good elasticity and deformation ability, can adapt to the expansion and deformation of the structure to prevent the leakage of water or other liquids, and form a third waterproof barrier in the middle layer.

[0057] S104: Reserve a groove 9 at the top of the expansion joint and then pour concrete.

[0058] Specifically, staggered bionic tooth grooves 8 are set on both sides of the deformation joint. The bionic tooth groove 8 design effectively disperses the shear stress, enhances the ability to resist shear deformation, thereby reducing the risk of crack expansion and further improving the stability of the advance water-stop structure of the base plate post-casting strip.

[0059] Specifically, a groove 9 is reserved at the top of the deformation joint, and the method further includes: filling the groove 9 at the top of the deformation joint with a sealant 7, where the sealant 7 is a graphene composite sealant.

[0060] S105. Provide a waterproof coating 6 on the top of the expansion joint.

[0061] Specifically, the waterproof coating 6 has a self-healing function and is a polymer waterproof coating. More specifically, the waterproof coating is a polymer self-healing waterproof coating. The polymer self-healing waterproof coating is applied to the back water surface of the top of the deformation joint to form an outer waterproof barrier.

[0062] The construction method of the advanced water-stop structure of the base plate post-cast strip provided by the present invention has the advantages of simple operation, convenient construction and reasonable design.

[0063] (1) This method uses a combination of polymer waterproof gel and graphene sealant to replace traditional asphalt and rubber to achieve dynamic repair and ultra-high impermeability; the hydrophobic nanocoating can reduce moisture adsorption by more than 90%.

[0064] (2) This method adopts the design of a multi-gradient waterproof system, and the multi-gradient synergistic effect of "hydrophobic-self-repairing-high-strength sealing" makes the advanced waterproof structure cast by this method more waterproof.

[0065] (3) This method designs bionic tooth grooves 8 on both sides of the deformation joint. The design of the bionic tooth grooves 8 effectively disperses the shear stress and reduces the risk of crack expansion in the structure.

[0066] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A base plate post-casting strip advanced water-stopping structure, characterized in that: include: foundation slab; A concrete bottom plate, fixedly arranged on the foundation bottom plate; A deformation joint is provided in the concrete bottom plate, and tooth grooves are provided on both sides of the deformation joint; A waterstop is provided in the deformation joint; wherein the waterstop includes an external waterstop and an embedded waterstop, the external waterstop is provided at the bottom of the deformation joint, and the embedded waterstop is provided in the middle of the deformation joint; The foundation slab and the concrete slab are cast at one time.

2. The advanced water-stopping structure of the bottom plate post-casting strip according to claim 1 is characterized in that: The thickness of the concrete base plate is 300mm-400mm.

3. The advanced water-stopping structure of the post-cast strip of the bottom plate according to claim 1 is characterized in that: The spacing between the deformation joints is 30mm-50mm.

4. The advanced water-stopping structure for the post-cast strip of the bottom plate according to claim 1 is characterized in that: A hydrophobic coating is provided on the water-facing surface of the deformation joint, and the thickness of the hydrophobic coating is 0.5mm-1mm; A waterproof coating is provided on the top of the deformation joint.

5. The advanced water-stopping structure of the post-cast strip of the bottom plate according to claim 1 is characterized in that: Also includes: The sealing glue is arranged between the external waterstop and the embedded waterstop.

6. The advanced water-stopping structure for the post-cast strip of the bottom plate according to claim 1 is characterized in that: The concrete base plate is a reinforced concrete base plate.

7. The advanced water-stopping structure for the post-cast strip of the bottom plate according to claim 4 is characterized in that: The waterproof coating is a polymer waterproof coating.

8. The advanced water-stopping structure for the post-cast strip of the bottom plate according to claim 4 is characterized in that: The hydrophobic coating is a silica aerogel coating.

9. A construction method, applied to the floor post-casting strip advance water-stop structure according to any one of claims 1 to 8, characterized in that: The steps include: S101. Pour the foundation slab and simultaneously construct the concrete slab and reserve expansion joints; S102, spraying a hydrophobic coating on the deformation joint; S103, setting an external waterstop at the bottom of the deformation joint, filling a sealing glue in the middle of the deformation joint, and pre-buried a central waterstop; S104, reserving a groove at the top of the deformation joint, and then pouring concrete; S105: providing a waterproof coating on the top of the expansion joint.

10. The construction method according to claim 9, characterized in that: Also includes: The groove at the top of the deformation joint is filled with sealant.

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