Prefabricated expansion joint structure and construction method of pool structure

Abstract

The present invention discloses a prefabricated expansion joint structure for a pool-like structure and its construction method. The structure is manufactured in a factory to uniform standards, ensuring quality. This prevents damage to the rubber waterstop during on-site concrete pouring, allowing for full water-stopping effectiveness. The process of on-site formwork reinforcement is eliminated, shortening construction time. The present invention addresses the problems of existing pool expansion joints during construction, such as the easy breakage of the rubber waterstop and the difficulty and time involved in formwork reinforcement.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a prefabricated expansion joint structure of a pool-like structure and a construction method thereof. Background Art

[0002] Pool expansion joints are structural joints installed at appropriate locations along the construction slits of buildings or structures to prevent cracking or damage to the components of the pool building due to changes in climate temperature (thermal expansion, cold contraction). Pool expansion joints divide the building components above the foundation into two independent parts, allowing the pool building and structure to expand and contract horizontally in the length direction, and play an important role in concrete pools. However, due to on-site construction and process errors, pool expansion joints often differ from expectations. This is mainly reflected in the fact that the quality of concrete pouring cannot be fully guaranteed, the rubber waterstop is easily damaged, and the formwork reinforcement is difficult and time-consuming. Due to the large number of processes, the risk of water leakage is very high.

[0003] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0004] In order to overcome the defects of the existing technology, a prefabricated expansion joint structure and a construction method for a pool-like structure are provided to solve the problems of easy damage of rubber waterstop strips, difficulty in template reinforcement and long time in the construction process of existing pool expansion joints.

[0005] In order to achieve the above object, a prefabricated expansion joint structure of a pool structure is provided, comprising a plurality of unit structures connected end to end, wherein the unit structures include

[0006] A support plate is embedded in the foundation cushion layer, and two opposite sides of the support plate are respectively formed with limited convex ridges;

[0007] Two piers are arranged opposite to each other, and an expansion joint is formed between the two piers. A receiving groove is formed at the bottom of the pier, and the limiting ridge is embedded in the receiving groove. Opposite sides of the two piers are formed with mounting grooves arranged opposite to each other, and the tops of the opposite sides of the piers are formed with notches, and the bottoms of the opposite sides are extended to form reinforcement parts. A plurality of anchoring bars are embedded in the piers, some of the anchoring bars extend to the outside of the notches, and some of the anchoring bars pass through the reinforcement parts and extend to the outside of the reinforcement parts. A socket is formed on the end face of one end of the pier, and a splicing bar is formed at the other end of the pier, and the splicing bar is inserted into the socket holes of adjacent piers.

[0008] A rear-mounted waterstop, with opposite sides of the rear-mounted waterstop respectively embedded in the mounting grooves of the two pier bars;

[0009] Sealing plates are respectively embedded in the upper and lower parts of the expansion joint, and a pouring space is formed between the seaming plates and the inner wall of the expansion joint opening, and the pouring space is filled with sealant.

[0010] Furthermore, the vertical side walls of the notch and the middle portions of the opposite sides of the pier strips are respectively roughened side walls.

[0011] Furthermore, a steel plate water stop is installed in the middle of the opposite side of the pier, and one side of the steel plate water stop extends to the outside of the pier.

[0012] Furthermore, a plurality of grouting holes are formed on the top of the pier bar, some of the grouting holes are connected to the socket hole, and some of the grouting holes are connected to the installation groove.

[0013] Furthermore, the support plate is an inorganic plate.

[0014] Furthermore, the caulking board is a polyethylene foam plastic board.

[0015] Furthermore, the ends of the piers of the unit structure at both ends of the prefabricated expansion joint structure are embedded with connecting sleeves for inserting the bottom ends of the vertical main reinforcements of the wall columns.

[0016] The present invention provides a construction method for a prefabricated expansion joint structure of a pool structure, comprising the following steps:

[0017] The supporting plates of the multiple unit structures are erected on the foundation along the length direction of the expansion joint of the pool structure;

[0018] Casting a base cushion layer on the foundation so that the support plate is embedded in the base cushion layer;

[0019] On opposite sides of the support plate, the limiting ridges of the support plate are embedded in the pier bar receiving grooves, so that an expansion joint is formed between the two pier bars;

[0020] Filling the lower portion of the expansion joint with sealant, and embedding a caulking plate at the lower portion of the expansion joint;

[0021] Filling the post-installed waterstop in the installation grooves of the two pier bars, and pouring grout into the installation grooves so that the opposite sides of the post-installed waterstop are respectively embedded in the installation grooves of the two pier bars;

[0022] A caulking plate is embedded in the upper part of the expansion joint, and a sealant is filled in the upper part of the expansion joint;

[0023] Concrete is poured on the cushion layers on opposite sides of the expansion joint so that the anchor bars of the pier strips are anchored in the concrete to form a bottom plate of the pool-like structure.

[0024] The beneficial effects of the present invention are that the prefabricated expansion joint structure of the water tank structure of the present invention is manufactured in a factory according to unified standards, and its quality can be guaranteed. This avoids damage to the rubber waterstop during concrete pouring at the construction site, allowing its waterstop effect to be fully utilized, eliminating the process of on-site formwork reinforcement, and saving construction time. The prefabricated expansion joint structure of the water tank structure of the present invention optimizes the shortcomings of conventional construction methods and processes, provides new ideas and new construction methods for prefabricated expansion joints, and is conducive to the national promotion of prefabricated and assembled structures and the implementation of green construction and low-carbon building requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0026] Figure 1 This is a structural schematic diagram of a prefabricated expansion joint structure of a pool-like structure according to an embodiment of the present invention.

[0027] Figure 2 This is a structural schematic diagram of the unit structure at the front end of the prefabricated expansion joint structure of the pool-like structure according to an embodiment of the present invention.

[0028] Figure 3 This is a structural schematic diagram of the unit structure in the middle part of the prefabricated expansion joint structure of the pool-like structure according to an embodiment of the present invention.

[0029] Figure 4 This is a structural schematic diagram of the unit structure at the rear end of the prefabricated expansion joint structure of the pool-like structure according to an embodiment of the present invention.

[0030] Figure 5 Schematic diagram of the end surface of the unit structure according to an embodiment of the present invention.

[0031] Figure 6 2 is a cross-sectional view of a unit structure according to an embodiment of the present invention.

[0032] Figures 7 to 12 Schematic diagram of the steps of the construction method of the prefabricated expansion joint structure of the pool structure according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the accompanying drawings.

[0034] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] Reference Figures 1 to 12 As shown, the present invention provides a prefabricated expansion joint structure for a pool-like structure, comprising a plurality of unit structures A.

[0036] In this embodiment, multiple unit structures A are arranged along the length direction of the expansion joint at the bottom of the pool-like structure. Multiple unit structures A are connected end to end.

[0037] For details, see Figures 2 to 4 Each unit structure A includes a supporting plate 1, two piers 2, a post-installed waterstop 3 and a filling plate 4.

[0038] The support plate 1 is embedded in the foundation cushion 5. The foundation cushion is cast on the foundation. Position-limiting ridges 11 are formed on opposite sides of the support plate 1. The position-limiting ridges are arranged along the length of the expansion joint. In this embodiment, the cross-section of the position-limiting ridges is rectangular.

[0039] As a preferred embodiment, the support plate is an inorganic plate.

[0040] The support plate, measuring 1400mm x 3000mm x 50mm, serves as the framework for the precast components directly bearing pressure. It is constructed from materials such as silicate, inorganic fiber, mineral fiber, quartz sand, and a Class 5 waterproof coating. It also incorporates a single layer of steel mesh to enhance the tensile and bearing capacity of the baseplate. The ends of the support plate are recessed approximately 50mm to reinforce the connection between the precast components and the cushion foundation.

[0041] The piers are prefabricated reinforced concrete bars. Two piers 2 are positioned opposite each other, forming an expansion joint a between the two piers 2. A receiving groove is formed at the bottom of each pier 2. The receiving groove is located on one side of the pier. The support plate's limiting ribs 11 are embedded in the receiving groove.

[0042] The opposite sides of the two piers 2 are formed with mounting grooves arranged opposite to each other. The shape of the mounting grooves matches the shape and size of one side of the rear-installed water stop.

[0043] A notch b is formed at the top of the opposite side of the pier 2. A reinforcement portion 22 is formed extending from the bottom of the opposite side of the pier 2.

[0044] See Figure 5 and Figure 6Multiple anchor bars 21 are embedded within the pier 2. Some of these bars extend beyond the notch b. Others extend through the reinforcement and beyond. A socket is formed at one end of the pier 2. A splice bar is formed at the other end of the pier 2. The splice bar is inserted into the socket of the adjacent pier 2.

[0045] In this embodiment, the notch of the pier strip has a horizontal inner wall and a vertical inner wall. The top surface of the reinforcement portion of the pier strip 2 is an inclined surface, and the top surface of the reinforcement portion is arranged obliquely upward and inward.

[0046] Specifically, three levels of steel bars are set in the pier, including distribution bars, stirrups, and frame bars according to the mechanical properties and bending properties required by the design.

[0047] In this embodiment, multiple upper and lower main bars are embedded within the pier strip. The upper and lower main bars are arranged along the length of the pier strip. The upper and lower main bars are arranged in a matrix. The lower main bars are also arranged in a matrix.

[0048] The outer hoop of the plurality of upper main bars is provided with a first hoop. The first hoop is connected to an anchor bar. The anchor bar of the first hoop passes through the horizontal side wall of the notch and extends into the notch.

[0049] Second stirrups are provided on the outer sides of the plurality of lower main reinforcement bars. The second stirrups are connected to anchor bars. The anchor bars of the second stirrups pass through the inclined surface of the reinforcement part and extend to the outside of the reinforcement part.

[0050] In addition, Z-shaped anchor bars are embedded in the lower and upper portions of the pier strips. The Z-shaped anchor bars in the lower portion of the pier strip extend through the outer side of the reinforcement and outward. The Z-shaped anchor bars in the upper portion of the pier strip extend through the horizontal sidewalls of the notch and outward, allowing them to be anchored in the concrete of the base slab during the subsequent pouring of the pool structure.

[0051] The post-installed waterstop 3 adopts CB type rubber waterstop (buried type with holes in the middle), model 655, specification 450mm×10mm, and is installed inside the expansion joint.

[0052] The opposite sides of the post-installed water stop 3 are respectively embedded in the installation grooves of the two pier bars 2.

[0053] The caulking plates 4 are respectively embedded in the upper and lower parts of the expansion joint a. A pouring space is formed between the caulking plates 4 and the inner wall of the seam opening of the expansion joint a. The pouring space is filled with sealant.

[0054] The vertical side walls of the notch b and the middle portion of the opposite side of the pier 2 are respectively roughened side walls.

[0055] A steel plate water stop 6 is installed in the middle of the opposite side of the pier 2, and one side of the steel plate water stop 6 extends to the outside of the pier 2.

[0056] The size of the steel plate waterstop is 300mm×3mm, of which about 10cm of the upper part is exposed outside the component.

[0057] In this embodiment, pre-embedded lifting rings are installed at the top of the pier bar. Specifically, they are embedded every 1 meter on both sides of the upper surface of the pier bar, with the horizontal distance between the pre-embedded lifting rings not less than 50 mm. These pre-embedded lifting rings enhance stability during lifting. The specifications are C10, with a core diameter of 50 mm, an exposed length of 50 mm, and an embedded depth of 350 mm.

[0058] A plurality of grouting holes are formed on the top of the pier bar 2, some of the grouting holes are connected to the socket holes, and some of the grouting holes are connected to the installation grooves.

[0059] The filling board 4 is a polyethylene foam board. The specifications of the filling board are 30mm×200mm, the compression deformation rate is ≤3.0%, the elongation is ≥100%, and the water absorption rate is ≥0.005g / cm 3 , used for filling expansion joints, can adapt to its natural expansion and contraction changes, and can enhance the sealing and expansion effect of the joints.

[0060] The sealant is a two-component polysulfide sealant with a size of 30x60mm and is used to seal the post-installed waterstop inside the prefabricated expansion joint components.

[0061] The ends of the pier bars 2 of the unit structure A at both ends of the prefabricated expansion joint a are embedded with connecting sleeves for inserting the bottom ends of the vertical main reinforcements of the wall columns.

[0062] The present invention provides a construction method for a prefabricated expansion joint structure of a pool structure, comprising the following steps:

[0063] S1: If Figure 7 As shown, the supporting plates 1 of a plurality of unit structures A are erected on the foundation along the length direction of the expansion joint a of the pool-like structure.

[0064] Clean the base plate foundation, remove the debris and loose soil on the base, make the base soil flat, clean and firm, then position and lay out the production range of the prefabricated inorganic board (i.e. the supporting board) on the base plate, calculate its position and mark the points according to the specifications of the prefabricated inorganic board and components, assemble the prefabricated inorganic board and then install it within the layout range according to the marked position before pouring the foundation cushion layer, and pour the foundation cushion layer after installation.

[0065] S2: Continue reading Figure 7 , a base cushion layer 5 is poured on the foundation, so that the support plate 1 is embedded in the base cushion layer 5.

[0066] S3: If Figure 8 and Figure 9As shown, the limiting ridges 11 of the supporting plate 1 are embedded in the accommodating grooves of the pier bars 2 on opposite sides of the supporting plate 1 , so that an expansion joint a is formed between the two pier bars 2 .

[0067] Clean the prefabricated inorganic board to make the surface flat, clean and firm, then sleeve the accommodating groove on the lower side of the supporting plate onto the protruding limiting ridges on the side end of the prefabricated inorganic board and install it firmly.

[0068] S4: As Figure 10 As shown, the seam opening at the lower part of the expansion joint a is filled with sealant, and a filling plate 4 is embedded in the lower part of the expansion joint a.

[0069] Use two-component polysulfide sealant to seal the bottom of the expansion joint. Ensure that the adhesive layer is smooth and has no cracks or bubbles. Once the surface is flat and smooth, and the adhesive is applied fully and without debonding, fill the joint with low-expansion polyethylene foam board (i.e., caulking board). The edge of the caulking board should coincide with the structural outline of the pier. The joint must be tightly fitted and smooth.

[0070] S5: If Figure 11 As shown, the rear-mounted waterstop 3 is filled in the installation grooves of the two pier bars 2, and grout is poured into the installation grooves so that the opposite sides of the rear-mounted waterstop 3 are respectively embedded in the installation grooves of the two pier bars 2.

[0071] After the bottom of the expansion joint is filled, install the rubber water stop to make it firm and accurately positioned. Its center line should be aligned with the center line of the expansion joint. There should be no cracks or holes on the surface of the water stop. After installation, ensure that the connection between it and the pier is flat and clean.

[0072] S6: As Figure 12 As shown, a caulking plate 4 is embedded in the upper part of the expansion joint a, and a sealant is filled in the upper part of the expansion joint a.

[0073] Continue to fill the joints with low-foam polyethylene foam plastic boards, make the joints firm and flat, and seal the top with two-component polysulfide sealant to make it firmly bonded to the expansion joint. The bonding seams are required to be neat and smooth.

[0074] S7: Concrete is poured on the cushion layer 5 on opposite sides of the expansion joint a, so that the anchor bars 21 of the pier bar 2 are anchored in the concrete to form the bottom plate of the pool structure.

[0075] After the installation of the unit structure is completed, the splicing bars of the piers of the adjacent unit structures are connected through the embedded sleeves in the horizontal sockets, and then the lower ends of the vertical main reinforcements of the wall or the theme are inserted into the vertically arranged connecting sleeves at both ends of the prefabricated expansion joint structure to connect the prefabricated expansion joint structure with the vertical main reinforcements of the wall or column. Finally, through the grouting diversion holes (some diversion holes are connected to the following space, and some diversion holes are connected to the sockets), the post-installed water stop is embedded in the slurry in the installation hole, the splicing bars are buried in the slurry in the sockets, and the holes at the embedded lifting rings are filled with grout.

[0076] The prefabricated expansion joint structure for a pool-like structure of the present invention is manufactured in a factory to uniform standards, ensuring quality. This prevents damage to the rubber waterstop during on-site concrete pouring, allowing for full water-stopping effectiveness. It also eliminates the need for on-site formwork reinforcement, saving construction time. The prefabricated expansion joint structure for a pool-like structure of the present invention optimizes the shortcomings of conventional construction methods and processes, providing new ideas and construction methods for prefabricated expansion joints. This contributes to the country's promotion of prefabricated and assembled structures and the implementation of green construction and low-carbon building requirements.

[0077] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. A prefabricated expansion joint structure for a pool structure, characterized in that: It includes a plurality of unit structures connected end to end, and the unit structure includes A support plate is embedded in the foundation cushion layer, and two opposite sides of the support plate are respectively formed with limited convex ridges; Two piers are arranged opposite to each other, and an expansion joint is formed between the two piers. A receiving groove is formed at the bottom of the pier, and the limiting ridge is embedded in the receiving groove. Opposite sides of the two piers are formed with mounting grooves arranged opposite to each other, and the tops of the opposite sides of the piers are formed with notches, and the bottoms of the opposite sides are extended to form reinforcement parts. A plurality of anchoring bars are embedded in the piers, some of the anchoring bars extend to the outside of the notches, and some of the anchoring bars pass through the reinforcement parts and extend to the outside of the reinforcement parts. A socket is formed on the end face of one end of the pier, and a splicing bar is formed at the other end of the pier, and the splicing bar is inserted into the socket holes of adjacent piers. A rear-mounted waterstop, with opposite sides of the rear-mounted waterstop respectively embedded in the mounting grooves of the two pier bars; Sealing plates are respectively embedded in the upper and lower parts of the expansion joint, and a pouring space is formed between the seaming plates and the inner wall of the expansion joint opening, and the pouring space is filled with sealant.

2. The prefabricated expansion joint structure of a pool structure according to claim 1, characterized in that: The vertical side walls of the notch and the middle portion of the opposite sides of the pier are respectively roughened side walls.

3. The prefabricated expansion joint structure of a pool structure according to claim 2, characterized in that: A steel plate water stop is installed at the middle portion of the opposite sides of the pier bar, and one side of the steel plate water stop extends to the outside of the pier bar.

4. The prefabricated expansion joint structure of a pool structure according to claim 1, characterized in that: A plurality of grouting holes are formed on the top of the pier bar, some of the grouting holes are connected to the socket hole, and some of the grouting holes are connected to the installation groove.

5. The prefabricated expansion joint structure of a pool structure according to claim 1, characterized in that: The supporting plate is an inorganic plate.

6. The prefabricated expansion joint structure of a pool structure according to claim 1, characterized in that: The caulking plate is a polyethylene foam plastic plate.

7. The prefabricated expansion joint structure of a pool structure according to claim 1, characterized in that: The ends of the pier bars of the unit structure at both ends of the prefabricated expansion joint structure are embedded with connecting sleeves for inserting the bottom ends of the vertical main reinforcements of the wall columns.

8. A construction method for a prefabricated expansion joint structure of a pool structure according to any one of claims 1 to 7, characterized in that: The following steps are involved: The supporting plates of the multiple unit structures are erected on the foundation along the length direction of the expansion joint of the pool structure; Casting a base cushion layer on the foundation so that the support plate is embedded in the base cushion layer; On opposite sides of the support plate, the limiting ridges of the support plate are embedded in the pier bar receiving grooves, so that an expansion joint is formed between the two pier bars; Filling the lower portion of the expansion joint with sealant, and embedding a caulking plate at the lower portion of the expansion joint; Filling the post-installed waterstop in the installation grooves of the two pier bars, and pouring grout into the installation grooves so that the opposite sides of the post-installed waterstop are respectively embedded in the installation grooves of the two pier bars; A caulking plate is embedded in the upper part of the expansion joint, and a sealant is filled in the upper part of the expansion joint; Concrete is poured on the cushion layers on opposite sides of the expansion joint so that the anchor bars of the pier strips are anchored in the concrete to form a bottom plate of the pool-like structure.

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