A fabricated PC component

Abstract

The utility model discloses an assembly type PC component relates to building industrialization technical field. The component includes the component body of concrete prefabrication, and is equipped with the connecting structure on at least one connecting edge. The connecting structure includes the convex part and the recessed part of parallelly arranged, and the shape of both mutually adapts to realize the mortise and tenon type splicing of component. The convex part inlay has first embedded section bar, and the recessed part inlay has second embedded section bar, and when the component splicing is through the section bar lap joint and is fastened with high -strength bolt, and the connecting strength is greatly strengthened. The recessed part bottom still is equipped with the sealant strip groove of multiple filling with the water -swelling sealant strip, has realized the double sealing effect of physical extrusion and water -swelling. The utility model solves the problem of high connection precision requirement, node strength deficiency, poor waterproof performance and other problems of existing PC component, has the advantages such as accurate positioning, quick installation, reliable connection, excellent sealing and the like.

Description

Technical Field

[0001] This utility model relates to the field of PC component technology, specifically to an assembled PC component. Background Technology

[0002] Prefabricated buildings have been widely used in the modern construction industry due to their advantages such as fast construction speed, low environmental pollution, and high building quality. As a core component of prefabricated buildings, the performance of precast concrete (PC) components directly affects the overall quality, construction efficiency, and construction costs of the building.

[0003] Existing prefabricated PC components, such as precast wall panels and precast floor slabs, are typically connected by pre-installing reinforcing cages or embedded parts at the edges of the components, and then connecting them through cast-in-place concrete or welding. This method has the following drawbacks: (1) The connection is prone to become a weak link: the joint surface between the post-cast concrete area and the precast component is prone to become a weak link in the structure, affecting the integrity and seismic performance of the structure.

[0004] (2) Waterproof sealing performance depends on subsequent treatment: Waterproofing at component joints usually depends on the sealant or additional waterproof layer installed later, which poses a risk to long-term reliability and durability. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a prefabricated PC component. Through improvements to its structure, this component can achieve precise docking and effectively enhance the strength, integrity, and waterproof sealing performance of the connection nodes.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A prefabricated PC component includes a component body made of precast concrete, and a connecting structure is provided on at least one connecting edge of the component body; the connecting structure includes: a protrusion extending along the length direction of the connecting edge; and a recess arranged parallel to the protrusion and extending along the length direction of the connecting edge; the shapes of the protrusion and the recess are adapted to each other, so that the protrusion of the component body can be embedded in the recess of its adjacent component body to achieve splicing between the two.

[0007] The protrusion is embedded with a first pre-embedded steel section, and the recess is embedded with a second pre-embedded steel section; when adjacent components are spliced ​​together, the first pre-embedded steel section and the second pre-embedded steel section overlap or butt with each other.

[0008] The bottom of the recess is also provided with at least one sealing strip groove extending along its length, and the sealing strip groove is filled with a water-swellable sealing strip.

[0009] Preferably, the cross-section of the protrusion is trapezoidal; correspondingly, the cross-section of the recess is a trapezoidal groove adapted to the protrusion.

[0010] Preferably, the first embedded steel is a U-shaped channel steel with folding plates fixedly connected to its upper and lower ends, and the second embedded steel is also a U-shaped channel steel with cover plates fixedly connected to its upper and lower ends, thereby sealing both ends of the second embedded steel.

[0011] Preferably, the total height of the two cover plates and the second embedded steel is equal to the height of the first embedded steel, and the distance between the cover plate and the side edge of the component body is greater than or equal to the thickness of the folding plate. Both the folding plate and the cover plate are provided with screw holes. When the folding plate is pressed onto the cover plate, the two are fastened together by bolts.

[0012] Preferably, the component body is further provided with a steel mesh frame, and the first and second pre-embedded steel sections are welded and fixed to their respective steel mesh frames.

[0013] Preferably, there are two sealing strip grooves, located on both sides of the bottom of the recess.

[0014] The beneficial effects of this utility model are: (1) Through the tenon-and-mortise joint of the protrusion and the recess, the components can be accurately aligned during the hoisting process, which greatly reduces the difficulty of installation and the dependence on the technical level of the operators, realizes rapid and accurate positioning and installation, and significantly improves construction efficiency.

[0015] (2) The adjacent components are spliced ​​together by two sets of protrusions and recesses, achieving a double connection. In addition, the steel profiles embedded in the protrusions and recesses can form a reliable mechanical connection after the components are spliced, and are further tightened by bolts, effectively transferring the load, greatly enhancing the stiffness and strength of the connection nodes, and improving the overall seismic performance of the structure.

[0016] (3) The water-swellable sealing strip pre-installed at the bottom of the recess can immediately form the first line of defense when the components are assembled and compressed. If water seeps in from the outside, the water-swellable sealing strip will absorb water and expand, further filling the joint tightly and forming a second active seal, thus achieving double waterproof protection and a long-lasting and reliable sealing effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the present invention; Figure 2 for Figure 1 A magnified view of a portion of the image; Figure 3 This is a schematic diagram of the first and second embedded steel sections; Figure 4This is a schematic diagram showing the connection between the steel reinforcement mesh and the first and second embedded steel sections, respectively. In the figure: 1-Component body, 2-Connecting edge, 3-Protrusion, 4-Recess, 5-First embedded steel, 6-Second embedded steel, 7-Sealing strip groove, 8-Sealing strip, 9-Folding plate, 10-Cover plate, 11-Rebar mesh. Detailed Implementation

[0018] 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.

[0019] Please see Figure 1-4 An assembled PC component, taking a precast exterior wall panel as an example, includes a component body 1 made of precast concrete, and an integrally formed connection structure is provided on two opposite connecting edges 2 of the component body 1 (in actual applications, multiple edges can be provided).

[0020] The connecting structure includes a protrusion 3 with a trapezoidal cross-section and a recess 4 with a trapezoidal groove cross-section, which are arranged side by side and run along the length of the connecting edge 2.

[0021] The protrusion 3 and the recess 4 are adapted to each other, so that the protrusion 3 of the component body can be inserted into the recess 4 of its adjacent component body from top to bottom or from bottom to top, so as to realize the splicing of the two.

[0022] Inside the protrusion 3, a first embedded steel section 5 is pre-embedded; in this example, channel steel is used. Inside the recess 4, a second embedded steel section 6 is pre-embedded; in this example, channel steel is also used. The first embedded steel section 5 and the second embedded steel section 6 are welded and fixed to the steel mesh frame 11 inside the component body 1 during prefabrication to ensure their coordinated work with the concrete.

[0023] When adjacent component bodies 1 are spliced, the first embedded steel 5 and the second embedded steel 6 overlap or butt-join each other. Specifically, the width of the second embedded steel 6 is equal to the spacing of the inner walls of the first embedded steel 5, so that the second embedded steel 6 can be embedded in the first embedded steel 5, and after embedding, the outer wall of the second embedded steel 6 contacts the inner wall of the first embedded steel 5.

[0024] The recessed portion 4 has sealing strip grooves 7 extending along its length on both sides of its bottom. These grooves are located on both sides of the second embedded steel section 6, and are filled with water-swellable sealing strips 8. The sealing strips can be made of nitrile rubber, with polyurethane water-absorbing resin evenly dispersed in the rubber matrix. In a dry state, the strip achieves initial sealing by generating contact pressure between its rubber elasticity and the contact surface. When a small amount of external moisture seeps in through the joint, the hydrophilic polymer material in the strip rapidly absorbs the moisture and expands in volume, generating greater expansion pressure within the sealing cavity. This tightly blocks all seepage channels, achieving an active and stronger secondary seal.

[0025] Folding plates 9 are fixedly connected to the upper and lower ends of the first embedded steel section 5, and cover plates 10 are fixedly connected to the upper and lower ends of the second embedded steel section 6, sealing both ends of the second embedded steel section 6 with the cover plates 10. The total height of the two cover plates 10 and the second embedded steel section 6 is equal to the height of the first embedded steel section 5, and the height of the first embedded steel section is less than the height of the component body. That is, there is a gap between the cover plate and the edge of the side of the component body, which is greater than or equal to the thickness of the folding plate 9. When the folding plate 9 is pressed on the cover plate 10, the folding plate 9 will not protrude from the component body, thus preventing the side of the component body from bulging out. Both the folding plate 9 and the cover plate 10 are provided with screw holes. When the folding plate 9 is pressed on the cover plate 10, the two are fastened with bolts.

[0026] The dimensions of this component can be prefabricated according to the construction site or required dimensions.

[0027] When two identical PC components are joined, the left component is suspended above the right component, aligning the protrusion 3 of the left component with and embedding it into the recess 4 of the right component. During this process, the inclined surfaces of the protrusion 3 and the recess 4 act as guides and positions the components. Simultaneously, the second embedded steel section is embedded into the first embedded steel section until both are in contact. Then, the folding plate is flipped over, pressing it onto the cover plate. Finally, the bolts are tightened to secure the folding plate and the cover plate, firmly connecting them together.

[0028] At the same time, the end of the protrusion 3 will squeeze the sealing strip 8 inside the recess 4, causing it to deform and form a tight first seal. If moisture intrudes from the joint in the future, the water-swelling sealing strip 8 will absorb water and expand, completely blocking the seepage path and forming a more reliable second seal.

[0029] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A prefabricated PC component, characterized in that: The component body (1) is made of precast concrete, characterized in that at least one connecting edge (2) of the component body (1) is provided with a connecting structure; the connecting structure includes: The protrusion (3) extends along the length direction of the connecting edge (2); The recessed portion (4) is arranged side by side with the protruding portion (3) and extends along the length direction of the connecting edge (2); The protrusion (3) and the recess (4) are adapted to each other so that the protrusion (3) of the component body can be embedded in the recess (4) of its adjacent component body to achieve splicing of the two. The protrusion (3) is embedded with a first pre-embedded steel section (5), and the recess (4) is embedded with a second pre-embedded steel section (6); when adjacent components are spliced ​​together, the first pre-embedded steel section (5) and the second pre-embedded steel section (6) overlap or connect with each other. The bottom of the recess (4) is also provided with at least one sealing strip groove (7) extending along its length direction, and the sealing strip groove (7) is filled with a water-swellable sealing strip (8).

2. The prefabricated PC component according to claim 1, characterized in that: The cross-section of the protrusion (3) is trapezoidal; correspondingly, the cross-section of the recess (4) is a trapezoidal groove that matches the protrusion (3).

3. The prefabricated PC component according to claim 2, characterized in that: The first embedded steel (5) is a U-shaped channel steel with folding plates (9) fixedly connected to its upper and lower ends. The second embedded steel (6) is also a U-shaped channel steel with cover plates (10) fixedly connected to its upper and lower ends. The two ends of the second embedded steel (6) are sealed by the cover plates (10).

4. A prefabricated PC component according to claim 3, characterized in that: The total height of the two cover plates (10) and the second embedded steel (6) is equal to the height of the first embedded steel (5), and the distance between the cover plate and the side edge of the component body is greater than or equal to the thickness of the folding plate (9). Both the folding plate (9) and the cover plate (10) are provided with screw holes. When the folding plate (9) is pressed on the cover plate (10), the two are fastened together by bolts.

5. A prefabricated PC component according to claim 4, characterized in that: The component body (1) is also provided with a steel mesh frame (11), and the first embedded steel (5) and the second embedded steel (6) are welded and fixed to their respective steel mesh frames (11).

6. A prefabricated PC component according to claim 5, characterized in that: The number of sealing strip grooves (7) is two, located on both sides of the bottom of the recess (4).

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