Splicing joint of prefabricated wall panel

Abstract

The utility model relates to the field of fabricated buildings, and discloses a splicing joint of prefabricated wallboards, which comprises two wallboard bodies in butt joint, a prefabricated inner template and a prefabricated outer template are respectively arranged on the inner side and the outer side of two ends of each wallboard body, sliding chutes with openings facing the outer side are pre-embedded in the end parts of the prefabricated inner template and the prefabricated outer template, and the sliding chutes are embedded in the outer side of the prefabricated inner template and the outer side of the prefabricated outer template. Steel plates which are connected with the sliding grooves in the other wallboard body in an inserted mode are embedded in the two ends of the wallboard body respectively. Every two adjacent wallboard bodies are spliced through steel plates and sliding grooves in an inserted mode, a pouring cavity is defined by the prefabricated inner formwork and the prefabricated outer formwork at the splicing position, a pre-assembled steel reinforcement framework is arranged in the pouring cavity, and connection of every two adjacent wallboard bodies is completed by pouring cast-in-place concrete into the pouring cavity. After the two adjacent wallboard bodies are spliced, the pouring cavity is defined by the prefabricated outer formwork and the prefabricated inner formwork, formwork erecting construction does not need to be carried out on site, construction efficiency is greatly improved, and labor intensity is reduced.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated buildings, and in particular to a splicing node for prefabricated wall panels. Background Technology

[0002] In prefabricated buildings, the splicing joints between precast wall panels are a crucial technology that requires attention and breakthroughs. Currently, splicing joints between precast wall panels are divided into dry connections and wet connections. Dry connections offer advantages such as fast construction speed, lower construction difficulty, and energy efficiency and environmental friendliness. However, the force transmission of dry connection joints differs from that of cast-in-place concrete, making it difficult to achieve the same level of performance. Therefore, wet connections are often chosen for the joints in many prefabricated wall panel structures, where cast-in-place concrete is used at the splicing points. Traditional wet connection methods require on-site formwork construction on both the inside and outside of the joint, which is complex, time-consuming, and labor-intensive. It also necessitates addressing the issue of grout leakage at the formwork affecting surface quality, and requires subsequent treatment of the holes created by the tie rods used to secure the formwork.

[0003] Chinese patent application CN202421522845.2, filed on June 28, 2024, discloses a connection node for a prefabricated wall panel structure. This eliminates the need for additional outdoor formwork during on-site pouring, making construction faster and the connection node stronger, thus reducing on-site wet work. However, it still has the following drawbacks:

[0004] 1. Indoor formwork still needs to be erected on-site. Since the outdoor formwork is a precast formwork integrated with the precast wall panels, the indoor formwork can only be fixed from the inside or by pre-embedding nuts in the precast wall panels and tightening the indoor formwork with tie rods. The former is troublesome to fix, while the latter requires pre-embedding nuts and dealing with the holes caused by the tie rods later, both of which are time-consuming and labor-intensive.

[0005] 2. Similarly, leakage of grout at the indoor formwork may also affect the surface molding quality.

[0006] Based on this, this application provides a splicing node for prefabricated wall panels that does not require the erection of templates and has reliable connection to solve the above problems. Utility Model Content

[0007] This utility model aims to solve the technical problems existing in the prior art. To this end, this utility model provides a splicing node for prefabricated wall panels that does not require the erection of templates and has a reliable connection.

[0008] The technical solution adopted by this utility model to solve its technical problem is:

[0009] A splicing node for precast wall panels is provided, comprising two wall panel bodies that are connected to each other. Precast inner templates and precast outer templates are respectively provided at both ends of the wall panel bodies, located on the inner and outer sides. The ends of the precast inner and outer templates are pre-embedded with outward-facing grooves. Steel plates are pre-embedded at both ends of the wall panel bodies to interlock with the grooves on the other wall panel body. Adjacent wall panel bodies are spliced ​​together by the steel plates and grooves. The splicing point is enclosed by the precast inner and outer templates to form a casting cavity. A pre-assembled steel reinforcement skeleton is provided within the casting cavity. The connection between the adjacent wall panel bodies is completed by pouring cast-in-place concrete into the casting cavity.

[0010] In some optional embodiments, PE rods and sealant are sequentially installed from the inside out at the joints between the prefabricated inner template and the prefabricated outer template and the wall panel body to which they are spliced.

[0011] In some alternative embodiments, the chute is welded to the main reinforcement bars inside the wall panel body via multiple first connecting steel bars, one end of the steel plate is welded to the main reinforcement bars inside the wall panel body via multiple second connecting steel bars, and the other end extends out of the wall panel body.

[0012] In some alternative embodiments, multiple exposed studs are pre-embedded on the relatively inner sides of the prefabricated inner and outer templates.

[0013] In some alternative embodiments, the pre-assembled steel reinforcement cage is welded to the studs of the precast outer formwork by multiple third connecting steel bars.

[0014] In some alternative embodiments, the exposed length of the stud is less than the distance between the pre-assembled steel reinforcement cage and the precast inner formwork or precast outer formwork.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model combines two adjacent wall panels and uses prefabricated outer and inner templates to form a casting cavity, eliminating the need for on-site formwork construction, greatly improving construction efficiency, reducing labor intensity, and ensuring the surface quality of the wall panels.

[0017] 2. The sliding grooves set at the ends of the precast inner template and the precast outer template, as well as the steel plates set on the wall panel body, can achieve precise docking between two adjacent wall panels and also have a limiting function. On the other hand, the steel plates can also seal the joints between the precast inner template or the precast outer template and the wall panel body.

[0018] 3. The studs embedded in the inner side of the precast inner and outer formwork can increase the bonding strength between the cast-in-place concrete and the wall panel body. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments 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 based on these drawings without creative effort, wherein:

[0020] Figure 1 This is a structural schematic diagram of the wall panel body provided by this utility model;

[0021] Figure 2 This is a schematic diagram of the splicing nodes of the prefabricated wall panel provided by this utility model;

[0022] Figure 3 yes Figure 2 A magnified view of the provided area.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1—Wall panel body, 1.1—Precast inner formwork, 1.2—Precast outer formwork, 2—Slide groove, 3—Steel plate, 4—First connecting reinforcement, 5—Second connecting reinforcement, 6—Pre-assembled reinforcement cage, 7

[0025] —Cast-in-place concrete, 8—PE rod, 9—Sealant, 10—Stud, 11—Third connecting steel bar. Detailed Implementation

[0026] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. 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 scope of protection of the present utility model.

[0028] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Furthermore, the terms "first," "second," etc., used in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. The terms "installed," "connected," and "joined" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0031] Example 1

[0032] This embodiment provides a splicing node for prefabricated wall panels, including two wall panel bodies 1 that are connected opposite each other. (See attached...) Figure 1 As shown, the wall panel body 1 has prefabricated inner templates 1.1 and prefabricated outer templates 1.2 at both ends, one inside and one outside. The ends of the prefabricated inner templates 1.1 and 1.2 are pre-embedded with outward-facing grooves 2. Steel plates 3 are pre-embedded at both ends of the wall panel body 1 to intersect with the grooves 2 on another wall panel body. Specifically, in this embodiment, the bottom or back of the groove 2 is welded to the main reinforcement inside the wall panel body 1 by multiple first connecting steel bars 4. The opening end of the groove 2 has a flared guide opening to facilitate the entry of the steel plate 3 into the groove 2. The width of the groove 2 is slightly greater than the thickness of the steel plate 3, and the length of the groove 2 is equal to the height of the wall panel body 1. In this embodiment, the bottom of one end of the steel plate 3 is welded to the main reinforcement inside the wall panel body 1 by multiple second connecting steel bars 5, and the other end extends out of the wall panel body 1 for interlocking with the groove 2.

[0033] As attached Figure 2 and attached Figure 3 As shown, the two adjacent wall panel bodies 1 are joined together by steel plate 3 and sliding groove 2. The joint is enclosed by the precast inner template 1.1 and precast outer template 1.2 to form a casting cavity. The casting cavity is equipped with a pre-assembled steel reinforcement skeleton 6. The connection between the two adjacent wall panel bodies 1 is completed by pouring cast-in-place concrete 7 into the casting cavity.

[0034] Preferred options are listed below. Figure 2 and attached Figure 3As shown, in this embodiment, PE rods 8 and sealant 9 are sequentially installed from the inside to the outside at the joint between the prefabricated inner template 1.1 and the prefabricated outer template 1.2 and the wall panel body 1 to which they are spliced, to fill the joint. The sealant can be silicone sealant.

[0035] Preferred options are listed below. Figure 1 As shown, in this embodiment, multiple exposed studs 10 are pre-embedded on the inner sides of the precast inner template 1.1 and the precast outer template 1.2 to increase the bonding strength between the cast-in-place concrete 7 and the wall panel body 1.

[0036] Preferred options are listed below. Figure 2 As shown, in this embodiment, the pre-assembled steel reinforcement cage 6 is welded to the studs 10 of the prefabricated outer formwork 1.2 by multiple third connecting steel bars 11.

[0037] Preferred options are listed below. Figure 2 As shown, in this embodiment, the exposed length of the stud 10 is less than the distance between the pre-assembled steel reinforcement skeleton 6 and the prefabricated inner template 1.1 or the prefabricated outer template 1.2, which can prevent interference between the prefabricated wall panel to be installed and the pre-assembled steel reinforcement skeleton when it is hoisted and lowered.

[0038] In practice, firstly, the pre-assembled steel reinforcement cage is welded to the studs on the installed precast wall panel via the third connecting steel reinforcement. Then, the precast wall panel to be installed is hoisted to the side above the installed precast wall panel, aligning the inner and outer grooves and steel plates at the bottom of the splicing end of the precast wall panel to be installed with the inner and outer steel plates and grooves of the installed precast wall panel. Then, the precast wall panel to be installed is slowly lowered to the bottom. PE rods are first placed in the inner and outer joints of the splicing area, and then sealed with sealant. Finally, cast-in-place concrete is poured into the pouring cavity.

[0039] It is worth noting that precast wall panels and floor slabs typically use a sleeve grouting connection. This means that a sleeve is pre-embedded at the bottom of the precast wall panel, and connecting steel bars are installed on the floor slab. The sleeve inside the precast wall panel is inserted into the connecting steel bars through hoisting, and then grout is injected into the sleeve. Therefore, in this embodiment, when assembling the precast wall panels, a hoisting method is used. The precast wall panel to be installed is aligned with the grooves and steel plates on the already installed precast wall panel (at this time, the sleeve and connecting steel bars are also aligned), and then the precast wall panel to be installed is positioned at the bottom to complete the assembly.

[0040] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A spliced joint of prefabricated wall panels comprising two wall panel bodies abutting each other, characterized in that: The wall panel body has prefabricated inner templates and prefabricated outer templates on both the inner and outer sides. The ends of the prefabricated inner templates and prefabricated outer templates are pre-embedded with sliding grooves facing outwards. The two ends of the wall panel body are pre-embedded with steel plates that are inserted into the sliding grooves on another wall panel body. The two adjacent wall panels are joined together by steel plates and grooves. The joint is enclosed by the precast inner template and the precast outer template to form a casting cavity. A pre-assembled steel reinforcement skeleton is set in the casting cavity. The connection between the two adjacent wall panels is completed by pouring cast-in-place concrete into the casting cavity.

2. A spliced joint of prefabricated wall panels according to claim 1, characterized in that: At the joints between the prefabricated inner template and the prefabricated outer template and the wall panel body to which they are spliced, PE rods and sealant are sequentially installed from the inside out.

3. The spliced joint of prefabricated wall panels according to claim 1, characterized in that: The chute is welded to the main reinforcement of the wall panel body through multiple first connecting steel bars. One end of the steel plate is welded to the main reinforcement of the wall panel body through multiple second connecting steel bars, and the other end extends out of the wall panel body.

4. The spliced node of prefabricated wall panels according to claim 1, characterized in that: Multiple exposed head studs are pre-embedded on the inner side of the prefabricated inner template and the prefabricated outer template.

5. A spliced joint of prefabricated wall panels according to claim 4, characterized in that: The pre-assembled steel reinforcement cage is welded to the studs of the precast outer formwork by multiple third connecting steel bars.

6. A spliced joint of prefabricated wall panels according to claim 5, characterized in that: The exposed length of the stud is less than the distance between the pre-assembled steel reinforcement cage and the precast inner formwork or precast outer formwork.

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