A precast concrete wall

Abstract

The utility model discloses a kind of precast concrete wall, including shear wall made of ordinary concrete and non-load-bearing wall made of ceramsite concrete. Demoulding is provided at the interface of shear wall and non-load-bearing wall, for separating two kinds of concrete and enhancing the coupling performance of bonding surface. Several first connecting components are laid along vertical direction in non-load-bearing wall, each first connecting component passes through demoulding and is anchored in shear wall, so that shear wall and non-load-bearing wall form integral force structure. The utility model solves the cracking problem of the interface of different performance concrete effectively through the synergistic effect of demoulding and connecting component, improves the integrity of composite wall, and realizes lightweight design and factory high-efficiency production simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated building technology, and in particular to a precast concrete wall. Background Technology

[0002] Modular integrated building (MIC), with its highly industrialized production model, prefabricates major building components in factories and then transports them to the site for rapid assembly, significantly improving construction efficiency, reducing resource consumption, and enhancing building quality. In this building system, to optimize structural performance and functionality, it is often necessary to use concrete materials with different properties within the same building component. Specifically, in wall components, load-bearing parts (shear walls) typically use high-strength ordinary concrete, while non-load-bearing parts can use lightweight, thermally insulating, and sound-insulating ceramsite concrete to achieve both structural lightweighting and functionalization.

[0003] However, the production process of this multi-material composite wall faces significant challenges. First, due to the different properties and pouring requirements of the two types of concrete, pouring is usually required in two stages, which not only increases the complexity of the process but also reduces the production efficiency of precast components. More importantly, the interface between the two types of concrete can easily become a weak point in the structure. Due to differences in shrinkage characteristics and elastic modulus, cracking and peeling are prone to occur at this interface during component transportation, hoisting, and use, affecting the integrity, durability, and waterproofing performance of the structure. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a precast concrete wall. To achieve the aforementioned objective, this utility model adopts the following technical solution: A precast concrete wall includes a shear wall made of ordinary concrete and a non-load-bearing wall made of lightweight aggregate concrete. At the junction of the shear wall and the non-load-bearing wall, a formwork-free installation is provided to separate the two types of concrete and enhance the coupling performance of their interface. Several first connecting components are laid vertically inside the non-load-bearing wall to enhance the structural performance of the non-load-bearing wall. Each first connecting component passes through the formwork-free and is anchored in the shear wall to connect the shear wall and the non-load-bearing wall and transfer stress, thereby forming an integral load-bearing structure between the shear wall and the non-load-bearing wall.

[0005] Furthermore, the shear wall is provided with a plurality of second connecting components for enhancing the structural performance of the shear wall. The end of the first connecting component is inserted into the second connecting component and fixed together with the second connecting component.

[0006] Furthermore, the formwork-free assembly is fixed to the first connecting component by binding or welding, so that the second connecting component, the formwork-free assembly, and the first connecting component form a whole, thereby improving the strength of the precast concrete wall.

[0007] Furthermore, the first connecting component is made of several steel mesh panels, and the second connecting component is configured as a steel cage.

[0008] Furthermore, the formwork-free design includes a mesh panel for venting air during pouring and allowing concrete slurry to penetrate along the mesh openings to form a rough interface, thereby improving shear resistance.

[0009] Furthermore, several reinforcing ribs are evenly distributed on the mesh plate to increase the strength of the mold-free formwork.

[0010] Furthermore, the ends of the precast concrete walls are pre-embedded with connection mechanisms for vertical and horizontal connection of the MIC modules on the construction site.

[0011] Furthermore, when the thickness of the shear wall and the non-load-bearing wall are inconsistent, the height of the formwork-free section is set to be equal to the thickness of the thicker side wall, and its cantilever section is fixed to the second connecting assembly by binding or additional support members, serving as the side formwork for the thicker part.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. In this utility model, a formwork-free interface is provided at the junction of the shear wall and the non-load-bearing wall, and a first connecting component passes through the formwork-free interface. This method achieves effective separation and reliable connection between two types of concrete with different properties, ensuring the organic integration of the load-bearing structure and the lightweight functional wall. Furthermore, the connecting component enables effective stress transfer, allowing the composite wall to form an integral load-bearing structure, significantly improving the bonding strength and crack resistance of the junction surfaces of the different concrete types.

[0013] 2. In this utility model, the first connecting component and the second connecting component are connected by an insertion method and combined with a mold-free system to form an integral skeleton system. In this way, the assembly and positioning of the entire reinforcing skeleton can be completed in the factory prefabrication stage, allowing ordinary concrete and ceramsite concrete to be formed in one step using a segmented casting process. This effectively solves the problems of complex procedures and low production efficiency caused by the need for two castings in traditional multi-material walls, and realizes the efficient integrated production of composite walls. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall structure of the precast concrete wall according to the first embodiment of this utility model; Figure 2 This is a schematic diagram of the overall structure of the first embodiment of the present invention, showing the mold-free design, the first connecting component, and the second connecting component working together. Figure 3 This is a schematic diagram of the overall structure of the precast concrete wall according to the second embodiment of this utility model; Figure 4 This is a schematic diagram of the overall structure of the second embodiment of the present invention, showing the mold-free design, the first connecting component, and the second connecting component working together.

[0015] In the attached drawings: precast concrete wall 100, shear wall 10, non-load-bearing wall 20, formwork-free 1, first connecting component 2, and second connecting component 3. Detailed Implementation

[0016] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0017] Example 1: To better understand the purpose, structure, and function of this utility model, a precast concrete wall of this utility model will be described in further detail below with reference to the accompanying drawings.

[0018] Figure 1 The illustration schematically shows a precast concrete wall according to the present invention. In such a way... Figure 1 In the illustrated embodiment, the precast concrete wall 100 includes a shear wall 10 made of ordinary concrete for load-bearing purposes. Simultaneously, the precast concrete wall 100 also includes a non-load-bearing wall 20 made of lightweight aggregate concrete. This reduces the overall weight of the concrete wall 100 and improves its thermal insulation and sound insulation properties, thereby facilitating transportation and installation.

[0019] In addition, such as Figure 1 , 2 As shown, a formwork-free installation 1 is provided at the interface between the shear wall 10 and the non-load-bearing wall 20. The formwork-free installation 1 is designed to allow separation of the two types of concrete and enhance the coupling performance of their interface. At the same time, a number of first connecting components 2 are laid vertically inside the non-load-bearing wall 20. The first connecting components 2 are used to enhance the structural performance of the non-load-bearing wall 20.

[0020] In this embodiment, as Figure 2As shown, each of the first connecting components 2 passes through the formwork-free 1 and extends into the shear wall 10, and is anchored to the shear wall 10. In this way, the first connecting components 2 can connect the shear wall 10 and the non-load-bearing wall 20 together, allowing stress to be transferred between them, thus forming an integral load-bearing structure. This arrangement allows the shear wall 10 and the non-load-bearing wall 20 to be pre-cast as a whole, thereby improving their load-bearing performance.

[0021] In one embodiment, such as Figure 2 As shown, a plurality of second connecting components 3 are provided within the shear wall 10. These second connecting components 3 are configured to enhance the structural performance of the shear wall 10. Simultaneously, the end of the first connecting component 2 is inserted into the second connecting component 3 and fixed relative to it. In this manner, the shear wall 10 and the non-load-bearing wall 20 can be further stably connected, thereby further increasing the overall load-bearing capacity of both the shear wall 10 and the non-load-bearing wall 20.

[0022] According to a preferred embodiment of the present invention, such as Figure 2 As shown, the formwork 1 is fixed to the first connecting component 2 by binding or welding. In this way, the second connecting component 3, the formwork 1, and the first connecting component 2 together form a whole, which is used to improve the strength of the precast concrete wall 100.

[0023] In one embodiment, such as Figure 2 As shown, the first connecting component 2 is made of several steel mesh panels, and the second connecting component 3 is configured as a steel cage. In this way, the first connecting component 2 can bear the main load from the concrete wall 100 and provides a stable anchoring point for the first connecting component 2. Simultaneously, it increases its bending and shear resistance. Furthermore, configuring the second connecting component 3 as a steel mesh panel enhances the integrity of the non-load-bearing wall 20 itself and stably transfers stress to the shear wall 10.

[0024] In one embodiment, such as Figure 1 , 2 As shown, the formwork-free system 1 includes a mesh plate for expelling air during pouring and allowing concrete slurry to penetrate along the mesh openings to form a rough interface, thereby improving shear resistance. Simultaneously, several reinforcing ribs are evenly distributed on the mesh plate to increase the strength of the formwork-free system 1.

[0025] In one embodiment, such as Figure 1As shown, a connecting mechanism (not shown in the figure) is pre-embedded at the end of the precast concrete wall 100 for vertical and horizontal connection of the MIC module on the construction site. It should be noted that the structure of the connecting mechanism and its connection relationship with the precast concrete wall 100 are well known to those skilled in the art. Therefore, they will not be described in detail here.

[0026] Example 2: Figure 3 , 4 The diagram illustrates the specific structure of a second embodiment of the precast concrete wall 100 of this invention. This embodiment differs from the first in that it employs non-load-bearing walls 20 of varying thicknesses. In this embodiment, when the thicknesses of the shear wall 10 and the non-load-bearing wall 20 are inconsistent, the height of the non-removable formwork 1 is set to be equal to the thickness of the thicker side wall, and its cantilevered section is fixed to the second connecting assembly 3 via binding or additional supports, serving as the side formwork for the thicker portion.

[0027] The operation of manufacturing the precast concrete wall 100 according to this utility model is as follows.

[0028] First, the precast skeleton is assembled and positioned: the steel cage, which serves as the second connecting component 3, is positioned and fixed according to the design requirements. Then, the formwork 1, which has been fixedly connected to the first connecting component 2 (steel mesh) by binding or welding, is hoisted into place as a whole, ensuring that the end of the first connecting component 2 is accurately inserted into the steel cage of the second connecting component 3, and a reliable connection is achieved by binding or welding, forming a complete reinforced skeleton system.

[0029] Next, the concrete is poured in sections: first, ordinary concrete is poured for section 10 of the shear wall. The concrete is vibrated to fully fill the reinforcing cage. At this time, the mesh on the formwork 1 can both expel air and allow a small amount of concrete slurry to penetrate, forming a rough interface at the junction. After section 10 of the shear wall has initially set, the ceramsite concrete for section 20 of the non-load-bearing wall is poured to ensure that the concrete completely wraps the reinforcing mesh and forms a lightweight thermal insulation layer.

[0030] When the thicknesses of the two walls are inconsistent, the height of the non-removable mold 1 is set to be the same as that of the thicker wall. Its cantilever section is fixed to the second connecting component 3 by binding or additional support, and is used as the side mold of the thicker wall to ensure the forming quality of the wall with different thicknesses.

[0031] Finally, curing and finished product processing are carried out: After curing is completed in accordance with regulations, the quality of the formed wall is inspected to confirm that the position of the pre-embedded connection mechanism is accurate. The qualified precast concrete wall 100 is transported to the storage yard to prepare for the subsequent on-site assembly of MIC modules.

[0032] The precast concrete wall 100 produced by this process achieves integrated molding of load-bearing structure and maintenance function. Two types of concrete with different properties are organically combined through the absence of demolding to form an overall load-bearing system, which not only ensures structural safety but also achieves the goals of lightweighting and functionality.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A precast concrete wall, comprising a shear wall (10) made of ordinary concrete and a non-load-bearing wall (20) made of lightweight aggregate concrete, characterized in that: At the junction of the shear wall (10) and the non-load-bearing wall (20), a formwork-free installation (1) is provided. Several first connecting components (2) are laid vertically inside the non-load-bearing wall (20), and each of the first connecting components (2) passes through the formwork (1) and is anchored in the shear wall (10).

2. The precast concrete wall according to claim 1, characterized in that, The shear wall (10) is provided with a number of second connecting components (3), the end of the first connecting component (2) is inserted into the second connecting component (3) and fixed together with the second connecting component (3).

3. The precast concrete wall according to claim 2, characterized in that, The mold-free assembly (1) is fixed to the first connecting component (2) by binding or welding, so that the second connecting component (3), the mold-free assembly (1), and the first connecting component (2) form a whole.

4. The precast concrete wall according to claim 3, characterized in that, The first connecting component (2) is made of several steel mesh sheets, and the second connecting component (3) is configured as a steel cage.

5. The precast concrete wall according to claim 1, characterized in that, The non-removable mold (1) includes a mesh plate.

6. The precast concrete wall according to claim 5, characterized in that, Several reinforcing ribs are also evenly arranged on the mesh plate to increase the strength of the non-removable mold (1).

7. The precast concrete wall according to claim 1, characterized in that, The ends of the precast concrete wall (100) are pre-embedded with connecting mechanisms.

8. The precast concrete wall according to claim 1, characterized in that, When the thickness of the shear wall (10) is inconsistent with that of the non-load-bearing wall (20), the height of the formwork (1) is set to be equal to the thickness of the thicker side of the wall, and its cantilever section is fixed to the second connecting component (3) by binding or additional support.

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