Prefabricated composite wall structure

Abstract

The utility model discloses an assembled composite wall structure belongs to building wall structure technical field, including prefabricated concrete outer layer, cavity heat preservation module and inboard form, and the cavity between inboard form and cavity heat preservation module is provided with a plurality of three -dimensional space truss, and prefabricated concrete outer layer, cavity heat preservation module and inboard form are connected through anchoring assembly, and the cavity between inboard form and cavity heat preservation module is provided with post -poured concrete layer, and post -poured concrete layer fills through hole channel. The utility model discloses through three -dimensional space truss has improved the shear capacity and the collaborative working performance of the superimposed surface between prefabricated concrete outer layer and post -poured concrete layer, and the structure is safe and reliable, and the through hole channel forms the dense concrete dowel when post -poured concrete, realizes the structural mechanical anchoring of heat preservation layer and concrete layer, and the adjacent wallboard is connected through the reserved ring muscle and the filling area, and the upper and lower wallboard is connected through the grouting sleeve, forms the reliable connection of vertical and horizontal two -way.

Description

Technical Field

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

[0002] With the rapid development of industrialized construction, prefabricated buildings have been widely used due to their advantages such as high construction efficiency, minimal environmental impact, and easy assurance of building quality. As a major vertical load-bearing component in prefabricated buildings, the performance of prefabricated composite walls directly affects the overall safety and functionality of the building.

[0003] Existing prefabricated composite walls typically consist of precast concrete layers, cast-in-place concrete layers, and intermediate steel trusses. To meet building energy efficiency requirements, an insulation layer is usually placed between the precast and cast-in-place layers, forming a sandwich insulation system. However, existing sandwich insulation composite wall structures still face many technical challenges in practice that urgently need to be addressed.

[0004] Insufficient connection reliability: The connection between the insulation layer and the inner and outer concrete layers mainly relies on traditional planar truss reinforcement and bonding mortar. Planar truss reinforcement can only provide two-dimensional constraints, offering limited tethering effect on the insulation layer, and the shear resistance of the overlapping surface needs further improvement. In long-term use, there is a risk of the insulation layer separating from the concrete layer, affecting structural safety.

[0005] The integrity of vertical and horizontal wall connections needs to be strengthened: the vertical joints between adjacent wall panels are complex to handle, and if not handled properly, they can easily become weak points in the structure, affecting the overall rigidity and seismic performance of the building. Utility Model Content

[0006] The purpose of this utility model is to provide a prefabricated composite wall structure to solve the problems of insufficient connection reliability of existing composite wall structures and the need to strengthen the overall integrity of vertical and planar connections of the walls.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] This utility model discloses a prefabricated composite wall structure, comprising a precast concrete outer layer, a cavity insulation module disposed on the inner side of the precast concrete outer layer, an inner template disposed on the inner side of the cavity insulation module, and a plurality of three-dimensional spatial trusses disposed in the cavity between the inner template and the cavity insulation module. The precast concrete outer layer, the cavity insulation module and the inner template are connected by anchoring components. A post-cast concrete layer is disposed in the cavity between the inner template and the cavity insulation module, and the post-cast concrete layer fills the through-holes on the cavity insulation module.

[0009] Furthermore, the side of the precast concrete outer layer is provided with ring-shaped steel bars, and the ring-shaped steel bars of two adjacent precast concrete outer layers are arranged alternately in the vertical direction, with vertical steel bars passing through them. A filling area is provided at the connection between two adjacent precast concrete outer layers.

[0010] Furthermore, a side plate is provided on the outer side of the precast concrete outer layer near the connection.

[0011] Furthermore, the bottom edge of the precast concrete outer layer is provided with connecting steel bars, and the top of the precast concrete outer layer is provided with a grouting sleeve. The connecting steel bars of the upper precast concrete outer layer are inserted into the grouting sleeve of the lower precast concrete outer layer and the gaps are filled with grouting filler.

[0012] Furthermore, the cavity insulation module has a splicing groove on its side, and when two adjacent cavity insulation modules are spliced ​​together, the splicing grooves interlock with each other.

[0013] Furthermore, the splicing groove is configured as convex or concave or serrated.

[0014] Furthermore, the anchoring assembly includes an anchoring bolt and a pre-embedded sleeve. The pre-embedded sleeve is disposed inside the outer layer of the precast concrete. The anchoring bolt passes through the inner template, the post-cast concrete layer, and the through-hole before entering the pre-embedded sleeve. The end of the anchoring bolt pushes the top block to move and tighten the pre-embedded sleeve.

[0015] Furthermore, the inner template is provided with mounting holes for accommodating the operating end of the anchor bolt.

[0016] Furthermore, the cross-section of the three-dimensional space truss is set as a triangle.

[0017] Furthermore, the through-hole is configured in a dumbbell shape.

[0018] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0019] This utility model utilizes a three-dimensional design of a spatial truss, with its diagonal reinforcing bars penetrating the concrete layer from multiple angles, providing comprehensive mechanical interlocking and anchoring. This significantly improves the shear resistance and collaborative performance of the overlapping surface between the precast concrete outer layer and the post-cast concrete layer, ensuring that the wall as a whole bears the load and that the structure is safe and reliable. The through-holes of the cavity insulation module form dense concrete pins during the post-cast concrete pouring, achieving structural mechanical anchoring between the insulation layer and the concrete layer. Adjacent wall panels are connected by reserved ring reinforcement and filling areas, and upper and lower wall panels are connected by grouting sleeves, forming a reliable connection in both longitudinal and transverse directions, ensuring the integrity and seismic performance of the building. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 This is a top view of the prefabricated composite wall structure of this utility model;

[0022] Figure 2 This is a front view of the precast concrete outer layer of this utility model;

[0023] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0024] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0025] Figure 5 for Figure 2 Enlarged view of point C in the middle;

[0026] Figure 6 This is a front view of the cavity insulation module of this utility model;

[0027] Figure 7 for Figure 1 Enlarged view at point D;

[0028] Figure 8 This is a schematic diagram of the structure of the anchoring component of this utility model;

[0029] Figure 9 This is a schematic diagram of the three-dimensional space truss of this utility model.

[0030] Explanation of reference numerals in the attached drawings: 1. Precast concrete outer layer; 1-1. Ring reinforcement; 1-2. Side plate; 1-3. Vertical reinforcement; 1-4. Filling area; 1-5. Grouting sleeve; 1-6. Connecting reinforcement; 2. Cavity insulation module; 2-1. Through-hole; 3. Three-dimensional space truss; 4. Inner formwork; 4-1. Installation hole; 5. Post-poured concrete layer; 6. Anchoring component; 6-1. Anchor bolt; 6-2. Embedded sleeve; 6-3. Top block. Detailed Implementation

[0031] like Figure 1-9As shown, a prefabricated composite wall structure includes a precast concrete outer layer 1, a cavity insulation module 2 disposed on the inner side of the precast concrete outer layer 1, an inner template 4 disposed on the inner side of the cavity insulation module 2, and a plurality of three-dimensional space trusses 3 disposed in the cavity between the inner template 4 and the cavity insulation module 2. The precast concrete outer layer 1, the cavity insulation module 2 and the inner template 4 are connected by an anchoring component 6. A post-cast concrete layer 5 is disposed in the cavity between the inner template 4 and the cavity insulation module 2, and the post-cast concrete layer 5 fills the through-holes 2-1 on the cavity insulation module 2.

[0032] The precast concrete outer layer 1 is prefabricated in the factory and can come with its own decorative surface layer, such as ceramic tiles or paint base. The cavity insulation module 2 is made of flame-retardant EPS or XPS material through molding, with through-holes 2-1 embedded inside. These through-holes 2-1 are filled during the subsequent concrete pouring, forming "concrete pins" that greatly enhance the adhesion and peel resistance between the insulation layer and the concrete. The three-dimensional space truss 3 provides shear resistance and anchoring in three-dimensional space, significantly improving the integrity of the composite wall. The inner formwork 4 uses permanent formwork that does not need to be removed, such as cement fiber pressure board or wire mesh board. This inner formwork 4 serves as both the mold for the subsequent concrete pouring and the base layer for interior plastering.

[0033] like Figure 2-5 As shown, the precast concrete outer layer 1 has a steel mesh inside. The side steel bars of the precast concrete outer layer 1 are bent outward to form ring steel bars 1-1. When two adjacent precast concrete outer layers 1 are spliced, the ring steel bars 1-1 of the two adjacent precast concrete outer layers 1 are staggered vertically, with vertical steel bars 1-3 passing through them. A filling area 1-4 is set at the connection between two adjacent precast concrete outer layers 1. Concrete is poured in the filling area 1-4 to connect the two precast concrete outer layers 1 together. A side plate 1-2 is connected to the outer side of the precast concrete outer layer 1 near the connection. The side plate 1-2 serves as a formwork for pouring concrete, eliminating the need for on-site formwork and improving construction efficiency. Through the post-poured concrete and the dense ring steel bar connection, a cast-in-place integral wall structure is formed, which has high structural strength and good seismic performance.

[0034] The bottom edge of the precast concrete outer layer 1 is reserved with connecting steel bars 1-6, and the top of the precast concrete outer layer 1 is pre-embedded with grouting sleeves 1-5. When two adjacent precast concrete outer layers 1 are installed, the connecting steel bars 1-6 of the upper precast concrete outer layer 1 are inserted into the grouting sleeves 1-5 of the lower precast concrete outer layer 1 and the gap is filled with grout. The grout can be a high-strength special cement-based grout. After it solidifies, the connecting steel bars 1-6 and grouting sleeves 1-5 of the upper and lower layers are reliably connected together.

[0035] like Figure 6 As shown, the cavity insulation module 2 has splicing grooves on its side. When two adjacent cavity insulation modules 2 are spliced, the splicing grooves interlock. The splicing grooves are convex-concave or serrated. The interlocking cavity insulation modules 2 form staggered paths with the concrete in the post-cast area, greatly extending the path of heat transfer through the concrete and significantly improving the insulation performance of vertical joints; the interlocking structure can also act as a sealing strip for the cast-in-place concrete to prevent grout leakage.

[0036] like Figure 7-8 As shown, the anchoring assembly 6 includes an anchoring bolt 6-1 and a pre-embedded sleeve 6-2. The pre-embedded sleeve 6-2 is disposed inside the outer layer 1 of the precast concrete. The anchoring bolt 6-1 passes through the inner template 4, the post-cast concrete layer 5, and the through hole 2-1 before entering the pre-embedded sleeve 6-2. The end of the anchoring bolt 6-1 pushes the top block 6-3 to move and tighten the pre-embedded sleeve 6-2.

[0037] The inner template 4 has a mounting hole 4-1 for accommodating the operating end of the anchor bolt 6-1; after installation, the operating end of the anchor bolt 6-1 is located in the mounting hole 4-1, ensuring that the inner surface of the inner template 4 is flat.

[0038] The through-hole 2-1 is designed in the shape of a dumbbell; when concrete is poured into the through-hole 2-1, it forms a dumbbell-shaped "concrete pin" to improve the connection strength.

[0039] like Figure 9 As shown, several three-dimensional spatial trusses 3 are vertically arranged along the height of the wall panel. The cross-section of the three-dimensional spatial truss 3 is set as a triangle, forming a triangular prism spatial structure. One vertex of the triangle is pressed against the cavity insulation module 2, the second vertex is pressed against the inner template system, and the third vertex is suspended in the post-cast concrete layer. A large number of diagonal web members penetrate the concrete from different directions, forming an all-round "anchor hook", which has a very strong mechanical interlocking and bonding force with the concrete, greatly improving the shear resistance of the composite surface. In order to ensure the positional stability of the three-dimensional spatial truss 3, some anchoring components 6 can pass through the first and second vertices of the triangle of the three-dimensional spatial truss 3, thereby connecting the precast concrete outer layer 1, the cavity insulation module 2, the three-dimensional spatial truss 3, and the inner template 4 into a whole structure.

[0040] The construction process of this utility model is as follows:

[0041] Factory prefabrication stage:

[0042] Fabrication of precast concrete outer layer 1: Steel mesh is laid in the mold and embedded parts (including grouting sleeves 1-5, embedded sleeves 6-2, etc.) are placed. Then concrete is poured and cured to form the integrated precast concrete outer layer 1.

[0043] On-site construction preparation stage:

[0044] Lifting: Using a crane, the precast concrete outer layer 1 is lifted to the installation position through the lifting components embedded in the precast concrete outer layer 1;

[0045] Installation of adjacent wall panels: The ring steel bars 1-1 in the filling area 1-4 between adjacent wall panels should be staggered and tied to the additional vertical steel bars 1-3 for fixation;

[0046] Combined cavity insulation module 2 and precast concrete outer layer 1: Apply polymer mortar adhesive to the outside of cavity insulation module 2 and bond it to the inside of precast concrete outer layer 1.

[0047] Install the three-dimensional space truss 3 and inner template 4: the precast concrete outer layer 1, the cavity insulation module 2 and the inner template 4 are connected by the anchoring component 6, and the cavity edge between the inner template 4 and the cavity insulation module 2 is supported by the template.

[0048] Concrete pouring: The cavity between the inner template 4 and the cavity insulation module 2 is poured from the top of the wall to form the post-poured concrete layer 5, and the filling area 1-4 is poured to make them a complete concrete whole.

[0049] Curing: Allow the post-poured concrete to cure fully until it reaches the design strength, then remove the temporary formwork.

[0050] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A prefabricated composite wall structure, characterized in that: The structure includes a precast concrete outer layer (1), a cavity insulation module (2) is provided on the inner side of the precast concrete outer layer (1), an inner template (4) is provided on the inner side of the cavity insulation module (2), and a number of three-dimensional space trusses (3) are provided in the cavity between the inner template (4) and the cavity insulation module (2). The precast concrete outer layer (1), the cavity insulation module (2) and the inner template (4) are connected by an anchoring component (6). A post-cast concrete layer (5) is provided in the cavity between the inner template (4) and the cavity insulation module (2). The post-cast concrete layer (5) fills the through-hole (2-1) on the cavity insulation module (2).

2. The prefabricated composite wall structure according to claim 1, characterized in that: The side of the precast concrete outer layer (1) is provided with ring steel bars (1-1), and the ring steel bars (1-1) of two adjacent precast concrete outer layers (1) are staggered in the vertical direction, and vertical steel bars (1-3) are passed through them. A filling area (1-4) is provided at the connection between two adjacent precast concrete outer layers (1).

3. The prefabricated composite wall structure according to claim 2, characterized in that: A side plate (1-2) is provided on the outer side of the precast concrete outer layer (1) near the connection.

4. The prefabricated composite wall structure according to claim 1, characterized in that: The bottom edge of the precast concrete outer layer (1) is provided with connecting steel bars (1-6), and the top of the precast concrete outer layer (1) is provided with a grouting sleeve (1-5). The connecting steel bars (1-6) of the upper precast concrete outer layer (1) are inserted into the grouting sleeve (1-5) of the lower precast concrete outer layer (1) and the gap is filled by grouting filler.

5. The prefabricated composite wall structure according to claim 1, characterized in that: The cavity insulation module (2) has a splicing groove on its side. When two adjacent cavity insulation modules (2) are spliced ​​together, the splicing grooves interlock with each other.

6. The prefabricated composite wall structure according to claim 5, characterized in that: The splicing groove is configured as either convex or concave or serrated.

7. The prefabricated composite wall structure according to claim 1, characterized in that: The anchoring assembly (6) includes an anchoring bolt (6-1) and a pre-embedded sleeve (6-2). The pre-embedded sleeve (6-2) is disposed inside the outer layer (1) of the precast concrete. The anchoring bolt (6-1) passes through the inner template (4), the post-cast concrete layer (5), and the through hole (2-1) before entering the pre-embedded sleeve (6-2). The end of the anchoring bolt (6-1) pushes the top block (6-3) to move and tighten the pre-embedded sleeve (6-2).

8. The prefabricated composite wall structure according to claim 7, characterized in that: The inner template (4) is provided with mounting holes (4-1) for accommodating the operating end of the anchor bolt (6-1).

9. The prefabricated composite wall structure according to claim 1, characterized in that: The cross-section of the three-dimensional space truss (3) is set as a triangle.

10. The prefabricated composite wall structure according to claim 1, characterized in that: The through-hole (2-1) is configured in the shape of a dumbbell.

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