A connecting structure of a prefabricated hollow floor and a PC outer wall
Patent Information
- Application Number
- CN202522552589.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-01
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-12-01
AI Technical Summary
[0002]随着建筑工业化的快速发展，预制混凝土结构因其施工效率高、工程质量易控等优点被广泛应用；然而，预制空心楼板与PC外墙之间的连接问题一直是制约装配式建筑整体性能的关键技术难点之一；传统的连接方式，如角钢连接，不仅安装效率较低，其连接稳固性也难以保证，往往需要大量现场湿作业，如支模和浇筑混凝土，这不仅增加了施工的复杂性和工期，连接稳固性也无法得到保障
[0014]本实用新型的有益效果是：本实用新型通过将楼板端部混凝土结构设计成由交错分布的混凝土凸块和混凝土凹槽构成的结构，当空心楼板通过楼板端部混凝土结构插设于楼板安装凹槽进行安装后，楼板安装凹槽内的混凝土由混凝土凹槽浇筑，使得预制楼板端部混凝土结构与楼板安装凹槽内的混凝土嵌合，以为二者的连接提供机械咬合和抗剪能力，且混凝土凸块的端部固定安装有锚固钢筋，当楼板安装凹槽内的混凝土浇筑完成后，楼板安装凹槽内的混凝土会将锚固钢筋完全包裹锚固，使得空心楼板的荷载能通过锚固钢筋可靠地传递到PC外墙中，同时，第一PC预制板和第二PC预制板通过第一连接钢筋牢固的拉结在一起，保证竖向结构连接的稳固性；另外，本实用新型的连接结构在施工时，只需将预制空心楼板吊装并插入楼板安装凹槽即可初步就位，大大简化了传统的现场支模、布置钢筋等复杂工序，降低了对现场操作人员技术的过度依赖，减少了对位不准需要反复调整的问题，因此，本实用新型能够保障连接结构的稳固性，优化施工的便捷性。
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Figure CN224902412U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building technology, and more specifically, to a connection structure between a precast hollow floor slab and a PC exterior wall. Background Technology
[0002] With the rapid development of industrialized construction, precast concrete structures have been widely used due to their advantages such as high construction efficiency and easy control of engineering quality. However, the connection between precast hollow floor slabs and PC exterior walls has always been one of the key technical challenges restricting the overall performance of prefabricated buildings. Traditional connection methods, such as angle steel connections, are not only inefficient to install, but also difficult to guarantee the stability of the connection. They often require a lot of on-site wet work, such as formwork and concrete pouring, which not only increases the complexity and duration of construction, but also makes it impossible to guarantee the stability of the connection.
[0003] Therefore, this utility model provides a connection structure between precast hollow floor slabs and PC exterior walls, which can ensure the stability of the connection structure and optimize the convenience of construction. Utility Model Content
[0004] To overcome the shortcomings of existing technologies, this utility model provides a connection structure between precast hollow floor slabs and PC exterior walls, which can ensure the stability of the connection structure and optimize the convenience of construction.
[0005] The technical solution adopted by this utility model to solve its technical problem is: a connection structure between a precast hollow floor slab and a PC exterior wall, the improvement of which is that it includes a first PC precast slab, a second PC precast slab, a first connecting steel bar, a sealing element, and a hollow floor slab; the connecting steel bar is fixedly connected between the bottom of the first PC precast slab and the top of the second PC precast slab; the sealing element is disposed in the gap between the first PC precast slab and the second PC precast slab; one end of the second PC precast slab is provided with a floor slab installation groove for assembling the hollow floor slab and the second PC precast slab; the end of the hollow floor slab near the second PC precast slab is provided with a floor slab end concrete structure and anchoring steel bars, and the hollow floor slab is inserted horizontally into the floor slab installation groove through the floor slab end concrete structure; the floor slab end concrete structure includes concrete protrusions and concrete grooves, and the concrete protrusions and concrete grooves are staggered at the end of the hollow floor slab; the anchoring steel bars are fixedly installed at the end of the concrete protrusions, and the concrete in the floor slab installation groove is poured along the concrete groove.
[0006] In the above structure, the sealing element includes weather-resistant adhesive, foam rod, and water-swellable adhesive strip; the weather-resistant adhesive, foam rod, and water-swellable adhesive strip are all filled in the gap between the first PC precast panel and the second PC precast panel.
[0007] In the above structure, the connection structure between the precast hollow floor slab and the PC exterior wall also includes embedded bolts and L-shaped brackets; the embedded bolts pass horizontally through the vertical section of the L-shaped brackets and are inserted into the second PC precast slab, and the embedded bolts are close to the bottom of the floor slab mounting groove; the horizontal section of the L-shaped brackets is flush with the bottom of the floor slab mounting groove.
[0008] In the above structure, the connection structure between the precast hollow floor slab and the PC exterior wall also includes a second connecting steel bar, which passes laterally through the second precast PC slab and is close to the anchoring steel bar.
[0009] In the above structure, the top of the hollow floor slab is provided with slab reinforcement, steel truss and top concrete of the floor slab; the slab reinforcement is fixedly installed on the top of the hollow floor slab for shear resistance; the steel truss is fixedly installed on the top of the slab reinforcement; the top concrete of the floor slab is poured along the top of the steel truss.
[0010] In the above structure, both the first PC precast panel and the second PC precast panel are provided with a thermal insulation layer, the thickness of which is between 30mm and 50mm.
[0011] In the above structure, shear-resistant steel plates are embedded inside both the first PC precast panel and the second PC precast panel, and the shear-resistant steel plates are close to the thermal insulation layer.
[0012] In the above structure, the first precast PC slab is also provided with a grouting hole for grouting and sealing. One end of the grouting hole is located on the side of the first precast PC slab close to the hollow floor slab, and the other end is located at the connection between the first precast PC slab and the second precast PC slab. One end of the first connecting steel bar is located in the grouting hole.
[0013] In the above structure, the diameter of the first connecting steel bar is between 20mm and 25mm, and the length is between 800mm and 1000mm.
[0014] The beneficial effects of this utility model are as follows: By designing the concrete structure at the end of the floor slab as a structure composed of staggered concrete protrusions and grooves, when the hollow floor slab is installed by inserting the concrete structure at the end of the floor slab into the installation groove, the concrete in the installation groove is poured, so that the concrete structure at the end of the precast floor slab and the concrete in the installation groove are interlocked, providing mechanical interlocking and shear resistance for the connection between the two. Furthermore, anchoring steel bars are fixedly installed at the ends of the concrete protrusions. After the concrete in the installation groove is poured, the concrete in the installation groove will completely enclose the anchoring steel bars. Anchoring ensures that the load of the hollow core slab can be reliably transferred to the PC exterior wall through the anchoring steel bars. Simultaneously, the first and second precast PC slabs are firmly connected by the first connecting steel bars, guaranteeing the stability of the vertical structural connection. Furthermore, during construction, the connection structure of this invention only requires hoisting the precast hollow core slab and inserting it into the slab installation groove for initial positioning, greatly simplifying the complex procedures of traditional on-site formwork and steel bar placement. This reduces excessive reliance on the skills of on-site operators and minimizes the need for repeated adjustments due to misalignment. Therefore, this invention ensures the stability of the connection structure and optimizes construction convenience. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of the connection structure between a precast hollow floor slab and a PC exterior wall according to the present invention. Detailed Implementation
[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0017] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.
[0018] This utility model discloses a connection structure between a precast hollow floor slab and a precast PC exterior wall, including a first precast PC slab 1, a second precast PC slab 2, a first connecting steel bar 4, a sealing element, and a hollow floor slab 3; the connecting steel bar is fixedly connected between the bottom of the first precast PC slab 1 and the top of the second precast PC slab 2; the sealing element is disposed in the gap between the first precast PC slab 1 and the second precast PC slab 2; one end of the second precast PC slab 2 is provided with a floor slab installation groove for assembling the hollow floor slab 3 and the second precast PC slab 2; one end of the hollow floor slab 3 near the second precast PC slab 2 is provided with a floor slab end concrete structure 11 and an anchoring steel bar 12, and the hollow floor slab 3 is inserted horizontally into the floor slab installation groove through the floor slab end concrete structure 11; the floor slab end concrete structure 11 includes concrete protrusions and concrete grooves, and the concrete protrusions and concrete grooves are staggered at the end of the hollow floor slab 3; the anchoring steel bar 12 is fixedly installed at the end of the concrete protrusions, and the concrete in the floor slab installation groove is poured along the concrete groove.
[0019] It should be noted that, in this embodiment, the first precast PC slab 1 and the second precast PC slab 2 serve as the main structures of the PC exterior walls of the upper and lower floors, respectively. They are fixedly connected by a first connecting steel bar 4 to ensure the continuity of the vertical load-bearing and force transmission of the PC exterior wall. Preferably, the diameter of the first connecting steel bar 4 is between 20mm and 800mm. In other embodiments, the diameter of the first connecting steel bar 4 can be any value between 20mm and 25mm, and the length can be any value between 800mm and 1000mm. The sealing element is used to seal the gap between the first precast PC slab 1 and the second precast PC slab 2 to prevent… Rainwater and air permeability ensure the durability of the entire connection structure. The hollow floor slab 3 is horizontally inserted into the floor slab installation groove through the concrete structure 11 at the end of the floor slab, and concrete is poured into the interior of the floor slab installation groove through the concrete groove of the concrete structure 11 at the end of the floor slab to achieve a fixed connection between the two. Anchor steel bars 12 are fixedly installed at the ends of the concrete protrusions. The concrete poured into the floor slab installation groove completely encloses and anchors the anchor steel bars 12, allowing the load of the hollow floor slab 3 to be reliably transferred to the PC exterior wall through the anchor steel bars 12. In the specific implementation of this utility model, the connection structure between the precast hollow floor slab and the PC exterior wall... By designing the concrete structure 11 at the end of the floor slab as a structure composed of staggered concrete protrusions and grooves, when the hollow floor slab 3 is installed by inserting the concrete structure 11 into the floor slab installation groove, the concrete in the floor slab installation groove is poured, so that the precast floor slab end concrete structure 11 and the concrete in the floor slab installation groove are interlocked, providing mechanical interlocking and shear resistance for the connection between the two. Anchor bars 12 are fixedly installed at the ends of the concrete protrusions. After the concrete in the floor slab installation groove is poured, the concrete in the floor slab installation groove will completely enclose and anchor the anchor bars 12, thus ensuring the hollow floor slab is properly connected. The load of the core floor slab 3 can be reliably transferred to the PC exterior wall through the anchoring steel bars 12. At the same time, the first PC precast slab 1 and the second PC precast slab 2 are firmly tied together by the first connecting steel bars 4, ensuring the stability of the vertical structural connection. In addition, during construction, the connection structure of this embodiment only requires hoisting the precast hollow floor slab 3 and inserting it into the floor slab installation groove for initial positioning, which greatly simplifies the complex procedures of traditional on-site formwork and steel bar arrangement, reduces the over-reliance on the skills of on-site operators, and reduces the problem of repeated adjustments due to inaccurate positioning. Therefore, this embodiment can ensure the stability of the connection structure and optimize the convenience of construction.
[0020] Continue to refer to Figure 1 As shown, the sealing element includes weather-resistant adhesive 8, foam rod 7, and water-swellable adhesive strip 6; the weather-resistant adhesive 8, foam rod 7, and water-swellable adhesive strip 6 are all filled in the gap between the first PC precast panel 1 and the second PC precast panel 2.
[0021] It should be noted that in this embodiment, the weather-resistant adhesive 8 serves as the main waterproof layer, continuously resisting daily wind, rain, ultraviolet rays, and the expansion and contraction of the joints due to its weather resistance and elasticity; the foam rod 7 serves as a backing material, its main function being to control the embedding depth and shape of the weather-resistant adhesive 8, ensuring the formation of an ideal adhesive joint, while also saving the amount of weather-resistant adhesive 8 used; the water-swellable adhesive strip 6 can quickly absorb water and expand several times in volume, actively pressing and blocking the seepage channels, achieving the effect of "waterproofing with water" when water accidentally breaks through the first two lines of defense.
[0022] Continue to refer to Figure 1 As shown, the connection structure between the precast hollow floor slab and the PC exterior wall also includes embedded bolts 13 and L-shaped brackets 14; the embedded bolts 13 pass horizontally through the vertical section of the L-shaped brackets 14 and are inserted into the second PC precast slab 2, and the embedded bolts 13 are close to the bottom of the floor slab mounting groove; the horizontal section of the L-shaped brackets 14 is flush with the bottom of the floor slab mounting groove.
[0023] It should be noted that in this embodiment, the L-shaped bracket 14 is fixedly connected to the second PC precast slab 2 by pre-embedded bolts 13, which is used to provide immediate vertical support and precise positioning for the hollow floor slab 3, so as to optimize the convenience of construction.
[0024] Continue to refer to Figure 1 As shown, the connection structure between the precast hollow floor slab and the PC exterior wall also includes a second connecting steel bar 5, which passes laterally through the second PC precast slab 2 and is close to the anchoring steel bar 12.
[0025] It should be noted that in this embodiment, the second connecting steel bar 5 passes through the second precast PC slab 2 laterally to reinforce the connection between the concrete structure 11 at the end of the floor slab and the floor slab installation groove, thereby further ensuring the stability of the connection structure.
[0026] Continue to refer to Figure 1 As shown, the top of the hollow floor slab 3 is provided with slab reinforcement 9, steel truss 10 and floor slab top concrete; the slab reinforcement 9 is fixedly installed on the top of the hollow floor slab 3 for shear resistance; the steel truss 10 is fixedly installed on the top of the slab reinforcement 9; the floor slab top concrete is poured along the top of the steel truss 10.
[0027] It should be noted that, in this embodiment, the slab reinforcement 9 is laid on top of the precast hollow floor slab 3 to bear the shear force in the hollow floor slab 3 and to provide bonding force between the hollow floor slab 3 and the concrete structure 11 at the end of the floor slab, preventing slippage between the two when under stress; the steel truss 10 is fixed on the slab reinforcement 9, and it serves as a skeleton to support the concrete on the top surface of the floor slab, thereby improving the stiffness and bending resistance of the hollow floor slab 3.
[0028] Continue to refer to Figure 1 As shown, both the first PC precast panel 1 and the second PC precast panel 2 are provided with a thermal insulation layer 16 inside.
[0029] It should be noted that, in this embodiment, the thermal insulation layer 16 is designed to reduce heat transfer between indoors and outdoors, thereby maintaining a stable indoor temperature, reducing energy consumption for heating or cooling, and improving building energy efficiency and living comfort; preferably, the thickness of the thermal insulation layer 16 is 40mm, and in other embodiments, the thickness of the thermal insulation layer 16 can be any value between 30mm and 50mm.
[0030] Both the first PC precast panel 1 and the second PC precast panel 2 have shear-resistant steel plates 17 embedded inside, and the shear-resistant steel plates 17 are close to the thermal insulation layer 16.
[0031] It should be noted that in this embodiment, the first PC precast panel 1 and the second PC precast panel 2 use the rigidity of the shear-resistant steel plate 17 to resist horizontal shear force, thereby preventing the thermal insulation layer 16 from being damaged when subjected to force.
[0032] The first precast PC slab 1 is also provided with a grouting hole 15 for grouting and sealing. One end of the grouting hole 15 is located on the side of the first precast PC slab 1 close to the hollow floor slab 3, and the other end is located at the connection between the first precast PC slab 1 and the second precast PC slab 2. One end of the first connecting steel bar 4 is located in the grouting hole 15.
[0033] It should be noted that, in this embodiment, the grouting hole 15 is used to inject high-strength, non-shrink cement-based grout, which hardens in the hole and wraps around and anchors the end of the first connecting steel bar 4, thereby achieving a reliable connection between the first PC precast slab 1 and the second PC precast slab 2, and also playing a further sealing role.
[0034] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.
Claims
1. A connection structure between a precast hollow floor slab and a PC exterior wall, characterized in that, The system includes a first precast PC slab, a second precast PC slab, a first connecting reinforcing bar, a sealing element, and a hollow floor slab. The connecting reinforcing bar is fixedly connected between the bottom of the first precast PC slab and the top of the second precast PC slab. The sealing element is disposed in the gap between the first and second precast PC slabs. One end of the second precast PC slab is provided with a floor slab installation groove for assembling the hollow floor slab and the second precast PC slab. The end of the hollow floor slab near the second precast PC slab is provided with a floor slab end concrete structure and anchoring reinforcing bars, and the hollow floor slab is inserted horizontally into the floor slab installation groove through the floor slab end concrete structure. The floor slab end concrete structure includes concrete protrusions and concrete grooves, and the concrete protrusions and concrete grooves are staggered at the end of the hollow floor slab. The anchoring reinforcing bars are fixedly installed at the end of the concrete protrusions, and the concrete in the floor slab installation groove is poured along the concrete groove.
2. The connection structure between a precast hollow floor slab and a PC exterior wall according to claim 1, characterized in that, The sealing element includes weather-resistant adhesive, foam rod, and water-swellable adhesive strip; the weather-resistant adhesive, foam rod, and water-swellable adhesive strip are all filled in the gap between the first PC precast panel and the second PC precast panel.
3. The connection structure between a precast hollow floor slab and a PC exterior wall according to claim 1, characterized in that, The connection structure between the precast hollow floor slab and the PC exterior wall also includes embedded bolts and L-shaped brackets; the embedded bolts pass horizontally through the vertical section of the L-shaped brackets and are inserted into the second PC precast slab, and the embedded bolts are close to the bottom of the floor slab mounting groove; the horizontal section of the L-shaped brackets is flush with the bottom of the floor slab mounting groove.
4. The connection structure between a precast hollow floor slab and a PC exterior wall according to claim 1, characterized in that, The connection structure between the precast hollow floor slab and the PC exterior wall also includes a second connecting steel bar, which passes laterally through the second precast PC slab and is close to the anchoring steel bar.
5. The connection structure between a precast hollow floor slab and a PC exterior wall according to claim 1, characterized in that, The hollow floor slab is provided with slab reinforcement, steel truss and top concrete; the slab reinforcement is fixedly installed on the top of the hollow floor slab for shear resistance; the steel truss is fixedly installed on the top of the slab reinforcement; the top concrete is poured along the top of the steel truss.
6. The connection structure between a precast hollow floor slab and a PC exterior wall according to claim 1, characterized in that, Both the first and second precast PC panels have internal thermal insulation layers, the thickness of which is between 30mm and 50mm.
7. The connection structure between a precast hollow floor slab and a PC exterior wall according to claim 6, characterized in that, Both the first and second precast PC panels have shear-resistant steel plates embedded inside, and the shear-resistant steel plates are close to the thermal insulation layer.
8. The connection structure between a precast hollow floor slab and a PC exterior wall according to claim 1, characterized in that, The first precast PC slab is also provided with a grouting hole for grouting and sealing. One end of the grouting hole is located on the side of the first precast PC slab close to the hollow floor slab, and the other end is located at the connection between the first precast PC slab and the second precast PC slab. One end of the first connecting steel bar is located in the grouting hole.
9. The connection structure between a precast hollow floor slab and a PC exterior wall according to claim 8, characterized in that, The diameter of the first connecting steel bar is between 20mm and 25mm, and the length is between 800mm and 1000mm.