Construction method of fabricated energy-saving and noise-reducing cavity floor cover plate

Abstract

The invention relates to the technical field of main body structure construction, aims to solve the problems that an existing cavity floor cover plate is low in construction efficiency, complex in line pipe embedding and poor in sound insulation and noise reduction effect, and provides a construction method of an assembly type energy-saving and noise-reduction cavity floor cover plate, and the construction method comprises the steps that S1, a bottom plate and a cavity cover plate of the cavity floor cover plate are optimally designed according to a design drawing; s2, a bottom plate and a cavity cover plate are produced in a factory according to the step S1; s3, a formwork support is erected; s4, the formwork and the bottom plate are installed on site; s5, mounting a cavity cover plate on site; s6, multi-ribbed beam steel bars are bound in grid spaces formed among all the cavity cover plates, the multi-ribbed beam steel bars and the bottom plate reserved steel bars are bound and fixed, top plate steel bars are bound on the top faces of the cavity cover plates, and the top plate steel bars and the multi-ribbed beam steel bars are bound and fixed; s7, concrete is poured into grid spaces formed among all the cavity cover plates and the top faces of the cavity cover plates, and dense rib beams and a top plate are formed; the construction efficiency is high, and the sound insulation and noise reduction effects are good.

Description

Technical Field

[0001] This invention relates to the field of main structure construction technology, and more specifically, to a construction method for prefabricated energy-saving and noise-reducing cavity floor slabs. Background Technology

[0002] With the acceleration of urbanization and the improvement of residents' living standards, the functional requirements of buildings have shifted from "basic living" to "comfort, efficiency, and economy." At the same time, the construction industry faces the development orientation of "energy conservation and emission reduction, quality improvement and efficiency enhancement." Against this backdrop, the technical bottlenecks and performance shortcomings of traditional solid floor slabs have become increasingly prominent, specifically manifested in: excessive self-weight leading to increased structural burden, low material utilization resulting in resource waste, and inability to meet sound insulation and heat insulation requirements. These industry pain points and market demands have provided fertile ground for the promotion of hollow cavity floor slabs.

[0003] Currently, the most common methods for constructing hollow floor slabs in the construction industry are exposed-box laminated ribbed hollow slabs and concealed-box ribbed hollow slabs. However, these methods have several drawbacks during construction, as follows: 1. Each base slab of the hollow floor slab has a broken ribbed beam. After the workers set up the formwork according to the drawings, they need to mark the lines on the formwork and stick double-sided tape (to prevent grout leakage) before the base slab of the hollow floor slab can be laid. The construction efficiency is low and there is a risk of grout leakage due to the failure to apply double-sided tape, which affects the appearance of the bottom surface. 2. A magnesium oxide board needs to be installed between the bottom slab and the top slab of the cavity floor slab to support the top slab. Since the magnesium oxide board is cut and disassembled on-site by workers according to the site requirements, the construction efficiency is slow. After cutting, it also needs to be fixed to the bottom slab of the cavity floor slab before the top slab can be laid, which also slows down the installation efficiency. 3. The construction of the embedded conduit in the slab is relatively complicated and difficult. Since the bottom plate of the cavity floor slab will have a pre-embedded junction box, the conventional construction will pass the conduit through the glass magnesium board and then connect the junction box. Passing the conduit through the glass magnesium board requires the glass magnesium board to be perforated and then the hole repaired. The process is complicated and there is a risk of grout leakage. 4. Traditional hollow floor slabs are hollow in the middle, so their sound insulation and vibration reduction effects are not very good. In addition, since the thickness of hollow floor slabs is 30-50mm, they are prone to damage during transportation and construction. In the later use by the owner, they are weak in load-bearing capacity and difficult to repair if damaged. Summary of the Invention

[0004] The present invention aims to provide a construction method for prefabricated energy-saving and noise-reducing cavity floor slabs to solve the problems of low construction efficiency, complex pre-embedded conduits, and poor sound insulation and noise reduction effect of existing cavity floor slabs.

[0005] This invention is achieved using the following technical solution: This invention provides a construction method for prefabricated energy-saving and noise-reducing cavity floor slabs, comprising the following steps: S1: Based on the structural design drawings of the cavity floor slab, optimize the design of the bottom plate and the cavity cover plate of the cavity floor slab; Step S1 specifically includes: S101: Optimized base plate design; The base plate is designed as a standard part and a non-standard part. The standard part is just the base plate, and the non-standard part is the base plate with a junction box. Design a convex tongue and groove joint on the base plate; S102: Optimized design of cavity cover plate; A honeycomb panel is designed inside the cavity of the cavity cover plate; A concave tongue and groove is designed on the cavity cover plate so that the concave tongue and groove on the cavity cover plate can match the convex tongue and groove on the base plate, so that the concave tongue and groove can fit together perfectly. Design junction boxes on some cavity cover plates; S2: Produce the base plate and cavity cover plate in the factory according to step S1; S3: Erect formwork; S4: On-site installation of templates and base plates; Step S4 specifically includes: S401: Lay the template on the formwork support; S402: Lay each base plate on the template in sequence, and during the laying of the base plates, set expansion strips between the base plates; S5: On-site installation of cavity cover plate and conduit; Install each cavity cover plate on the corresponding base plate. During installation, ensure that the concave tongue and groove on the cavity cover plate is exactly above the convex tongue and groove on the base plate, so that the concave tongue and groove are precisely engaged with the convex tongue and groove. When installing the cavity cover plate with junction box, install it correspondingly to the base plate with junction box, pass the conduit through the mounting hole on the junction box of the cavity cover plate, and connect it with the junction box on the base plate. S6: Tie the ribbed beam reinforcement in the grid space formed between all the cavity cover plates, and tie the ribbed beam reinforcement to the reserved reinforcement of the bottom plate. Tie the top plate reinforcement on the top surface of the cavity cover plate, and tie the top plate reinforcement to the ribbed beam reinforcement. S7: Concrete is poured into the grid space formed between all the cavity cover plates and on the top surface of the cavity cover plates to form ribbed beams and a top plate.

[0006] As a preferred technical solution: Step S101 also includes: Optimize and determine the layout of the junction boxes, and determine the installation location and quantity of the base plate with the junction boxes.

[0007] As a preferred technical solution: Step S102 also includes: Based on the design load and stress performance requirements of the cavity cover plate, the arrangement position of the honeycomb panels in the cavity and the size of the honeycomb cells are optimized and determined through finite element analysis.

[0008] As a preferred technical solution: Step S102 also includes: For cavity covers with junction boxes, a reinforcing structure is added above the junction box in the cavity cover.

[0009] As a preferred technical solution: In step S2, during the production of the cavity cover plate, fireproof and soundproof cotton is filled into the cavity of the cavity cover plate.

[0010] As a preferred technical solution: Step S3: Before erecting the formwork, use BIM technology to model the formwork and perform detailed design on the formwork. Then export the detailed drawings and erect the formwork on site according to the detailed drawings.

[0011] As a preferred technical solution: The junction box is installed on the base plate and cavity cover plate by pre-embedding.

[0012] As a preferred technical solution: Before laying the base plate and cavity cover plate, number each base plate and cavity cover plate, and then lay them in sequence.

[0013] As a preferred technical solution: In step S5, the conduit is passed through the upper part of the cavity cover plate and through the mounting hole on the junction box in the cavity cover plate, and is connected to the conduit interface of the junction box on the bottom plate. The conduit is used for threading wires and is fixed by the top plate reinforcement.

[0014] As a preferred technical solution: For unused conduits, seal the ends with sealing caps.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. Compared with traditional construction methods, the hollow floor slab of this invention is manufactured in a factory for both the base plate and the cavity cover plate, and installed directly on site, achieving prefabricated construction. Furthermore, this invention features a convex tongue-and-groove joint on the base plate and a concave tongue-and-groove joint on the cavity cover plate. This combination of convex and concave tongue-and-groove joints not only speeds up the installation of the cavity cover plate but also ensures its installation accuracy. This invention eliminates the need for existing magnesium oxide boards, reducing the need for on-site cutting and reducing construction steps. The optimized design of the base plate and cavity cover plate, with pre-installed junction boxes, optimizes pipeline routing and facilitates conduit pre-embedding. It eliminates the need for drilling holes in the existing magnesium oxide boards, which reduces the structural strength of the hollow floor slab, and also eliminates the need for hole repair, simplifying procedures, improving construction efficiency, and preventing grout leakage. These methods significantly improve the construction efficiency of the hollow floor slab and ensure its structural stability. Factory batch processing also reduces costs.

[0016] 2. This invention incorporates a honeycomb panel within the cavity of the cavity cover plate. The honeycomb panel increases the vertical structural strength and enhances the building's sound insulation and noise reduction performance. The multi-cavity structure of the honeycomb panel dissipates sound waves. The honeycomb structure possesses high rigidity and low modulus, effectively dispersing and absorbing structural vibration energy. When vibration waves propagate between the cell walls of the honeycomb core, the elastic deformation of the cell walls dissipates the vibration energy, preventing vibration from being transmitted through the panel to the building interior and forming secondary noise. The honeycomb panel, in conjunction with fireproof sound insulation cotton, the cavity cover plate, and the base plate, forms a multi-level sound insulation system, effectively improving the sound insulation and noise reduction effect.

[0017] 3. The cavity cover plate of the present invention has a relatively thick overall thickness, making it less prone to damage during transportation and construction.

[0018] 4. The present invention fully lays the base plate on the template and installs expansion foam strips between two adjacent base plates, which can effectively prevent grout leakage.

[0019] 5. This invention is simple and quick to install on site, making it easy for workers to implement, and the molding effect is good after the casting is completed. Attached Figure Description

[0020] Figure 1 This is a flowchart of the construction method for the prefabricated energy-saving and noise-reducing cavity floor slab described in this invention.

[0021] Figure 2 This is a schematic diagram of the laying of the base plate described in this invention.

[0022] Figure 3 This is a schematic diagram of the installation of the cavity cover plate according to the present invention.

[0023] Figure 4 This is a schematic diagram of the laying of the ribbed beam reinforcement according to the present invention.

[0024] Figure 5 This is a cross-sectional view of the prefabricated energy-saving and noise-reducing cavity floor slab described in this invention.

[0025] Figure 6 This is a schematic diagram of the cavity cover plate described in this invention.

[0026] Figure 7 This is a cross-sectional view of the cavity cover plate described in this invention.

[0027] Figure 8 This is a schematic diagram of the cavity cover plate of the junction box according to the present invention.

[0028] Figure 9 This is a cross-sectional view of the cavity cover plate of the junction box according to the present invention.

[0029] Figure 10 This is a schematic diagram of the structure of the base plate described in this invention.

[0030] Figure 11 This is a cross-sectional view of the base plate described in this invention.

[0031] Figure 12 This is a schematic diagram of the structure of the base plate with the junction box described in this invention.

[0032] Figure 13 This is a cross-sectional view of the base plate of the junction box according to the present invention.

[0033] Icons: 1-Base plate, 2-Cavity cover plate, 3-Jack box, 4-Honeycomb panel, 5-T-groove joint, 6-Groove, 7-Fireproof and soundproof cotton, 8-Expanding foam strip, 9-Ribboned beam reinforcement, 10-Top plate, 11-Base plate reserved reinforcement, 12-Conduit. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1 like Figures 1-13 As shown in the figure, this embodiment proposes a construction method for prefabricated energy-saving and noise-reducing cavity floor slabs, including the following steps: S1: Based on the structural design drawing of the cavity floor slab, optimize the design of the bottom plate 1 and the cavity cover plate 2 of the cavity floor slab.

[0036] Step S1 specifically includes: S101: Optimized design of base plate 1; The base plate 1 is designed as a standard part and a non-standard part. The standard part is only the base plate 1, and the non-standard part is the base plate 1 with a junction box 3. The junction box 3 is pre-embedded on the base plate 1. A convex tongue and groove 5 is designed on the base plate 1 to facilitate the precise positioning and installation of the cavity cover plate 2; Based on the project structural design, the layout of junction box 3 is optimized and determined, and the installation position and quantity of the base plate 1 with junction box 3 are determined to guide factory processing and on-site construction. S102: Optimized design of cavity cover plate 2; A honeycomb plate 4 is designed in the cavity of the cavity cover plate 2, and a honeycomb structure is formed in the cavity cover plate 2 through the honeycomb plate 4; Based on the design load and stress performance requirements of the cavity cover plate 2, the arrangement position of the honeycomb plate 4 in the cavity of the cavity cover plate 2 and the size of the honeycomb cavity grid are optimized and determined through finite element analysis. A concave tongue and groove is designed on the cavity cover plate 2 so that the concave tongue and groove on the cavity cover plate 2 can be matched with the convex tongue and groove 5 on the base plate 1, so that the concave tongue and groove can be engaged with the convex tongue and groove 5. According to the design drawings, junction boxes 3 are designed on part of the cavity cover plate 2. The junction boxes 3 are pre-embedded in the cavity cover plate 2. For the cavity cover plate 2 with junction boxes 3, a reinforcing structure is added above the junction boxes 3 in the cavity cover plate 2, such as steel bars or mesh, to prevent damage during later installation.

[0037] S2: Produce base plate 1 and cavity cover plate 2 in the factory according to step S1.

[0038] When producing the cavity cover plate 2, fireproof and soundproof cotton 7 is filled into the cavity of the cavity cover plate 2. Specifically, the fireproof and soundproof cotton 7 can be filled into the honeycomb cavity of the honeycomb board 4.

[0039] S3: Erect formwork.

[0040] Before erecting the formwork, BIM technology can be used to model the formwork and conduct detailed design, then export detailed drawings, and erect the formwork on site according to the detailed drawings.

[0041] S4: On-site installation of templates and base plate 1.

[0042] Step S4 specifically includes: S401: Lay the template on the formwork support; S402: Number each base plate 1, and then lay each base plate 1 on the template in sequence. During the laying of the base plate 1, set expansion foam strips 8 between the base plates 1 to prevent grout leakage. S5: Install cavity cover plate 2 and conduit 12 on site.

[0043] Step S5 specifically includes: Number each cavity cover plate 2, and then install each cavity cover plate 2 on the corresponding base plate 1. During installation, ensure that the concave tongue and groove on the cavity cover plate 2 is exactly above the convex tongue and groove 5 on the base plate 1, so that the concave tongue and groove is exactly engaged with the convex tongue and groove 5.

[0044] The cavity cover plate 2 with junction box 3 has a junction box 3 built in, so there is no need to install a separate junction box 3. When installing the cavity cover plate 2 with junction box 3, install it in correspondence with the base plate 1 with junction box 3, pass the conduit 12 through the mounting hole on the junction box 3 of the cavity cover plate 2, and connect it with the junction box 3 on the base plate 1.

[0045] S6: According to the design drawing, tie the ribbed beam steel bars 9 in the grid space formed between all the cavity cover plates 2, and tie the ribbed beam steel bars 9 to the reserved steel bars 11 in the bottom plate. Tie the top plate steel bars on the top surface of the cavity cover plate 2, and tie the top plate steel bars to the ribbed beam steel bars 9.

[0046] S7: Concrete is poured into the grid space formed between all the cavity cover plates 2 and on the top surface of the cavity cover plates 2 to form a ribbed beam and a top plate 10.

[0047] The above steps are used to obtain prefabricated energy-saving and noise-reducing cavity floor slabs.

[0048] Preferably, the cavity cover plate 2 can be made of a polymer material with good compressive strength.

[0049] Preferably, the conduit 12 passes through the upper part of the cavity cover plate 2 and through the mounting hole on the junction box 3 in the cavity cover plate 2, and is connected to the conduit interface of the junction box 3 on the base plate 1. Wiring can be threaded through the conduit 12. For unused conduits 12, a sealing cap is installed at the end of the conduit 12 to seal it and prevent concrete slurry from flowing in. The conduit 12 is fixed by the top plate reinforcement to prevent displacement. The conduit 12 can be JDG pipe, and the gap between the conduit 12 and the cavity cover plate 2 can be sealed with glue, but is not limited to, using glue for fixing the conduit 12.

[0050] Preferably, the honeycomb panel 4 and the cavity cover plate 2 are fixedly connected.

[0051] Preferably, the honeycomb panel 4 may be, but is not limited to, made of fire-resistant rigid polymer materials, such as flame-retardant polyvinyl chloride (PVC).

[0052] Preferably, the ribbed beam reinforcement 9 uses stirrups.

[0053] Preferably, a groove 6 is provided on the side of the base plate 1, which can provide installation space for the expanded foam strip 8.

[0054] Preferably, conduit 12 is an electromechanical conduit.

[0055] Compared with traditional construction methods, the hollow floor slab of this invention has both its base plate 1 and hollow cover plate 2 manufactured in the factory and installed directly on site, achieving prefabricated construction. Furthermore, this invention features a convex tongue-and-groove joint 5 on the base plate 1 and a concave tongue-and-groove joint on the hollow cover plate 2. The combination of the concave and convex tongue-and-groove joints 5 not only speeds up the installation of the hollow cover plate 2 but also ensures its installation accuracy. This invention eliminates the need for existing magnesium oxide boards, reducing the need for on-site cutting and reducing construction steps. The invention optimizes the design of the base plate 1 and hollow cover plate 2 by pre-installing junction boxes 3 on both, optimizing pipeline routing and facilitating the pre-embedding of conduits 12. It eliminates the need for drilling holes in the existing magnesium oxide boards, which reduces the structural strength of the hollow floor slab, and also eliminates the need for hole repair, simplifying the process and improving construction efficiency. All these methods significantly improve the construction efficiency of the hollow floor slab and ensure its structural stability. Factory batch processing also reduces costs.

[0056] In this invention, a honeycomb panel 4 is provided in the cavity of the cavity cover plate 2. The honeycomb panel 4 can increase the vertical structural stress and improve the sound insulation and noise reduction performance of the building. The multi-cavity structure of the honeycomb panel 4 can dissipate sound waves. The honeycomb structure has the characteristics of high rigidity and low modulus, which can effectively disperse and absorb structural vibration energy. When the vibration wave is transmitted between the grid walls of the honeycomb core, the vibration energy will be consumed by the elastic deformation of the grid walls, thus preventing the vibration from being transmitted to the interior of the building through the panel and forming secondary noise. The honeycomb panel 4, together with the fireproof sound insulation cotton 7, the cavity cover plate 2, and the bottom plate 1, forms a multi-level sound insulation system, which effectively improves the sound insulation and noise reduction effect.

[0057] The cavity cover plate 2 of the present invention has a relatively thick overall thickness, making it less prone to damage during transportation and construction.

[0058] The present invention lays the base plate 1 on the template and installs expansion foam strips 8 between two adjacent base plates 1, which can effectively prevent grout leakage.

[0059] This invention is simple and quick to install on site, making it easy for workers to implement, and it produces good molding results after pouring.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A construction method for a prefabricated energy-saving and noise-reducing cavity floor slab, characterized in that: Includes the following steps: S1: Based on the structural design drawings of the cavity floor slab, optimize the design of the bottom plate and the cavity cover plate of the cavity floor slab; Step S1 specifically includes: S101: Optimized base plate design; The base plate is designed as a standard part and a non-standard part. The standard part is just the base plate, and the non-standard part is the base plate with a junction box. Design a convex tongue and groove joint on the base plate; S102: Optimized design of cavity cover plate; A honeycomb panel is designed inside the cavity of the cavity cover plate; A concave tongue and groove is designed on the cavity cover plate so that the concave tongue and groove on the cavity cover plate can match the convex tongue and groove on the base plate, so that the concave tongue and groove can fit together perfectly. Design junction boxes on some cavity cover plates; S2: Produce the base plate and cavity cover plate in the factory according to step S1; S3: Erect formwork; S4: On-site installation of templates and base plates; Step S4 specifically includes: S401: Lay the template on the formwork support; S402: Lay each base plate on the template in sequence, and during the laying of the base plates, set expansion strips between the base plates; S5: On-site installation of cavity cover plate and conduit; Install each cavity cover plate on the corresponding base plate. During installation, ensure that the concave tongue and groove on the cavity cover plate is exactly above the convex tongue and groove on the base plate, so that the concave tongue and groove are precisely engaged with the convex tongue and groove. When installing the cavity cover plate with junction box, install it correspondingly to the base plate with junction box, pass the conduit through the mounting hole on the junction box of the cavity cover plate, and connect it with the junction box on the base plate. S6: Tie the ribbed beam reinforcement in the grid space formed between all the cavity cover plates, and tie the ribbed beam reinforcement to the reserved reinforcement of the bottom plate. Tie the top plate reinforcement on the top surface of the cavity cover plate, and tie the top plate reinforcement to the ribbed beam reinforcement. S7: Concrete is poured into the grid space formed between all the cavity cover plates and on the top surface of the cavity cover plates to form ribbed beams and a top plate.

2. The construction method of the prefabricated energy-saving and noise-reducing cavity floor slab according to claim 1, characterized in that: Step S101 also includes: Optimize and determine the layout of the junction boxes, and determine the installation location and quantity of the base plate with the junction boxes.

3. The construction method of the prefabricated energy-saving and noise-reducing cavity floor slab according to claim 1, characterized in that: Step S102 also includes: Based on the design load and stress performance requirements of the cavity cover plate, the arrangement position of the honeycomb panels in the cavity and the size of the honeycomb cells are optimized and determined through finite element analysis.

4. The construction method of the prefabricated energy-saving and noise-reducing cavity floor slab according to claim 1, characterized in that: Step S102 also includes: For cavity covers with junction boxes, a reinforcing structure is added above the junction box in the cavity cover.

5. The construction method of the prefabricated energy-saving and noise-reducing cavity floor slab according to claim 1, characterized in that: In step S2, during the production of the cavity cover plate, fireproof and soundproof cotton is filled into the cavity of the cavity cover plate.

6. The construction method of the prefabricated energy-saving and noise-reducing cavity floor slab according to claim 1, characterized in that: Step S3: Before erecting the formwork, use BIM technology to model the formwork and perform detailed design on the formwork. Then export the detailed drawings and erect the formwork on site according to the detailed drawings.

7. The construction method of the prefabricated energy-saving and noise-reducing cavity floor slab according to claim 1, characterized in that: The junction box is installed on the base plate and cavity cover plate by pre-embedding.

8. The construction method of the prefabricated energy-saving and noise-reducing cavity floor slab according to claim 1, characterized in that: Before laying the base plate and cavity cover plate, number each base plate and cavity cover plate, and then lay them in sequence.

9. The construction method of the prefabricated energy-saving and noise-reducing cavity floor slab according to claim 1, characterized in that: In step S5, the conduit is passed through the upper part of the cavity cover plate and through the mounting hole on the junction box in the cavity cover plate, and is connected to the conduit interface of the junction box on the bottom plate. The conduit is used for threading wires and is fixed by the top plate reinforcement.

10. The construction method of the prefabricated energy-saving and noise-reducing cavity floor slab according to claim 9, characterized in that: For unused conduits, seal the ends with sealing caps.

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