A new opening reinforcing structure for a large opening of a prefabricated hollow floor
By setting reinforcement plates and tie bolt structures on precast hollow floor slabs and injecting grout, the problems of large workload, high difficulty and high cost in the reinforcement construction of large openings are solved, and efficient and economical reinforcement effect is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA CONSTR EIGHTH BUREAU TIANJIN CONSTR ENG CO LTD
- Filing Date
- 2025-07-14
- Publication Date
- 2026-06-23
AI Technical Summary
Existing technologies for reinforcing precast hollow core slabs of old buildings with large openings present problems such as large construction workload, high difficulty and high cost, especially when the length and width of rectangular or round openings are 300mm to 1000mm, the safety factor of carbon fiber cloth reinforcement is relatively low.
A reinforcement plate and tie bolt structure are used to reinforce the area around the newly opened large opening. Grout is injected through the grouting holes on the top of the plate, and a stable reinforcement structure is formed by connecting the reinforcement plate and tie bolts, which reduces the construction difficulty and cost.
It achieves the goal of reducing the amount of construction work and difficulty, speeding up construction, and reducing construction costs while ensuring reliable and firm reinforcement, making it suitable for large-scale promotion and application.
Smart Images
Figure CN224396111U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building construction technology, and in particular to the field of new openings in existing precast hollow floor slabs, specifically referring to a reinforcement structure for opening larger openings in existing precast hollow floor slabs. Background Technology
[0002] Building construction refers to the production activities during the implementation phase of an engineering project. It is the process of building various types of structures, or the process of turning the lines on design drawings into a physical object at a designated location. It includes foundation construction, main structure construction, roofing construction, and decoration construction.
[0003] With the rapid development of my country's construction industry, many old houses are affected by environmental factors, and their safety performance can no longer meet the needs of modern production and life. These houses need to be reinforced and renovated.
[0004] During the renovation process, many old buildings have precast hollow core slabs. Depending on the pipeline layout, some of these slabs require openings. These openings disrupt the original force transmission path, increasing internal forces around the openings, causing stress concentration and reducing load-bearing capacity. Smaller openings can be reinforced with carbon fiber cloth, but for larger openings (e.g., rectangular openings with a length and width of 300mm to 1000mm, or circular openings with a diameter of 300mm to 1000mm), the safety factor for reinforcement with carbon fiber cloth is relatively low.
[0005] Therefore, there is a need for a reinforcement structure for newly opened large openings in existing precast hollow core slabs. This structure can reinforce the surrounding area of the newly opened large opening, ensuring reliable and firm reinforcement while reducing the amount of construction work and difficulty, accelerating construction speed, and reducing construction costs. Utility Model Content
[0006] In order to overcome the shortcomings of the prior art, one objective of this utility model is to provide a reinforcement structure for newly opened large openings in existing precast hollow floor slabs. This structure can reinforce the perimeter of the newly opened large opening, ensuring reliable and firm reinforcement while reducing the amount of construction work and difficulty, accelerating construction speed, and reducing construction costs, making it suitable for large-scale promotion and application.
[0007] To achieve the above objectives, this utility model provides a reinforcement structure for opening a larger opening in an existing precast hollow core slab. The structure includes an existing precast hollow core slab, which is horizontally arranged along the front-to-back direction. The structure further includes the newly opened larger opening, a grouting hole at the top of the slab, grouting material, upper left reinforcement plates, upper right reinforcement plates, lower left reinforcement plates, lower right reinforcement plates, upper front reinforcement plates, upper middle reinforcement plates, upper rear reinforcement plates, lower front reinforcement plates, lower middle reinforcement plates, lower rear reinforcement plates, left front tie bolts, left middle tie bolts, left rear tie bolts, right front tie bolts, right middle tie bolts, and right rear tie bolts.
[0008] The newly opened larger opening is vertically arranged in the existing precast hollow floor slab, and the grouting material injection hole on the top of the slab is vertically arranged in the top of the existing precast hollow floor slab and connected to the hollow channel of the existing precast hollow floor slab. The hollow channel is connected to the newly opened larger opening, and the grouting material is filled in the hollow channel.
[0009] The upper left and upper right reinforcing plates are both horizontally arranged along the front-to-back direction and spaced apart from each other on the top surface of the existing precast hollow floor slab. The lower left and lower right reinforcing plates are both horizontally arranged along the front-to-back direction and spaced apart from each other. The lower left and lower right reinforcing plates are both located below and connected to the bottom surface of the existing precast hollow floor slab. The upper left and lower left reinforcing plates, as well as the upper right and lower right reinforcing plates, are spaced apart vertically. The upper front, upper middle, and upper rear reinforcing plates are all horizontally arranged along the left-to-right direction and spaced apart from each other. The lower front, lower middle, and lower rear reinforcing plates are all horizontally arranged along the left-to-right direction and spaced apart from each other. The lower front reinforcement plate, the upper middle reinforcement plate, the lower middle reinforcement plate, the upper rear reinforcement plate, and the lower rear reinforcement plate are all arranged vertically at intervals. The upper front reinforcement plate, the upper middle reinforcement plate, and the upper rear reinforcement plate are respectively located on the upper left reinforcement plate, the top surface of the existing precast hollow floor slab, and the upper right reinforcement plate. The lower front reinforcement plate, the lower middle reinforcement plate, and the lower rear reinforcement plate are respectively located below the lower left reinforcement plate, the bottom surface of the existing precast hollow floor slab, and the lower right reinforcement plate, and are respectively connected to the lower left reinforcement plate, the bottom surface of the existing precast hollow floor slab, and the lower right reinforcement plate. The newly opened larger opening is located between the upper left reinforcement plate, the upper right reinforcement plate, the upper middle reinforcement plate, and the upper rear reinforcement plate. The grouting hole at the top of the slab is located between the upper left reinforcement plate, the upper right reinforcement plate, the upper front reinforcement plate, and the upper middle reinforcement plate.
[0010] The upper front reinforcement plate, the upper left reinforcement plate, the existing precast hollow floor slab, the lower left reinforcement plate, and the lower front reinforcement plate are vertically fixed by vertically arranged left front tie bolts. The upper middle reinforcement plate, the upper left reinforcement plate, the existing precast hollow floor slab, the lower left reinforcement plate, and the lower middle reinforcement plate are vertically fixed by vertically arranged left middle tie bolts. The upper rear reinforcement plate, the upper left reinforcement plate, the existing precast hollow floor slab, the lower left reinforcement plate, and the lower rear reinforcement plate are vertically fixed by vertically arranged left rear tie bolts. The upper front reinforcement plate, the upper right reinforcement plate, the existing precast hollow floor slab, the lower right reinforcement plate, and the lower front reinforcement plate are vertically fixed by vertically arranged right front tie bolts. The upper middle reinforcement plate, the upper right reinforcement plate, the existing precast hollow floor slab, the lower right reinforcement plate, and the lower middle reinforcement plate are vertically fixed by vertically arranged right middle tie bolts. The upper rear reinforcement plate, the upper right reinforcement plate, the existing precast hollow floor slab, the lower right reinforcement plate, and the lower rear reinforcement plate are vertically fixed by vertically arranged right rear tie bolts.
[0011] Preferably, the thickness of the existing precast hollow floor slab is 12cm.
[0012] Preferably, the newly opened larger opening is a rectangular or circular opening.
[0013] More preferably, the length and width of the rectangular hole or the diameter of the circular hole are both 300mm to 1000mm.
[0014] Preferably, the grouting hole on the top of the plate is a rectangular hole.
[0015] Preferably, the distance between the newly opened larger opening and the grouting hole on the top of the slab is 150mm.
[0016] Preferably, the upper left reinforcing plate, the upper right reinforcing plate, the lower left reinforcing plate, the lower right reinforcing plate, the upper front reinforcing plate, the upper middle reinforcing plate, the upper rear reinforcing plate, the lower front reinforcing plate, the lower middle reinforcing plate, and the lower rear reinforcing plate are all steel plates.
[0017] Preferably, the upper left reinforcing plate, the upper right reinforcing plate, the lower left reinforcing plate, the lower right reinforcing plate, the upper front reinforcing plate, the upper middle reinforcing plate, the upper rear reinforcing plate, the lower front reinforcing plate, the lower middle reinforcing plate, and the lower rear reinforcing plate are all 100mm wide and 5mm thick.
[0018] Preferably, the upper left reinforcing plate and the upper right reinforcing plate are both bonded to the top surface of the existing precast hollow floor slab, the lower left reinforcing plate and the lower right reinforcing plate are both bonded to the bottom surface of the existing precast hollow floor slab, the upper front reinforcing plate, the upper middle reinforcing plate and the upper rear reinforcing plate are respectively bonded to the upper left reinforcing plate, the top surface of the existing precast hollow floor slab and the upper right reinforcing plate, and the lower front reinforcing plate, the lower middle reinforcing plate and the lower rear reinforcing plate are respectively bonded to the lower left reinforcing plate, the bottom surface of the existing precast hollow floor slab and the lower right reinforcing plate.
[0019] Preferably, the left front tie bolt, the left middle tie bolt, the left rear tie bolt, the right front tie bolt, the right middle tie bolt, and the right rear tie bolt are all 10mm in diameter.
[0020] The main beneficial effects of this utility model are as follows:
[0021] In the construction of the reinforcement structure for newly opened large openings in existing precast hollow core slabs according to this utility model, before opening the new large opening and the grouting hole on the top of the slab, the upper left and upper right reinforcement plates are placed on the top surface of the existing precast hollow core slab, respectively, to the left and right of the opening location. The lower left and lower right reinforcement plates are connected to the bottom surface of the existing precast hollow core slab. The upper front reinforcement plate, upper middle reinforcement plate, and upper rear reinforcement plate are respectively placed on the upper left reinforcement plate, the top surface of the existing precast hollow core slab, and the upper right reinforcement plate. The upper middle reinforcement plate and upper rear reinforcement plate are respectively located before and after the opening location. The plates are located before and after the grouting hole opening on the top of the slab. The lower front reinforcement plate, lower middle reinforcement plate, and lower rear reinforcement plate are all connected to the lower left reinforcement plate, the bottom surface of the existing precast hollow floor slab, and the lower right reinforcement plate, respectively. The reinforcement plates are fixed by tie bolts at the intersections. Then, a new larger opening and a grouting hole on the top of the slab are opened. Grout is injected into the hollow channels of the existing precast hollow floor slab through the grouting hole on the top of the slab. Therefore, it can reinforce the area around the opening of the new larger opening, ensuring reliable and firm reinforcement while reducing the amount of construction work and construction difficulty, speeding up construction, and reducing construction costs. It is suitable for large-scale promotion and application.
[0022] These and other objects, features and advantages of this utility model will be fully apparent from the following detailed description and drawings, and can be achieved by the means, devices and combinations thereof specifically pointed out in the description of the utility model. Attached Figure Description
[0023] Figure 1 This is a top-view perspective partial schematic diagram of a specific embodiment of the existing precast hollow floor slab with newly opened and reinforced large openings according to this utility model.
[0024] Figure 2 yes Figure 1 A cross-sectional view of position AA in the middle.
[0025] (Symbol Explanation)
[0026] 1 Existing precast hollow core slab; 2 Newly opened larger opening; 3 Grouting hole at the top of the slab; 4 Grouting material; 5 Upper left reinforcing plate; 6 Upper right reinforcing plate; 7 Lower left reinforcing plate; 8 Lower right reinforcing plate; 9 Upper front reinforcing plate; 10 Upper middle reinforcing plate; 11 Upper rear reinforcing plate; 12 Lower rear reinforcing plate; 13 Left front tie bolt; 14 Left middle tie bolt; 15 Left rear tie bolt; 16 Right front tie bolt; 17 Right middle tie bolt; 18 Right rear tie bolt; 19 Hollow duct. Detailed Implementation
[0027] In order to better understand the technical content of this utility model, the following embodiments are provided for detailed description.
[0028] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0029] Please see Figures 1-2 As shown, in a specific embodiment of this utility model, the existing precast hollow floor slab with newly opened larger opening reinforcement structure includes an existing precast hollow floor slab 1, a newly opened larger opening 2, a grouting hole 3 on the top of the slab, grouting material 4, an upper left reinforcement plate 5, an upper right reinforcement plate 6, a lower left reinforcement plate 7, a lower right reinforcement plate 8, an upper front reinforcement plate 9, an upper middle reinforcement plate 10, an upper rear reinforcement plate 11, a lower front reinforcement plate (not shown in the figure), a lower middle reinforcement plate (not shown in the figure), a lower rear reinforcement plate 12, a left front tie bolt 13, a left middle tie bolt 14, a left rear tie bolt 15, a right front tie bolt 16, a right middle tie bolt 17, and a right rear tie bolt 18, wherein:
[0030] The existing precast hollow floor slab 1 is horizontally arranged along the front-to-back direction. The newly opened larger opening 2 is vertically arranged in the existing precast hollow floor slab 1. The grouting material injection hole 3 is vertically arranged in the top of the existing precast hollow floor slab 1 and connects to the hollow channel 19 of the existing precast hollow floor slab 1. The hollow channel 19 connects to the newly opened larger opening 2. The grouting material 4 fills the hollow channel 19.
[0031] The upper left reinforcing plate 5 and the upper right reinforcing plate 6 are both horizontally arranged along the front-back direction and spaced apart from each other on the top surface of the existing precast hollow floor slab 1. The lower left reinforcing plate 7 and the lower right reinforcing plate 8 are both horizontally arranged along the front-back direction and spaced apart from each other. The lower left reinforcing plate 7 and the lower right reinforcing plate 8 are both located below the bottom surface of the existing precast hollow floor slab 1 and are both connected to the bottom surface of the existing precast hollow floor slab 1. The reinforcing plate 5, the lower left reinforcing plate 7, the upper right reinforcing plate 6, and the lower right reinforcing plate 8 are all vertically spaced apart. The upper front reinforcing plate 9, the upper middle reinforcing plate 10, and the upper rear reinforcing plate 11 are all horizontally arranged along the left-right direction and are vertically spaced apart. The lower front reinforcing plate, the lower middle reinforcing plate, and the lower rear reinforcing plate 12 are all horizontally arranged along the left-right direction and are vertically spaced apart. The upper front reinforcing plate 9, the lower front reinforcing plate 7, and the lower middle reinforcing plate 8 are all vertically spaced apart. The upper middle reinforcement plate 10, the lower middle reinforcement plate, the upper rear reinforcement plate 11, and the lower rear reinforcement plate 12 are all arranged vertically at intervals. The upper front reinforcement plate 9, the upper middle reinforcement plate 10, and the upper rear reinforcement plate 11 are respectively arranged on the upper left reinforcement plate 5, the top surface of the existing precast hollow floor slab 1, and the upper right reinforcement plate 6. The lower front reinforcement plate, the lower middle reinforcement plate, and the lower rear reinforcement plate 12 are respectively located on the lower left reinforcement plate 7, the top surface of the existing precast hollow floor slab 1, and the top surface of the existing precast hollow floor slab 1. The bottom surface of the precast hollow floor slab 1 and the lower right reinforcing plate 8 are respectively connected to the lower left reinforcing plate 7, the bottom surface of the existing precast hollow floor slab 1 and the lower right reinforcing plate 8. The newly opened larger opening 2 is located between the upper left reinforcing plate 5, the upper right reinforcing plate 6, the upper middle reinforcing plate 10 and the upper rear reinforcing plate 11. The grouting hole 3 at the top of the slab is located between the upper left reinforcing plate 5, the upper right reinforcing plate 6, the upper front reinforcing plate 9 and the upper middle reinforcing plate 10.
[0032] The upper front reinforcing plate 9, the upper left reinforcing plate 5, the existing precast hollow floor slab 1, the lower left reinforcing plate 7, and the lower front reinforcing plate are vertically fixed by vertically arranged left front tie bolts 13. The upper middle reinforcing plate 10, the upper left reinforcing plate 5, the existing precast hollow floor slab 1, the lower left reinforcing plate 7, and the lower middle reinforcing plate are vertically fixed by vertically arranged left middle tie bolts 14. The upper rear reinforcing plate 11, the upper left reinforcing plate 5, the existing precast hollow floor slab 1, the lower left reinforcing plate 7, and the lower rear reinforcing plate 12 are vertically fixed by vertically arranged left rear tie bolts 15. The upper front reinforcement plate 9, the upper right reinforcement plate 6, the existing precast hollow floor slab 1, the lower right reinforcement plate 8, and the lower front reinforcement plate are vertically fixed by the right front tie bolts 16. The upper middle reinforcement plate 10, the upper right reinforcement plate 6, the existing precast hollow floor slab 1, the lower right reinforcement plate 8, and the lower middle reinforcement plate are vertically fixed by the right middle tie bolts 17. The upper rear reinforcement plate 11, the upper right reinforcement plate 6, the existing precast hollow floor slab 1, the lower right reinforcement plate 8, and the lower rear reinforcement plate 12 are vertically fixed by the right rear tie bolts 18.
[0033] The thickness of the existing precast hollow floor slab 1 is determined according to the actual situation. In a specific embodiment of this utility model, the thickness of the existing precast hollow floor slab 1 is 12cm.
[0034] The newly opened, larger opening 2 can have any suitable shape; preferably, the newly opened, larger opening 2 is a rectangular or circular opening. See also... Figure 1 As shown, in a specific embodiment of this utility model, the newly opened larger opening 2 is a circular hole.
[0035] The length and width of the rectangular hole or the diameter of the circular hole can be determined as needed. More preferably, the length and width of the rectangular hole or the diameter of the circular hole are both 300mm to 1000mm. In a specific embodiment of this utility model, the diameter of the circular hole is 500mm.
[0036] The grouting hole 3 on the top of the slab can have any suitable shape. Please refer to [link / reference]. Figure 1 As shown, in a specific embodiment of this utility model, the grouting hole 3 on the top of the plate is a rectangular hole.
[0037] The distance between the newly opened larger opening 2 and the grouting hole 3 on the top of the slab can be determined as needed. In a specific embodiment of this utility model, the distance between the newly opened larger opening 2 and the grouting hole 3 on the top of the slab is 150mm.
[0038] The upper left reinforcing plate 5, the upper right reinforcing plate 6, the lower left reinforcing plate 7, the lower right reinforcing plate 8, the upper front reinforcing plate 9, the upper middle reinforcing plate 10, the upper rear reinforcing plate 11, the lower front reinforcing plate, the lower middle reinforcing plate, and the lower rear reinforcing plate 12 can be reinforcing plates of any suitable material. In a specific embodiment of this utility model, the upper left reinforcing plate 5, the upper right reinforcing plate 6, the lower left reinforcing plate 7, the lower right reinforcing plate 8, the upper front reinforcing plate 9, the upper middle reinforcing plate 10, the upper rear reinforcing plate 11, the lower front reinforcing plate, the lower middle reinforcing plate, and the lower rear reinforcing plate 12 are all steel plates.
[0039] The width and thickness of the upper left reinforcing plate 5, the upper right reinforcing plate 6, the lower left reinforcing plate 7, the lower right reinforcing plate 8, the upper front reinforcing plate 9, the upper middle reinforcing plate 10, the upper rear reinforcing plate 11, the lower front reinforcing plate, the lower middle reinforcing plate, and the lower rear reinforcing plate 12 can be determined as needed. In a specific embodiment of this utility model, the upper left reinforcing plate 5, the upper right reinforcing plate 6, the lower left reinforcing plate 7, the lower right reinforcing plate 8, the upper front reinforcing plate 9, the upper middle reinforcing plate 10, the upper rear reinforcing plate 11, the lower front reinforcing plate, the lower middle reinforcing plate, and the lower rear reinforcing plate 12 are all 100mm wide and 5mm thick.
[0040] The upper left reinforcing plate 5 and the upper right reinforcing plate 6 are disposed on the top surface of the existing precast hollow floor slab 1. The lower left reinforcing plate 7 and the lower right reinforcing plate 8 are both connected to the bottom surface of the existing precast hollow floor slab 1. The upper front reinforcing plate 9, the upper middle reinforcing plate 10, and the upper rear reinforcing plate 11 are respectively disposed on the upper left reinforcing plate 5, the top surface of the existing precast hollow floor slab 1, and the upper right reinforcing plate 6. The lower front reinforcing plate, the lower middle reinforcing plate, and the lower rear reinforcing plate 12 are respectively connected to the lower left reinforcing plate 7, the bottom surface of the existing precast hollow floor slab 1, and the lower right reinforcing plate 8. Any suitable structure can be adopted. In a specific embodiment of this utility model, the upper left reinforcing plate 5 and the upper right reinforcing plate 6 are both bonded to the top surface of the existing precast hollow floor slab 1, the lower left reinforcing plate 7 and the lower right reinforcing plate 8 are both bonded to the bottom surface of the existing precast hollow floor slab 1, the upper front reinforcing plate 9, the upper middle reinforcing plate 10 and the upper rear reinforcing plate 11 are respectively bonded to the upper left reinforcing plate 5, the top surface of the existing precast hollow floor slab 1 and the upper right reinforcing plate 6, and the lower front reinforcing plate, the lower middle reinforcing plate and the lower rear reinforcing plate 12 are respectively bonded to the lower left reinforcing plate 7, the bottom surface of the existing precast hollow floor slab 1 and the lower right reinforcing plate 8.
[0041] The diameters of the left front tie bolt 13, the left middle tie bolt 14, the left rear tie bolt 15, the right front tie bolt 16, the right middle tie bolt 17, and the right rear tie bolt 18 can be determined as needed. In a specific embodiment of this utility model, the left front tie bolt 13, the left middle tie bolt 14, the left rear tie bolt 15, the right front tie bolt 16, the right middle tie bolt 17, and the right rear tie bolt 18 are all 10mm in diameter, that is, all are φ10 tie bolts.
[0042] During construction, before opening the new larger opening 2 and the grouting hole 3 on the top of the slab, the upper left reinforcing plate 5 and the upper right reinforcing plate 6 are both installed (e.g., bonded with adhesive) on the top surface of the existing precast hollow floor slab 1, respectively located to the left and right of the opening position of the new larger opening (the opening position of the new larger opening is set according to the renovation design requirements, and the grouting hole opening position is located before the opening position of the new larger opening). The lower left reinforcing plate 7 and the lower right reinforcing plate 8 are both connected (e.g., bonded with adhesive) to the bottom surface of the existing precast hollow floor slab 1, and the upper front... Reinforcing plate 9, upper middle reinforcing plate 10, and upper rear reinforcing plate 11 are all respectively installed (e.g., bonded with adhesive) on the top surface of the upper left reinforcing plate 5, the top surface of the existing precast hollow floor slab 1, and the upper right reinforcing plate 6. The upper middle reinforcing plate 10 and the upper rear reinforcing plate 11 are located before and after the newly opened larger opening position, respectively. The upper front reinforcing plate 9 and the upper middle reinforcing plate 10 are located before and after the grouting hole opening position on the top of the slab, respectively. The lower front reinforcing plate, lower middle reinforcing plate, and lower rear reinforcing plate 12 are all connected (e.g., bonded with adhesive) to the lower left reinforcing plate 7 and the existing precast hollow floor slab 1. The bottom surface of the core floor slab 1 and the lower right reinforcing plate 8 are reinforced to enhance the load-bearing capacity of the slabs surrounding the newly opened larger opening 2. The upper front reinforcing plate 9, upper left reinforcing plate 5, existing precast hollow floor slab 1, lower left reinforcing plate 7, and lower front reinforcing plate are vertically fixed by left front tie bolts 13. The upper middle reinforcing plate 10, upper left reinforcing plate 5, existing precast hollow floor slab 1, lower left reinforcing plate 7, and lower middle reinforcing plate are vertically fixed by left middle tie bolts 14. The upper rear reinforcing plate 11, upper left reinforcing plate 5, and existing precast hollow floor slab 1 are vertically fixed by left rear tie bolts 15. The lower left reinforcing plate 7 and the lower rear reinforcing plate 12 are vertically fixed to the upper front reinforcing plate 9, the upper right reinforcing plate 6, the existing precast hollow floor slab 1, the lower right reinforcing plate 8, and the lower front reinforcing plate by the right front tie bolt 16. The upper middle reinforcing plate 10, the upper right reinforcing plate 6, the existing precast hollow floor slab 1, the lower right reinforcing plate 8, and the lower middle reinforcing plate by the right middle tie bolt 17. The upper rear reinforcing plate 11, the upper right reinforcing plate 6, the existing precast hollow floor slab 1, the lower right reinforcing plate 8, and the lower rear reinforcing plate 12 are vertically fixed by the right rear tie bolt 18.
[0043] A new, larger opening 2 is made (e.g., by cutting with a cutting machine) between the upper left reinforcing plate 5, the upper right reinforcing plate 6, the upper middle reinforcing plate 10, and the upper rear reinforcing plate 11, vertically penetrating the existing precast hollow floor slab 1. A grouting hole 3 is made (e.g., by cutting with a cutting machine) at the top of the existing precast hollow floor slab 1 between the upper left reinforcing plate 5, the upper right reinforcing plate 6, the upper front reinforcing plate 9, and the upper middle reinforcing plate 10. Grouting material 4 is injected into the hollow channel 19 of the existing precast hollow floor slab 1 through the grouting hole 3.
[0044] Grouting material 4 is a fluid material with good fluidity, early strength, high strength and micro-expansion properties. It is injected into the hollow channel 19 of the existing precast hollow floor slab 1 through the grouting material injection hole 3 at the top of the slab to compensate for the weakening of the cross section of the existing precast hollow floor slab 1 caused by the opening of the new larger opening 2, and to strengthen the load-bearing capacity of the floor slab around the new larger opening 2.
[0045] Therefore, this utility model provides a reinforcement structure for newly opened large openings in existing precast hollow floor slabs. It uses reinforcement plates, tie bolts and grouting material to reinforce the perimeter of the newly opened large openings, ensuring reliable and firm reinforcement while reducing the amount of construction work and construction difficulty, speeding up construction, reducing construction costs and project cost.
[0046] In summary, the existing precast hollow core slab opening reinforcement structure of this utility model can reinforce the surrounding area of the opening location, ensuring reliable and firm reinforcement while reducing the amount of construction work and difficulty, accelerating the construction speed, and reducing construction costs, making it suitable for large-scale promotion and application.
[0047] Therefore, it is evident that the objective of this utility model has been fully and effectively achieved. The function and structural principles of this utility model have been demonstrated and explained in the embodiments. Without departing from the stated principles, any modifications can be made to the implementation methods. Therefore, this utility model includes all modified embodiments based on the spirit and scope of the claims.
Claims
1. A reinforcement structure for opening larger openings in existing precast hollow core slabs, comprising existing precast hollow core slabs, wherein the existing precast hollow core slabs are horizontally arranged and arranged along the front-to-back direction, characterized in that, The existing precast hollow core slab reinforcement structure with newly opened larger openings also includes the newly opened larger opening, grouting material injection holes on the top of the slab, grouting material, upper left reinforcement plate, upper right reinforcement plate, lower left reinforcement plate, lower right reinforcement plate, upper front reinforcement plate, upper middle reinforcement plate, upper rear reinforcement plate, lower front reinforcement plate, lower middle reinforcement plate, lower rear reinforcement plate, left front tie bolt, left middle tie bolt, left rear tie bolt, right front tie bolt, right middle tie bolt, and right rear tie bolt, wherein: The newly opened larger opening is vertically arranged in the existing precast hollow floor slab, and the grouting material injection hole on the top of the slab is vertically arranged in the top of the existing precast hollow floor slab and connected to the hollow channel of the existing precast hollow floor slab. The hollow channel is connected to the newly opened larger opening, and the grouting material is filled in the hollow channel. The upper left and upper right reinforcing plates are both horizontally arranged along the front-to-back direction and spaced apart from each other on the top surface of the existing precast hollow floor slab. The lower left and lower right reinforcing plates are both horizontally arranged along the front-to-back direction and spaced apart from each other. The lower left and lower right reinforcing plates are both located below and connected to the bottom surface of the existing precast hollow floor slab. The upper left and lower left reinforcing plates, as well as the upper right and lower right reinforcing plates, are spaced apart vertically. The upper front, upper middle, and upper rear reinforcing plates are all horizontally arranged along the left-to-right direction and spaced apart from each other. The lower front, lower middle, and lower rear reinforcing plates are all horizontally arranged along the left-to-right direction and spaced apart from each other. The lower front reinforcement plate, the upper middle reinforcement plate, the lower middle reinforcement plate, the upper rear reinforcement plate, and the lower rear reinforcement plate are all arranged vertically at intervals. The upper front reinforcement plate, the upper middle reinforcement plate, and the upper rear reinforcement plate are respectively located on the upper left reinforcement plate, the top surface of the existing precast hollow floor slab, and the upper right reinforcement plate. The lower front reinforcement plate, the lower middle reinforcement plate, and the lower rear reinforcement plate are respectively located below the lower left reinforcement plate, the bottom surface of the existing precast hollow floor slab, and the lower right reinforcement plate, and are respectively connected to the lower left reinforcement plate, the bottom surface of the existing precast hollow floor slab, and the lower right reinforcement plate. The newly opened larger opening is located between the upper left reinforcement plate, the upper right reinforcement plate, the upper middle reinforcement plate, and the upper rear reinforcement plate. The grouting hole at the top of the slab is located between the upper left reinforcement plate, the upper right reinforcement plate, the upper front reinforcement plate, and the upper middle reinforcement plate. The upper front reinforcement plate, the upper left reinforcement plate, the existing precast hollow floor slab, the lower left reinforcement plate, and the lower front reinforcement plate are vertically fixed by vertically arranged left front tie bolts. The upper middle reinforcement plate, the upper left reinforcement plate, the existing precast hollow floor slab, the lower left reinforcement plate, and the lower middle reinforcement plate are vertically fixed by vertically arranged left middle tie bolts. The upper rear reinforcement plate, the upper left reinforcement plate, the existing precast hollow floor slab, the lower left reinforcement plate, and the lower rear reinforcement plate are vertically fixed by vertically arranged left rear tie bolts. The upper front reinforcement plate, the upper right reinforcement plate, the existing precast hollow floor slab, the lower right reinforcement plate, and the lower front reinforcement plate are vertically fixed by vertically arranged right front tie bolts. The upper middle reinforcement plate, the upper right reinforcement plate, the existing precast hollow floor slab, the lower right reinforcement plate, and the lower middle reinforcement plate are vertically fixed by vertically arranged right middle tie bolts. The upper rear reinforcement plate, the upper right reinforcement plate, the existing precast hollow floor slab, the lower right reinforcement plate, and the lower rear reinforcement plate are vertically fixed by vertically arranged right rear tie bolts.
2. The reinforcement structure for opening larger openings in existing precast hollow floor slabs as described in claim 1, characterized in that, The thickness of the existing precast hollow floor slab is 12cm.
3. The reinforcement structure for opening larger openings in existing precast hollow floor slabs as described in claim 1, characterized in that, The newly opened larger opening is either a rectangular or round hole.
4. The reinforcement structure for opening larger openings in existing precast hollow floor slabs as described in claim 3, characterized in that, The length and width of the rectangular hole or the diameter of the circular hole are both 300mm to 1000mm.
5. The reinforcement structure for opening larger openings in existing precast hollow floor slabs as described in claim 1, characterized in that, The grouting holes on the top of the slab are rectangular.
6. The reinforcement structure for opening larger openings in existing precast hollow floor slabs as described in claim 1, characterized in that, The distance between the newly opened larger opening and the grouting hole on the top of the slab is 150mm.
7. The reinforcement structure for opening larger openings in existing precast hollow floor slabs as described in claim 1, characterized in that, The upper left reinforcing plate, the upper right reinforcing plate, the lower left reinforcing plate, the lower right reinforcing plate, the upper front reinforcing plate, the upper middle reinforcing plate, the upper rear reinforcing plate, the lower front reinforcing plate, the lower middle reinforcing plate, and the lower rear reinforcing plate are all steel plates.
8. The reinforcement structure for opening larger openings in existing precast hollow floor slabs as described in claim 1, characterized in that, The upper left reinforcing plate, the upper right reinforcing plate, the lower left reinforcing plate, the lower right reinforcing plate, the upper front reinforcing plate, the upper middle reinforcing plate, the upper rear reinforcing plate, the lower front reinforcing plate, the lower middle reinforcing plate, and the lower rear reinforcing plate are all 100mm wide and 5mm thick.
9. The reinforcement structure for opening larger openings in existing precast hollow floor slabs as described in claim 1, characterized in that, The upper left and upper right reinforcing plates are both bonded to the top surface of the existing precast hollow floor slab. The lower left and lower right reinforcing plates are both bonded to the bottom surface of the existing precast hollow floor slab. The upper front, upper middle, and upper rear reinforcing plates are respectively bonded to the upper left reinforcing plate, the top surface of the existing precast hollow floor slab, and the upper right reinforcing plate. The lower front, lower middle, and lower rear reinforcing plates are respectively bonded to the lower left reinforcing plate, the bottom surface of the existing precast hollow floor slab, and the lower right reinforcing plate.
10. The reinforcement structure for opening larger openings in existing precast hollow floor slabs as described in claim 1, characterized in that, The left front tie bolt, the left middle tie bolt, the left rear tie bolt, the right front tie bolt, the right middle tie bolt, and the right rear tie bolt are all 10mm in diameter.