Prefabricated concrete grating structure for access hole of roof framework

Abstract

The utility model belongs to the technical field of prefabricated concrete grids, and particularly relates to a prefabricated concrete grid structure of a roof framework access hole, which comprises a plurality of vertical prefabricated grids, two butt-joint prefabricated grids are arranged between two vertical prefabricated grids, and two butt-joint prefabricated grids are arranged between two butt-joint prefabricated grids. The length of the two butt-joint prefabricated grids is smaller than that of the vertical prefabricated grid, a horizontal grid is arranged at the bottom ends of the two butt-joint prefabricated grids, and an access hole is formed in the lower side of the horizontal grid; the horizontal grid comprises two first steel channels, the two ends of the first steel channels are welded to the vertical prefabricated grids on the two sides, a connecting piece is arranged between the first steel channel on the upper side and the butt joint prefabricated grid, and concrete is poured on the outer sides of the first steel channels. According to the utility model, the problems that the roof grating adopts a prefabrication process and the grating at the access hole part is difficult to construct can be solved, and the uniformity of the production of the prefabricated grating is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of precast concrete grid technology, specifically relating to a precast concrete grid structure for a roof frame inspection port. Background Technology

[0002] Precast concrete grid structures are manufactured in a factory and then transported to the construction site for installation, reducing on-site wet work, improving construction efficiency, and shortening the construction period. Furthermore, precast components have higher precision, ensuring better quality, and are easier and faster to install.

[0003] Because the roof grid uses a prefabrication process, the construction of the access panel is difficult. How to ensure the continuity of on-site installation without waiting, unify the prefabricated components to make the prefabricated grids common, and simplify on-site construction are all problems that urgently need to be solved. Utility Model Content

[0004] The purpose of this utility model is to provide a precast concrete grid structure for the inspection port of a roof frame, which can solve the problem of difficult construction of the grid in the inspection port section when using precast technology for roof grids. It ensures the uniformity of precast grid production. The production of the precast grid at the top of the inspection port can be completed by simply adjusting the position of the mold end plate. The construction of the grid in the inspection port section can ensure continuous on-site installation and is simple.

[0005] The specific technical solution adopted by this utility model is as follows:

[0006] A precast concrete grid structure for a roof frame access panel includes several vertical precast grids, wherein two butt-joint precast grids are provided between two of the vertical precast grids, the length of the two butt-joint precast grids is less than the length of the vertical precast grids, and a horizontal grid is provided at the bottom of the two butt-joint precast grids, with the access panel located below the horizontal grid.

[0007] The horizontal grid includes two first channel steels, the two ends of which are welded to the two vertical precast grids on both sides. A connector is provided between the upper first channel steel and the butt precast grid, and concrete is poured on the outside of the first channel steel.

[0008] Two embedded steel plates are pre-embedded in the vertical prefabricated grids near the two sides of the first channel steel. The embedded steel plates are L-shaped, and the two embedded steel plates on the same side are fixedly connected to the same welding plate. The welding plate is flush with the surface of the vertical prefabricated grid, and the two ends of the two first channel steels are respectively welded to the welding plates on both sides.

[0009] The connector includes a U-shaped rib embedded in the precast grid, a second channel steel is embedded in the bottom end face of the precast grid, the bottom of the U-shaped rib is welded to the second channel steel, and the second channel steel is fixedly connected to the first channel steel.

[0010] The surface of the precast grid is reinforced with ribs.

[0011] The vertical precast grid is fitted with multiple stirrups near both ends.

[0012] Each of the vertical prefabricated grids has a reserved hole for lifting points.

[0013] The technical effects achieved by this utility model are as follows:

[0014] This utility model provides a precast concrete grid structure for roof frame access ports, which solves the problem of difficult construction of the access port section grid when using precast roof grids. It ensures the uniformity of precast grid production, and the production of the top precast grid of the access port can be completed by simply adjusting the position of the mold end plate. The construction of the access port section grid can ensure continuous on-site installation and is simple. Attached Figure Description

[0015] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0016] Figure 2 This is a front view of an embodiment of the present utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the horizontal grille according to an embodiment of the present invention;

[0018] Figure 4 This is a side view schematic diagram of the distribution structure of the first channel steel in this embodiment of the present invention;

[0019] Figure 5 This is an embodiment of the present utility model. Figure 3 Schematic diagram of the cross-sectional structure of AA;

[0020] Figure 6 This is a schematic diagram of the structure of the embedded steel plate in an embodiment of this utility model;

[0021] Figure 7 This is a schematic diagram of the structure of the vertical prefabricated grid according to an embodiment of the present invention;

[0022] Figure 8 This is a structural schematic diagram of the prefabricated grid in an embodiment of this utility model;

[0023] Figure 9 This is a top view of the U-shaped rib in an embodiment of the present invention;

[0024] Figure 10 This is a structural schematic diagram of the reinforcement in an embodiment of this utility model.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Vertical precast grid; 2. Horizontal grid; 3. Embedded steel plate; 4. First channel steel; 5. Welded plate; 6. Butt-jointed precast grid; 7. Second channel steel; 8. U-shaped reinforcement; 9. Reinforcement; 10. Stirrups; 11. Pre-drilled holes for lifting points. Detailed Implementation

[0027] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0028] like Figures 1-10 As shown, a precast concrete grid structure for a roof frame access panel includes several vertical precast grids 1, wherein two butt-joint precast grids 6 are provided between two vertical precast grids 1, the length of the two butt-joint precast grids 6 is less than the length of the vertical precast grids 1, and a horizontal grid 2 is provided at the bottom of the two butt-joint precast grids 6, with an access panel on the lower side of the horizontal grid 2.

[0029] The horizontal grid 2 includes two first channel steels 4. The two ends of the first channel steel 4 are welded to the two vertical precast grids 1 on both sides. A connector is provided between the upper first channel steel 4 and the butt precast grid 6. Concrete is poured on the outside of the first channel steel 4.

[0030] The problem of difficult construction of the inspection port section of the grating has been solved. The uniformity of prefabricated grating production has been ensured. The production of the prefabricated grating at the top of the inspection port can be completed by simply adjusting the position of the mold end plate. The construction of the grating section of the inspection port can ensure continuous on-site installation and is simple to construct.

[0031] like Figure 6 As shown, two embedded steel plates 3 are pre-embedded in the vertical prefabricated grids 1 near the two sides of the first channel steel 4. The embedded steel plates 3 are L-shaped, and the same welding plate 5 is fixedly connected to the end faces of the two embedded steel plates 3 on the same side. The welding plate 5 is flush with the surface of the vertical prefabricated grid 1. The two ends of the two first channel steels 4 are welded to the welding plates 5 on both sides respectively. The embedded steel plates 3 and the welding plates 5 form a pre-embedded and connecting assembly. The area of ​​the welding plate 5 is larger than the end face area of ​​the first channel steel 4 to provide a larger welding space during subsequent welding, which can enhance welding stability.

[0032] like Figure 8 and Figure 9As shown, the connector includes a U-shaped rib 8 embedded in the precast grid 6, and a second channel steel 7 embedded in the bottom end face of the precast grid 6. The bottom of the U-shaped rib 8 is welded to the second channel steel 7, and the second channel steel 7 is fixedly connected to the first channel steel 4. By setting the connector, it is easy to fix the precast grid 6 to the first channel steel 4 after the first channel steel 4 is welded. The connection between the first channel steel 4 and the second channel steel 7 can be achieved by welding, bolting, riveting, or other fixed connection methods.

[0033] like Figure 8 As shown, the surface of the precast grid 6 is fitted with reinforcing bars 9.

[0034] The reinforcement 9 can withstand the tensile, compressive, and shear forces that the grid bears during use. For example, when the precast concrete grid at the roof frame access point bears loads such as pedestrian traffic and equipment placement, the reinforcement can effectively resist the stress generated by these external forces, preventing the grid from cracking, deforming, or even being damaged, thereby improving the load-bearing capacity of the grid and ensuring its safe and reliable use.

[0035] The vertical precast grid 1 is equipped with multiple stirrups 10 near both ends.

[0036] The stirrups 10 provide lateral restraint to the concrete. When the concrete is under compression, they limit its lateral deformation, improve its compressive strength and deformation capacity, and place the concrete in a triaxial compression state. This allows the concrete to fully utilize its compressive strength and enhances the load-bearing capacity of the precast grid. Simultaneously, during the concrete setting process, the stirrups 10 also reduce cracks caused by shrinkage and temperature changes, improving the concrete's density and integrity.

[0037] Each vertical precast grid 1 is provided with a pre-drilled lifting point hole 11. The precast grid is usually prefabricated in the factory and then transported to the construction site for installation. The pre-drilled lifting point hole 11 provides a connection point for lifting equipment. By inserting slings or hooks into the pre-drilled holes, the precast grid can be lifted steadily and accurately placed in the designed position, which facilitates the installation work of construction personnel and improves the efficiency and accuracy of installation.

[0038] The working principle of this utility model is as follows: After the construction of the cast-in-place inverted beam and the pre-embedded continuous steel plate on the roof is completed, the vertical prefabricated grid 1 on both sides of the inspection port is installed. The first channel steel 4 is welded to the vertical prefabricated grid 1 on both sides of the inspection port. Then, the butt-jointed prefabricated grid 6 is fixed to the surface of the first channel steel 4 through the second channel steel 7. Later, concrete is poured around the first channel steel 4 to wrap it, thereby forming a horizontal grid 2, which ensures the continuity of the roof grid installation and facilitates construction.

[0039] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A precast concrete grid structure for a roof frame access panel, characterized in that: It includes several vertical prefabricated grids (1), wherein two docking prefabricated grids (6) are provided between two vertical prefabricated grids (1), the length of the two docking prefabricated grids (6) is less than the length of the vertical prefabricated grids (1), and a horizontal grid (2) is provided at the bottom of the two docking prefabricated grids (6), and the lower side of the horizontal grid (2) is an inspection port. The horizontal grid (2) includes two first channel steels (4), the two ends of which are welded to the two vertical prefabricated grids (1) on both sides. A connector is provided between the upper first channel steel (4) and the butt prefabricated grid (6), and concrete is poured on the outside of the first channel steel (4).

2. The precast concrete grid structure for a roof frame access panel according to claim 1, characterized in that: Two embedded steel plates (3) are embedded in the vertical prefabricated grids (1) on both sides of the first channel steel (4). The embedded steel plates (3) are L-shaped. The two embedded steel plates (3) on the same side are fixedly connected to the same welding plate (5). The welding plate (5) is flush with the surface of the vertical prefabricated grid (1). The two ends of the first channel steel (4) are respectively welded to the welding plates (5) on both sides.

3. The precast concrete grid structure for a roof frame inspection opening according to claim 1, characterized in that: The connector includes a U-shaped rib (8) embedded in the precast grid (6), a second channel steel (7) is embedded in the bottom end face of the precast grid (6), the bottom of the U-shaped rib (8) is welded to the second channel steel (7), and the second channel steel (7) is fixedly connected to the first channel steel (4).

4. The precast concrete grid structure for a roof frame access panel according to claim 1, characterized in that: The surface of the precast grid (6) is fitted with reinforcing bars (9).

5. The precast concrete grid structure for a roof frame access panel according to claim 1, characterized in that: The vertical prefabricated grid (1) is equipped with multiple stirrups (10) near both ends.

6. The precast concrete grid structure for a roof frame access panel according to claim 1, characterized in that: Each of the vertical prefabricated grids (1) is provided with a pre-drilled hole (11) for hanging points.

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