CN-224228129-U - Prefabricated concrete grid structure of roof framework access opening

Abstract

The utility model belongs to the technical field of precast concrete grids, and particularly relates to a precast concrete grid structure of a roof framework access hole, which comprises a plurality of vertical precast grids, wherein two butt joint precast grids are arranged between the two vertical precast grids, the lengths of the two butt joint precast grids are smaller than those of the vertical precast grids, horizontal grids are arranged at the bottom ends of the two butt joint precast grids, the lower side of each horizontal grid is an access hole, each horizontal grid comprises two first channel steel, two ends of each first channel steel are welded with the vertical precast grids at two sides, a connecting piece is arranged between the upper side of each first channel steel and each butt joint precast grid, and concrete is poured outside each first channel steel. The utility model can solve the problem that the construction of the grid at the overhaul port is difficult due to the adoption of the prefabrication process of the roof grid, and ensures the production uniformity of the prefabrication grid.

Inventors

• WANG YONGNAN
• ZHANG WEIWEI
• Su Zezhou
• Zheng Kuangmin
• Xing Xueyun
• XIANG WENYAN
• CHEN YU
• ZHANG YANTAO
• Fang Zifen
• HE KANG
• XING ZHIQUAN
• WANG LONG
• YANG CHENGLING
• WANG HAISEN

Assignees

• 厦门中海地产有限公司
• 福州大学

Dates

Publication Date

20260512

Application Date

20250609

Claims (6)

1. 1. The precast concrete grid structure of the roof framework access opening is characterized by comprising a plurality of vertical precast grids (1), wherein two butt joint precast grids (6) are arranged between the two vertical precast grids (1), the lengths of the two butt joint precast grids (6) are smaller than those of the vertical precast grids (1), horizontal grids (2) are arranged at the bottom ends of the two butt joint precast grids (6), and the lower side of each horizontal grid (2) is an access opening; The horizontal grid (2) comprises two first channel steels (4), two ends of each first channel steel (4) are welded with the vertical prefabricated grids (1) on two sides, connecting pieces are arranged between the first channel steels (4) and the butt-joint prefabricated grids (6) on the upper sides, and concrete is poured on the outer sides of the first channel steels (4).
2. 2. The prefabricated concrete grid structure of the roof framework access opening is characterized in that two embedded steel plates (3) are embedded in the vertical prefabricated grids (1) close to two sides of the first channel steel (4), the embedded steel plates (3) are L-shaped, the same welding plate (5) is fixedly connected with the end faces of the embedded steel plates (3) on the same side, the welding plate (5) is flush with the surface of the vertical prefabricated grids (1), and two ends of the first channel steel (4) are welded with the welding plates (5) on two sides respectively.
3. 3. The prefabricated concrete grid structure of the roof framework access opening is characterized in that the connecting piece comprises a U-shaped rib (8) embedded in the butt-joint prefabricated grid (6), a second channel steel (7) is embedded in the end face of the bottom of the butt-joint prefabricated grid (6), the bottom of the U-shaped rib (8) is welded with the second channel steel (7), and the second channel steel (7) is fixedly connected with the first channel steel (4).
4. 4. The prefabricated concrete grid structure for the access opening of the roof framework according to claim 1, wherein the surface of the butt-joint prefabricated grid (6) is provided with reinforcing bars (9).
5. 5. The prefabricated concrete grid structure for the access opening of the roof framework according to claim 1, wherein a plurality of stirrups (10) are respectively arranged at two ends of the vertical prefabricated grid (1) close to each other.
6. 6. The prefabricated concrete grid structure for the roof framework access opening, as set forth in claim 1, is characterized in that the vertical prefabricated grids (1) are provided with hanging point reserved holes (11).

Description

Prefabricated concrete grid structure of roof framework access opening Technical Field The utility model belongs to the technical field of precast concrete grids, and particularly relates to a precast concrete grid structure of a roof truss access opening. Background The precast concrete grid structure is prefabricated in a factory and then transported to a construction site for installation, so that the on-site wet operation is reduced, the construction efficiency is improved, and the construction period is shortened. And the prefabricated part has higher precision, more guaranteed quality and more convenient and quick installation. Because the roof grating adopts the prefabrication process, the construction of the access opening part is difficult, how to ensure the continuity of field installation without waiting, and unify prefabricated components to enable the prefabricated grating to be in common mode, and the conditions of simple and convenient field construction and the like can be realized, thus the roof grating is a problem to be solved in the prior art. Disclosure of utility model The utility model aims to provide a prefabricated concrete grid structure of a roof framework access opening, which can solve the problems that the construction of the access opening part grid is difficult due to the adoption of a prefabrication process for the roof grid, ensure the uniformity of prefabricated grid production, finish the production of the prefabricated grid at the top of the access opening by only adjusting the position of a die end plate, ensure the continuous installation and the simple construction of the access opening part grid. The technical scheme adopted by the utility model is as follows: The precast concrete grid structure of the roof framework access hole comprises a plurality of vertical precast grids, wherein two butt-joint precast grids are arranged between the two vertical precast grids, the lengths of the two butt-joint precast grids are smaller than those of the vertical precast grids, horizontal grids are arranged at the bottom ends of the two butt-joint precast grids, and the lower side of the horizontal grids is the access hole; The horizontal grating comprises two first channel steels, two ends of each first channel steel are welded with the vertical prefabricated gratings on two sides, a connecting piece is arranged between each first channel steel and the corresponding prefabricated grating, and concrete is poured on the outer side of each first channel steel. Two embedded steel plates are embedded in the vertical prefabricated grids close to the two sides of the first channel steel respectively, the embedded steel plates are L-shaped, the two embedded steel plates on the same side are fixedly connected with the same welding plate on the end face of the embedded steel plates, the welding plate is flush with the surface of the vertical prefabricated grids, and the two ends of the first channel steel are welded with the welding plates on the two sides respectively. The connecting piece is including the pre-buried U type muscle in the prefabricated grid of butt joint, the pre-buried second channel-section steel that has of butt joint prefabricated grid bottom terminal surface, U type muscle bottom and second channel-section steel welding, fixed connection between second channel-section steel and the first channel-section steel. And reinforcing bars are assembled on the surface of the butt joint prefabricated grid. The vertical prefabricated grille is respectively provided with a plurality of stirrups close to two ends. Hanging point preformed holes are formed in the vertical prefabricated grids. The utility model has the technical effects that: the prefabricated concrete grid structure for the access opening of the roof framework solves the problems that the construction of the access opening part grid is difficult due to the adoption of a prefabrication process for the roof grid, ensures the uniformity of prefabricated grid production, can finish the production of the prefabricated grid at the top of the access opening by only adjusting the position of the end plate of the die, can ensure the continuous installation and the simple construction of the access opening part grid on site. Drawings FIG. 1 is a perspective view of an embodiment of the present utility model; FIG. 2 is a front view of an embodiment of the present utility model; FIG. 3 is a schematic view of the structure of a horizontal grid according to an embodiment of the present utility model; Fig. 4 is a schematic side view of a first channel steel according to an embodiment of the present utility model; FIG. 5 is a schematic cross-sectional view of A-A of FIG. 3 in accordance with an embodiment of the present utility model; FIG. 6 is a schematic view of a structure of a pre-buried steel plate according to an embodiment of the present utility model; FIG. 7 is a schematic view of the structure of a vertical pre-fabricated