Prefabricated stair support connecting structure

Abstract

The utility model relates to a prefabricated stair support connecting structure which comprises cast-in-place stair beams, a prefabricated stair board, a high-end fixed hinge support and a low-end sliding hinge support, and the prefabricated stair board is installed between every two adjacent cast-in-place stair beams. The end, with the relatively high position, of the prefabricated stair plate is connected with the cast-in-place stair beam through a high-end fixing hinge support, the end, with the relatively low position, of the prefabricated stair plate is in butt joint with the cast-in-place stair beam through a low-end sliding hinge support, and the high-end fixing hinge support comprises high-strength bolts, high-strength grouting materials and cement mortar. Two high-strength bolts with vertically-upward bolt bodies are embedded side by side in the prefabricated stair plates at high relative positions, butt joint holes matched with the high-strength bolts are formed in the prefabricated stair plates, and the bottoms of the butt joint holes are filled with high-strength grouting materials. And part of labor is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of glass curtain wall hoisting accessories, in particular to a prefabricated stair support connection structure. Background Art

[0002] As the use rate of prefabricated stairs in the construction of residential buildings is increasing, there are differences in the construction efficiency, convenience and earthquake resistance of the prefabricated stair support connection. Some treatment methods use rigid connections of reinforced concrete, which is extremely inconvenient to cast in local positions during construction and difficult to ensure quality. At the same time, when the support is subjected to external forces, it is easy to crack and is extremely unstable. In order to solve the above technical problems, a new connection structure needs to be designed. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a prefabricated stair support connection structure, which has a simple structure and is convenient to construct. It can improve the construction efficiency of the prefabricated stairs, save part of the labor, ensure the construction quality, and create economic benefits. At the same time, it also increases the seismic stability, which plays an important role in the durability of the construction project.

[0004] The technical solution adopted by the utility model to solve its technical problems is: to provide a prefabricated stair support connection structure, including cast-in-place stair beams, prefabricated stair slabs, high-end fixed hinge supports and low-end sliding hinge supports, the prefabricated stair slabs are installed between two adjacent cast-in-place stair beams, the relatively high end of the prefabricated stair slabs is connected to the cast-in-place stair beams through the high-end fixed hinge support, the relatively low end of the prefabricated stair slabs is connected to the cast-in-place stair beams through the low-end sliding hinge support, the high-end fixed hinge support includes high-strength bolts, high-strength grouting material and cement mortar, and two high-strength bolts are embedded side by side on the relatively high prefabricated stair slabs. A high-strength bolt with a bolt body facing vertically upward, the prefabricated stair slab is provided with a docking hole matching the high-strength bolt, the bottom of the docking hole is filled with high-strength grouting material, and the upper end of the docking hole is filled with cement mortar, the low-end sliding hinge support comprises high-strength bolts, cement mortar and nut washers, two lower docking through holes are arranged side by side on the end of the prefabricated stair slab at the lower end, and upper high-strength bolts matching the two lower docking through holes are arranged side by side on the cast-in-place stair beam at the lower end, a nut washers is installed on the upper end of the high-strength bolts, the nut washers separate the lower docking through holes, the space below the nut washers forms a cavity, and the nut washers are filled with cement mortar.

[0005] As a supplement to the present technical solution, the joints of the cast-in-place staircase beams are provided with rectangular docking interfaces for docking with prefabricated staircase slabs, and polystyrene boards, PE rods and silicone glue are arranged in sequence from bottom to top on the vertical side walls of the rectangular docking interfaces.

[0006] As a supplement to the technical solution, a layer of cement mortar is provided on the bottom surface of the rectangular butt joint of the cast-in-place staircase beam.

[0007] As a supplement to the technical solution, a layer of felt is arranged between the bottom surface of the rectangular butt joint where the low-end sliding hinge support is installed and the cement mortar.

[0008] Beneficial effects: The utility model relates to a prefabricated stair support connection structure, which has a simple structure and is convenient to construct. It can improve the construction efficiency of the prefabricated stairs, save part of the labor, ensure the construction quality, and create economic benefits. At the same time, it also increases the seismic stability, which plays an important role in the durability of the construction project. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural view of the utility model;

[0010] Figure 2 This is a structural view of the high-end fixed hinge support described in the utility model;

[0011] Figure 3 It is a structural view of the low-end sliding hinge support described in the utility model.

[0012] Diagram: 1. Cast-in-place stair beam, 2. Precast stair slab, 3. High-end fixed hinge support, 4. Low-end sliding hinge support, 5. High-strength bolts, 6. Cement mortar, 7. High-strength grouting material, 8. Polystyrene board, 9. PE rod, 10. Silicone glue, 11. Tarpaulin, 12. Cavity, 13. Nut and gasket. DETAILED DESCRIPTION

[0013] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

[0014] The embodiment of the utility model relates to a prefabricated stair support connection structure, such as Figure 1As shown in FIG. 3, the present invention comprises a cast-in-place stair beam 1, a prefabricated stair slab 2, a high-end fixed hinge support 3 and a low-end sliding hinge support 4, wherein the prefabricated stair slab 2 is installed between two adjacent cast-in-place stair beams 1, and the relatively high end of the prefabricated stair slab 2 is connected to the cast-in-place stair beam 1 through the high-end fixed hinge support 3, and the relatively low end of the prefabricated stair slab 2 is butted against the cast-in-place stair beam 1 through the low-end sliding hinge support 4, the high-end fixed hinge support 3 comprises a high-strength bolt 5, a high-strength grouting material 7 and cement mortar 6, and two high-strength bolts 5 with bolt bodies facing vertically upward are embedded side by side on the relatively high prefabricated stair slab 2. The stair slab 2 is provided with docking holes matching the high-strength bolts 5, the bottom of the docking holes is filled with high-strength grouting material 7, and the upper end of the docking holes is filled with cement mortar 6. The low-end sliding hinge support 4 includes high-strength bolts 5, cement mortar 6 and nut washers 13. Two lower docking through holes are arranged side by side on one end of the prefabricated stair slab 2 at the lower end, and upper high-strength bolts 5 matching the two lower docking through holes are arranged side by side on the cast-in-place stair beam 1 at the lower end. Nut washers 13 are installed on the upper ends of the high-strength bolts 5. The nut washers 13 separate the lower docking through holes, and the space below the nut washers 13 forms a cavity 12, and the nut washers 13 are filled with cement mortar 6.

[0015] As a supplement to the present technical solution, the joints of the cast-in-place stair beams 1 are provided with rectangular docking interfaces for docking with the prefabricated stair slabs 2, and polystyrene boards 8, PE rods 9 and silicone glue 10 are arranged in sequence from bottom to top on the vertical side walls of the rectangular docking interfaces.

[0016] As a supplement to the present technical solution, a layer of cement mortar 6 is provided on the bottom surface of the rectangular butt joint of the cast-in-place staircase beam 1.

[0017] As a supplement to the present technical solution, a layer of felt 11 is arranged between the bottom surface of the rectangular interface where the low-end sliding hinge support 4 is installed and the cement mortar 6.

[0018] Example

[0019] Step 1:

[0020] During the implementation of the main structure, high-strength bolts 5 are embedded in the brackets of the cast-in-place stair beam 1 of the rest platform, and connected to the high-end fixed hinge support 3 and the low-end sliding hinge support 4 in the prefabricated stair slab 2 hoisted later through the high-strength bolts 5.

[0021] Step 2, such as Figure 2 , 3 Detailed diagram:

[0022] During hoisting, first use cement mortar 6 to level the elevation at the support of the cast-in-place stair beam 1. Among them, a layer of felt 11 should be added to the low-end sliding hinge support 4 before the cement mortar construction to ensure that the top surface of the support and the contact surface with the bottom end of the prefabricated stair slab 2 are flat and have no height difference, and there is no gap in the docking. At this time, the main construction of the high-end fixed hinge support 3 and the low-end sliding hinge support 4 has been completed.

[0023] Step three, such as Figure 2 As shown:

[0024] During the construction of the side of the high-end fixed hinge support 3, the gap between the prefabricated stair slab 2 and the cast-in-place stair beam 1 is first filled with polystyrene board 8, and then sealed with PE rod 9 to the structural elevation of the cast-in-place stair beam 1, and finally completed with cement mortar 6 to the building elevation, so that the prefabricated stair slab and the cast-in-place stair beam are connected to form a fixed whole. During the construction of the bottom surface of the high-end fixed hinge support 3, the high-strength bolts 5 embedded in the cast-in-place stair beam 1 are connected to the bolt holes reserved in the prefabricated stair slab 2, and the bolt holes at the support are filled with high-strength grouting material 7 to ensure that there are no gaps in the holes. A small section is reserved on the top and sealed with cement mortar 6. When subjected to external force, the two components of the cast-in-place stair beam 1 and the prefabricated stair slab 2 form a whole, maintain common displacement, and transmit force smoothly, which will not cause the prefabricated stair slab 2 to shake.

[0025] Step 4: Figure 3 As shown:

[0026] This step is similar to step three. When constructing the side of the low-end sliding hinge support 4, the gap between the prefabricated stair slab 2 and the cast-in-place stair beam 1 is first filled with polystyrene board 8, and then sealed with PE rod 9 to the structural elevation of the cast-in-place stair beam 1. Unlike the high-end fixed hinge support 3, the rigid material cement mortar 6 is no longer used to complete the building leveling, but the flexible material silicone glue 10 is used to complete it to the building surface elevation.

[0027] In this way, there is a flexible displacement between the prefabricated stair slab 2 and the cast-in-place stair beam 1. When constructing the bottom surface of the low-end sliding hinge support 4, the high-strength bolts 5 embedded in the cast-in-place stair beam 1 are connected to the bolt holes reserved in the prefabricated stair slab 2, but the bolt holes at the support are not processed and remain empty to form a cavity 12. At the same time, nuts and washers 13 are installed on the top of the embedded high-strength bolts 5, and finally cement mortar 6 is used for sealing, so that a sliding hinge support 4 is finally formed between the cast-in-place stair beam 1 and the prefabricated stair slab 2. When subjected to external forces from an earthquake, the two components are subjected to force independently and can maintain a certain displacement, so that the prefabricated stair slab 2 and the cast-in-place stair beam 1 will not be torn or broken, thereby causing safety and quality risks and affecting the use function.

[0028] The above is a detailed introduction to a prefabricated stair support connection structure provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A prefabricated stair support connection structure, characterized by: The invention comprises a cast-in-place staircase beam (1), a prefabricated staircase slab (2), a high-end fixed hinge support (3) and a low-end sliding hinge support (4), wherein the prefabricated staircase slab (2) is installed between two adjacent cast-in-place staircase beams (1), and the end of the prefabricated staircase slab (2) at a relatively high position is connected to the cast-in-place staircase beam (1) through the high-end fixed hinge support (3), and the end of the prefabricated staircase slab (2) at a relatively low position is connected to the cast-in-place staircase beam (1) through the low-end sliding hinge support (4), and the high-end fixed hinge support (3) comprises a high-strength bolt (5), a high-strength grouting material (7) and cement mortar (6), and two high-strength bolts (5) with the bolt bodies facing vertically upward are embedded side by side on the relatively high prefabricated staircase slab (2), and the prefabricated staircase slab ( 2) is provided with a docking hole matching the high-strength bolt (5), the bottom of the docking hole is filled with high-strength grouting material (7), and the upper end of the docking hole is filled with cement mortar (6), the low-end sliding hinge support (4) includes a high-strength bolt (5), cement mortar (6) and a nut gasket (13), two lower docking holes are arranged side by side on one end of the prefabricated stair slab (2) at the lower end, and upper high-strength bolts (5) matching the two lower docking holes are arranged side by side on the cast-in-place stair beam (1) at the lower end, and a nut gasket (13) is installed on the upper end of the high-strength bolt (5), the nut gasket (13) separates the lower docking holes, and the space below the nut gasket (13) forms a cavity (12), and the nut gasket (13) is filled with cement mortar (6).

2. The prefabricated stair support connection structure according to claim 1, characterized in that: The joint parts of the cast-in-situ stair beams (1) are all provided with rectangular joints for jointing with the prefabricated stair slabs (2), and the vertical side walls of the rectangular joints are sequentially provided with polystyrene boards (8), PE rods (9) and silicone glue (10) from bottom to top.

3. The prefabricated stair support connection structure according to claim 2, characterized in that: A layer of cement mortar (6) is provided on the bottom surface of the rectangular butt joint of the cast-in-place staircase beam (1).

4. The prefabricated stair support connection structure according to claim 3, characterized in that: A layer of felt (11) is provided between the bottom surface of the rectangular butt joint where the lower end sliding hinge support (4) is installed and the cement mortar (6).

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