Concrete prefabricated stair component

Abstract

A concrete prefabricated stair member belongs to the field of concrete prefabricated members. The concrete prefabricated stair component solves the technical problems that an existing prefabricated concrete stair is not stable enough due to the structure of a mounting hole, damage is prone to occurring in the assembling process, and the stability of follow-up earthquake resistance is poor, and then the concrete prefabricated stair component is provided. Bolts in the vertical direction are embedded in the lifting lugs of the upper stair beam and the lower stair beam correspondingly, and the stair body and the bolts are installed in a matched mode through the upper assembling holes and the lower assembling holes correspondingly. The diameter of the lower hole is smaller than that of the upper hole, a gasket is installed on the top face of the lower hole, and a nut is connected with a bolt and screwed through the gasket. Hole edge reinforcing ribs are arranged on the outer sides of the upper assembling hole and the lower assembling hole in the horizontal direction, the hole edge reinforcing ribs are arranged in an upper layer and a lower layer, and the outer sides of the hole edge reinforcing ribs are sleeved with stirrups in the vertical direction. Damage is not prone to occurring in the assembling process, and the overall shock resistance is improved. The precast concrete stair is used for precast concrete stairs.

Description

Technical Field

[0001] The utility model relates to a precast concrete stair component, belonging to the field of precast concrete components. Background Art

[0002] Compared with cast-in-situ concrete, precast concrete components produced in factories have many advantages: the relatively stable working environment in factories has a higher safety factor than the complex construction site operations; the quality and technology of building components can be better controlled through mechanized production; the standardization of the dimensions and characteristics of precast components can significantly accelerate the installation speed and construction progress; compared with traditional on-site formwork, the molds in factories can be reused in cycles, and mechanized production requires less labor. With the continuous increase of labor costs, the cost advantage of large-scale production of precast components will become more obvious. The on-site operation volume of construction sites using precast components is significantly reduced, and dust pollution and noise pollution are significantly reduced.

[0003] The existing precast concrete stairs are transported to the construction site after being prefabricated in the factory. The precast concrete stairs are assembled with the stair beams cast on the construction site. Installation holes are provided on the precast concrete stairs, and bolts are embedded in the stair beams. The precast concrete and the stair beams are installed in cooperation with the installation holes and the embedded bolts. The installation holes are limited by the embedded bolts. Due to their own structure, the installation holes are not stable enough, are prone to damage during the assembly process, and have poor seismic stability during subsequent use.

[0004] In summary, the existing precast concrete stairs have the technical problems of insufficient stability caused by the structure of their own installation holes, being prone to damage during the assembly process, and having poor seismic stability during subsequent use. Summary of the Invention

[0005] The utility model is to solve the technical problems that the existing precast concrete stairs have insufficient stability caused by the structure of their own installation holes, are prone to damage during the assembly process, and have poor seismic stability during subsequent use, and further proposes a precast concrete stair component.

[0006] The technical solution of the utility model is a precast concrete stair component, which includes a stair body 1, an upper stair beam 2 and a lower stair beam 3. Lugs 4 are provided on both the upper stair beam 2 and the lower stair beam 3. Vertical bolts 5 are embedded on the lugs 4 of the upper stair beam 2 and the lower stair beam 3. An upper assembly hole 6 in the vertical direction is penetrated and opened at the upper end of the stair body 1, and a lower assembly hole 7 in the vertical direction is penetrated and opened at the lower end of the stair body 1. The stair body 1 is installed in cooperation with the bolts 5 through the upper assembly hole 6 and the lower assembly hole 7 respectively;

[0007] The lower assembly hole 7 includes an upper hole 71, a lower hole 72, a gasket 73 and a nut. The hole diameter of the lower hole 72 is smaller than that of the upper hole 71. The gasket 73 is installed on the top surface of the lower hole 72. The nut is connected to the bolt 5 and tightened through the gasket 73.

[0008] Hole-edge reinforcing ribs 8 are arranged horizontally along the outer sides of the upper assembly hole 6 and the lower assembly hole 7. The hole-edge reinforcing ribs 8 are arranged in two layers, upper and lower. Stirrups 9 in the vertical direction are sleeved outside the hole-edge reinforcing ribs 8.

[0009] As another improvement of the present utility model, a mortar layer 10 is provided on the top surface of the lug 4. The thickness of the mortar layer 10 ranges from 20 mm to 25 mm.

[0010] As another improvement of the present utility model, a waterproof coiled material layer is laid on the top surface of the mortar layer 10.

[0011] As another improvement of the present utility model, the waterproof coiled material layer is a felt layer.

[0012] As another improvement of the present utility model, the side deformation joints between the staircase body 1 and the upper beam 2 are filled with polystyrene boards 11, and the side deformation joints between the staircase body 1 and the lower beam 3 are filled with polystyrene boards 11.

[0013] As another improvement of the present utility model, the hole-edge reinforcing ribs 8 are U-shaped, and the stirrups 9 simultaneously sleeve the two layers of the hole-edge reinforcing ribs 8.

[0014] As another improvement of the present utility model, lifting nuts 12 are embedded in the top surface of the staircase body 1.

[0015] As another improvement of the present utility model, the lifting nuts 12 are evenly arranged, and the number of the lifting nuts 12 is 4.

[0016] As another improvement of the present utility model, the upper assembly hole 6 is filled with concrete of C40 type.

[0017] Advantages of the present utility model:

[0018] 1. Hole-edge reinforcing ribs are arranged horizontally along the outer sides of the upper assembly hole and the lower assembly hole of the present utility model. The hole-edge reinforcing ribs are arranged in two layers, upper and lower. Stirrups in the vertical direction are sleeved outside the hole-edge reinforcing ribs. The stirrups in the vertical direction are used to improve the strength of the installation hole structure of the staircase body, improve the structural stability, are not easily damaged during the assembly process, and improve the overall seismic resistance.

[0019] 2. The hole diameter of the lower hole of the lower assembly hole of the present utility model is smaller than that of the upper hole. A gasket is installed on the top surface of the lower hole. The nut is connected to the bolt and tightened through the gasket; such a design facilitates the fixed connection between the bolt and the lower assembly hole, and the construction efficiency is high. Brief Description of the Drawings

[0020] Figure 1 is a schematic structural view of a precast concrete stair component of the present utility model.

[0021] Figure 2 is a schematic structural view of the lap joint between the upper stair beam and the stair body.

[0022] Figure 3 is a schematic structural view of the lap joint between the lower stair beam and the stair body.

[0023] Figure 4 is a schematic structural view of the lower assembly hole, the reinforcing rib around the hole and the stirrup.

[0024] Figure 5 is a top view schematic of a precast concrete stair component of the present utility model. Detailed Description of the Preferred Embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all the embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model. In the description of the present utility model, it should be noted that the positional relationships indicated by the terms "upper", "lower", "left", "right", etc. are only the positional relationships based on the orientation shown in the drawings, and are only for the convenience of describing the present utility model, rather than indicating or implying that the components referred to have a specific orientation, are constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

[0026] Detailed Embodiment 1: In combination with Figures 1 to 4 This embodiment will be described. A precast concrete stair component in this embodiment includes a stair body 1, an upper stair beam 2 and a lower stair beam 3. Lugs 4 are provided on both the upper stair beam 2 and the lower stair beam 3. Vertical bolts 5 are embedded on the lugs 4 of the upper stair beam 2 and the lower stair beam 3. An upper assembly hole 6 in the vertical direction is penetrated and opened at the upper end of the stair body 1, and a lower assembly hole 7 in the vertical direction is penetrated and opened at the lower end of the stair body 1. The stair body 1 is respectively installed in cooperation with the bolts 5 through the upper assembly hole 6 and the lower assembly hole 7; the thickness of the stair slab of the stair body 1 is between 120 mm and 150 mm.

[0027] The lower assembly hole 7 includes an upper hole 71, a lower hole 72, a gasket 73 and a nut. The hole diameter of the lower hole 72 is smaller than that of the upper hole 71. A gasket 73 is installed on the top surface of the lower hole 72. The nut is connected to the bolt 5 and tightened through the gasket 73;

[0028] On the outer sides of the upper assembly hole 6 and the lower assembly hole 7, hole-edge reinforcing ribs 8 are arranged horizontally. The hole-edge reinforcing ribs 8 are arranged in two upper and lower layers, and a stirrup 9 along the vertical direction is sleeved outside the hole-edge reinforcing ribs 8. Such a design facilitates the fixed lap joint of the bolt and the lower assembly hole, and has high construction efficiency. Using this connection method at the lap joint can fully release the stress concentration effect generated by structural deformation, enhance structural stability, and is beneficial to structural safety.

[0029] Adopting stirrups along the vertical direction to improve the strength of the installation hole structure of the staircase body, improve its structural stability, is not easy to be damaged during the assembly process, and improve its overall seismic resistance.

[0030] Specific Embodiment 2: In combination with Figures 1 to 4 Describe this embodiment. The difference between this embodiment and Specific Embodiment 1 is that a mortar layer 10 is provided on the top surface of the lug 4, and the thickness dimension range of the mortar layer 10 is 20 mm - 25 mm. The mortar layer 10 is used to reinforce the connection strength between the staircase body and the lug. Other components and connection methods are the same as those in Specific Embodiment 1.

[0031] Specific Embodiment 3: In combination with Figures 1 to 4 Describe this embodiment. The difference between this embodiment and Specific Embodiment 1 is that a waterproof coiled material layer is laid on the top surface of the mortar layer 10. The purpose is to enhance the waterproof performance of the staircase connection. Other components and connection methods are the same as those in Specific Embodiment 1 or 2.

[0032] Specific Embodiment 4: In combination with Figures 1 to 4 Describe this embodiment. The difference between this embodiment and Specific Embodiment 1 is that the waterproof coiled material layer is a felt layer. The purpose is to enhance the waterproof performance of the staircase connection. Other components and connection methods are the same as any one of Specific Embodiments 1 to 3.

[0033] Specific Embodiment 5: In combination with Figures 1 to 4 Describe this embodiment. The difference between this embodiment and Specific Embodiment 1 is that the side deformation joints between the staircase body 1 and the upper ladder beam 2 are filled with polystyrene boards 11, and the side deformation joints between the staircase body 1 and the lower ladder beam 3 are filled with polystyrene boards 11. Using flexible filling at the lap joint can fully release the stress concentration effect generated by structural deformation, enhance structural stability, and is beneficial to structural safety. Other components and connection methods are the same as any one of Specific Embodiments 1 to 4.

[0034] Specific Embodiment 6: In combination with Figures 1 to 4This embodiment is described. The difference between this embodiment and the first embodiment is that the hole edge reinforcement rib 8 is in a U shape, and the stirrup 9 simultaneously covers two layers of the hole edge reinforcement rib 8. The use of stirrups along the vertical direction improves the strength of the installation hole structure of the staircase body, improves the stability of its structure, is not easily damaged during the assembly process, and improves its overall earthquake resistance. The other components and connection methods are the same as any one of the first to fifth embodiments.

[0035] Specific implementation method seven: Combination Figure 5 This embodiment is described. The difference between this embodiment and the first embodiment is that a hoisting nut 12 is pre-embedded on the top surface of the staircase body 1. The purpose is to facilitate hoisting during construction. The other components and connection methods are the same as any one of the first to sixth embodiments.

[0036] Specific implementation method eight: Combination Figure 5 This embodiment is described. The difference between this embodiment and the first embodiment is that the lifting nuts 12 are evenly arranged and the number of the lifting nuts 12 is 4. The purpose is to facilitate the lifting during construction. The other components and connection methods are the same as any one of the first to seventh embodiments.

[0037] Specific implementation method nine: Combination Figure 2 This embodiment is described. The difference between this embodiment and the first embodiment is that the upper assembly hole 6 is filled with C40 concrete. The purpose is to increase the structural strength of the upper assembly hole. The other components and connection methods are the same as any one of the first to eighth embodiments.

[0038] Combination Figures 1 to 5 Explain the working principle of the utility model:

[0039] The prefabricated staircase is hoisted to the construction site, and the mortar layer and waterproof layer are constructed on the top surface of the ear of the upper ladder beam and the lower ladder beam before assembly. The staircase body is fixed between the upper ladder beam and the lower ladder beam and limited by bolts. The reserved construction joint is flexibly filled, and the installation holes are fixed and filled. The connection method of the utility model is adopted at the overlap to fully release the stress concentration effect caused by structural deformation, enhance structural stability, and benefit structural safety. The use of stirrups along the vertical direction improves the strength of the installation hole structure of the staircase body, improves its structural stability, is not easy to be damaged during the assembly process, and improves its overall seismic resistance.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A precast concrete stair component, characterized in that It includes a staircase body (1), an upper staircase beam (2) and a lower staircase beam (3). Ear tabs (4) are provided on both the upper staircase beam (2) and the lower staircase beam (3). Vertical bolts (5) are embedded in the ear tabs (4) of the upper staircase beam (2) and the lower staircase beam (3). A vertical upper assembly hole (6) is penetrated and opened at the upper end of the staircase body (1), and a vertical lower assembly hole (7) is penetrated and opened at the lower end of the staircase body (1). The staircase body (1) is installed in cooperation with the bolts (5) through the upper assembly hole (6) and the lower assembly hole (7) respectively; The lower assembly hole (7) includes an upper hole (71), a lower hole (72), a gasket (73) and a nut. The hole diameter of the lower hole (72) is smaller than that of the upper hole (71). The gasket (73) is installed on the top surface of the lower hole (72). The nut is connected to the bolt (5) and tightened through the gasket (73); Hole-edge reinforcement ribs (8) are arranged horizontally along the outer sides of the upper assembly hole (6) and the lower assembly hole (7). The hole-edge reinforcement ribs (8) are arranged in two upper and lower layers, and stirrups (9) in the vertical direction are sleeved outside the hole-edge reinforcement ribs (8).

2. A precast concrete stair component according to claim 1, characterized in that, A mortar layer (10) is provided on the top surface of the ear tab (4), and the thickness of the mortar layer (10) ranges from 20 mm to 25 mm.

3. A precast concrete stair component according to claim 2, characterized in that, A waterproof coiled material layer is laid on the top surface of the mortar layer (10).

4. A precast concrete staircase component according to claim 3, characterized in that, The waterproof coiled material layer is a felt layer.

5. A precast concrete staircase component according to claim 1, characterized in that, The side deformation joints between the staircase body (1) and the upper staircase beam (2) are filled with polystyrene boards (11), and the side deformation joints between the staircase body (1) and the lower staircase beam (3) are filled with polystyrene boards (11).

6. A precast concrete stair component according to any one of claims 1-5, characterized in that, The shape of the hole-edge reinforcement rib (8) is U-shaped, and the stirrup (9) sleeves both layers of the hole-edge reinforcement ribs (8) at the same time.

7. A precast concrete stair component according to claim 1, characterized in that, Lifting nuts (12) are embedded in the top surface of the staircase body (1).

8. A precast concrete stair component according to claim 1, characterized in that, The lifting nuts (12) are evenly arranged, and the number of the lifting nuts (12) is 4.

9. A precast concrete stair component according to claim 1, characterized in that, The upper assembly hole (6) is filled with C40 type concrete.

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