Lightweight prefabricated stair component

Abstract

The utility model discloses a lightweight prefabricated stair member, which relates to the technical field of building structures, and comprises a stair step plate and two stair oblique beams, and each step of the stair step plate is provided with a preformed hole; the two stair oblique beams are connected to the left side and the right side of the bottom face of the stair step plate respectively, reserved anchoring steel bars are arranged at the upper beam ends of the two stair oblique beams, and hoisting points are arranged in the overlapping area of the stair step plate and the stair oblique beams. Preformed holes can be reserved through the embedded pipes to reduce the self weight of the prefabricated staircase, and the purposes of reducing the production and manufacturing cost of components and saving the lease cost of hoisting equipment are achieved; the mode that the stair is cut off from the middle and then assembled is avoided, and the strength of the prefabricated stair can be prevented from being affected.

Description

Technical Field

[0001] The utility model relates to the technical field of building structures, in particular to a lightweight prefabricated staircase component. Background Art

[0002] Prefabricated beam stairs are mainly composed of stair inclined beams and stair treads, both of which are reinforced concrete structures with a large overall weight. During the actual lifting process, due to the size of the site, large lifting equipment cannot enter the site, and small lifting equipment cannot lift the heavier prefabricated beam stairs. The traditional idea is to split the prefabricated stairs longitudinally in the middle and then do the splicing treatment during the subsequent installation, but this treatment will affect the overall strength of the entire prefabricated beam staircase. Utility Model Content

[0003] The purpose of the utility model is to provide a lightweight prefabricated staircase component to solve the following technical problems:

[0004] How to solve the problem that the lifting equipment cannot meet the lifting requirements due to site limitations?

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A lightweight prefabricated stair component, characterized in that it includes a stair tread and two stair oblique beams, the two stair oblique beams are integrally connected to the left and right sides of the bottom surface of the stair tread, each step of the stair tread is provided with a reserved hole, the distance between the reserved hole and the edge is not less than 20 mm, and a lifting point is provided in the overlapping area of ​​the stair tread and the stair oblique beam.

[0007] As a further solution of the utility model: step distribution reinforcement is horizontally arranged in the stair treads, tread surface reinforcement is arranged between the step distribution reinforcements, and the upper ends of the tread surface reinforcement extend out of the stair treads; the reinforcement of the stair inclined beam includes upper longitudinal reinforcement, lower longitudinal reinforcement and inclined beam stirrups, and the two ends of the step distribution reinforcement are respectively connected to the inclined beam stirrups in the two stair inclined beams.

[0008] The upper ends of the upper longitudinal bars and the lower longitudinal bars extend out from the staircase inclined beam, and the ends of the extended parts of the upper longitudinal bars are bent downward, and the ends of the extended parts of the lower longitudinal bars are bent upward, and the bent ends of the upper longitudinal bars and the lower longitudinal bars are connected.

[0009] The first step of the stair tread is provided with four end longitudinal bars and end stirrups connecting the width thereof, the four end longitudinal bars are distributed at the four inner corners of the rectangular frame surrounded by the end stirrups, the end longitudinal bars are connected to the upper longitudinal bars and the lower longitudinal bars, and the bottom end of the lower longitudinal bars is provided with a hook for holding the end longitudinal bars.

[0010] The reserved holes are set by pre-burying PVC pipes in advance.

[0011] As a further solution of the utility model: reserved anchoring steel bars are arranged at the upper beam ends of the two staircase inclined beams.

[0012] As a further solution of the utility model: the reinforcement of the staircase inclined beam includes two upper longitudinal bars, two lower longitudinal bars and a plurality of inclined beam stirrups; wherein the two upper longitudinal bars and the two lower longitudinal bars are distributed at the four inner corners of the rectangular frame surrounded by the inclined beam stirrups.

[0013] As a further solution of the utility model: the density of the stirrups of the inclined beam in the front and rear areas of the lifting point is higher than that in other areas.

[0014] As a further solution of the utility model: a hanging point reinforcement rib is arranged on each side of the hanging point, and the hanging point reinforcement rib includes two straight rods which are parallel to the treads and facades of the stair treads respectively, and the two straight rods are each connected to an outward inclined rod which is parallel to and connected to the lower longitudinal reinforcement, and the left and right hanging point reinforcement ribs are connected through the hanging point transverse reinforcement at the intersection of the two straight rods.

[0015] Beneficial effects of the utility model:

[0016] The utility model can leave reserved holes through pre-buried pipes to reduce the dead weight of the prefabricated stairs, thereby reducing the production cost of components and saving the cost of renting lifting equipment; it avoids the method of cutting the stairs in the middle and then assembling them, which can avoid affecting the strength of the prefabricated stairs; the overall strength of the prefabricated staircase components is ensured by two staircase inclined beams, and on this basis, hanging point reinforcement ribs composed of straight rods and inclined rods are arranged, and the components are cleverly connected to further improve the overall strength of the prefabricated staircase components. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the structure of the utility model.

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model.

[0020] In the figure: 1. Stair treads; 2. Stair inclined beams; 3. Lifting points; 4. Upper longitudinal reinforcement; 5. Lower longitudinal reinforcement; 6. Inclined beam stirrups; 7. Tread distribution reinforcement; 8. Tread surface reinforcement; 9. Lifting point reinforcement; 10. Lifting point transverse reinforcement; 11. End longitudinal reinforcement; 12. End stirrups; 13. Reserved holes; 14. Straight rods; 15. Diagonal rods; 16. Anchor steel bars. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-2 The utility model provides a lightweight prefabricated stair component, including a stair tread 1 and two stair oblique beams 2, the two stair oblique beams 2 are integrally connected to the left and right sides of the bottom surface of the stair tread 1, and reserved anchor steel bars 16 are arranged at the upper beam ends of the two stair oblique beams 2. A reserved hole 13 is arranged on each step of the stair tread 1, and the reserved hole 13 is arranged by pre-buried PVC pipes. The distance between the reserved hole 13 and the edge is not less than 20 mm, and a hoisting point 3 is arranged in the overlapping area of ​​the stair tread 1 and the stair oblique beam 2.

[0023] The reinforcement of the stair inclined beam 2 includes upper longitudinal reinforcement 4, lower longitudinal reinforcement 5 and inclined beam stirrups 6. The two upper longitudinal reinforcements 4 and the two lower longitudinal reinforcements 5 are distributed at the four inner corners of the rectangular frame surrounded by the inclined beam stirrups 6; the reinforcement of the left and right stair inclined beams 2 is connected through the step distribution reinforcement 7 in the stair tread 1, and the tread surface reinforcement 8 is arranged between the step distribution reinforcement 7; the upper ends of the upper longitudinal reinforcement 4 and the lower longitudinal reinforcement 5 extend out of the stair inclined beam 2, and the extended parts serve as anchor steel bars 16; the upper ends of the tread surface reinforcement 8 extend out of the stair tread 1.

[0024] The ends of the extended parts of the upper longitudinal reinforcement 4 of the inclined beam are bent downward, and the ends of the extended parts of the lower longitudinal reinforcement 5 of the inclined beam are bent upward, and the bent sections of the upper longitudinal reinforcement 4 of the inclined beam and the lower longitudinal reinforcement 5 of the inclined beam are connected.

[0025] The stirrups 6 of the inclined beam before and after the lifting point 3 are denser than those in other areas, and a lifting point reinforcement rib 9 is arranged on the left and right of the lifting point 3. The lifting point reinforcement rib 9 includes two straight rods 14 which are parallel to the stair treads and the facade respectively. The two straight rods 14 are each connected to an outwardly extending inclined rod 15 which is parallel to and connected to the lower longitudinal reinforcement 5 of the inclined beam. The left and right lifting point reinforcement ribs 9 are connected through the lifting point transverse reinforcement 10 at the intersection of the two straight rods 14.

[0026] The middle of the step distribution reinforcement 7 is a straight concave section, and the two ends are lifted upward and then bent vertically downward to hook on the upper longitudinal reinforcement 4 of the inner inclined beam.

[0027] The first step of the stair tread 1 is provided with four end longitudinal reinforcements 11 connecting the width thereof. The four end longitudinal reinforcements 11 are distributed at the four inner corners of the rectangular frame surrounded by the end stirrups 12. The end longitudinal reinforcements 11 are connected to the upper longitudinal reinforcements 4 and the lower longitudinal reinforcements 5 of the stair inclined beams 2 on both sides. A hook for holding the end longitudinal reinforcements 11 is provided at the bottom end of the lower longitudinal reinforcement 5 of the inclined beam.

[0028] The concrete strength grade of the prefabricated components is C30, the upper longitudinal reinforcement 4 and the lower longitudinal reinforcement 5 in the stair inclined beam 2 are made of steel with a strength grade of HRB400, and the remaining steel bars are made of HRB300 steel.

[0029] The working principle of this utility model:

[0030] When hoisting the stair component, since a reserved hole 13 is set on each step of the stair tread 1 in the stair component, the overall weight of the stair component is greatly reduced, and the overall structure of the stair component is simple and easy to manufacture. The overall strength of the prefabricated stair component is ensured by two stair inclined beams 2, and on this basis, the reserved hole 13 is reserved by a pre-buried pipe to reduce the self-weight of the prefabricated stair component, which not only reduces the production cost of the component, but also greatly reduces the rental cost of the hoisting equipment.

[0031] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A lightweight prefabricated staircase component, characterized in that: The invention comprises a stair tread (1) and two stair inclined beams (2), wherein the two stair inclined beams (2) are integrally connected to the left and right sides of the bottom surface of the stair tread (1), a reserved hole (13) is provided on each step of the stair tread (1), and the distance between the reserved hole (13) and the edge is not less than 20 mm, and a hoisting point (3) is provided in the overlapping area of ​​the stair tread (1) and the stair inclined beam (2); The stair tread (1) is provided with tread distribution bars (7) in the transverse direction, tread surface bars (8) are arranged between the tread distribution bars (7), and the upper ends of the tread surface bars (8) extend out of the stair tread (1); the reinforcement of the stair inclined beam (2) comprises upper longitudinal bars (4), lower longitudinal bars (5) and inclined beam stirrups (6), and the two ends of the tread distribution bars (7) are respectively connected to the inclined beam stirrups (6) in the two stair inclined beams (2); The upper ends of the upper longitudinal reinforcement (4) and the lower longitudinal reinforcement (5) extend out of the staircase inclined beam (2), and the end of the extended portion of the upper longitudinal reinforcement (4) is bent downward, and the end of the extended portion of the lower longitudinal reinforcement (5) is bent upward, and the bent ends of the upper longitudinal reinforcement (4) and the lower longitudinal reinforcement (5) are connected; The first step of the stair tread (1) is provided with four end longitudinal bars (11) and end stirrups (12) connecting the width of the stair tread. The four end longitudinal bars (11) are distributed at four inner corners of a rectangular frame surrounded by the end stirrups (12). The end longitudinal bars (11) are connected to the upper longitudinal bars (4) and the lower longitudinal bars (5), and the bottom end of the lower longitudinal bars (5) is provided with a hook for holding the end longitudinal bars (11).

2. The lightweight prefabricated staircase component according to claim 1, characterized in that: The reserved hole (13) is provided by pre-buried PVC pipes.

3. The lightweight prefabricated staircase component according to claim 1, characterized in that: Reserved anchoring steel bars (16) are arranged at the upper beam ends of the two staircase inclined beams (2).

4. The lightweight prefabricated staircase component according to claim 1, characterized in that: The reinforcement of the staircase inclined beam (2) comprises two upper longitudinal bars (4), two lower longitudinal bars (5) and a plurality of inclined beam stirrups (6); wherein the two upper longitudinal bars (4) and the two lower longitudinal bars (5) are distributed at the four inner corners of a rectangular frame surrounded by the inclined beam stirrups (6).

5. The lightweight prefabricated staircase component according to claim 4, characterized in that: The density of the inclined beam stirrups (6) in the areas before and after the lifting point (3) is greater than that in other areas.

6. The lightweight prefabricated staircase component according to claim 1, characterized in that: A hanging point reinforcement rib (9) is provided on each side of the hanging point (3), and the hanging point reinforcement rib (9) comprises two straight rods (14) respectively parallel to the tread and the vertical surface of the stair tread (1), and the two straight rods (14) are each connected to an outwardly extending oblique rod (15) parallel to and connected to the lower longitudinal rib (5), and the left and right hanging point reinforcement ribs (9) are connected via a hanging point transverse rib (10) at the intersection of the two straight rods (14).

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