Lightweight prefabricated plate type stair component with hollow steps and bottom plate
By using PVC hollow pipes and polyethylene foam boards combined with a steel mesh structure in prefabricated stairs, the problem of heavy weight of prefabricated stairs was solved, achieving lightweight design, reducing production and hoisting costs, and ensuring the strength and structural integrity of the stairs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGXI UNIVERSITY OF TECHNOLOGY
- Filing Date
- 2025-07-31
- Publication Date
- 2026-06-26
AI Technical Summary
The existing prefabricated stair components are heavy, resulting in high transportation and construction costs. Furthermore, the cost of new lightweight materials is difficult to control, and the overall strength performance of the staircase is difficult to guarantee.
The lightweight precast slab staircase component is formed by combining PVC hollow pipes and polyethylene foam boards with a steel mesh structure and a C30 concrete layer, resulting in hollow treads and a base plate.
It significantly reduces the self-weight of staircase components, lowers production and hoisting costs, while ensuring the overall strength and structural integrity of the staircase.
Smart Images
Figure CN224412998U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building technology, specifically to a lightweight precast slab staircase component with hollow treads and base plate. Background Technology
[0002] Precast staircases are currently one of the key precast components in buildings, forming the "three-slab system" of prefabricated buildings along with precast composite floor slabs and precast interior and exterior wall panels. However, reinforced concrete slab staircases face challenges such as high transportation costs, insufficient tower crane counterweight, and expensive tower cranes due to their heavy weight. Therefore, achieving lightweighting of precast slab staircase components is crucial for promoting the practical application of precast slab staircases and is an urgent problem to be solved.
[0003] Current lightweight designs for prefabricated stairs mainly explore two aspects: material properties and structural optimization.
[0004] (1) In terms of materials, various lightweight materials such as ultra-high performance concrete, autoclaved aerated concrete, expanded polystyrene core material, and lightweight aggregate concrete can be used to replace traditional concrete, which can effectively control the thickness of the stair base plate or tread.
[0005] (2) In terms of structure, the weight reduction effect can be achieved by embedding hollow tubes in the steps, constructing the base plate in sections, or using steel wire mesh frame in the base plate in conjunction with steel truss (or ordinary steel bars) to form a steel wire skeleton to replace the traditional reinforcement.
[0006] Existing weight reduction methods have problems such as difficulty in controlling the cost of new lightweight materials and difficulty in ensuring the overall strength performance of stairs. Summary of the Invention
[0007] The present invention aims to solve one of the technical problems mentioned above by providing a lightweight prefabricated slab stair component with hollow treads and base plate, which can significantly reduce the self-weight of the stair component and reduce the cost of component production, manufacturing and hoisting transportation.
[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0009] A lightweight precast slab stair component with hollow treads and a base plate includes a precast stair base plate and treads, wherein the precast stair base plate has multiple treads. The lightweight precast slab stair component with hollow treads and a base plate includes PVC hollow tubes, a steel mesh, and a concrete layer. The PVC hollow tubes are disposed within the treads and extend along the length of the treads. The steel mesh is disposed within the precast stair base plate and extends along the length of the precast stair base plate. The concrete layer is poured within the precast stair base plate and the treads, and the concrete layer covers the PVC hollow tubes and the steel mesh.
[0010] Furthermore, it also includes a polyethylene foam board, which is located within the precast stair base slab and extends along the length of the precast stair base slab, and the polyethylene foam board is embedded in the steel mesh frame.
[0011] Furthermore, the number of polyethylene foam boards is two, and the two polyethylene foam boards are placed at intervals along the width direction of the prefabricated staircase base plate.
[0012] Furthermore, the steel reinforcement mesh includes two end stirrup frames and a middle steel reinforcement mesh. The two end stirrup frames are set at opposite ends of the precast stair base slab and both end stirrup frames are parallel to the horizontal line. The middle steel reinforcement mesh is set inside the precast stair base slab and connects the two end stirrup frames.
[0013] Furthermore, the central steel reinforcement mesh includes several longitudinal bars and several stirrups, the several longitudinal bars connect the two end stirrup frames, and the several stirrups are spaced apart along the length direction of the longitudinal bars and are all welded to the several longitudinal bars.
[0014] Furthermore, the end stirrup frame, the longitudinal bars, and the stirrups are all made of HRB400 grade steel bars.
[0015] Furthermore, the concrete layer is obtained by pouring C30 grade concrete.
[0016] By adopting the above technical solution, this utility model has the following beneficial effects:
[0017] This invention significantly reduces the self-weight of stair components by pre-embedding PVC hollow pipes in the treads and adding polyethylene foam boards to the prefabricated stair base slab, thereby lowering component production costs and saving on hoisting equipment rental costs. While meeting the minimum reinforcement ratio, it maximizes the hollowness of the treads and base slab, ensuring the integrity and corresponding strength of the staircase. It is suitable for widespread application. Attached Figure Description
[0018] Figure 1A structural schematic diagram of a lightweight precast slab staircase component with hollow treads and base plate.
[0019] Figure 2 for Figure 1 Sectional view along line AA.
[0020] In the attached diagram, 100-precast staircase base slab, 101-step, 1-PVC hollow pipe, 2-steel mesh, 3-concrete layer, 4-polyethylene foam board, 5-end stirrup frame, 51-longitudinal reinforcement, 52-stirrup, and 6-central steel mesh. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0024] like Figure 1 and Figure 2As shown, a preferred embodiment of this utility model provides a lightweight precast slab stair component with hollow treads and a hollow base plate, including a precast stair base plate 100, treads 101, PVC hollow tubes 1, a steel mesh frame 2, and a concrete layer 3. The precast stair base plate 100 has multiple levels of treads 101. The PVC hollow tubes 1 are disposed within the treads 101 and extend along the length of the treads 101. The steel mesh frame 2 is disposed within the precast stair base plate 100 and extends along the length of the precast stair base plate 100. The concrete layer 3 is poured within the precast stair base plate 100 and the treads 101, and covers the PVC hollow tubes 1 and the steel mesh frame 2.
[0025] In this embodiment, the steel reinforcement mesh 2 includes two end stirrup frames 5 and a middle steel reinforcement mesh 6. The two end stirrup frames 5 are located at opposite ends of the precast stair base slab 100 and are parallel to the horizontal line. The middle steel reinforcement mesh 6 is located within the precast stair base slab 100 and connects the two end stirrup frames 5. Specifically, the middle steel reinforcement mesh 6 includes a plurality of longitudinal bars 51 and a plurality of stirrups 52. The plurality of longitudinal bars 51 connect the two end stirrup frames 5, and the plurality of stirrups 52 are spaced apart along the length direction of the longitudinal bars 51 and are welded to the plurality of longitudinal bars 51.
[0026] In this embodiment, the lightweight precast slab stair component with hollow treads and base plate also includes polyethylene foam board 4. The polyethylene foam board 4 is located inside the precast stair base plate 100 and extends along the length direction of the precast stair base plate 100. The polyethylene foam board 4 is embedded in the steel mesh frame 2. Specifically, there are two polyethylene foam boards 4. The two polyethylene foam boards 4 are placed at intervals along the width direction of the precast stair base plate 100. Both polyethylene foam boards 4 are located inside the stirrups 52.
[0027] In this embodiment, the end stirrup frame 5, the longitudinal bar 51, and the stirrup 52 are all made of HRB400 grade steel bars.
[0028] In this embodiment, the concrete layer 3 is obtained by pouring C30 grade concrete.
[0029] Working principle:
[0030] 1. Determine the dimensions of the precast staircase and design a general mold, prioritizing the use of a combination of wooden and steel molds.
[0031] 2. Fabricate the molds according to the detailed reinforcement drawings in the design scheme, including steps such as drilling and welding steel plates, to manufacture the required mold components. Use precision measuring tools, such as a tape measure, to conduct a comprehensive inspection of the mold dimensions to ensure that the mold dimensions meet the manufacturing accuracy requirements.
[0032] 3. Cut the reinforcing steel according to the drawings, and pre-embed 90mm thick PVC hollow pipes 1 in the steps 101. At the same time, place two polyethylene foam boards 4 longitudinally in the precast stair base slab 100, with a spacing of 230mm and length, width and height of 2760mm, 360mm and 40mm respectively.
[0033] 4. Pour the concrete and wait for it to solidify.
[0034] This utility model, by pre-embedding PVC hollow pipes 1 in the steps 101 and adding polyethylene foam boards 4 to the prefabricated stair base slab 100, can significantly reduce the self-weight of the stair components, reduce the component production and manufacturing costs, and save on hoisting equipment rental costs; while meeting the minimum reinforcement ratio, it maximizes the hollowness of the steps and base slab, ensuring the integrity and corresponding strength of the staircase; it is suitable for widespread application.
[0035] The above description is a detailed description of the preferred embodiments of the present utility model. However, the embodiments are not intended to limit the scope of the patent application of the present utility model. All equivalent changes or modifications made under the technical spirit of the present utility model should fall within the patent scope covered by the present utility model.
Claims
1. A lightweight precast slab stair component with hollow treads and base plate, comprising a precast stair base plate (100) and treads (101), wherein the precast stair base plate (100) is provided with multiple levels of the treads (101), characterized in that: The system includes a PVC hollow tube (1), a steel mesh frame (2), and a concrete layer (3). The PVC hollow tube (1) is located inside the step (101) and extends along the length of the step (101). The steel mesh frame (2) is located inside the precast stair base plate (100) and extends along the length of the precast stair base plate (100). The concrete layer (3) is poured into the precast stair base plate (100) and the step (101), and the concrete layer (3) covers the PVC hollow tube (1) and the steel mesh frame (2).
2. A lightweight precast slab staircase component with hollow treads and base plate as described in claim 1, characterized in that: It also includes a polyethylene foam board (4), which is located inside the precast stair base plate (100) and extends along the length of the precast stair base plate (100), and the polyethylene foam board (4) is embedded in the steel mesh frame (2).
3. A lightweight precast slab staircase component with hollow treads and base plate as described in claim 2, characterized in that: The number of polyethylene foam boards (4) is two, and the two polyethylene foam boards (4) are placed at intervals along the width direction of the prefabricated stair base plate (100).
4. A lightweight precast slab staircase component with hollow treads and base plate as described in claim 1, characterized in that: The steel mesh frame (2) includes two end stirrup frames (5) and a middle steel mesh frame (6). The two end stirrup frames (5) are located at opposite ends of the precast stair base plate (100) and both end stirrup frames (5) are parallel to the horizontal line. The middle steel mesh frame (6) is located inside the precast stair base plate (100) and connects the two end stirrup frames (5).
5. A lightweight precast slab staircase component with hollow treads and base plate as described in claim 4, characterized in that: The central steel reinforcement mesh (6) includes several longitudinal bars (51) and several stirrups (52). Several longitudinal bars (51) connect two end stirrup frames (5). Several stirrups (52) are spaced apart along the length direction of the longitudinal bars (51) and are all welded to the several longitudinal bars (51).
6. A lightweight precast slab staircase component with hollow treads and base plate as described in claim 5, characterized in that: The end stirrup frame (5), the longitudinal bar (51) and the stirrup (52) are all made of HRB400 grade steel bars.
7. A lightweight precast slab staircase component with hollow treads and base plate as described in claim 1, characterized in that: The concrete layer (3) is obtained by pouring C30 grade concrete.