Prestressed concrete stair

Abstract

This utility model relates to the field of precast concrete technology and discloses a prestressed concrete staircase, including precast components. N precast components are provided, where N≥1. Each precast component includes a precast stair slab. Multiple through-holes are formed on both symmetrical sides of the precast stair slab, and a connecting portion is provided inside each of the first precast holes. The connecting portion includes a threaded rod with two first threaded rings screwed onto it. One end of the threaded rod protrudes outward to form a connector, and the other end is recessed to form a connecting hole. The connector matches the connecting hole. This utility model, by setting precast stair slabs, first precast holes, threaded rods, and first threaded rings, allows for on-site adjustment of the number of precast stair slabs according to actual needs, resulting in high applicability. Furthermore, when producing precast stair slabs, there is no need to pre-prepare templates for different specifications of stair slabs, reducing the cost of the device and improving its ease of use.

Description

Technical Field

[0001] This utility model relates to the field of precast concrete technology, and in particular to a prestressed concrete staircase. Background Technology

[0002] In the field of construction engineering, staircases, as an indispensable vertical transportation channel in multi-story buildings, directly affect the safety and comfort of the building's use due to their structural performance. With the continuous development of construction technology and the increasing demands for building quality, traditional staircase structures have gradually revealed numerous problems. Traditional cast-in-place staircase construction methods were once widely used in construction projects, but they suffer from a series of insurmountable defects. First, the long construction period is one of its significant problems. Cast-in-place staircases require the construction of complex formwork systems on-site. From formwork installation and rebar tying to concrete pouring and curing, each step consumes a significant amount of time. Especially during formwork installation and removal, not only is the labor intensity high, but it is also easily affected by environmental factors such as weather. In case of severe weather, the construction progress will be severely impacted. Second, the large amount of formwork used is also a major problem with cast-in-place staircases. To ensure the accuracy of the staircase's shape and dimensions, a large amount of timber or steel is needed to make formwork. This not only increases project costs but also wastes resources. At the same time, the large amount of formwork stacking and transportation also occupies a significant amount of space and manpower, making on-site management difficult. Furthermore, the prevalence of wet work on-site is another prominent issue with cast-in-place staircases. The concrete pouring process generates a large amount of cement slurry and dust, causing serious pollution to the construction site environment and affecting the health of construction workers. Furthermore, wet work easily leads to quality problems such as honeycomb and pitting on the staircase surface, requiring secondary repairs and further increasing project costs and construction time. To address these issues, precast stairs have emerged. However, existing precast concrete stairs also have some shortcomings. Although they do not require on-site formwork, they still need to be pre-measured and prefabricated at the manufacturing site. Therefore, different sizes of formwork need to be prepared in advance during staircase production, resulting in high costs and significant limitations. Utility Model Content

[0003] This invention proposes a prestressed concrete staircase to solve the problem of the need to pre-prepare templates of different sizes.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a prestressed concrete staircase, comprising precast components, wherein N precast components are provided in total, N≥1, and each precast component includes a precast stair slab, wherein multiple through-holes are formed on both sides of the precast stair slab symmetrically along its length, and a detachable connecting part is provided inside the first precast hole.

[0005] The connecting portion includes a threaded rod on which two first threaded rings are screwed together for abutting the precast stair slab.

[0006] Preferably, one end of the threaded rod protrudes outward to form a connector, and the other end is recessed to form a connecting hole, wherein the connector matches the connecting hole.

[0007] Preferably, the precast stair slab is provided with connectors at both ends along its length. The connectors include a first connecting part embedded in the floor slab and a second connecting part embedded in the precast stair slab. The first connecting part and the second connecting part are detachably connected.

[0008] Preferably, the first connecting portion includes a first embedded plate, a side plate is fixedly connected to one side of the first embedded plate, and a base rod is fixedly connected to the top of the side plate.

[0009] Preferably, the second connecting part includes a second embedded plate, and a second reserved hole and a third reserved hole are formed at both ends of the prefabricated stair slab, respectively. The two second embedded plates are fixedly connected to the interior of the second reserved hole and the third reserved hole, and a through hole is opened on the second embedded plate. The through hole matches the base rod, and a detachable second threaded ring is screwed onto the base rod.

[0010] Preferably, the top of the prefabricated stair slab is recessed to form a handrail pre-reserved hole.

[0011] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0012] (1) By setting up prefabricated stair slabs, first reserved holes, threaded rods and first threaded rings, the number of prefabricated stair slabs can be adjusted on-site according to actual needs, which has high applicability. Moreover, when producing prefabricated stair slabs, there is no need to prepare templates for stair slabs of different specifications in advance, which reduces the cost of using the device and improves the convenience of using the device.

[0013] (2) By setting connectors and connecting holes at both ends of the threaded rod, the length of the threaded rod can be adjusted according to the actual construction scenario when adjusting the prefabricated stair slab, thereby further increasing the adjustment range of the prefabricated stair slab and further increasing the scope of use of the device. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1This is a perspective view of the present utility model;

[0016] Figure 2 This is one of the exploded views of the prefabricated component of this utility model;

[0017] Figure 3 This is the second exploded view of the prefabricated component of this utility model;

[0018] Figure 4 This is a perspective view of the connector of this utility model;

[0019] Figure 5 This is a perspective view of the present invention in use;

[0020] In the diagram: 1. Precast component; 11. Precast stair slab; 12. First reserved hole; 13. Connector; 14. Threaded rod; 15. First threaded ring; 16. Connecting hole; 17. Second reserved hole; 18. Third reserved hole; 19. Handrail reserved hole; 2. Connector; 21. First embedded plate; 22. Side plate; 23. Base rod; 24. Second embedded plate; 25. Second threaded ring; 26. Through hole. 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] This utility model provides, for example Figures 1-5 The prestressed concrete staircase shown includes a precast component 1, and there are N precast components 1 in total, where N≥1. The precast component 1 includes a precast stair slab 11. The precast stair slab 11 has multiple through first reserved holes 12 formed on both sides symmetrically along its own length direction. The first reserved holes 12 are provided with detachable connecting parts. The precast stair slab 11 is a prestressed concrete staircase.

[0023] The connecting part includes a threaded rod 14, on which two first threaded rings 15 are screwed together for abutting the precast stair slab 11.

[0024] With the above technical solution, when it is necessary to install stairs between two floor slabs, the precast stair slab 11 is placed on one side of another precast stair slab 11, and the required number of precast stair slabs 11 are placed in sequence according to the actual use scenario. The threaded rod 14 is passed through the first reserved hole 12 between the multiple precast stair slabs 11, and the two first threaded rings 15 are screwed to the two ends of the threaded rod 14. The first threaded rings 15 abut against the precast stair slabs 11, thereby connecting the multiple precast stair slabs 11. Then, the precast stair slabs 11 after the number has been adjusted are hoisted to the two floor slabs by a crane, and the precast stair slabs 11 are connected to the two floor slabs. Concrete is poured at the connection between two adjacent precast stair slabs 11, thereby completing the reinforcement of the precast stair slabs 11.

[0025] When multiple precast stair slabs 11 need to be connected, in order to increase the range of adjustment for the number of precast stair slabs 11, such as... Figures 1-3 As shown, one end of the threaded rod 14 protrudes outward to form a connector 13, and the other end is recessed to form a connecting hole 16, with the connector 13 matching the connecting hole 16.

[0026] In this embodiment, before adjusting the number of prefabricated stair slabs 11, a threaded rod 14 is placed at one end of another threaded rod 14, and the connector 13 at one end of the threaded rod 14 is screwed into the connecting hole 16 on the other threaded rod 14, thereby connecting the two threaded rods 14. Following the above steps, the required number of threaded rods 14 are connected. After adjusting the length of the threaded rods 14, the required number of prefabricated stair slabs 11 are placed sequentially according to the actual usage scenario, so that the first reserved holes 12 between the multiple prefabricated stair slabs 11 are aligned. Then, the threaded rod 14 with the adjusted length is passed through the first reserved holes 12 between the multiple prefabricated stair slabs 11, and the first threaded ring 15 is screwed into both ends of the threaded rod 14. The first threaded ring 15 clamps the prefabricated stair slabs 11 at the edge position, completing the adjustment of the prefabricated stair slabs 11. Then, the adjusted prefabricated stair slabs 11 are hoisted to the space between the two floors by a crane for laying.

[0027] In addition, regarding how the precast stair slab 11 is connected to the floor slab in this utility model, such as... Figures 1-5 As shown, the precast stair slab 11 is provided with connectors 2 at both ends along its length. The connectors 2 include a first connecting part embedded in the floor slab and a second connecting part embedded in the precast stair slab 11. The first connecting part and the second connecting part are detachably connected.

[0028] In this embodiment, when prefabricating the prefabricated stair slab 11, the second connecting part is embedded in the prefabricated stair slab 11. In addition, when building the floor slab, the first connecting part is embedded in the floor slab. After the number of prefabricated stair slabs 11 is adjusted, the prefabricated stair slabs 11 are hoisted between the two floor slabs by a crane and connected by the first connecting part and the second connecting part, thereby completing the installation of the prefabricated stair slab 11.

[0029] Specifically, in one embodiment, regarding the first connecting portion and the second connecting portion described above, as follows: Figures 1-5 As shown, the first connecting part includes a first embedded plate 21, a side plate 22 is fixedly connected to one side of the first embedded plate 21, and a base rod 23 is fixedly connected to the top of the side plate 22.

[0030] The second connection part includes a second embedded plate 24. The two ends of the precast stair slab 11 are respectively formed with a second reserved hole 17 and a third reserved hole 18. The two second embedded plates 24 are respectively fixedly connected to the interior of the second reserved hole 17 and the third reserved hole 18. A through hole 26 is opened on the second embedded plate 24. The through hole 26 matches the base rod 23. A detachable second threaded ring 25 is screwed onto the base rod 23.

[0031] In this embodiment, when producing the precast stair slab 11, the second embedded plate 24 is embedded into the precast stair slab 11, so that the second embedded plate 24 is fixedly connected to the inside of the second reserved hole 17 and the third reserved hole 18 on the precast stair slab 11. When building the floor slab, the first embedded plate 21 is embedded into the floor slab. After the number of precast stair slabs 11 is adjusted, the precast stair slabs 11 are hoisted between the two floor slabs by a crane. The floor slab supports the first embedded plate 21, and the first embedded plate 21 supports the side plate 22 and the base rod 23. The base rod 23 is inserted into the through hole 26 on the second embedded plate 24. Then, the second threaded ring 25 is screwed into the base rod 23 and the second embedded plate 24 is clamped by the second threaded ring 25, thereby completing the connection between the precast stair slab 11 and the floor slab. Then, concrete is poured into the connection between the precast stair slab 11 and the floor slab, thereby completing the installation of the precast stair slab 11.

[0032] Furthermore, in this utility model, after the precast stair slab 11 is installed, in order to facilitate the later installation of the handrail, such as... Figures 1-3 As shown, the top of the precast stair slab 11 is recessed to form a handrail reserved hole 19.

[0033] In this embodiment, after the prefabricated stair slab 11 is laid, the handrail is placed on the prefabricated stair slab 11, and the bolts are screwed through the handrail and screwed into the handrail pre-drilled hole 19 to complete the installation of the handrail. The handrail supports the people walking on the prefabricated stair slab 11, thereby improving the safety of the people walking.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A prestressed concrete staircase, comprising precast components (1), characterized in that: The prefabricated component (1) is provided in N, where N≥1, and the prefabricated component (1) includes a prefabricated stair slab (11). The prefabricated stair slab (11) has multiple through-holes (12) on both sides symmetrically along its own length direction. The first reserved hole (12) is provided with a detachable connecting part inside. The connecting part includes a threaded rod (14) on which two first threaded rings (15) for abutting against the precast stair slab (11) are screwed together.

2. A prestressed concrete staircase according to claim 1, characterized in that: One end of the threaded rod (14) protrudes outward to form a connector (13), and the other end is recessed to form a connecting hole (16). The connector (13) matches the connecting hole (16).

3. A prestressed concrete staircase according to claim 1 or 2, characterized in that: The precast stair slab (11) is provided with connectors (2) at both ends along its length. The connectors (2) include a first connecting part embedded in the floor slab and a second connecting part embedded in the precast stair slab (11). The first connecting part and the second connecting part are detachably connected.

4. A prestressed concrete staircase according to claim 3, characterized in that: The first connecting part includes a first embedded plate (21), a side plate (22) is fixedly connected to one side of the first embedded plate (21), and a base rod (23) is fixedly connected to the top of the side plate (22).

5. A prestressed concrete staircase according to claim 4, characterized in that: The second connection part includes a second embedded plate (24). The prefabricated stair slab (11) has a second reserved hole (17) and a third reserved hole (18) formed at both ends. The two second embedded plates (24) are fixedly connected to the interior of the second reserved hole (17) and the third reserved hole (18), and a through hole (26) is opened on the second embedded plate (24). The through hole (26) matches the base rod (23), and a detachable second threaded ring (25) is screwed onto the base rod (23).

6. A prestressed concrete staircase according to claim 1 or 2, characterized in that: The top of the prefabricated stair slab (11) is recessed to form a handrail reserved hole (19).

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