Cast-in-place concrete scissor type sliding support plate type stair structure
By using a cast-in-place concrete scissor-type sliding support slab staircase structure, the staircase is divided and gaps and sliding supports are set, which solves the problem of scissor-type staircases being easily damaged in earthquakes, and achieves structural lightweighting and improved safety.
Patent Information
- Application Number
- CN202423081712.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-13
AI Technical Summary
Scissor staircases are vulnerable to earthquake damage in multi-story and high-rise buildings, leading to delays in evacuation and rescue. Existing staircase designs have failed to effectively reduce the impact of stiffness on the structure.
The staircase adopts a cast-in-place concrete scissor-type sliding support slab structure. The staircase is divided into first and second slab staircases by the middle stair beam, and a joint is set between the structural surfaces of the starting steps. The sliding supports and polytetrafluoroethylene plates are used to reduce seismic forces and reduce the self-weight and horizontal load of the structure.
It effectively reduces the damage of earthquake forces to stairs, reduces structural internal forces, improves the smoothness and aesthetics of building surfaces, and ensures the durability and safety of sliding supports.
Smart Images
Figure CN223675709U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to building structure technical field, concretely is a cast-in-situ concrete scissors type sliding support plate type stair structure. BACKGROUND
[0002] Stairwell as important emergency escape vertical passage, scissors type stair is applied universally in many high-rise buildings, and is vertical two evacuation passages, when strong earthquake occurs, the damage of stairwell (including stair plate) can delay personnel evacuation and rescue work, thereby causing serious casualties.
[0003] In the past earthquake damage investigation, it is found that when the stairwell of the frame part in frame structure and frame-shear wall structure is designed as beam type or plate type stair, most of them are seriously damaged, the influence of stair stiffness on the overall structure should be considered from the design, the influence of the tension and compression force generated by the stair under the action of earthquake on the frame column is avoided, the sliding support mode of the stair can avoid forming the ladder plate support and weakening the stiffness, when under the action of earthquake, the earthquake damage force is released, the influence of the stair on the frame is eliminated, and the safety of the structure is improved. SUMMARY
[0004] The utility model discloses a cast-in-situ concrete scissors type sliding support plate type stair structure to solve the problem in the background art.
[0005] To achieve the above object, the utility model provides the following technical scheme: a cast-in-situ concrete scissors type sliding support plate type stair structure, including first plate type stair, second plate type stair, platform ladder beam, first cantilevered plate, middle ladder column, middle ladder beam, second cantilevered plate and sliding support, the first plate type stair top end is supported on middle ladder beam, the first plate type stair bottom end is supported on the first cantilevered plate of platform ladder beam through sliding support, the second plate type stair top end is supported on platform ladder beam, the second plate type stair bottom end is supported on the second cantilevered plate of middle ladder beam through sliding support, the first plate type stair and second plate type stair starting step structure surface are provided with the seam between building surface layer.
[0006] Preferably, the middle ladder beam is supported on the middle ladder column, and the scissors type stair is divided into the first plate type stair and the second plate type stair.
[0007] Preferably, the sliding support structure of the first plate type stair and the second plate type stair includes the first cantilevered plate, the second cantilevered plate and the polytetrafluoroethylene plate, and the polytetrafluoroethylene plate is fixed at the top end of the first cantilevered plate and the second cantilevered plate through the flat head screw or the steel nail.
[0008] Preferably, the overhanging length of the first and second overhanging plates is not less than the step width of the first and second plate staircases, the horizontal width of the first and second overhanging plates is the same as the tread width of the first and second plate staircases, and the thickness of the first and second overhanging plates is not less than the thickness of the first and second plate staircases.
[0009] Preferably, the steel reinforcement framework of the first plate staircase supporting the first overhanging plate comprises first force steel and distribution steel, the first force steel extends into the staircase platform plate and serves as the upper steel reinforcement of the staircase platform plate, and the first overhanging plate, the platform stringer and the staircase platform plate are integrally cast.
[0010] Preferably, the steel reinforcement framework of the sliding support of the second plate staircase supporting the second overhanging plate comprises second force steel and distribution steel, the second force steel is anchored in the middle stringer, and the second overhanging plate and the middle stringer are integrally cast with the first plate staircase.
[0011] Preferably, the joint width is 50 mm, and the joint is filled with flexible material polystyrene board with the same thickness as the building surface layer.
[0012] Compared with the prior art, the present application has the following beneficial effects:
[0013] 1. The cast-in-situ concrete shear type sliding support plate staircase structure, by setting the middle stringer, divides the shear type staircase into the first plate staircase and the second plate staircase, the traditional shear type staircase takes the whole step section as a whole, the staircase structure is greatly reduced in weight, the amount of concrete is reduced, the vertical load and the horizontal seismic force are reduced, and the internal force of the structure is further reduced.
[0014] 2. The cast-in-situ concrete shear type sliding support plate staircase structure, by connecting the high end of the first plate staircase with the middle stringer and connecting the low end of the first plate staircase with the upper surface of the platform stringer overhanging plate through the sliding support, and connecting the high end of the second plate staircase with the platform stringer and connecting the low end of the second plate staircase with the upper surface of the middle stringer overhanging plate through the sliding support, the earthquake force can be released, the damage of the earthquake force to the staircase is reduced, and the influence of the diagonal bracing between the staircases on the main structure is effectively blocked.
[0015] 3. The cast-in-situ concrete shear type sliding support plate staircase structure, the contact surface of the sliding support is made of polytetrafluoroethylene plate, graphite powder is laid between the upper and lower embedded steel plates, the polytetrafluoroethylene plate has the characteristics of high temperature resistance, low temperature resistance, corrosion resistance and long service life, and the construction operation is simple, and the safety of the contact surface of the sliding support can be ensured for a long time.
[0016] 4. The cast-in-place concrete scissor sliding support plate stair structure, the gap between the starting step structure surface of the first plate stair and the second plate stair and the building surface layer is provided, the sliding space is reserved, the flexible material polystyrene board is filled in the gap, the relative movement between the stair and the main structure within a certain range can be met, and the flatness and appearance of the building surface are improved. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a whole structure schematic view of the utility model;
[0018] Figure 2 It is a whole structure plane arrangement schematic view of the utility model;
[0019] Figure 3 It is a whole structure section schematic view of the utility model;
[0020] Figure 4 It is a sliding support structure schematic view of the first plate stair of the utility model;
[0021] Figure 5 It is a sliding support structure schematic view of the second plate stair of the utility model.
[0022] In the drawing: 1, first plate stair; 2, second plate stair; 3, platform ladder beam; 4, first cantilever plate; 5, middle ladder column; 6, middle ladder beam; 7, second cantilever plate; 8, sliding support; 9, polytetrafluoroethylene plate; 10, first stress reinforcement; 11, distribution reinforcement; 12, stair platform plate; 13, gap; 14, building surface layer; 15, second stress reinforcement. DETAILED DESCRIPTION
[0023] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.
[0024] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "another end" and the like is the orientation or position relationship shown based on the drawing, and is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0025] As Figures 1 to 5 shown, the cast-in-place concrete scissors sliding support plate stair structure of the present embodiment includes a first plate stair 1, a second plate stair 2, a platform stringer 3, a first cantilever plate 4, a middle stringer 5, a middle stringer 6, a second cantilever plate 7, and a sliding support 8, as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, the top end of the first plate stair 1 is supported on the middle stringer 6, the bottom end of the first plate stair 1 is supported on the first cantilever plate 4 of the platform stringer 3 through the sliding support 8, the top end of the second plate stair 2 is supported on the platform stringer 3, the bottom end of the second plate stair 2 is supported on the second cantilever plate 7 of the middle stringer 6 through the sliding support 8, and a gap 13 is provided between the starting step structure surface of the first plate stair 1 and the second plate stair 2 and the building surface layer 14, the width of the gap 13 is fifty millimeters, and the gap 13 is filled with flexible material polystyrene board with the same thickness as the building surface layer 14.
[0026] Specifically, the middle stringer 6 is supported on the middle stringer 5, dividing the scissors stair into the first plate stair 1 and the second plate stair 2.
[0027] Further, the sliding support 8 structure of the first plate stair 1 and the second plate stair 2 includes the supported first cantilever plate 4, the second cantilever plate 7, and a polytetrafluoroethylene plate 9, which is fixed at the top end of the first cantilever plate 4 and the second cantilever plate 7 through flat head screws or steel nails.
[0028] Further, the overhanging length of the first cantilever plate 4 and the second cantilever plate 7 is not less than the step width of the first plate stair 1 and the second plate stair 2, the horizontal width of the first cantilever plate 4 and the second cantilever plate 7 is the same as the step width of the first plate stair 1 and the second plate stair 2, and the thickness of the first cantilever plate 4 and the second cantilever plate 7 is not less than the thickness of the first plate stair 1 and the second plate stair 2.
[0029] Further, the steel reinforcement framework of the first plate stair 1 supporting the first cantilever plate 4 includes first force steel bars 10 and distribution steel bars 11, the first force steel bars 10 extend into the stair platform plate 12 and serve as the upper steel bars of the stair platform plate 12, and the first cantilever plate 4, the platform stringer 3, and the stair platform plate 12 are integrally poured and formed.
[0030] Further, the steel reinforcement framework of the sliding support 8 of the second plate stair 2 supporting the second cantilever plate 7 includes second force steel bars 15 and distribution steel bars 11, the second force steel bars 15 are anchored in the middle stringer 6, and the second cantilever plate 7, the middle stringer 6, and the first plate stair 1 are integrally poured and formed.
[0031] The use method of the embodiment is: first, supporting the concrete member on site, then binding the steel bars, then pouring the concrete, finally curing, laying the polytetrafluoroethylene plate 9 and fixing after the supporting concrete member is poured, the steps are: first, lofting, then processing the polytetrafluoroethylene plate 9, cleaning the contact surface after processing is completed, then installing the polytetrafluoroethylene plate 9 in the predetermined position, finally, supporting the ladder section above the supporting surface on site, then cleaning the surface of the polytetrafluoroethylene plate 9, binding the steel bars again, then pouring the concrete, and curing.
[0032] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the present application is described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can be modified to the technical solutions recorded in the foregoing embodiments, or equivalent replacement for part of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A cast-in-situ concrete scissor slide support plate stair structure, characterized by: The first plate stair (1) is supported on the middle stair beam (6) at the top end, and is supported on the first cantilever plate (4) of the platform stair beam (3) through the sliding support (8) at the bottom end; the second plate stair (2) is supported on the platform stair beam (3) at the top end, and is supported on the second cantilever plate (7) of the middle stair beam (6) through the sliding support (8) at the bottom end; the starting step structure surface of the first plate stair (1) and the second plate stair (2) is provided with a gap (13) between the building surface layer (14).
2. The cast-in-place concrete scissor slide support plate stair structure according to claim 1, characterized in that: The middle stair beam (6) is supported on the middle stair column (5), and divides the scissors type stair into the first plate stair (1) and the second plate stair (2).
3. The cast-in-place concrete scissor slide support plate stair structure according to claim 1, characterized in that: The sliding support (8) structure of the first plate stair (1) and the second plate stair (2) comprises the supported first cantilever plate (4), the second cantilever plate (7) and the polytetrafluoroethylene plate (9), and the polytetrafluoroethylene plate (9) is fixed at the top end of the first cantilever plate (4) and the second cantilever plate (7) through the flat head screw or the steel nail.
4. The cast-in-place concrete scissor slide support platform stair structure of claim 1, wherein: The overhanging length of the first cantilever plate (4) and the second cantilever plate (7) is not less than the step width of the first plate stair (1) and the second plate stair (2), the horizontal width of the first cantilever plate (4) and the second cantilever plate (7) is the same as the stair section width of the first plate stair (1) and the second plate stair (2), and the thickness of the first cantilever plate (4) and the second cantilever plate (7) is not less than the thickness of the stair plate of the first plate stair (1) and the second plate stair (2).
5. The cast-in-place concrete scissor slide support platform stair structure of claim 1, wherein: The steel reinforcement framework of the first cantilever plate (4) supported by the first plate stair (1) comprises the first stress reinforcement (10) and the distribution reinforcement (11), the first stress reinforcement (10) extends into the stair platform plate (12) and serves as the upper reinforcement of the stair platform plate (12), and the first cantilever plate (4), the platform stair beam (3) and the stair platform plate (12) are integrally poured and formed.
6. The cast-in-place concrete scissor slide support platform stair structure of claim 1, wherein: The steel reinforcement framework of the second cantilever plate (7) supported by the sliding support (8) of the second plate stair (2) comprises the second stress reinforcement (15) and the distribution reinforcement (11), the second stress reinforcement (15) is anchored in the middle stair beam (6), and the second cantilever plate (7), the middle stair beam (6) and the first plate stair (1) are integrally poured and formed.
7. The cast-in-place concrete scissor slide support platform stair structure of claim 1, wherein: The gap (13) has a width of 50 mm, and is filled with flexible material polyphenyl plate with the same thickness as the building surface layer (14).