Adjustable stair step hanging formwork structure reinforced through root of shear wall

Abstract

The utility model relates to an adjustable stair step hanging formwork structure reinforced through the root of a shear wall, and belongs to the technical field of building engineering stair construction. Aiming at the problems of insufficient stability, low rigidity, high manufacturing cost of a customized stair step shaping steel template and the like of the existing bulk wood template, the utility model provides a step template assembly, an adjustable supporting assembly and a fixing assembly, the adjustable supporting assembly is arranged at the end part of the step template assembly, and the fixing assembly is arranged at the root part of a shear wall; the step formwork assembly is connected with the fixing assembly through the adjustable supporting assembly, the adjustable supporting assembly is connected with the fixing assembly through the fastening bolt, adaptive adjustment can be carried out according to the designed height of the stair step, and the stair step formwork assembly can be suitable for stair construction of different step sizes. The stair formwork is simple in structure manufacturing and low in manufacturing cost, effectively overcomes the defects that a wooden formwork is low in reinforcing rigidity and prone to deformation and a shaped steel formwork is high in manufacturing cost, and is suitable for being widely applied to stair construction projects.

Description

Technical Field

[0001] The utility model relates to the technical field of stair construction in building engineering, in particular to an adjustable stair step hanging formwork structure reinforced by the root of a shear wall. Background Art

[0002] Stairs are an important part of multi-story and high-rise buildings. Due to the load-bearing and fire-proof requirements, reinforced concrete stairs are generally used. When building stairs, they are divided into cast-in-place and prefabricated types according to different construction methods. Cast-in-place stairs have the advantages of flexible layout and easy to meet different building requirements, and are widely used in construction projects.

[0003] Traditional cast-in-place stairs usually use loose-jointed wooden formwork for reinforcement and support, but the loose-jointed wooden formwork is not stable enough and has low rigidity. It is easy to deform during construction, and its feasibility is poor when one side of the stair tread is a shear wall. There are many uncontrollable factors in the quality of the cast stairs. In this regard, customized stair tread standardized steel formwork and supporting extensions and reinforcements can solve the reinforcement problem. However, this method is relatively expensive for the construction of stairs with different sizes and heights in multiple different projects.

[0004] In view of this, it is particularly important to design a stair tread formwork structure that uses shear walls as support and reinforcement and is suitable for different step sizes. Utility Model Content

[0005] In view of the defects existing in the above-mentioned prior art, the purpose of the utility model is to propose an adjustable stair tread hanging formwork structure reinforced by the root of the shear wall. The formwork structure is firmly fixed as a whole by means of the double steel tube back ribs arranged at the root of the shear wall and the adjustable supporting fixing rods of the step formwork, thereby solving the problems of low reinforcement rigidity and easy deformation of traditional wooden formworks. The utility model is simple to manufacture and low in cost, overcomes the defect of high price of standardized steel formworks, and effectively solves the problems existing in the background technology.

[0006] In order to achieve the above technical objectives, the utility model adopts the following technical solutions:

[0007] An adjustable stair tread hanging formwork structure reinforced by the root of a shear wall comprises a tread formwork assembly, an adjustable supporting assembly and a fixing assembly, wherein the adjustable supporting assembly is arranged at the end of the tread formwork assembly, the fixing assembly is arranged at the root of the shear wall, and the tread formwork assembly is connected to the fixing assembly via the adjustable supporting assembly.

[0008] As a further preferred embodiment of the above technical solution, the tread formwork assembly includes an inner plate, an outer plate and support ribs, the inner plate is arranged on the vertical surface of the stair tread, the inner plate is arranged parallel to the outer plate and the two are fixedly connected by support ribs.

[0009] By adopting the above solution, further, the inner side plate is arranged at the same height as the stair tread, and the height of the outer side plate is 15-20 mm lower than the stair tread.

[0010] By adopting the above solution, further, the supporting ribs include upper supporting ribs and lower supporting ribs, the upper supporting ribs and the lower supporting ribs are both connected between the inner plate and the outer plate, and the upper plane of the upper supporting ribs and the lower plane of the lower supporting ribs do not exceed the top surface and the bottom surface of the outer plate respectively.

[0011] As a further preferred solution of the above technical solution, the adjustable support assembly includes a horizontal support rod, a vertical support rod and a diagonal support rod fixedly connected to the horizontal support rod. The horizontal support rod is arranged at the bottom of the outer plate and connected to the inner plate, and the upper ends of the vertical support rod and the diagonal support rod are respectively connected to the fixed assembly.

[0012] By adopting the above solution, further, the vertical support rod is closely arranged with the outer side plate, and the lower end of the diagonal support rod is hinged with the vertical support rod.

[0013] As a further preferred solution of the above technical solution, the fixing assembly includes a square steel pipe, a double steel pipe back rib, a mountain-shaped clip and a reserved screw. The lower end of the double steel pipe back rib is fixedly connected to the square steel pipe, and the upper end of the double steel pipe back rib is connected to the shear wall through the mountain-shaped clip.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The hanging formwork structure of the utility model is reinforced with the help of shear walls. The step formwork assembly is accurately and firmly positioned through the adjustable support assembly. The step formwork assembly is stable and not easy to deform, which helps to improve the construction quality of stair treads and improves the problem that the traditional loose-jointed wooden formwork system cannot be reinforced due to the influence of shear walls and the reinforcement stability is insufficient.

[0016] 2. The structure of the utility model does not need to be specially customized, has a low cost, and effectively avoids the high cost defect of customizing the standardized steel formwork of the stair treads and the matching extension pieces and reinforcement pieces.

[0017] 3. The adjustable support assembly of the utility model is fixed to the square steel pipe by fastening bolts, and can be adaptively adjusted according to the design height of the stair treads. It is applicable to the construction of stairs with different step sizes. At the same time, the overall weight of the hanging formwork structure is light, and it is easy to disassemble and assemble, and it is easy to use, which is in line with the concept of green construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the following briefly introduces the drawings required for use in the embodiment.

[0019] Figure 1It is a schematic diagram of the overall use state of an adjustable stair step hanging formwork structure reinforced by the root of a shear wall according to the utility model;

[0020] Figure 2 It is a structural front view of the utility model;

[0021] Figure 3 It is a top view of the structure of the utility model (excluding the square wood pad);

[0022] Figure 4 It is a structural schematic diagram of the step template assembly of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the adjustable support assembly of the utility model;

[0024] In the figure: 1. Step formwork assembly; 11. Inner plate; 12. Outer plate; 13. Support rib; 131. Upper support rib; 132. Lower support rib; 2. Adjustable support assembly; 21. Horizontal support rod; 22. Vertical support rod; 23. Diagonal support rod; 24. Fastening bolts; 3. Fixing assembly; 31. Square steel pipe; 32. Double steel pipe back rib; 33. Mountain-shaped card; 34. Reserved screw; 35. Matching nut; 4. Shear wall; 5. Square wood pad. DETAILED DESCRIPTION

[0025] 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. Obviously, the described embodiments are only part of the embodiments, not all of the embodiments. For ordinary technicians in this field, other embodiments can also be obtained without paying creative work.

[0026] The hanging formwork structure of the utility model is designed according to the Western Science and Technology Innovation Plaza project (located at the southwest corner of the intersection of Fengdong Avenue and Keyuan Fourth Road in Fengdong New Town, Xixian New District, Shaanxi Province). The four main buildings of the project have a total of 16 staircases, which are mainly arranged in the core tube of the main building. They are all cast-in-place slab stairs. The design width of the stair tread is mainly 1325mm, 1400mm, and 1475mm. The thickness of the stair tread is 130mm, the thickness of the platform plate is 120mm, the step width is 260mm, and the step height is 200mm. The heights of the stair treads are 150mm, 159mm, and 163mm. The heights of the stair treads are different, and one side of the stair treads is a shear wall in many places. The stability of the reinforcement using the traditional loose-fitting wooden formwork system is insufficient. Therefore, the utility model is designed to have a hanging formwork structure with adjustable stair tread height reinforced by the root of the shear wall. By adjusting the connection positions of the vertical support rods and the diagonal support rods and the square steel pipes, the requirements of different stair tread heights in the project can be met, and the positioning is accurate and firm, which can improve the construction quality of the stairs. Embodiment 1:

[0027] Reference Figure 1-5 The utility model provides an adjustable stair tread hanging formwork structure reinforced by the root of a shear wall, comprising a tread formwork assembly 1, an adjustable supporting assembly 2 and a fixing assembly 3. The adjustable supporting assembly 2 is connected to the tread formwork assembly 1 near one end of the shear wall 4, and the fixing assembly 3 is detachably connected to the root of the shear wall 4. The tread formwork assembly 1 is connected to the fixing assembly 3 through the adjustable supporting assembly 2. In this embodiment, the tread formwork assembly 1 and the adjustable supporting assembly 2 in the accompanying drawings are only two schematic ones. In actual applications, the tread formwork assembly 1 and the adjustable supporting assembly 2 are both multiple and matched with each other. During on-site construction operations, the adjustable supporting assembly 2 is installed with the fixing assembly 3 according to the step height requirements, so that the stair tread height cast according to the step formwork assembly 1 in this state meets the design requirements.

[0028] Specifically, the step formwork assembly 1 includes an inner panel 11, an outer panel 12 and a support rib 13. Both the inner panel 11 and the outer panel 12 are made of 15 mm thick coated mirror panels. The inner panel 11 is arranged at the vertical surface of each stair tread, and the lengths of the inner panel 11 and the outer panel 12 are synchronized with the stair treads. The inner panel 11 and the outer panel 12 are arranged in parallel and the two are fixedly connected by the support rib 13. The support rib 13 is made of 50*50 wooden squares. In the present embodiment, two support ribs 13 are arranged, including an upper support rib 131 and a lower support rib 132. The upper support rib 131 and the lower support rib 132 are nailed between the inner panel 11 and the outer panel 12. The support rib 13 reinforces the inner panel 11 to prevent the inner panel 11 from deforming during the concrete pouring process, thereby effectively ensuring the construction quality of the stair treads.

[0029] Furthermore, if Figure 2 , Figure 4 As shown, the inner plate 11 is set at the same height as the stair treads, and the height of the outer plate 12 is 15-20 mm lower than the stair treads. When installing the outer plate 12, the top of the outer plate 12 is flush with the horizontal plane of the stair treads, and the bottom is suspended in the air to facilitate the finishing work of the stair treads after the concrete pouring is completed.

[0030] In this embodiment, the upper rib 131 and the lower rib 132 are both the same length as the stair treads, and the upper plane of the upper rib 131 and the lower plane of the lower rib 132 are flush with the top surface and the bottom surface of the outer plate 12 respectively.

[0031] like Figure 2 , Figure 5As shown, the adjustable support assembly 2 includes a transverse support rod 21, a vertical support rod 22 and an oblique support rod 23. The transverse support rod 21 is arranged and supported at the bottom of the outer plate 12. The end of the transverse support rod 21 is fixedly mounted on the inner plate 11. The vertical support rod 22 is tightly attached to the outer plate 12 and fixedly connected to the two by fasteners (such as screws, etc.). The bottom of the vertical support rod 22 is welded to the other end of the transverse support rod 21. The lower end of the oblique support rod 23 is hingedly connected to the lower end of the vertical support rod 22. The upper end of the vertical support rod 22 and the upper end of the oblique support rod 23 are respectively connected to the fixing assembly 3.

[0032] Specifically, in the present embodiment, the horizontal supporting rod 21, the vertical supporting rod 22 and the diagonal supporting rod 23 are all made of 14 round steel, and the upper end of the diagonal supporting rod 23 is set to an M14 screw structure, and the diagonal supporting rod 23 is fixed with a fastening bolt 24 at the connection between the diagonal supporting rod 23 and the fixing assembly 3, so that the force on the step template assembly 1 is transmitted to the fixing assembly 3 as a whole; due to the ingenious setting of the utility model and the use of the matching structure of the screw and the nut, the height is adjustable, which can be applied to different step sizes and heights, and the reinforcement of the template can be accurate in position, firm and reliable; during use, the step ladder template 1 is clamped by the adjustable supporting assembly 2, and when fixing the fastening bolt 24, a steel gasket needs to be set and the fastening bolt 24 needs to be locked to prevent the fastening bolt 24 from breaking off due to excessive force on the template during construction.

[0033] like Figure 1-2 As shown, the fixing assembly 3 includes a square steel tube 31, a double steel tube back rib 32, a mountain-shaped clamp 33 and a reserved screw 34. The lower end of the double steel tube back rib 32 is fixedly welded to the square steel tube 31. The reserved screw 34 is cast at an appropriate position of the shear wall 4 during the construction of the shear wall 4. The upper end of the double steel tube back rib 32 is connected to the reserved screw 34 through the mountain-shaped clamp 33 and the matching nut 35. Two square wood pads 5 are fixedly installed between the double steel tube back rib 32 and the shear wall 4. The two square wood pads 5 are respectively located on the upper and lower sides of the reserved screw 34. The square wood pads 5 match the thickness of the square steel tube 31. The layout angle of the square steel tube 31 is consistent with the overall trend of the stairs. The angle of the square steel tube 31 is adapted to the angle of the square steel tube 31, and a plurality of holes are drilled longitudinally along the length direction of the square steel tube 31, which are respectively used to insert the vertical support rods 22 and the diagonal support rods 23. When it is necessary to build stair treads of different heights, the angle between the diagonal support rods 23 and the vertical support rods 22 is adjusted so that the vertical support rods 22 and the diagonal support rods 23 are inserted into the corresponding holes for fixation; the adjustable support assembly 2 is finally reinforced by the double steel tube back ribs 32 and the mountain-shaped clips 33 at the root of the shear wall 4, ensuring that the double steel tube back ribs 32 can fully withstand the force of the step formwork assembly 1 transmitted from the square steel tube 31, thereby ensuring the quality of the final staircase during the concrete pouring process. Embodiment 2:

[0034] An adjustable stair tread hanging formwork structure reinforced by the root of the shear wall is actually used on the construction site. Figure 1 :

[0035] First, according to the trend of the stairs to be built, the square steel tube 31 is connected to the lower end of the double steel tube back rib 32, and the double steel tube back rib 32 is clamped and installed on the reserved screw 34 using the mountain clamp 33 and the matching nut 35, so that the square steel tube 31 is attached to the shear wall 4;

[0036] Secondly, the step template assembly 1 and the adjustable support assembly 2 are fixedly connected to form a whole, so that the horizontal support rod 21 is fixedly connected to the inner side plate 11 and located at the bottom of the lower support rib 132, so as to support the step template assembly 1 as a whole;

[0037] Then, according to the height requirement of the stair treads, the vertical support rods 22 and the diagonal support rods 23 are passed through the holes on the square steel tube 31 and adjusted appropriately, and the diagonal support rods 23 are fixed to the square steel tube 31 with the fastening bolts 24, and one end of the step formwork assembly 1 away from the adjustable support assembly 2 is fixed to the formwork on the non-shear wall side to ensure the horizontal stability of the step formwork assembly 1;

[0038] Finally, pouring concrete starts from the step formwork assembly 1 at the bottom of the stairs, and the surface of each stair step is leveled accordingly. After the construction is completed, the hanging formwork structure of the utility model can be removed.

[0039] It should be clear that the above detailed description of the embodiments of the utility model provided in the accompanying drawings is only used to further illustrate the utility model, and is not intended to limit the scope of the utility model claimed for protection, but only represents selected embodiments of the utility model. Based on the embodiments of the utility model, some non-essential improvements and adjustments made by ordinary technicians in this field according to the above content of the utility model belong to the protection scope of the utility model.

Claims

1. An adjustable stair tread hanging formwork structure reinforced by the root of the shear wall. It is characterized in that The invention comprises a step formwork component (1), an adjustable support component (2) and a fixing component (3), wherein the adjustable support component (2) is arranged at the end of the step formwork component (1), and the fixing component (3) is arranged at the root of the shear wall (4), and the step formwork component (1) is connected to the fixing component (3) via the adjustable support component (2).

2. The adjustable stair tread hanging formwork structure reinforced by the root of the shear wall according to claim 1, It is characterized in that The tread template assembly (1) comprises an inner plate (11), an outer plate (12) and a support rib (13); the inner plate (11) is arranged on a vertical surface of a stair tread; the inner plate (11) and the outer plate (12) are arranged in parallel and are fixedly connected via the support rib (13).

3. The adjustable stair tread hanging formwork structure reinforced by the root of the shear wall according to claim 2, It is characterized in that The inner plate (11) is arranged at the same height as the stair tread, and the outer plate (12) is 15-20 mm lower than the stair tread.

4. The adjustable stair tread hanging formwork structure reinforced by the root of the shear wall according to claim 2, It is characterized in that The supporting ribs (13) include upper supporting ribs (131) and lower supporting ribs (132), the upper supporting ribs (131) and the lower supporting ribs (132) are both connected between the inner plate (11) and the outer plate (12), and the upper plane of the upper supporting ribs (131) and the lower plane of the lower supporting ribs (132) do not exceed the top surface and the bottom surface of the outer plate (12), respectively.

5. The adjustable stair tread hanging formwork structure reinforced by the root of the shear wall according to claim 2, It is characterized in that The adjustable support assembly (2) comprises a horizontal support rod (21), a vertical support rod (22) and an oblique support rod (23) fixedly connected to the horizontal support rod (21); the horizontal support rod (21) is arranged at the bottom of the outer plate (12) and connected to the inner plate (11); the upper ends of the vertical support rod (22) and the oblique support rod (23) are respectively connected to the fixed assembly (3).

6. The adjustable stair tread hanging formwork structure reinforced by the root of the shear wall according to claim 5, It is characterized in that The vertical support rod (22) is arranged closely to the outer side plate (12), and the diagonal support rod (23) is hinged to the vertical support rod (22).

7. The adjustable stair tread hanging formwork structure reinforced by the root of the shear wall according to claim 6, It is characterized in that The fixing assembly (3) comprises a square steel tube (31), a double steel tube back rib (32), a mountain-shaped clamp (33) and a reserved screw rod (34); the lower end of the double steel tube back rib (32) is fixedly connected to the square steel tube (31); and the upper end of the double steel tube back rib (32) is connected to the shear wall (4) via the mountain-shaped clamp (33).

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