A standardized and revolving stair tread steel formwork
By adopting standardized turnoverable stair step steel formwork and using tower crane to lift and adjust the height and horizontal position of the formwork, the problems of poor forming quality and slow construction speed in traditional wooden formwork construction are solved, and fast and convenient stair step construction is achieved.
Patent Information
- Application Number
- CN202323449927.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-18
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2033-12-18
AI Technical Summary
During the construction of traditional stair steps, the assembled ordinary wood formwork has poor molding quality, slow construction speed, and difficult to ensure the construction quality.
Standardized turnaroundable stair step steel formwork, which includes keel, step step steel formwork and adjustable support, and can be quickly installed and removed through tower crane lifting and adjusting the height and horizontal position of the formwork.
The construction speed and forming quality are improved, the turnover utilization rate of the formwork is high, and the installation and disassembly are convenient, which reduces the difficulty of quality control during construction.
Smart Images
Figure CN222731082U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of construction engineering, in particular to a standardized rotatable stair tread steel template. Background Art
[0002] Traditional stair tread construction uses assembled and spliced ordinary wooden formwork, which has poor molding quality and slow construction speed. The working staff go up and down and step on it, which makes it difficult to ensure the construction quality. Therefore, we must always pay attention to the construction. Utility Model Content
[0003] The utility model provides a standardized and rotatable stair tread steel template, which can be directly hoisted by a tower crane and rotated to the standard floor stair treads of each building for construction. It is easy to install and disassemble, has a fast construction speed and a high template turnover utilization rate.
[0004] A standardized rotatable stair tread steel formwork comprises a keel, a tread ladder steel formwork and an adjustable support. The tread ladder steel formwork is fixed in a height order under two mutually parallel keels. Through holes are respectively arranged at the upper and lower ends of the keels. The adjustable support is arranged on the keel through the through holes. The lower end of the adjustable support passes through the through holes to contact the upper and lower floors. The adjustable support is used to adjust the support height and horizontal position of the standardized stair tread steel formwork.
[0005] Furthermore, the step ladder steel formwork includes a stair tread back template, a vertical support, an upper back rib and a lower back rib, the upper back rib is welded and fixed to the upper edge of the stair tread back template, the lower back rib is welded and fixed to the lower edge of the stair tread back template, the upper back rib is provided with a notch, the vertical support is inserted into the notch, the vertical support and the upper back rib are welded and fixed to the keel.
[0006] Furthermore, the step ladder steel formwork also includes a horizontal reinforcement rod, one end of which is welded and fixed to the lower back rib, and the other end of which is welded and fixed to the keel.
[0007] Furthermore, the keel includes a handrail, an upper horizontal end and a lower horizontal end. The keel is formed in one piece. The upper and lower ends of the handrail are fixedly connected to the upper horizontal end and the lower horizontal end respectively. The upper horizontal end and the lower horizontal end are respectively provided with through holes. The two adjustable supports respectively pass through the through holes. The lower ends of the two adjustable supports respectively contact the upper floor level and the lower floor level.
[0008] Furthermore, the adjustable support includes an upper nut, a lower nut and a screw rod, the screw rod passes through a through hole, and the upper nut and the lower nut pass through the screw rod and are tightened at upper and lower positions of the through hole respectively.
[0009] Furthermore, it also includes four lifting rings, which are fixed at four symmetrical positions of two keels.
[0010] The utility model also discloses a standardized revolving stair step steel formwork construction method, comprising the following steps:
[0011] Step 1. Make standardized steel stair tread steel templates according to the detailed drawings of standard floor stairs: select the dimensions of each part of the standardized steel stair tread steel template according to the width and height of the treads, and weld and assemble them. The upper and lower back ribs are welded and fixed at the upper and lower edges of the stair tread back template. A notch is set on the upper back rib, and the vertical support is inserted into the notch. The vertical support and the upper back rib are welded and fixed to the keel. One end of the horizontal reinforcement rod is welded and fixed to the lower back rib, and the other end of the horizontal reinforcement rod is welded and fixed to the keel. Through holes are set at the upper and lower horizontal ends of the keel, and 4 adjustable supports are passed through the through holes. The nuts are tightened at the upper and lower ends of the through holes to position the adjustable supports. Fixed lifting rings are welded at 4 symmetrical positions of the 2 keels.
[0012] Step 2: Lay the bottom and side formworks of the slabs and tie the steel bars for the stairs: Set up the bottom formwork and side formworks of the stairs according to the design drawings. Minimize the joints of the bottom formworks to improve the quality of the concrete after later forming. Add wooden beams to the fixed parts where the side formworks meet the bottom formworks to ensure that the joints are straight. Glue or stick sponge strips to the necessary gaps to prevent leakage. Tie the steel bars on the bottom formworks of the stairs.
[0013] Step 3: Hoist the standardized stair tread steel formwork and adjust the horizontal and vertical degree of the standardized steel stair tread steel formwork: one end of the steel wire rope passes through the lifting ring, and the other end is fixed to the tower crane. Use the tower crane to place the standardized steel stair tread steel formwork on the bottom formwork. The lower ends of the four adjustable supports fixed on the keel are in contact with the upper and lower floor surfaces respectively. According to the thickness of the stair section plate, adjust the height of the four adjustable supports from the upper and lower floor slabs, and adjust the four adjustable supports to be in the same horizontal plane;
[0014] Step 4, concrete pouring: Before pouring concrete, apply the release agent to the standardized stair tread steel formwork. After the release agent is adjusted to a uniform ratio according to the corresponding matching ratio, use a brush or sprayer to brush or spray the release agent onto the standardized stair tread steel formwork. The release agent coverage layer is required to be uniform and comprehensive;
[0015] Step 5. Dismantling of standardized stair tread steel formwork: After the concrete strength meets the requirements, the standardized stair tread steel formwork will be quickly dismantled as a whole and transferred to other standard floors of other buildings or the next floor for use according to the construction schedule.
[0016] Furthermore, in step 4, concrete is poured. During the pouring process, the vibrating rod is avoided from vibrating the formwork. The concrete is poured from bottom to top, and the step surface is well finished.
[0017] Further, in step 5, the standardized stair tread steel formwork is removed and removed only after the strength meets the requirements. During the removal process of the standardized stair tread steel formwork, it is prohibited to hit it hard to avoid damaging the poured stair tread concrete. After the standardized stair tread steel formwork is removed, the finished product is protected in time, the concrete on the surface of the formwork is cleaned, and the standardized stair tread steel formwork is circulated to the next floor or other standard floors of other buildings for use, and the above steps are repeated.
[0018] The utility model has the following beneficial effects: the utility model provides a standardized stair step steel formwork and construction method, which can be installed and formed once and removed as a whole after pouring is completed. In addition to the steel formwork being not easily damaged and having a good forming effect, the utility model has a fast construction speed, convenient disassembly and assembly, and a high turnover utilization rate compared to the traditional wooden formwork. The utility model has the advantages of convenient installation, quick overall disassembly, small formwork deformation, many turnover times, convenient turnover, and good step forming effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a left view of a standardized revolving stair tread steel template installed between floors of the utility model;
[0020] Figure 2 It is a rear view of a single stair tread steel formwork in a standardized rotatable stair tread steel formwork of the utility model.
[0021] Explanation of symbols in the accompanying drawings:
[0022] 1. Keel, 2. Step steel formwork, 3. Adjustable support, 4. Upstairs level, 5. Downstairs level, 6. Stair step back formwork
[0023] 7. Vertical support, 8. Upper back rib, 9. Lower back rib, 10. Horizontal reinforcement rod, 11. Handrail, 12. Upper horizontal end, 13. Lower horizontal end. DETAILED DESCRIPTION
[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0025] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.
[0026] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0027] In the description of this patent, unless otherwise clearly specified and limited, if the term "connection" or the like appears to indicate the connection relationship between components, the term should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.
[0028] A standardized revolving stair tread steel formwork, such as Figure 1 to Figure 2 As shown, it includes a keel 1, a step ladder steel mold 2 and an adjustable support 3. The multiple step ladder steel molds 2 are fixed in a high and low order under two mutually parallel keels 1. The upper end and the lower end of the keel 1 are respectively provided with through holes. The adjustable support 3 is provided on the keel through the through holes. The lower end of the adjustable support passes through the through holes to contact the upper floor level 4 and the lower floor level 5. The adjustable support 3 is used to adjust the support height and horizontal positioning of the standardized stair step steel template.
[0029] The utility model discloses a standardized rotatable stair tread steel template for use in the construction of cast-in-place concrete structure stairs of standard floors of construction projects. The utility model only needs to adjust the height and horizontal positioning between the standardized stair tread steel template and the floor slab or stair rest platform by passing through the keel and setting up an adjustable support 3 on the floor slab or stair rest platform template, so as to adapt to the pouring of standard floors in different buildings. It is a tool-type rotatable stair tread template. The utility model has the advantages of convenient installation, quick overall dismantling, small template deformation, many turnover times, convenient turnover, and good step forming effect.
[0030] Further, if Figure 1 to Figure 2As shown, the step ladder steel formwork 2 includes a stair step back template 6, a vertical support 7, an upper back rib 8 and a lower back rib 9. The upper back rib 8 is welded and fixed to the upper edge of the stair step back template 6, and the lower back rib 9 is welded and fixed to the lower edge of the stair step back template 6. The upper back rib 8 is provided with a notch, and the vertical support 7 is inserted into the notch, and the vertical support 7 and the upper back rib 8 are welded and connected. The upper part of the vertical support 7 is welded and fixed to the keel 1. The stair step back template 6 is made of 3mm steel plate, with the smooth surface of the steel plate facing inward. The upper and lower ends of the stair step back template 6 are welded with a full-length L50×3 angle steel for reinforcement, that is, the upper back rib 8 is welded and fixed to the upper edge of the stair step back template 6, and the lower back rib 9 is welded and fixed to the lower edge of the stair step back template 6, so as to avoid collision during the hoisting and turnover process and cause deformation of the step steel plate. The upper back rib 8 is provided with a notch, the vertical support 7 is inserted into the notch, the vertical support 7 and the upper back rib 8 are welded and connected, and the upper part of the vertical support 7 is welded and fixed on the keel 1, completing the forming of the step ladder steel membrane 2 and the fixed connection between it and the keel 1.
[0031] Further, if Figure 1 to Figure 2 As shown, the step ladder steel formwork 2 also includes a horizontal reinforcement rod 10, one end of which is welded and fixed to the lower back rib, and the other end of which is welded and fixed to the keel 1. In order to make the standardized stair step steel formwork structure more solid, the horizontal reinforcement rod 10 is added.
[0032] Further, if Figure 1 to Figure 2 As shown, the keel 1 includes a handrail 11, an upper horizontal end 12 and a lower horizontal end 13. The keel 1 is integrally formed. The upper and lower ends of the handrail 11 are fixedly connected to the upper horizontal end 12 and the lower horizontal end 13, respectively. The upper horizontal end 12 and the lower horizontal end 13 are respectively provided with through holes. The two adjustable supports 3 pass through the through holes respectively. The lower ends of the two adjustable supports 3 are respectively in contact with the upper floor level 4 and the lower floor level 5. The above structure defines the structure of the keel 1 and the adjustable supports 3.
[0033] Further, if Figure 1 to Figure 2 As shown, the adjustable support 3 includes an upper nut, a lower nut and a screw rod, the screw rod passes through the through hole, and the upper nut and the lower nut pass through the screw rod and are tightened at the upper and lower positions of the through hole respectively. The upper and lower nuts are used to limit the fixed thread position, and the height between the standardized stair tread steel formwork and the overall floor slab can also be adjusted by rotating the screw rod and the upper and lower nuts at the two ends.
[0034] The utility model also discloses a standardized revolving stair step steel formwork construction method, comprising the following steps:
[0035] Step 1. Make standardized steel stair tread steel templates according to the detailed drawings of standard floor stairs: select the dimensions of each part of the standardized steel stair tread steel template according to the width and height of the treads, and weld and assemble them. The upper and lower back ribs are welded and fixed at the upper and lower edges of the stair tread back template. A notch is set on the upper back rib, and the vertical support is inserted into the notch. The vertical support and the upper back rib are welded and fixed to the keel. One end of the horizontal reinforcement rod is welded and fixed to the lower back rib, and the other end of the horizontal reinforcement rod is welded and fixed to the keel. Through holes are set at the upper and lower horizontal ends of the keel, and 4 adjustable supports are passed through the through holes. The nuts are tightened at the upper and lower ends of the through holes to position the adjustable supports. Fixed lifting rings are welded at 4 symmetrical positions of the 2 keels.
[0036] Step 2: Lay the bottom and side formworks of the slabs and tie the steel bars for the stairs: Set up the bottom formwork and side formworks of the stairs according to the design drawings. Minimize the joints of the bottom formworks to improve the quality of the concrete after later forming. Add wooden beams to the fixed parts where the side formworks meet the bottom formworks to ensure that the joints are straight. Glue or stick sponge strips to the necessary gaps to prevent leakage. Tie the steel bars on the bottom formworks of the stairs.
[0037] Step 3: Hoist the standardized stair tread steel formwork and adjust the horizontal and vertical degree of the standardized steel stair tread steel formwork: one end of the steel wire rope passes through the lifting ring, and the other end is fixed to the tower crane. Use the tower crane to place the standardized steel stair tread steel formwork on the bottom formwork. The lower ends of the four adjustable supports fixed on the keel are in contact with the upper and lower floor surfaces respectively. According to the thickness of the stair section plate, adjust the height of the four adjustable supports from the upper and lower floor slabs, and adjust the four adjustable supports to be in the same horizontal plane;
[0038] Step 4, concrete pouring: Before pouring concrete, apply the release agent to the standardized stair tread steel formwork. After the release agent is adjusted to a uniform ratio according to the corresponding matching ratio, use a brush or sprayer to brush or spray the release agent onto the standardized stair tread steel formwork. The release agent coverage layer is required to be uniform and comprehensive;
[0039] Step 5. Dismantling of standardized stair tread steel formwork: After the concrete strength meets the requirements, the standardized stair tread steel formwork will be quickly dismantled as a whole and transferred to other standard floors of other buildings or the next floor for use according to the construction schedule.
[0040] Furthermore, in step 4, concrete is poured. During the pouring process, the vibrating rod is avoided from vibrating the formwork. The concrete is poured from bottom to top, and the step surface is well finished.
[0041] Further, in step 5, the standardized stair tread steel formwork is removed and removed only after the strength meets the requirements. During the removal process of the standardized stair tread steel formwork, it is prohibited to hit it hard to avoid damaging the poured stair tread concrete. After the standardized stair tread steel formwork is removed, the finished product is protected in time, the concrete on the surface of the formwork is cleaned, and the standardized stair tread steel formwork is circulated to the next floor or other standard floors of other buildings for use, and the above steps are repeated.
[0042] It should be noted that the above specific implementations are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art should understand that various modifications, equivalent substitutions, changes, etc. can be made to the present invention. However, as long as these changes do not deviate from the spirit of the present invention, they should be within the scope of protection of the present invention. In addition, some terms used in the specification and claims of this application are not restrictive, but are only for the convenience of description.
Claims
1. A standardized revolving stair tread steel formwork, characterized in that: The invention comprises a keel (1), a step ladder steel formwork (2) and an adjustable support (3), wherein the step ladder steel formwork (2) is fixed in a high-low order under two mutually parallel keels (1), the upper end and the lower end of the keel (1) are respectively provided with through holes, the adjustable support (3) is arranged on the keel through the through holes, and the lower end of the adjustable support passes through the through holes to contact the upper floor level (4) and the lower floor level (5), and the adjustable support (3) is used to adjust the support height and horizontal positioning of the standardized stair step steel formwork.
2. The standardized revolving stair tread steel formwork according to claim 1 is characterized in that: The step ladder steel formwork (2) comprises a stair step back template (6), a vertical support (7), an upper back rib (8) and a lower back rib (9), wherein the upper back rib (8) is welded and fixed to the upper edge of the stair step back template (6), and the lower back rib (9) is welded and fixed to the lower edge of the stair step back template (6). The upper back rib (8) is provided with a notch, and the vertical support (7) is inserted into the notch. The vertical support (7) and the upper back rib (8) are welded and connected, and the upper part of the vertical support (7) is welded and fixed to the keel (1).
3. The standardized revolving stair tread steel formwork according to claim 2 is characterized in that: The step ladder steel mold (2) further comprises a horizontal reinforcement rod (10), one end of which is welded and fixed to the lower back rib, and the other end of which is welded and fixed to the keel (1).
4. The standardized revolving stair tread steel formwork according to claim 3 is characterized in that: The keel (1) comprises a support rod (11), an upper horizontal end (12) and a lower horizontal end (13); the keel (1) is integrally formed; the upper and lower ends of the support rod (11) are respectively fixedly connected to the upper horizontal end (12) and the lower horizontal end (13); the upper horizontal end (12) and the lower horizontal end (13) are respectively provided with through holes; the two adjustable supports (3) respectively pass through the through holes; the lower ends of the two adjustable supports (3) respectively contact the upper floor level (4) and the lower floor level (5).
5. The standardized revolving stair tread steel formwork according to claim 4 is characterized in that: The adjustable support (3) comprises an upper nut, a lower nut and a screw rod, the screw rod passes through the through hole, and the upper nut and the lower nut pass through the screw rod and are tightened at upper and lower positions of the through hole respectively.
6. The standardized revolving stair tread steel formwork according to claim 5 is characterized in that: It also includes four lifting rings, which are fixed at four symmetrical positions on the two keels (1).