Shaped disassembly-free steel formwork, manufacturing method thereof and three-fold-line wavy shaped disassembly-free steel formwork structure

Abstract

The invention discloses a finalized disassembly-free steel formwork, a manufacturing method thereof and a three-fold-line wave-shaped finalized disassembly-free steel formwork structure which are used for a formwork system for hanging a reinforced concrete boundary beam at the tail end of a cantilever floor slab, and the cross section of the finalized disassembly-free steel formwork is in a groove shape composed of an outer side face, a bottom face, an inner side face and an upper edge plate. The outer side surface is parallel to and higher than the inner side surface, and the upper edge plate is vertically turned outwards on the inner side surface; the edges where the inner side faces and the corresponding bottom faces are located are four-fold lines, the edges where the outer side faces and the corresponding bottom faces are located are three-fold lines, and the shaped disassembly-free steel formwork is provided with a first port and a second port in the length direction. Welding is reduced, the problems of slurry leakage and mold expansion are avoided, and the beneficial effects of being high in structural strength and reliable in quality are achieved.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a standardized, non-removable steel formwork, its manufacturing method, and a three-fold wavy, standardized, non-removable steel formwork structure. Background Technology

[0002] Currently, steel structure buildings are being used more and more widely, with increasingly diverse architectural styles, especially in commercial and public buildings. Curtain walls are used to achieve architectural shapes, and the corresponding internal structures also need to be adjusted to be either zigzags or curves according to the exterior facade. Since the thickness of cantilevered floor slabs is relatively thin, it is impossible to fix the curtain wall embedded parts. Therefore, reinforced concrete edge beams are often set at the ends of cantilevered floor slabs to fix the curtain wall keel. In order not to affect the building surface, the edge beams are hung down, that is, the upper surface of the reinforced concrete edge beam is flush with the cantilevered floor slab, and the lower surface protrudes from the lower surface of the cantilevered floor slab. In other words, the thickness of the reinforced concrete edge beam is greater than that of the cantilevered floor slab, so it is impossible to use steel truss floor decks to construct the hanging reinforced concrete edge beams. Due to the construction characteristics of steel structure buildings, external protective scaffolding is no longer erected around the building's perimeter. Since the cantilevered floor slabs extend horizontally beyond the building's perimeter, it is difficult to rebuild external protective scaffolding for edge protection. Then, a scaffolding support system is erected to splice the edge beam formwork to construct the reinforced concrete edge beams hanging at the ends of the cantilevered floor slabs. This significantly increases construction costs, extends the construction period, and reduces construction efficiency. Furthermore, because the scaffolding support system needs to be supported by the lower reinforced concrete edge beams, the upper reinforced concrete formwork support system can only be erected after the lower reinforced concrete edge beams have reached their curing strength, resulting in a long waiting period and extending the construction cycle. Additionally, using wooden formwork to splice the edge beam formwork on the scaffolding support system presents challenges such as high construction difficulty, poor splicing quality leading to grout leakage, and the need for tie bolts between the formwork sections, which can cause formwork bulging due to low structural strength. In particular, when the reinforced concrete edge beam hanging at the end of the cantilever slab has a three-fold wavy shape, how to reduce costs and improve efficiency in the construction of the formwork system for the three-fold wavy reinforced concrete edge beam, as well as improve the quality and structural strength of the formwork system, has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0003] The purpose of this invention is to provide a standardized, non-removable steel formwork and its manufacturing method, as well as a three-fold wave-shaped standardized, non-removable steel formwork structure, to solve the problems of poor splicing quality, grout leakage, and low strength of spliced ​​formwork connection structure leading to formwork bulging affecting construction quality when constructing a three-fold wave-shaped reinforced concrete edge beam hanging at the end of a cantilever floor slab.

[0004] To address the aforementioned technical problems, this invention provides a standardized, non-removable steel formwork system for hanging reinforced concrete edge beams at the ends of cantilevered floor slabs. The cross-sectional shape of the standardized, non-removable steel formwork is a channel-shaped body composed of an outer side, a bottom surface, an inner side, and a top edge plate. The outer side is parallel and higher than the inner side, and the top edge plate is vertically turned outwards onto the inner side. The inner side and its corresponding bottom surface form a four-fold line, and the outer side and its corresponding bottom surface form a three-fold line. The standardized, non-removable steel formwork has a first port and a second port in the length direction.

[0005] To address the aforementioned technical problems, this invention provides a method for manufacturing standardized, non-removable steel formwork, which involves cutting, folding, and welding flat steel plates, and includes:

[0006] Draw three broken lines along the length of the front or back of the flat steel plate according to the beam height, beam width, hanging height and lap width of the reinforced concrete edge beam, and denoted as the first broken line, the second broken line and the third broken line. The first long side and the first broken line form the outer side corresponding to the beam height, the first broken line and the second broken line form the bottom side corresponding to the beam width, the second broken line and the third broken line form the inner side corresponding to the hanging height, and the third broken line and the second long side form the upper edge plate corresponding to the lap width.

[0007] A first cut is made along the first port of the flat steel plate from the first length side to the second length side. The first cut includes a rectangle with a gradually decreasing area and central symmetry located in the beam height region, a trapezoid located in the beam width region, a rectangle located in the hanging height region, and a triangle located in the overlap width region.

[0008] A second cut is made at the first port of the flat steel plate, extending from the second length side towards the first length side and ending at the first broken line. The second cut includes a trapezoid with a gradually decreasing area and central symmetry located in the overlap width region, a rectangle located in the hanging height region, and a triangle located in the beam width region. A fourth broken line perpendicular to the length direction is drawn on the center line of the second cut extending to the beam height region.

[0009] A third cut is made from the second port of the flat steel plate from the first length side toward the second length side. The third cut includes a rectangle located in the beam height region, a trapezoid located in the beam width region, a rectangle located in the hanging height region, and a triangle located in the overlap width region, which are gradually reduced in area and centrally symmetrical.

[0010] The outer side is folded perpendicularly to the bottom along the first fold line, the inner side is folded perpendicularly to the bottom along the second fold line, the upper edge plate is folded outward perpendicularly to the inner side along the third fold line, and the outer side is folded along the fourth fold line. The disconnected parts of the first, second, and third cuts are then joined together and welded to form a groove-shaped body with an upper edge plate. The inner side of the groove-shaped body and its corresponding bottom edge are four fold lines, and the outer side of the groove-shaped body and its corresponding bottom edge are three fold lines.

[0011] To solve the above-mentioned technical problems, the present invention also provides a three-fold wave-shaped standardized non-removable steel formwork structure for a formwork system for hanging reinforced concrete edge beams at the end of cantilever slabs. The standardized non-removable steel formwork for hanging reinforced concrete edge beams at the end of cantilever slabs is composed of several standardized non-removable steel formworks spliced ​​together. The first end of one of two adjacent standardized non-removable steel formworks overlaps with the second end of another standardized non-removable steel formwork to form a three-fold wave-shaped standardized steel formwork.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] The standardized, non-removable steel formwork and its manufacturing method, as well as the three-fold wavy standardized, non-removable steel formwork structure provided by this invention, uses flat steel plates to form a standardized, non-removable steel formwork unit through cutting, folding, and welding. This reduces the amount of plate welding in the folded areas of each fold line, thereby improving the structural strength and connection strength of each standardized, non-removable steel formwork unit. Furthermore, the splicing and welding at the cut joints further enhances its structural strength and connection strength, avoiding the problem of insufficient connection strength when using multiple steel or wooden formworks for on-site splicing, which requires tying and fixing. This also avoids the problem of formwork bulging during concrete pouring.

[0014] The present invention provides a standardized, non-removable steel formwork, its manufacturing method, and a three-fold wave-shaped standardized, non-removable steel formwork structure. By splicing several standardized, non-removable steel formworks, the first end of one of two adjacent standardized, non-removable steel formworks overlaps with the second end of another, forming a three-fold wave-shaped standardized steel formwork with a channel-like cross-section and an upper edge plate. This three-fold wave-shaped standardized steel formwork, with its channel-like cross-section and upper edge plate, is then connected to the outermost steel beam of a steel structure building. This allows for the construction of a three-fold wave-shaped reinforced concrete edge beam hanging at the end of the cantilevered floor slab. This avoids the problems of high construction costs, poor splicing quality, grout leakage, and low structural strength leading to formwork bulging that occur when using formwork support systems and splicing formwork processes to construct reinforced concrete edge beams at the end of the lower cantilevered floor slabs in steel structure buildings. The three-fold wave-shaped standardized steel formwork offers advantages such as high structural strength and reliable quality, thus improving the construction quality of the reinforced concrete edge beams. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the planar structure of the standardized, non-removable steel formwork before folding, showing the fold lines and cuts made by sewing together flat steel plates.

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of a standardized, non-removable steel formwork formed by folding, cutting, butt welding, and then welding.

[0017] Figure 3 It is a three-dimensional structural diagram of a standardized, non-removable steel formwork structure with a three-fold wavy shape;

[0018] As shown in the figure:

[0019] 5. Standardized, non-removable steel formwork; 51. Outer side; 52. Bottom side; 53. Inner side; 54. Top edge plate.

[0020] 9. Flat steel plate; 91. First fold line; 92. Second fold line; 93. Third fold line; 94. Fourth fold line; 95. First cut; 96. Second cut; 97. Third cut. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0022] Please refer to Figures 1 to 3This invention provides a three-fold wave-shaped standardized non-removable steel formwork structure for a formwork system for hanging reinforced concrete side beams at the end of cantilever slabs. It is composed of several standardized non-removable steel formworks 5 spliced ​​together. The first end of one of two adjacent standardized non-removable steel formworks 5 overlaps with the second end of another standardized non-removable steel formwork 5 to form a three-fold wave-shaped standardized steel formwork. Each standardized, non-removable steel formwork 5 constitutes a unit component. The cross-sectional shape of each standardized, non-removable steel formwork 5 is a channel-shaped body composed of an outer side 51, a bottom surface 52, an inner side 53, and an upper edge plate 54. The outer side 51 is parallel to and higher than the inner side 53. The upper edge plate 54 is vertically turned outwards onto the inner side 53, forming a channel-shaped body with the upper edge plate 54. The inner side 53 and its corresponding bottom surface 52 form a four-fold line, while the outer side 51 and its corresponding bottom surface 52 form a three-fold line. The standardized, non-removable steel formwork 5 has a first port and a second port in the length direction. The port with an additional fold line and plate in the length direction is the second port. The upper edge plate 54 is used to connect to the outermost steel beam of the steel structure building via an indirect connection, allowing the standardized, non-removable steel formwork 5 to be suspended from the end of the cantilevered floor slab. The channel-shaped body is used to tie the edge beam reinforcement and pour concrete to form a reinforced concrete edge beam.

[0023] Please refer to Figures 1 to 2 To improve the structural strength of each standardized, non-removable steel formwork 5 and reduce welding operations, this embodiment of the invention also provides a method for manufacturing the standardized, non-removable steel formwork 5, which involves cutting, folding, and welding a flat steel plate 9, including:

[0024] Step S1: On the front or back of the flat steel plate 9, draw three broken lines along the length direction according to the beam height, beam width, hanging height and lap width of the reinforced concrete edge beam, and denoted as the first broken line 91, the second broken line 92 and the third broken line 93. The first long side and the first broken line 91 form the outer surface 51 corresponding to the beam height, the first broken line 91 and the second broken line 92 form the bottom surface 52 corresponding to the beam width, the second broken line 92 and the third broken line 93 form the inner surface 53 corresponding to the hanging height, and the third broken line 93 and the second long side form the upper edge plate 54 corresponding to the lap width.

[0025] Step S2: Cut a first cut 95 along the first port of the planar steel plate 9 from the first length side to the second length side. The first cut 95 includes a rectangle with a gradually decreasing area and central symmetry located in the beam height region, a trapezoid located in the beam width region, a rectangle located in the hanging height region, and a triangle located in the overlap width region.

[0026] Step S3: A second cut 96 is cut from the first port of the planar steel plate 9, extending from the second length side to the first length side and ending at the first broken line 91. The second cut 96 includes a trapezoid with a gradually decreasing area and central symmetry located in the overlap width region, a rectangle located in the hanging height region, and a triangle located in the beam width region. A fourth broken line 94 perpendicular to the length direction is drawn on the center line of the second cut 96 extending to the beam height region. Figure 1 The left side represents the direction of the first port, the right side represents the direction of the second port, the top side represents the first length side, and the bottom side represents the second length side.

[0027] In step S4, a third cut 97 is cut from the second port near the planar steel plate 9 from the first length side towards the second length side. The third cut 97 includes a rectangle located in the beam height region, a trapezoid located in the beam width region, a rectangle located in the hanging height region, and a triangle located in the overlap width region, all with gradually decreasing areas and central symmetry. The cutting order of the first cut 95, the second cut 96, and the third cut 97 can be arbitrarily arranged. Figure 1 The shaded area of ​​each incision represents the area removed during cutting.

[0028] Step S5: Fold the outer side 51 perpendicularly to the bottom surface 52 along the first fold line 91; fold the inner side 53 perpendicularly to the bottom surface 52 along the second fold line 92; fold the upper edge plate 54 perpendicularly outward relative to the inner side 53 along the third fold line 93; fold the outer side 51 along the fourth fold line 94; and weld the disconnected parts of the first cut 95, the second cut 96, and the third cut 97 together to form a groove-shaped body with an upper edge plate 54. The inner side 53 of the groove-shaped body and the corresponding bottom surface 52 are four-fold lines, and the outer side 51 of the groove-shaped body and the corresponding bottom surface 52 are three-fold lines.

[0029] The standardized, non-removable steel formwork 5 and its manufacturing method, as well as the three-fold wavy standardized, non-removable steel formwork structure provided in this invention, use flat steel plates 9 to form a standardized, non-removable steel formwork 5 unit through cutting, folding, and welding. This reduces the amount of plate welding in the folded areas of each fold line, thereby improving the structural strength and connection strength of each standardized, non-removable steel formwork 5 unit. Furthermore, after splicing and welding the cut joints, the structural strength and connection strength are further improved. This avoids the problem of insufficient connection strength when using multiple steel or wooden formworks for on-site splicing, which requires tying and fixing. It also avoids the problem of formwork bulging during concrete pouring.

[0030] The standardized, non-removable steel formwork 5 and its manufacturing method, along with the three-fold wave-shaped standardized, non-removable steel formwork structure provided in this invention, are constructed by splicing several standardized, non-removable steel formwork 5s together. The first end of one of two adjacent standardized, non-removable steel formwork 5s overlaps with the second end of another standardized, non-removable steel formwork 5, forming a three-fold wave-shaped standardized steel formwork with a channel-shaped cross-section having an upper edge plate 54. This three-fold wave-shaped standardized steel formwork, with its channel-shaped cross-section having an upper edge plate 54, is then connected to the outermost steel beam of the steel structure building. This allows for the construction of a three-fold wave-shaped reinforced concrete edge beam hanging at the end of the cantilevered floor slab. This avoids the problems of high construction costs, poor splicing quality, grout leakage, and low structural strength leading to formwork bulging that occur when using formwork support systems and splicing formwork processes to construct reinforced concrete edge beams at the lower cantilevered floor slabs of steel structure buildings. It offers advantages such as high structural strength and reliable quality, thus improving the construction quality of the reinforced concrete edge beams.

[0031] This invention is not limited to the specific embodiments described above. Obviously, the embodiments described above are only a part of the embodiments of this invention, not all of them. All other embodiments obtained by those skilled in the art based on the described embodiments of this invention are within the scope of protection of this invention. Those skilled in the art can make other modifications and variations to this invention. Therefore, if these modifications and variations of this invention fall within the scope of the claims of this invention, then this invention also intends to include these modifications and variations.

Claims

1. A standardized, non-removable steel formwork, characterized in that, The formwork system for hanging reinforced concrete edge beams at the ends of cantilever slabs has a standardized, non-removable steel formwork with a cross-sectional shape consisting of an outer side, a bottom surface, an inner side, and a top edge plate. The outer side is parallel to and higher than the inner side, and the top edge plate is vertically turned outward on the inner side. The inner side and its corresponding bottom surface form a four-fold line, and the outer side and its corresponding bottom surface form a three-fold line. The standardized, non-removable steel formwork has a first port and a second port in the length direction.

2. A method for manufacturing a standardized, non-dismantling steel formwork according to claim 1, characterized in that, It is manufactured using flat steel plates that are cut, folded, and welded, including: Draw three broken lines along the length of the front or back of the flat steel plate according to the beam height, beam width, hanging height and lap width of the reinforced concrete edge beam, and denoted as the first broken line, the second broken line and the third broken line. The first long side and the first broken line form the outer side corresponding to the beam height, the first broken line and the second broken line form the bottom side corresponding to the beam width, the second broken line and the third broken line form the inner side corresponding to the hanging height, and the third broken line and the second long side form the upper edge plate corresponding to the lap width. A first cut is made along the first port of the flat steel plate from the first length side to the second length side. The first cut includes a rectangle with a gradually decreasing area and central symmetry located in the beam height region, a trapezoid located in the beam width region, a rectangle located in the hanging height region, and a triangle located in the overlap width region. A second cut is made at the first port of the flat steel plate, extending from the second length side towards the first length side and ending at the first broken line. The second cut includes a trapezoid with a gradually decreasing area and central symmetry located in the overlap width region, a rectangle located in the hanging height region, and a triangle located in the beam width region. A fourth broken line perpendicular to the length direction is drawn on the center line of the second cut extending to the beam height region. A third cut is made from the second port of the flat steel plate from the first length side toward the second length side. The third cut includes a rectangle located in the beam height region, a trapezoid located in the beam width region, a rectangle located in the hanging height region, and a triangle located in the overlap width region, which are gradually reduced in area and centrally symmetrical. The outer side is folded perpendicularly to the bottom along the first fold line, the inner side is folded perpendicularly to the bottom along the second fold line, the upper edge plate is folded outward perpendicularly to the inner side along the third fold line, and the outer side is folded along the fourth fold line. The disconnected parts of the first, second, and third cuts are then joined together and welded to form a groove-shaped body with an upper edge plate. The inner side of the groove-shaped body and its corresponding bottom edge are four fold lines, and the outer side of the groove-shaped body and its corresponding bottom edge are three fold lines.

3. A three-fold wavy, standardized, non-removable steel formwork structure, characterized in that... The formwork system for hanging reinforced concrete edge beams at the end of cantilever slabs adopts the standardized, non-removable steel formwork for hanging reinforced concrete edge beams at the end of cantilever slabs as described in claim 1. It is composed of several standardized, non-removable steel formworks spliced ​​together. The first end of one of two adjacent standardized, non-removable steel formworks overlaps with the second end of another standardized, non-removable steel formwork to form a three-fold wavy standardized steel formwork.

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