A structure cornice construction inner-outer integrated comprehensive formwork system

Abstract

The utility model discloses a structure eaves construction inside and outside integrated comprehensive model frame system, including integrated floor model frame and combination model frame, floor model frame is supported at the bottom of floor structure formwork system, and the combination model frame is supported at the bottom of eaves formwork system and extends, including combination frame horizontal pole and combination frame vertical pole, and combination frame vertical pole includes inner row vertical pole, multifunctional middle vertical pole and outer row vertical pole, and inner row vertical pole, multifunctional middle vertical pole and combination frame horizontal pole constitute eaves inner model frame, and multifunctional middle vertical pole, outer row vertical pole and combination frame horizontal pole constitute eaves outer model frame, and outer row vertical pole extends at least one step distance upwards, and the most top layer combination frame horizontal pole of eaves outer model frame is separately arranged and is paved with the person operating board and forms the operation layer. The utility model carries out the combination design to the outer frame and the inner frame at the eaves, makes the inner and outer frame link smoothly integral stress, and has the operation installation function of model frame support and outer frame, guarantees the overall stability of eaves model frame.

Description

Technical Field

[0001] This utility model relates to the field of concrete construction formwork, and in particular to an integrated internal and external formwork system for structural eaves construction. Background Technology

[0002] Building eaves are important components connecting the roof and the exterior wall. They are typical cantilever structures and have the functions of rain protection, drainage, and aesthetic decoration. Therefore, the formwork support system below the eaves is the core key to ensuring construction quality and safety.

[0003] Traditionally, the formwork support for eaves uses separate inner and outer scaffolds. The inner scaffold is the concrete formwork for the roof and eaves, bearing the construction load and structural weight, while the outer scaffold serves as the working platform for exterior wall construction, providing an operating platform and safety protection. The inner and outer scaffolds are independently stressed, avoiding adverse effects on the eaves slab. However, the following technical problems still exist in the actual application of this technology in the construction of ultra-high-rise buildings with ultra-long eaves: First, the building is quite tall. Because the internal scaffolding verticals at the eaves need to be directly supported from the ground at the eaves, the verticals are quite tall. This makes the load-bearing capacity, rigidity, and stability of the internal scaffolding deteriorate at this point. The load concentration of the cantilever structure creates an overturning moment, which may cause the internal scaffolding to be unable to resist the moment. This could cause the eaves concrete to sink and bend during the pouring process, forming permanent structural defects and ultimately affecting the overall stability of the concrete structure.

[0004] Second, the long cantilever length of the eaves results in a longer extension of the steel pipes connecting the external scaffold to the wall, and a greater distance between the external scaffold and the wall. This reduces the overall overturning resistance of the external scaffold, making it more prone to collapse and causing casualties, damage to equipment and facilities, etc.

[0005] Third, the inner and outer scaffolding are set up separately. Due to the different functions of the scaffolding, the span of the outer and inner scaffolding is different in the initial scaffolding design. As a result, the scaffolding pipes at the eaves are intertwined and messy, making it inconvenient for operators to walk below. Utility Model Content

[0006] The purpose of this utility model is to provide an integrated formwork system for the construction of eaves, which solves the technical problem that the existing separate inner and outer scaffolding of ultra-high buildings with ultra-long eaves has the problem that the inner scaffolding cannot resist the overturning moment, resulting in permanent defects in the concrete structure; it also solves the technical problem that the external scaffolding's overturning resistance is reduced, leading to the collapse of the scaffolding and affecting construction safety; and it also solves the technical problem that the steel bars at the eaves are interwoven and messy, making it inconvenient for operators to walk underneath.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A comprehensive formwork system for constructing structural eaves, comprising an integrally connected floor formwork and a combined formwork. The floor formwork, supported at the bottom of the floor structure formwork system, includes connecting floor horizontal bars and floor vertical bars. The floor horizontal bars include connecting floor longitudinal bars and floor transverse bars. The floor vertical bars are supported on the floor in sections according to each floor level. The combined formwork is supported at the bottom of the eaves formwork system and extends outwards. It includes combined frame horizontal bars and combined frame vertical bars. The combined frame horizontal bars have the same step distance as the floor horizontal bars. It includes connected combined frame longitudinal bars and combined frame horizontal bars. The combined frame longitudinal bars are also used as the floor longitudinal bars that extend outwards. The combined frame vertical bars are set from the ground upwards and include inner row vertical bars, multi-functional middle vertical bars and outer row vertical bars. The inner row vertical bars, multi-functional middle vertical bars and combined frame horizontal bars form the inner eaves formwork. The multi-functional middle vertical bars, outer row vertical bars and combined frame horizontal bars form the outer eaves formwork. The outer row vertical bars extend upwards by at least one step. The top layer of the outer eaves formwork is set separately and covered with an operating board to form an operating layer.

[0008] The spans of the floor-mounted uprights and the combined frame uprights are the same.

[0009] The eaves formwork system includes the eaves bottom formwork, eaves secondary keel and eaves main keel connected in sequence. The top of the inner frame uprights is directly pressed against the bottom surface of the eaves bottom formwork. The eaves secondary keel is a wooden keel, and the eaves main keel is also made by the top layer of the combined frame horizontal bar.

[0010] The floor structure formwork system includes a bottom structural formwork, secondary structural joists, and main structural joists connected in sequence. The top of the floor uprights is equipped with a top support to accommodate the main structural joists. Both the secondary and main structural joists are made of timber.

[0011] The modular formwork is connected at the floor level by horizontally spaced, shared wall ties. The wall ties include vertical and horizontal wall ties. The bottom of the vertical wall ties is embedded in the end of the floor, the top of the vertical wall ties is connected to the inner end of the horizontal wall ties, and the body of the horizontal wall ties is connected to the uprights of the modular formwork.

[0012] The combined formwork is connected at the structural column locations by common column-clamping wall ties. The column-clamping ties include horizontal column-clamping bars that are tightly clamped around the structural column. The horizontal column-clamping bars include longitudinal column-clamping bars and transverse column-clamping bars. The longitudinal column-clamping bars are perpendicular to the combined formwork and their bodies are connected to the uprights of the combined formwork.

[0013] It also includes horizontal scissor bracing, which spans the floor formwork and the combined formwork and is set at intervals in layers. The top layer of horizontal scissor bracing is set separately at the top of the floor formwork and the combined formwork.

[0014] A safety net is installed below the operating layer, and a safety net is installed on the outer side of the outer row of uprights from bottom to top. A safety net is also installed below each horizontal scissor brace.

[0015] It also includes vertical scissor bracing, which is installed along the exterior of the integrated formwork system that integrates the interior and exterior eaves. It is also installed at intervals from bottom to top inside the structure. The vertical scissor bracing is installed separately within the floor formwork and combined formwork.

[0016] Compared with the prior art, this utility model has the following features and beneficial effects: This utility model combines the outer and inner frames at the eaves, dividing the formwork system into a floor formwork and a combined formwork. Firstly, the combined formwork includes two functional frames: the inner eaves formwork and the outer eaves formwork, with both frames sharing a row of uprights. Secondly, the horizontal bars extend outwards from the floor formwork, connecting the floor formwork and the combined formwork at the structural floor level. An operating platform is laid on the outer eaves formwork to create an operating layer. Furthermore, the combined formwork and structure are further reinforced by the wall ties within the slab and the column ties, ensuring smooth connection between the inner and outer scaffolds and overall structural load-bearing. This combined formwork serves as both formwork support and external scaffold operation and installation, guaranteeing the overall stability of the formwork at the eaves and ensuring the quality of the eaves concrete forming. Simultaneously, it ensures the convenience and safety of external scaffold operation, enabling rapid erection and dismantling and convenient management. This solution addresses the technical problem of insufficient overall stability and reduced overturning resistance in the separate installation of inner and outer scaffolds for the eaves of ultra-high buildings, which leads to poor concrete structure forming quality. It also resolves the technical issue of weakened overturning resistance in the external scaffold, causing instability and collapse, thus affecting construction safety.

[0017] To reduce the slippage between the existing top support and the wooden keel, this utility model removes the top support from the top of the uprights of the inner formwork frame of the eaves. The top of the uprights is directly supported on the bottom surface of the formwork panel. The horizontal bar also serves as the main keel of the formwork and is directly connected to the uprights to share the load. This increases the friction between the uprights and the formwork, strengthens the stability of the upright ends, and prevents the overturning of workers when operating above due to the excessive length of the cantilever, thus further ensuring construction safety.

[0018] This utility model also sets the span and spacing of the floor formwork and the combined formwork to be consistent, eliminating the phenomenon of redundant cross-sections of steel pipes in the inner and outer frames. Construction is fast and does not involve repeated erection and dismantling, solving the technical problem of messy and intertwined steel pipes at the eaves, which makes it inconvenient for operators to walk below. Attached Figure Description

[0019] The present invention will now be described in further detail with reference to the accompanying drawings.

[0020] Figure 1 This is a side view of the structure of this utility model.

[0021] Figure 2 yes Figure 1 Enlarged view of the eaves area.

[0022] Figure 3 yes Figure 1 A schematic diagram of the planar structure.

[0023] Figure 4 yes Figure 3 A magnified view of the top left corner.

[0024] Figure 5 This is a partial three-dimensional structural schematic diagram of the present invention.

[0025] Figure 6 yes Figure 5 Enlarged view of the central eaves.

[0026] Figure 7 yes Figure 5 Enlarged view of the internal wall ties in the middle plate.

[0027] Figure 8 yes Figure 5 Enlarged view of the bottom center.

[0028] Attached reference numerals: 1 - Floor formwork, 11 - Floor horizontal bar, 111 - Floor longitudinal bar, 112 - Floor horizontal bar, 12 - Floor vertical bar, 2 - Eaves inner formwork, 3 - Eaves outer formwork, 4 - Floor structural formwork system, 41 - Structural bottom formwork, 42 ​​- Structural secondary joists, 43 - Structural main joists, 5 - Eaves formwork system, 51 - Eaves bottom formwork, 52 - Eaves secondary joists, 6 - Floor, 7 - Combined formwork, 71 - Combined formwork horizontal bar, 711 - Horizontal bar of combined frame, 72 - Vertical bar of combined frame, 721 - Inner row of vertical bars, 722 - Multifunctional central vertical bar, 723 - Outer row of vertical bars, 73 - Horizontal bar of top layer combined frame, 8 - Access control panel, 9 - Wall tie inside the panel, 91 - Vertical wall tie, 92 - Horizontal wall tie, 10 - Column tie wall tie, 101 - Longitudinal column tie, 102 - Transverse column tie, 20 - Horizontal scissor brace, 30 - Safety net, 40 - Safety net, 50 - Vertical scissor brace. Detailed Implementation

[0029] See the examples. Figure 1-8 As shown, a structural eaves construction integrated formwork system includes an integrally connected floor formwork 1 and a combined formwork 7.

[0030] The floor formwork 1 is supported at the bottom of the floor structure formwork system 4 and includes connected floor horizontal bars 11 and floor vertical bars 12. The floor horizontal bars 11 include connected floor longitudinal bars 111 and floor transverse bars 112. The floor vertical bars 12 are supported on the floor 6 in sections according to the floor level.

[0031] The combined formwork is supported at the bottom and extends outwards from the eaves formwork system 5. It includes a combined frame horizontal bar 71 and a combined frame vertical bar 72. The combined frame horizontal bar 71 has the same step distance as the floor horizontal bar 11 and includes connecting combined frame longitudinal bars and combined frame horizontal bars 711. The combined frame longitudinal bars are also served by the outwardly extending floor longitudinal bars 111. The combined frame vertical bars 72 are set from the ground upwards, including inner row vertical bars 721, multi-functional middle vertical bars 722, and outer row vertical bars 723. The inner row vertical bars 721, multi-functional middle vertical bars 722, and combined frame horizontal bars 71 form the eaves inner formwork 2. The multi-functional middle vertical bars 722, outer row vertical bars 723, and combined frame horizontal bars 71 form the eaves outer formwork 3. The outer row vertical bars 723 extend upwards by at least one step. The topmost combined frame horizontal bar 73 of the eaves outer formwork 3 is set separately and covered with an access board 8 to form an operating layer. The floor vertical bars 12 and combined frame vertical bars 72 have the same span.

[0032] In this embodiment, the span is 900mm and the step distance is 1500mm. This integrated formwork system also includes ground-level bracing, and pads can be placed between each upright and the floor 6 or the ground. The floor formwork 1, the inner eaves formwork 2, and the outer eaves formwork 3 are all fastener-type steel pipe scaffolding support systems, with steel pipe specifications of 48.3mm diameter × 3.0mm wall thickness. The access board 8 is a wooden scaffold board with a thickness of not less than 50mm and a width of 200-250mm.

[0033] All the poles are connected to each other using fasteners. Fasteners are categorized into butt couplers, right-angle couplers, and swivel couplers. Butt couplers are used to extend the length of uprights, horizontal poles, horizontal scissor braces, and vertical scissor braces. Right-angle couplers are used to connect uprights and horizontal poles. Swivel couplers are used to connect horizontal scissor braces 3 and vertical scissor braces 4 to uprights 1.

[0034] Since the height-to-width ratio of the eaves formwork in this embodiment is greater than 3, there are two types of wall ties in this integrated formwork system that are connected to the building structure. Both are set in two steps and three spans to form a reliable connection with the surrounding structure. They are the wall tie 9 inside the slab and the wall tie 10 with the column.

[0035] The combined formwork 7 is connected to the floor by horizontally spaced, shared wall ties 9. The wall ties 9 include vertical wall ties 91 and horizontal wall ties 92. The bottom of the vertical wall ties 91 is embedded in the end of the floor 6, the top of the vertical wall ties 91 is connected to the inner end of the horizontal wall ties 92, and the body of the horizontal wall ties 92 is connected to the uprights of the combined formwork 72.

[0036] The combined formwork 7 is connected to the structural columns by a common column-hugging wall tie 10. The column-hugging tie includes a column-hugging horizontal bar that is tightly clamped around the structural column. The column-hugging horizontal bar includes a longitudinal column-hugging bar 101 and a transverse column-hugging bar 102. The longitudinal column-hugging bar 101 is perpendicular to the combined formwork 7 and its body is connected to the combined formwork upright 72.

[0037] This integrated formwork system is designed with two types of scissor bracing: horizontal scissor bracing 20 and vertical scissor bracing 50. Both horizontal and vertical scissor bracing 20 enhance the overall rigidity of the frame and increase lateral resistance. Horizontal scissor bracing 20 spans the floor formwork 1 and the combined formwork 7, and is installed at intervals in layers. The topmost horizontal scissor bracing 20 is installed separately at the top of both the floor formwork 1 and the combined formwork 7. In this embodiment, horizontal scissor bracing 20 is installed at the bottom, top, and middle of the combined formwork system at intervals of ≤6m. Vertical scissor bracing 50 is installed along the entire exterior facade of the integrated formwork system, extending from bottom to top, and is also installed at intervals within the interior. Vertical scissor bracing 50 is installed separately within the floor formwork 1 and the combined formwork 7. In this embodiment, vertical scissor bracing 50 is installed at 6m intervals laterally.

[0038] This integrated formwork system uses two types of safety nets: horizontal safety nets and vertical safety nets. A horizontal safety net 30 is installed below the operating level, and a vertical safety net 40 is installed from bottom to top on the outer side of the outer row of uprights 723. A horizontal safety net 30 is installed below each horizontal scissor brace 20. The vertical safety nets ensure the safety of operators working on the open surface.

[0039] The floor structure formwork system 4 of this integrated formwork system includes a structural bottom formwork 41, a structural secondary keel 42 and a structural main keel 43 connected in sequence. The top of the floor upright 12 is provided with a top support to accommodate the structural main keel 43. Both the structural secondary keel 42 and the structural main keel 43 are wooden keels.

[0040] The eaves formwork system 5 of this integrated formwork system includes an eaves bottom formwork 51, an eaves secondary keel 52 and an eaves main keel connected in sequence. The top of the inner frame upright 22 is directly pressed against the bottom surface of the eaves bottom formwork 51. The eaves secondary keel 52 is a wooden keel. The eaves main keel is also served by the top layer combined frame horizontal bar 73.

[0041] In this embodiment, the main timber joists are 85mm×85mm in size, and the secondary timber joists are 45mm×85mm in size; the top U-shaped support uses a matching 48mm steel pipe U-shaped support with φ38mm threaded rods and a length of 400mm~700mm; the structural bottom formwork 41 and the eaves bottom formwork 51 are both made of film-coated plywood with a thickness of 15mm.

[0042] The construction process in this embodiment is as follows: Step 1: Based on the construction dimensions of the super-tall building with extra-long eaves to be constructed, design the step distance and span of each upright and horizontal bar of the combined formwork system, and design the dimensions of the horizontal and vertical scissor braces. Step 2: During construction, the floor formwork 1, the inner eaves formwork 2, and the outer eaves formwork 3 are erected as a whole from bottom to top. Step 3: Connect the horizontal safety net and the vertical safety net; Step 4: Lay out the access control panel 8; Step 5: Pour the eaves concrete; Step six: After the concrete has hardened, dismantle the integrated formwork system for the internal and external eaves construction.

Claims

1. A comprehensive formwork system integrating internal and external structures for eaves construction, characterized in that: It includes an integrally connected floor formwork (1) and a combined formwork (7). The floor formwork (1) is supported at the bottom of the floor structure formwork system (4), and includes connected floor horizontal bars (11) and floor vertical bars (12). The floor horizontal bars (11) include connected floor longitudinal bars (111) and floor horizontal bars (112). The floor vertical bars (12) are supported on the floor (6) in sections according to the floor level. The combined formwork is supported at the bottom of the eaves formwork system (5) and extends outwards, including the combined frame horizontal bar (71) and the combined frame vertical bar (72). The combined frame horizontal bar (71) has the same step distance as the floor horizontal bar (11), including the combined frame longitudinal bar and the combined frame horizontal bar (711). The combined frame longitudinal bar is also served by the outwardly extending floor longitudinal bar (111). The combined frame vertical bar (72) is set from the ground upwards, including the inner row of vertical bars (721), the multi-functional middle vertical bar (722), and the outer row of vertical bars. The inner row of uprights (723), the inner row of uprights (721), the multi-functional middle uprights (722) and the combined frame horizontal bar (71) form the eaves inner formwork frame (2). The outer row of uprights (722), the outer row of uprights (723) and the combined frame horizontal bar (71) form the eaves outer formwork frame (3). The outer row of uprights (723) extends upward at least one step. The top layer of the eaves outer formwork frame (3) is set up separately and covered with an operating board (8) to form an operating layer.

2. The integrated formwork system for the construction of the structural eaves as described in claim 1, characterized in that: The spans of the floor uprights (12) and the combined frame uprights (72) are the same.

3. The integrated formwork system for the construction of the structural eaves as described in claim 1, characterized in that: The eaves formwork system (5) includes the eaves bottom formwork (51), the eaves secondary keel (52) and the eaves main keel connected in sequence. The top of the inner frame uprights (22) is directly pressed against the bottom surface of the eaves bottom formwork (51). The eaves secondary keel (52) is a wooden keel, and the eaves main keel is also made by the top layer of the combined frame horizontal bar (73).

4. The integrated formwork system for the construction of the structural eaves as described in claim 1, characterized in that: The floor structure formwork system (4) includes a structural bottom formwork (41), a structural secondary keel (42) and a structural main keel (43) connected in sequence. The top of the floor upright (12) is provided with a top support to accommodate the structural main keel (43). Both the structural secondary keel (42) and the structural main keel (43) are wooden keels.

5. The integrated formwork system for the construction of the structural eaves as described in claim 1, characterized in that: The combined formwork (7) is connected at the floor position by horizontally spaced, shared wall ties (9). The wall ties (9) include vertical wall ties (91) and horizontal wall ties (92). The bottom of the vertical wall ties (91) is embedded in the end of the floor (6). The top of the vertical wall ties (91) is connected to the inner end of the horizontal wall ties (92). The body of the horizontal wall ties (92) is connected to the uprights (72) of the combined formwork.

6. The integrated formwork system for the construction of the structural eaves as described in claim 1, characterized in that: The combined formwork (7) is connected at the structural column position by a common column-hugging wall tie (10). The column-hugging tie includes a column-hugging horizontal bar that is tightly clamped around the structural column. The column-hugging horizontal bar includes a longitudinal column-hugging bar (101) and a transverse column-hugging bar (102). The longitudinal column-hugging bar (101) is perpendicular to the combined formwork (7) and its body is connected to the combined frame upright (72).

7. The integrated formwork system for the construction of the structural eaves as described in claim 1, characterized in that: It also includes horizontal scissor bracing (20), which spans the floor formwork (1) and the combined formwork (7) and is set in layers at intervals. The top layer of horizontal scissor bracing (20) is set separately at the top of the floor formwork (1) and the combined formwork (7).

8. The integrated formwork system for the construction of the structural eaves as described in claim 7, characterized in that: A safety net (30) is installed below the operating layer, and a safety net (40) is installed from bottom to top on the outer side of the outer row of uprights (723). A safety net (30) is installed below each horizontal scissor brace (20).

9. The integrated formwork system for the construction of the structural eaves as described in claim 7, characterized in that: It also includes vertical scissor bracing (50), which is installed along the exterior of the integrated formwork system of the structure eaves and is also installed at intervals from bottom to top inside. The vertical scissor bracing (50) is installed separately within the floor formwork (1) and the combined formwork (7).

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