Formwork structure for curved fair-faced concrete roof of a building

Abstract

The utility model discloses a template structure for building curved fair-faced concrete roof, and the arc-shaped template bottom surface has a plurality of arc-shaped transition strip plates extending along the arc direction, each arc-shaped transition strip plate is fixed with the arc-shaped template through a plurality of steel screws or steel nails from bottom to top, and the top end of the steel screw or steel nail is located in the arc-shaped template top surface. The arc-shaped transition strip plate bottom surface has a plurality of square wood batten, each square wood batten is fixed with the arc-shaped transition strip plate through a plurality of steel screws or steel nails from top to bottom. The square wood batten bottom surface has a plurality of arc-shaped steel pipes. The arc-shaped steel pipe bottom surface has a plurality of horizontal straight steel pipes, which are 90 degrees with the arc-shaped steel pipe. The length of each horizontal straight steel pipe is adjusted by the top support of the top end of the plurality of vertical poles of the floor type scaffold. The support of the template structure has high adhesion between each other and the arc-shaped template, good support stress effect, and the support can bear the horizontal component force of the arc-shaped template and the formwork process is convenient and fast.

Description

Technical Field

[0001] This utility model relates to the field of fair-faced concrete pouring construction technology, specifically a template structure for curved fair-faced concrete roofs of buildings. Background Technology

[0002] Fair-faced concrete is widely used in modern architecture due to its smooth, dense, and aesthetically pleasing finish. Art galleries, museums, and other venues with aesthetically pleasing structures often use fair-faced concrete to cast curved surfaces such as arched or curved roofs.

[0003] Existing conventional flat roof formwork structures all include ground-supported scaffolding. The multiple uprights of the ground-supported scaffolding are connected and fixed by multiple longitudinally and transversely arranged horizontal bars. The top of each upright is a threaded top support that can be adjusted in height. Square timber is placed on the top support, and the formwork is placed on the square timber and fixed to the square timber by steel nails or steel screws passing through the formwork from top to bottom.

[0004] In existing technologies, corresponding template structures have been disclosed for casting curved panels, such as curved roofs. For example, an arc-shaped template is used, which is nailed to multiple square timber joists perpendicular to the width direction (i.e., the arc span direction). The width-direction square timber joists are then placed on arc-shaped steel pipes along the length direction (i.e., the arc span direction), and the arc-shaped steel pipes are supported by top supports. To compensate for the curvature of the arc-shaped steel pipes, wedge-shaped wooden blocks are placed between each top support and the arc-shaped steel pipe. The above-mentioned existing templates for casting curved roofs have the following drawbacks: 1. The arc-shaped template is directly nailed to the square timber joists, resulting in poor fit between the entire curved surface of the template and the plane of the square timber joists, lacking a transition and leading to unsatisfactory load-bearing support. 2. The steel nails or screws connecting the arc-shaped template and the square timber joists penetrate the template from top to bottom, leaving holes on the bottom surface of the roof after casting. This is unsightly and affects the finishing effect of the fair-faced concrete roof bottom surface, requiring post-treatment and increasing labor and material costs. 3. The transition between the top support and the curved steel pipe relies on wedge-shaped wooden blocks for support. However, the curvature of the curved template and the curved steel pipe is inconsistent at each point. Therefore, wedge-shaped wooden blocks with different curvatures are required at each point, which is difficult to implement and costly. Each wedge-shaped wooden block needs to be wedged in and fixed with screws, which is cumbersome. Furthermore, when the curved template is poured with concrete, there is a horizontal component force that will push the wedge-shaped wooden blocks horizontally, causing them to loosen. This results in the top support and wedge-shaped wooden blocks providing unstable and insecure support for the upper template. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a formwork structure for curved fair-faced concrete roofs of buildings, which has a high degree of fit between the support member and the arc template, good support force effect, the support member can withstand the horizontal component force of the arc template, the formwork process is convenient and quick, and the cast roof bottom surface finish is of good quality.

[0006] The technical solution of this utility model is to provide a template structure for curved fair-faced concrete roofs of buildings, including an arc-shaped template and a ground-mounted scaffold.

[0007] The bottom surface of the arc template is provided with multiple arc transition strips that have the same curvature as the arc template and extend along the curvature direction. Each arc transition strip is fixed to the arc template by multiple steel screws or nails from bottom to top, and the top of the steel screws or nails is located inside the top surface of the arc template.

[0008] The bottom surface of multiple arc-shaped transition strips is provided with multiple square timber ribs at 90° to each other. Each square timber rib is fixed to multiple arc-shaped transition strips by multiple steel screws or nails from top to bottom. The top of the steel screws or nails is located below the top surface of the arc-shaped transition strips or flush with the top surface of the arc-shaped transition strips.

[0009] The bottom surface of multiple square timber joists is provided with multiple arc-shaped steel pipes that are 90° to each other with the square timber joists. The arc of the arc-shaped steel pipes is the same as the arc of the arc template and extends along the arc direction. Each arc-shaped steel pipe is detachably connected to each square timber joist.

[0010] Multiple curved steel pipes are spaced apart on their bottom surfaces, with multiple horizontal straight steel pipes at 90° to each other. Each curved steel pipe is detachably connected to each horizontal straight steel pipe.

[0011] Each horizontal straight steel pipe is secured along its entire length by multiple uprights spaced apart on the ground-supported scaffolding, with adjustable height supports at the top.

[0012] With the above structure, the template structure of this utility model for curved fair-faced concrete roofs of buildings has the following advantages:

[0013] The curved template is connected to the square timber joists via curved transition strips, and the curvature of the curved transition strips is the same as that of the curved template, so they can fit perfectly with the curved template, which greatly improves the load-bearing capacity of the square timber joists.

[0014] Because the curved transition strips are nailed to each square timber from top to bottom, and the top surface is flush or recessed, it is easier for the curved transition strips to fit tightly against the bottom surface of the curved template. Each curved transition strip is nailed to the curved template from bottom to top using self-tapping screws, and the tip of the steel screws, like the nail tip, is located inside the top surface of the curved template. This ensures a tight fit for a firm connection, and also ensures that the curved top surface of the template is smooth and does not leave holes on the bottom surface of the fair-faced concrete roof. This effectively guarantees the finishing effect of the bottom surface of the fair-faced concrete roof, and saves labor and material costs by eliminating the need for post-treatment.

[0015] Because the curvature of the curved steel pipe is the same as that of the curved template, it is easier for the curved steel pipe to fit snugly against the square timber joists compared to a large area of ​​a single curved template. Another significant difference in this invention is the use of multiple horizontal straight steel pipes, each at a 90° angle to the curved steel pipes, instead of several wedge-shaped wooden blocks, positioned on the bottom surface of the multiple curved steel pipes. Each curved steel pipe can be detachably connected to each square timber joist on its top surface using wire binding, and each curved steel pipe can be detachably connected to each horizontal straight steel pipe on its bottom surface using fasteners. The adjustable-height top supports at the top of the multiple uprights of the ground-supported scaffold directly tighten and fix the horizontal straight steel pipes, overcoming the drawbacks of using several wedge-shaped wooden blocks in existing technologies. This design is easier to implement, has lower labor costs, and is simpler and more convenient to operate during formwork erection. The supporting components can effectively withstand the horizontal component force of the curved template, providing stable and secure support.

[0016] This utility model is used for the formwork structure of curved fair-faced concrete roofs of buildings. It effectively ensures the good finishing effect, smoothness, and other surface quality of the bottom surface of the poured fair-faced concrete roof. The curved formwork, curved transition strips, square timber, and curved steel pipes fit well together. The top support has a good tightening and fixing effect on the horizontal straight steel pipes and curved steel pipes. The entire formwork structure has good overall support, is firm, stable and reliable, and can resist the pouring pressure and horizontal component force. The uprights of the ground-supported scaffolding remain vertical from beginning to end, and there is no need to adjust the top support angle according to the curvature of the formwork.

[0017] Furthermore, the bottom of the curved template is provided with multiple grooves at intervals, forming 90° angles with the curved transition strips, for bending the curved template to the predetermined curvature. This structure allows the curved template to achieve the predetermined curvature while maintaining the required smoothness and gloss on the curved top surface, further ensuring that the poured fair-faced concrete roof surface meets the quality requirements of aesthetic appeal and a smooth finish.

[0018] Furthermore, all the aforementioned intervals are equally spaced. With this structure, the overall integrity, robustness, stability, and reliability of the template structure are improved.

[0019] Furthermore, the curved transition strip is a curved flat wooden strip. With the above structure, the curved transition strip has a better fit and tighter connection with the curved template, and a better fit and tighter connection with the square timber joists, making the transition function between the square timber joists and the template more excellent. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a preferred embodiment of the template structure of this utility model. Figure 1 ( Figure 1 and Figure 3 The longitudinal and transverse horizontal bars in ground-supported scaffolding are omitted in this text.

[0021] Figure 2 yes Figure 1 A magnified structural diagram of A in the diagram.

[0022] Figure 3 This is a schematic diagram of a preferred embodiment of the template structure of this utility model. Figure 2 .

[0023] Figure 4 yes Figure 3 A magnified structural diagram of B in the diagram.

[0024] As shown in the figure:

[0025] 1. Curved template; 11. Strip groove;

[0026] 2. Ground-supported scaffolding, 21. Upright, 22. Top support, 221. U-shaped block, 222. Sleeve;

[0027] 3. Curved transition strip;

[0028] 4. Square timber;

[0029] 5. Curved steel pipe;

[0030] 6. Horizontal straight steel pipe. Detailed Implementation

[0031] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions of specific embodiments are intended to aid in understanding this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various specific embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0032] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown.

[0033] Curved roofs can be understood as including arched roofs, doorway arched roofs, and wave-shaped roofs; and doorway arched roofs can be considered a type of arched roof. Similarly, curved formwork includes arched formwork 1, doorway arched formwork, and wave-shaped formwork; and doorway arched formwork can be considered a type of arched formwork 1.

[0034] The preferred embodiment of the template structure for curved fair-faced concrete roofs of buildings of this utility model includes an arc-shaped template 1 and a ground-mounted scaffold 2.

[0035] The formwork structure is also called the support structure. The curved formwork 1 can be made of wood or plastic. The ground-supported scaffold 2 consists of multiple uprights 21 (also called columns) and multiple crisscrossing horizontal bars (longitudinal and transverse horizontal bars) connected and fixed together, forming a matrix-type or full-span ground-supported scaffold 2. The longitudinal horizontal bars are also called longitudinal horizontal bars; the transverse horizontal bars 3 are also called transverse horizontal bars. The uprights 21 and the crisscrossing longitudinal and transverse horizontal bars can all be made of steel pipe. It is easy to understand that the heights of the uprights 21 supporting the curved formwork 1 vary. Each upright 21 has a threaded top support 22 at the top, allowing for height adjustment. Figures 1-4 As shown, a specific structure of the top support 22 is as follows: a central column is welded to the bottom end of the U-shaped block 221, and a sleeve 222 is concentrically and movably fitted (or rotatedly fitted) around the central column. The top end of the sleeve 222 is in contact with the bottom surface of the U-shaped block 221. The lower end of the sleeve 222 has an external thread, which screws into the internal thread at the top end of the steel pipe of the upright 21 and tightens the U-shaped block 221 to adjust its height, thereby tightening and fixing the horizontal straight steel pipe 6 below. A screw for transversely tightening the central column can be provided at the upper end of the sleeve 222 to prevent the sleeve 222 from loosening. An electric pipe wrench can be used to tighten the sleeve 222. It is easy to understand that the U-shaped block 221, the central column, and the sleeve 222 are all made of steel. Another top support structure, not shown in the figure, is as follows: A sleeve is welded to the bottom of an upward-opening U-shaped block. A screw with a force-applying part, such as a large-headed hexagonal screw, is movably fitted into the sleeve. The upper end of the screw can be a smooth rod, and the external thread at the lower end of the screw engages with the internal thread at the top of the vertical steel pipe. A horizontal locking screw can be provided on the sleeve to prevent the screw from loosening. The number of vertical rods 21 can be in the form of dozens, hundreds, or thousands, or simply "several". Similarly, the number of longitudinal horizontal bars can be in the form of dozens, hundreds, or thousands, or simply "several".

[0036] The bottom surface of the arc-shaped template 1 is provided with multiple arc-shaped transition strips 3, each with the same curvature as the template 1 and extending along the curvature direction. Each arc-shaped transition strip 3 is fixed to the arc-shaped template 1 by multiple steel screws or nails from bottom to top, with the tips of the screws or nails located inside the top surface of the arc-shaped template 1. The screws are often self-tapping screws, with the tips located inside the top surface of the arc-shaped template 1, meaning they do not penetrate the surface. The tip of the self-tapping screw may be 2-5mm away from the top arc surface. The arc-shaped transition strips 3 can be parallel to each other. The number of arc-shaped transition strips 3 can be several, a dozen, or dozens, or simply "several". Similarly, the number of steel screws or nails can also be several.

[0037] The arc direction can be considered as the length direction, and the direction perpendicular to the arc direction (i.e., the length direction) and forming a 90° angle with it can be considered as the width direction. The longitudinal crossbars mentioned above refer to crossbars extending along the length direction. The transverse crossbars mentioned above refer to crossbars extending along the width direction.

[0038] Multiple curved transition strips 3 have several square timber joists 4 spaced at equal intervals on their bottom surfaces, forming a 90° angle with each of the curved transition strips 3. Each square timber joist 4 is fixed to the curved transition strips 3 by multiple steel screws or nails arranged from top to bottom. The tips of the steel screws or nails are located below or flush with the top surface of the curved transition strips 3. The square timber joists 4 can be parallel to each other. The number of square timber joists 4 can be several, a dozen, or dozens, or simply "a number". The number of steel screws or nails can also be several, a dozen, or dozens, or simply "a number".

[0039] Multiple square timber joists 4 are spaced apart on their bottom surfaces, preferably at equal intervals, by multiple arc-shaped steel pipes 5 forming a 90° angle with each other. The arc of the arc-shaped steel pipes 5 is the same as the arc of the arc-shaped template 1 and extends along the arc direction. Each arc-shaped steel pipe 5 is detachably connected to each square timber joist 4, for example, each connection between the square timber joist 4 and the arc-shaped steel pipe 5 is secured with wire. The arc-shaped steel pipes 5 can be parallel to each other. The number of arc-shaped steel pipes 5 can be several, a dozen, or even dozens, and can also be referred to as "a number of pipes".

[0040] Multiple curved steel pipes 5 are spaced apart on their bottom surfaces, preferably at equal intervals, by multiple horizontal straight steel pipes 6 arranged at 90° angles to the curved steel pipes 5. Each curved steel pipe 5 is detachably connected to each horizontal straight steel pipe 6, for example, by using a snap-fit ​​connection formed by two interconnected clamps at each connection point between the curved steel pipe 5 and the horizontal straight steel pipe 6. The horizontal straight steel pipes 6 can be parallel to each other. The number of horizontal straight steel pipes 6 can be several, a dozen, or even dozens, and can also be referred to as "numerous".

[0041] Each horizontal straight steel pipe 6 is secured by a height-adjustable top support 22 at the top of multiple uprights 21, preferably at equal intervals, as described above, which are part of the ground-supported scaffold 2.

[0042] The bottom of the arc-shaped template 1 may be provided with multiple strip grooves 11 that are preferably equally spaced and form a 90° angle with the arc-shaped transition strip 3, which are used to bend the arc-shaped template 1 to a predetermined arc. The 90° angle with the arc-shaped transition strip 3 refers to the width direction of the arc-shaped template 1. It is easy to understand that the strip grooves 11 extend through the entire width of the arc-shaped template 1.

[0043] As described above, the interval settings are preferably set at equal distances.

[0044] The curved transition strip 3 is preferably a curved flat wooden strip.

[0045] Support is also called a bracing. Horizontal direction is also called transverse direction.

[0046] The formwork support process, also known as the assembly process, for the template structure of the curved fair-faced concrete roof of this utility model is briefly described as follows:

[0047] 1. Constructing a matrix-style, also known as a full-span, ground-supported scaffold: Multiple uprights 21, arranged along the arc or length direction, with the middle section higher than the ends and each subsequent upright decreasing in height, are detachably connected and fixed using multiple longitudinal and transverse horizontal bars. For example, each connection between the upright 21 and the horizontal bar uses two interconnected clamps forming a snap-fit ​​connection. It's easy to understand that the multiple uprights 21 extending along the width direction are of equal height.

[0048] 2. Place a horizontally straight steel pipe 6 on the bottom plate inside the slot of an adjustable top support 22, such as an upward-opening U-shaped block 221, at the top of multiple uprights 21 extending in the width direction; until all the horizontally straight steel pipes 6 are placed on the top supports 22 of all the uprights 21.

[0049] 3. Place an arc-shaped steel pipe 5 on the top surface of multiple horizontal straight steel pipes 6, and fasten and fix each connection between the arc-shaped steel pipe 5 and the multiple horizontal straight steel pipes 6 using a fastener consisting of two interconnected clamps; until all the arc-shaped steel pipes 5 and the multiple horizontal straight steel pipes 6 are fastened and fixed using the fastener.

[0050] 4. Place a square timber 4 on top of multiple curved steel pipes 5, and tie and fix each connection between the square timber 4 and the multiple curved steel pipes 5 with wire; until all the square timber 4 and the multiple curved steel pipes 5 are tied and fixed with wire.

[0051] 5. Place an arc-shaped transition strip 3 on the top surface of multiple square timber joists 4, and tighten each connection between the arc-shaped transition strip 3 and the multiple square timber joists 4 with one or more, preferably multiple, steel screws or nails from top to bottom. The top surface of the steel screws or nails is flush with or below the top surface of the arc-shaped transition strip 3, preferably below the top surface of the arc-shaped transition strip 3, until all the arc-shaped transition strips 3 and the multiple square timber joists 4 are tightened and fixed with steel screws or nails. It is easy to understand that an electric wrench or electric screwdriver can be used to tighten the screws, or a nail gun can be used to nail the steel nails.

[0052] 6. Place the arc-shaped template 1 on the top surface of the multiple arc-shaped transition strips 3. Secure one arc-shaped transition strip 3, already fixed to the multiple square timber joists 4, to the arc-shaped template 1 using multiple steel screws or nails from bottom to top. Preferably, self-tapping screws are used for this purpose. The tip of the steel screw or nail, such as the tip of a self-tapping screw, should be located within the arc-shaped top surface of the arc-shaped template 1. Continue this process until all the arc-shaped transition strips 3 already fixed to the multiple square timber joists 4 are secured to the arc-shaped template 1 using self-tapping screws. It is easy to understand that an electric wrench or electric screwdriver can be used to tighten the self-tapping screws.

[0053] 7. Finally, use an electric pipe wrench to tighten the external thread of the sleeve 222 of each top support 22 to the internal thread of the steel pipe at the top of the upright 21 so that the U-shaped block 221 of the top support 22 will press the horizontal straight steel pipe 6 tightly, thereby firmly supporting the entire template structure.

[0054] Support is also called a bracing. Horizontal direction is also called transverse direction.

[0055] Components not labeled above, such as longitudinal crossbars, transverse crossbars, the center post of the top support, steel nails or screws (e.g., self-tapping screws), wire, clips, external threads of sleeves, and internal threads at the top of the upright, are not shown in the diagram. The attached diagrams are for illustrative purposes only; in case of any discrepancies between the diagrams and the textual descriptions, or between the diagrams themselves, the textual descriptions shall prevail.

[0056] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A formwork structure for curved fair-faced concrete roofs of buildings, comprising curved formwork and ground-supported scaffolding; characterized in that: The bottom surface of the arc template is provided with multiple arc transition strips that have the same curvature as the arc template and extend along the curvature direction. Each arc transition strip is fixed to the arc template by multiple steel screws or nails from bottom to top, and the top of the steel screws or nails is located inside the top surface of the arc template. The bottom surface of multiple arc-shaped transition strips is provided with multiple square timber ribs at 90° to each other. Each square timber rib is fixed to multiple arc-shaped transition strips by multiple steel screws or nails from top to bottom. The top of the steel screws or nails is located below the top surface of the arc-shaped transition strips or flush with the top surface of the arc-shaped transition strips. The bottom surface of multiple square timber joists is provided with multiple arc-shaped steel pipes that are 90° to each other with the square timber joists. The arc of the arc-shaped steel pipes is the same as the arc of the arc template and extends along the arc direction. Each arc-shaped steel pipe is detachably connected to each square timber joist. Multiple curved steel pipes are spaced apart on their bottom surfaces, with multiple horizontal straight steel pipes at 90° to each other. Each curved steel pipe is detachably connected to each horizontal straight steel pipe. Each horizontal straight steel pipe is secured along its entire length by multiple uprights spaced apart on the ground-supported scaffolding, with adjustable height supports at the top.

2. The formwork structure for curved fair-faced concrete roofs of buildings according to claim 1, characterized in that: The bottom of the curved template is provided with multiple strip grooves that are at 90° to the curved transition strip and are used to bend the curved template to a predetermined curvature.

3. The formwork structure for curved fair-faced concrete roofs of buildings according to claim 2, characterized in that: All the interval settings mentioned are equal-distance intervals.

4. The formwork structure for curved fair-faced concrete roofs of buildings according to claim 1, characterized in that: The curved transition strip is a curved flat wooden strip.

Images