Construction method of special-shaped curved surface concrete roof panel

Abstract

The invention discloses a special-shaped curved surface concrete roof board construction method, which belongs to the technical field of building construction, and comprises the following steps: S1, designing a special-shaped curved surface concrete structure roof board formwork, deepening a formwork, establishing a curved surface formwork through rhinoceros UV grid fitting, and then designing a support system; and S2, construction of the special-shaped curved surface concrete structure roof panel formwork is conducted, specifically, formwork machining is conducted firstly, specifically, modeling wood secondary keel machining and panel machining are conducted, then on-site splicing construction is conducted, the machined formwork is installed, and concrete pouring is conducted after formwork installation is completed. The formwork and the supports are designed through the rhinoceros UV grids, a manufacturer manufactures the formwork according to a machining drawing, the manufactured formwork is installed on site, concrete pouring is conducted after installation, and the effect of facilitating construction is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a construction method of a special-shaped curved concrete roof panel. Background Art

[0002] With the booming development of the construction industry, construction technology has also been continuously improving. More and more buildings are constantly pursuing the beauty, artistry and uniqueness of architectural shapes, thus constantly designing novel buildings, but at the same time it also brings new challenges to construction. The construction of special-shaped beams and slabs is becoming more and more common, and the shape and curvature of each special-shaped beam and slab are different.

[0003] Regarding the above-mentioned related technologies, since some beams and slabs are close to vertical, the template production and molding of special-shaped beams and slabs are difficult; the span of the hyperbolic surface is large, the height difference is large, and the precise positioning of the formwork installation is difficult; the overall elevation control of the frame erection at the connection between the hyperbolic frame and the plane is difficult, and there is a defect of great construction difficulty. Summary of the invention

[0004] The purpose of the present invention is to provide a construction method for a special-shaped curved concrete roof panel, so as to solve the above-mentioned problems existing in the prior art and achieve the effect of facilitating construction.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A construction method of a special-shaped curved concrete roof panel of the present invention comprises the following steps:

[0007] S1. Design of formwork for roof panels of special-shaped curved concrete structures: In-depth design of formwork. Use Rhino UV grid fitting to establish curved formwork. According to the plane contour map provided by the design, use Rhino UV grid map, extract points from the grid, output a three-dimensional coordinate point cloud system, generate a three-dimensional positioning map of the structure space, superimpose the three-dimensional positioning map of the structure space with the curved roof modeling lofting map, determine the elevation and curvature of the intersection of the plate and beam, and loft the beam side formwork and beam bottom formwork according to the elevation, curvature and beam section. Generate the top plate formwork lofting map by connecting multiple points based on the curved roof modeling lofting map and the beam position map; then design the support system;

[0008] S2. Construction of formwork for roof panels of special-shaped curved concrete structures: first, the formwork is processed, which includes processing of shaped wooden keels and panels; then, on-site assembly is carried out to install the processed formwork, wherein the beam formwork adopts the beam side wrapping beam bottom method. During the construction process, the beam side is adjusted to the corresponding height according to the on-site conditions, an interface is reserved between the fixed formwork and the loose formwork, and the column head formwork is loosely assembled according to the actual on-site conditions, and the construction error is left at the column head position; finally, concrete pouring is carried out.

[0009] By adopting the above technical solution, the template and support are designed through the Rhino UV grid, the manufacturer makes the template according to the processing drawing, and the prepared template is installed on site. After installation, concrete can be poured. The template is prefabricated, and the template can be erected and concrete can be poured to achieve the effect of facilitating construction. At the same time, the three-dimensional positioning diagram of the structural space and the curved roof modeling sample diagram are generated and superimposed on each other to determine the elevation and curvature of the intersection of the plate and beam, and the top plate template lofting diagram is generated to achieve the effect of generating the top plate template lofting diagram; and, the interface is reserved between the fixed template and the loose template of the beam template, which is convenient for installation when the beam template is installed on site, and the column head template leaves the construction error at the column head position for easy adjustment, so as to achieve the effect of facilitating construction.

[0010] Furthermore, in step S1, according to the correspondence between the plane and the Rhino drawings, the Rhino model is converted into a CAD drawing, and the graphics at corresponding positions are selected for each beam and each plate, and the keel spacing is divided to form the final template detailed design drawing.

[0011] By adopting the above technical solution, the plane and Rhino drawings correspond to each other to form the final template detailed design drawing, thereby achieving the effect of forming the final template detailed design drawing.

[0012] Furthermore, the keel spacing is controlled within 300 mm.

[0013] Furthermore, in step S1, the dimensions of the plan view are referenced for verification when transferring the image to determine the projection Figure 1 After the detailed drawing is completed, it will be reviewed with the design unit to ensure that it meets the design requirements. After the detailed drawing is correct, the template processing will be carried out.

[0014] By adopting the above technical solution, the drawings are checked when they are transferred, and after the detailed drawings are completed, they are reviewed with the design unit to ensure the accuracy of the drawings, thereby achieving the effect of ensuring the accuracy of the drawings.

[0015] Furthermore, in step S1, before the construction of the support system, the support system of the lower formwork of the special-shaped plate is pre-arranged by area using the template processing diagram through CAD software to ensure the spatial positioning of the vertical poles.

[0016] By adopting the above technical solution, the support is designed through CAD software, and the support system is pre-arranged to ensure the normal erection of the support system and achieve the effect of normal erection of the support system.

[0017] Furthermore, in the processing of the shaped wooden secondary keel in step S2, the shaped wooden secondary keel is processed by using a CNC machine tool to roll the entire wood, and after the shape is finalized, it is checked with the processing drawing, and after the shape and size are correct, it is numbered and placed.

[0018] By adopting the above technical solution, a CNC machine tool is used to roll the whole wood, so that the model and specifications of the rolled keel are more accurate. After finalization, it is checked again to make the model and specifications of the keel more accurate, thereby achieving the effect of making the model and specifications of the keel more accurate.

[0019] Furthermore, in the panel processing of step S2, the wooden template is steamed, and then pressure is slowly applied to the steamed wooden template in the mold to bend the wooden template into the final required shape. After completion, it is placed in a ventilated and cool environment for air drying. When the template reaches a balanced moisture content, the shaped wooden template is removed from the mold and fixed to the shaped wooden keel.

[0020] By adopting the above technical solution, the wooden template is steamed and becomes soft and tough, so that the strength of the wooden template is higher, thereby achieving the effect of improving the strength of the wooden template.

[0021] Furthermore, in step S2, after the template processing is completed, the template is pre-assembled in the processing plant, the template is inspected and accepted, and the template is inspected again after entering the site.

[0022] By adopting the above technical solution, the template is inspected and accepted in the factory to ensure the quality of the template, thereby ensuring the quality of the construction. After the template arrives at the site, it is inspected again to eliminate the templates of poor quality, thereby ensuring the quality of the template used in the construction and achieving the effect of improving the construction quality.

[0023] Furthermore, in step S2, after the template is installed, the three-dimensional spatial position of the template is reviewed. On site, only the projection position of each beam on the horizontal plane and the elevation of the beam end and the beam center need to be reviewed.

[0024] By adopting the above technical solution, the three-dimensional spatial position of the template is aligned, thereby ensuring the construction accuracy of the heterogeneous beams and slabs, thereby achieving the effect of improving the accuracy of the construction.

[0025] Furthermore, the beam side is wrapped down by 80mm, leaving 15mm of adjustment space.

[0026] Compared with the prior art, the beneficial technical effects of the present invention are:

[0027] The construction method of the special-shaped curved concrete roof panel of the present invention designs the template and the support through the Rhino UV grid. The manufacturer makes the template according to the processing drawing, installs the made template on site, and pours concrete after installation. Since the template is prefabricated, the template can be set up and the concrete can be poured, which is convenient for construction. At the same time, the model and specification of the keel can be made more accurate, the strength of the wooden template can be higher, and the quality of the template used in the construction can be effectively guaranteed, thereby achieving the effect of improving the construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a diagram of setting up curved beams and panel frames in the construction method of the special-shaped curved concrete roof panel of the present invention;

[0030] Figure 2 It is a schematic diagram of the beam-slab node template processing in the special-shaped curved concrete roof panel construction method of the present invention;

[0031] Figure 3 It is a schematic diagram of the processing of the beam tension bolt nodes in the construction method of the special-shaped curved concrete roof panel of the present invention;

[0032] Figure 4 The present invention is a plan view of the beam-slab-column node processing in the construction method of the special-shaped curved concrete roof panel. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] In the description of the present invention, it should be understood that the terms "length", "width", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The following is combined with Figure 1-4The present invention is described in further detail.

[0037] The construction method of the special-shaped curved concrete roof panel according to the embodiment of the present invention comprises the following steps:

[0038] S1. Reference Figure 1 , Design of formwork for special-shaped curved concrete structure roof panels:

[0039] S11. Template deepening design Rhino UV grid fitting establishes the surface to ensure the design appearance: According to the plane contour map provided by the design, the Rhino UV grid map is used to extract points from the grid, output a three-dimensional coordinate point cloud system, and generate a three-dimensional positioning map of the structural space. This map is superimposed on the curved roof modeling lofting map to determine the elevation and curvature of the intersection of the plate and beam, and the beam side template and beam bottom template are lofted according to the elevation, curvature and beam section; after confirmation, the top plate template lofting map is generated according to the curved roof modeling lofting map and the beam position map. According to the correspondence between the plane and Rhino maps, the Rhino model is converted into a CAD map; when transferring the map, refer to the plane drawing size for verification to determine the projection Figure 1 For each beam and each plate, the graphics at the corresponding position are selected to divide the keel spacing. Among them, the keel spacing is guaranteed to be controlled within 300mm to form the final template detailed design drawing. After the detailed drawing is completed, it is reviewed with the design unit to ensure that it meets the design requirements. After the detailed drawing is correct, the template is processed.

[0040] S12. Support design: Before the construction of the support system, the support system of the special-shaped plate under the formwork is pre-arranged by area using the template processing diagram through CAD software to ensure the spatial positioning of the vertical pole. The support system adopts a disc-type scaffolding system, and a fastener scaffolding (diagonal brace) is added to the larger part of the curved surface to solve the problem of excessive curved surface support stability.

[0041] S2, reference Figure 2 , Figure 3 and Figure 4 , Construction of special-shaped curved concrete structure roof panel formwork:

[0042] S21. Formwork processing: Processing and manufacturing of special-shaped curved concrete structure roof panel formwork, using CNC machine tools to process molds and shaped wooden keels according to the processing drawings. Processing of shaped wooden secondary keels: Use CNC machine tools to roll the entire wood, check with the processing drawings after shaping, and place them after the shape and size are correct. Panel processing: Steam the wooden formwork to make it soft and tough, then slowly apply pressure to the steamed wooden formwork in the mold to bend the wooden formwork into the final required shape. After completion, place it in a ventilated and cool environment for air drying. When the formwork reaches a balanced moisture content, remove the shaped wooden formwork from the mold and fix it to the shaped wooden keel.

[0043] After production is completed, the manufacturer will number each template according to the drawings to facilitate on-site assembly and construction. When selecting the template panel, you need to pay attention to whether the surface of the laminated wood plywood is smooth, whether there is any damage, whether there are gaps or distortions in the plywood layer, whether the edges are neat, whether the thickness and length tolerances meet the requirements, etc. When selecting rectangular square tubes, pay attention to whether the rectangular square tubes are straight, whether the surface in contact with the panel and the embedded wood surface are on the same surface, and whether there is any inequality in height.

[0044] S22. Acceptance and storage of the finalized formwork for the roof panels of special-shaped curved concrete structures, and acceptance at the processing plant: After the finalized formwork is processed and passed the inspection, the formwork is pre-assembled in the processing plant to ensure that the joints can be interlaced. After pre-assembly, two center control lines are marked on the back of the formwork. When the formwork is installed, the formwork control lines are aligned. Before the product leaves the factory, the technical and quality inspection personnel of the special-shaped formwork processing plant will conduct a comprehensive inspection of the product quality to ensure that unqualified products or products with quality risks do not leave the factory. Each formwork must have a certificate of conformity and be signed by a quality inspector. The certificate of conformity is affixed to the top of the formwork and sent to the construction site with the formwork. The quality inspection status of each formwork is archived in the factory for inspection.

[0045] S23. On-site acceptance: Before the finalized formwork for beams and slabs is brought to the site, it is necessary to check against the material list to confirm whether there are any missing or insufficient parts in the formwork; the size, material and appearance quality of the finalized formwork shall be inspected based on the beam and slab numbers and detailed drawings.

[0046] S24. Storage: Place the finalized template on the hard ground after leveling. The ground should be hardened and free of water. The boards should face each other. There should be no debris or protrusions between the boards. Boards with similar curvature and specifications should be stacked together. The highest layer should not exceed 3. Special-shaped boards with large curvature changes should be placed separately. Stacking is prohibited. The upper part of the template should be covered with waterproof canvas, and the lower part should be padded with 100×100mm wooden squares to prevent water immersion and deformation. At the same time, the template stacking height should not exceed 1m. The semi-finished templates that have been processed and formed should be marked according to the requirements and specifications to facilitate the collection and use during construction.

[0047] S25. Formwork installation: hoist the formwork into place according to the formwork number; after initial fixation, adjust the position and joints of the formwork, and splice the adjusted formwork together with connectors; tighten the connecting bolts on the beam side formwork and lock the threaded nuts; after the formwork is installed, check the overall construction status of the formwork and strengthen the local parts according to the node requirements.

[0048] The beam-slab node formwork processing, the beam formwork of the present invention adopts the beam side wrapping beam bottom method, the beam side wraps 80mm below, and reserves 15mm adjustment space. During the construction process, the beam side adjusts the corresponding height according to the site conditions. The interface is reserved between the fixed formwork and the loose formwork to facilitate on-site connection.

[0049] The beam-slab-column joints are processed and the column head templates are assembled according to the actual situation on site. The construction error is left at the column head position for easy adjustment.

[0050] Treatment of the joints of the overall template panel. When processing and assembling large templates, add sealing strips or sponge strips in the joints, and apply 2-3 coats of edge sealing paint on the cut edges of the template. Use special tools to apply glue on the back of the template joints. After applying glue, stick the sealing strip along the joints, compact it with wooden strips, nail it with nails, and stick tape. When processing the template, the template panel protrudes from the frame by no less than 2mm. When installing the template, add rubber sealing tape between the vertical frames to protect the panel and ensure the quality of the vertical joints. During the production and installation of the finalized template, strengthen the inspection of the template, mainly check the height difference between adjacent panels, the gap between panels, and the connection between the template panel and the keel. Add channel steel connections between adjacent templates, and add steel pipe diagonal braces. When tightening the tension bolts and special-shaped connection bolts, apply force evenly to ensure that the adjacent tension bolts and clamps are subjected to the same force to avoid uneven deformation of the template. When processing the template, ensure that the template cross-sectional dimensions, thickness, diagonal dimensions, etc. are uniform. Pre-assemble the template to ensure that the joints can be interlaced. After pre-assembly, draw two center control lines on the back of the template. When installing the template, align the template control lines.

[0051] To ensure the construction accuracy of the special-shaped beam and slab, the three-dimensional spatial position of the template is reviewed after the template is installed. Since the curved template has been pre-assembled at the manufacturer, the spatial position of each beam is determined, that is, the position of the bottom template of the slab is determined. On-site verification only requires reviewing the projection position of each beam on the horizontal plane and the elevation of the beam end and the middle of the beam. After verification, the next step of the construction is carried out.

[0052] S26, Concrete pouring: The slump on site is controlled below 160mm, and the slump is adjusted at any time according to the actual situation on site; the order of concrete pouring is from top to bottom, and a pouring belt is set every 2 meters; before pouring the special-shaped slab with a steeper slope, a panel is attached to the part with a larger slope, and the concrete anti-slip measures use large-mesh wire mesh with a spacing of 500mm. The beams along the direction of the slab are inserted with wooden blocks to intercept and the anti-slip measures are taken according to the degree of solidification; the slab thickness is controlled by the fixed concrete pouring floor slab thickness controller, and manual measurement is used to assist the control to ensure the slab thickness. The slope in some areas of the special-shaped beam slab is steeper. In order to ensure the safety of workers during the concrete pouring construction, customized wooden ladders are used to go up and down.

[0053] The construction method of the special-shaped curved concrete roof panel of the present invention designs the template and the support through the Rhino UV grid. The manufacturer makes the template according to the processing drawing, installs the made template on site, and pours concrete after installation. Since the template is prefabricated, the template can be set up and the concrete can be poured, which is convenient for construction. At the same time, the model and specification of the keel can be made more accurate, the strength of the wooden template can be higher, and the quality of the template used in the construction can be effectively guaranteed, thereby achieving the effect of improving the construction quality.

[0054] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A construction method for a special-shaped curved concrete roof panel, characterized in that: The following steps are involved: S1. Design of formwork for roof panels of special-shaped curved concrete structures: In-depth design of formwork. Use Rhino UV grid fitting to establish curved formwork. According to the plane contour map provided by the design, use Rhino UV grid map, extract points from the grid, output a three-dimensional coordinate point cloud system, generate a three-dimensional positioning map of the structure space, superimpose the three-dimensional positioning map of the structure space with the curved roof modeling lofting map, determine the elevation and curvature of the intersection of the plate and beam, and loft the beam side formwork and beam bottom formwork according to the elevation, curvature and beam section. Generate the top plate formwork lofting map by connecting multiple points based on the curved roof modeling lofting map and the beam position map; then design the support system; S2. Construction of formwork for roof panels of special-shaped curved concrete structures: first, the formwork is processed, which includes processing of shaped wooden keels and panels; then, on-site assembly is carried out to install the processed formwork, wherein the beam formwork adopts the beam side wrapping beam bottom method. During the construction process, the beam side is adjusted to the corresponding height according to the on-site conditions, an interface is reserved between the fixed formwork and the loose formwork, and the column head formwork is loosely assembled according to the actual on-site conditions, and the construction error is left at the column head position; finally, concrete pouring is carried out.

2. A method for constructing a special-shaped curved concrete roof panel according to claim 1, characterized in that: In step S1, according to the correspondence between the plane and the Rhino model, the Rhino model is converted into a CAD drawing, and the graphics at the corresponding positions are selected for each beam and each plate, and the keel spacing is divided to form the final template detailed design drawing.

3. The construction method of a special-shaped curved concrete roof panel according to claim 2, characterized in that: The keel spacing is controlled within 300 mm.

4. The construction method of a special-shaped curved concrete roof panel according to claim 2, characterized in that: In step S1, the dimensions of the plan view are referenced for verification when transferring the drawing to ensure that the projection view is consistent. After the detailed drawing is completed, it is reviewed with the design unit to ensure that it meets the design requirements. After the detailed drawing is correct, the template is processed.

5. The construction method of a special-shaped curved concrete roof panel according to claim 1, characterized in that: In the step S1, before the construction of the support system, the support system of the lower formwork of the special-shaped plate is pre-arranged by area using the template processing diagram through CAD software to ensure the spatial positioning of the vertical poles.

6. The construction method of a special-shaped curved concrete roof panel according to claim 1, characterized in that: In the processing of the shaped wooden secondary keel in step S2, the shaped wooden secondary keel is processed by using a CNC machine tool to roll the whole wood, and after the shape is finalized, it is checked with the processing drawing, and after the shape and size are correct, it is numbered and placed.

7. The construction method of a special-shaped curved concrete roof panel according to claim 1, characterized in that: In the panel processing of step S2, the wooden template is steamed, and then pressure is slowly applied to the steamed wooden template in the mold to bend the wooden template into the final required shape. After completion, it is placed in a ventilated and cool environment for air drying. When the template reaches a balanced moisture content, the shaped wooden template is removed from the mold and fixed to the shaped wooden keel.

8. The construction method of a special-shaped curved concrete roof panel according to claim 1, characterized in that: In step S2, after the template processing is completed, the template is pre-assembled in the processing plant, and the template is inspected and accepted, and the template is inspected again after entering the site.

9. The construction method of a special-shaped curved concrete roof panel according to claim 8, characterized in that: In step S2, after the template is installed, the three-dimensional spatial position of the template is reviewed. On site, only the projection position of each beam on the horizontal plane and the elevation of the beam end and the beam center need to be reviewed.

10. A construction method for a special-shaped curved concrete roof panel according to any one of claims 1 to 9, characterized in that: In step S2, the beam side is wrapped down by 80 mm, leaving 15 mm of adjustment space.

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