Construction method of arc wall double-line metal formwork based on BIM technology

Abstract

The application relates to the field of building construction engineering, in particular to a construction method of a circular-arc-wall double-line metal formwork based on BIM technology, which comprises the following steps: establishing a BIM model according to a construction scheme; designing inner and outer formworks of the circular-arc wall based on the established BIM model and outputting design drawings; manufacturing the inner and outer formworks according to the design drawings; marking all the inner and outer formworks and pre-assembling all the inner and outer formworks; on-site installing the inner and outer formworks after pre-assembling and setting wall steel bars between the on-site installed inner and outer formworks; and pouring concrete between the inner and outer formworks to form the circular-arc wall. The metal formwork is used to replace the traditional wood formwork, the metal formwork is designed through the BIM model, processed and pre-assembled in a factory, and then transported to a construction site for assembly, so that the construction speed is increased, the installation is convenient, the materials can be repeatedly used, and the material waste is reduced.

Description

Technical Field

[0001] This invention relates to the field of building construction engineering, and specifically to a construction method for a double-line metal formwork for an arc wall based on BIM technology. Background Technology

[0002] With the development of architecture, people have higher and higher requirements for the shape and artistic beauty of buildings. This has led to buildings no longer being monotonous rectangles, but rather special shapes with various curved surfaces and arcs, in order to create more beautiful shapes.

[0003] In existing construction, the construction of curved walls uses wooden formwork to form an approximate arc shape. However, the on-site fabrication of curved formwork is cumbersome, involves a large investment of materials, and is complex in construction operations. In addition, wooden formwork has low strength and is prone to bulging. In order to meet the corresponding dimensions, wooden formwork needs to be cut extensively during the fabrication process, which leads to a low material reuse rate. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a construction method for a double-line metal formwork for an arc wall based on BIM technology. This method solves the problems of cumbersome manufacturing, large material investment, complex construction operations, easy bulging of the formwork due to strength and angle, and low material reuse rate in the construction of existing arc walls using wooden formwork.

[0005] The technical solution to achieve the above objectives is:

[0006] This invention provides a construction method for a double-line metal formwork for an arc-shaped wall based on BIM technology, comprising the following steps:

[0007] A BIM model was created based on the construction plan for the curved wall;

[0008] Based on the established BIM model, the inner and outer formwork of the curved wall is designed, and the design drawings of the inner and outer formwork are output.

[0009] The inner and outer templates are manufactured according to the design drawings.

[0010] Mark all internal and external templates and pre-assemble all internal and external templates;

[0011] The pre-assembled inner and outer formwork is installed on site, and wall reinforcement is installed between the inner and outer formwork installed on site.

[0012] Concrete is poured between the inner and outer formwork to form an arc wall.

[0013] A further improvement of the construction method for the double-line metal formwork of the arc wall based on BIM technology in this invention is that it also includes:

[0014] Based on the established BIM model, calculate whether the stiffness of the curved wall meets the design requirements;

[0015] If the stiffness does not meet the design requirements, the design parameters of the curved wall in the BIM model will be adjusted until the calculated stiffness of the curved wall meets the design requirements.

[0016] A further improvement of the construction method of the double-line metal formwork for the arc wall based on BIM technology is that, when designing the inner and outer formwork of the arc wall based on the BIM model, the BIM model is used to check the hole positions and collisions of the designed inner and outer formwork.

[0017] When a mismatch is found in the hole position, the corresponding hole position should be adjusted.

[0018] When a collision is detected between the inner and outer templates, the collision position between the inner and outer templates is adjusted.

[0019] A further improvement of the construction method of the double-line metal formwork for the arc wall based on BIM technology in this invention lies in the fact that when designing the inner and outer formwork of the arc wall based on the BIM model;

[0020] The shapes of the inner and outer formwork are designed using the shapes of the inner and outer surfaces of the curved wall;

[0021] Connecting plates for splicing are designed on the outer surfaces of the inner and outer templates, and connecting holes are provided at corresponding positions on the connecting plates;

[0022] Multiple support ribs are installed between the upper and lower connecting plates.

[0023] A further improvement of the construction method for the double-line metal formwork of the arc wall based on BIM technology in this invention is that it also includes:

[0024] The arrangement of tie rods is designed based on the support requirements of the inner and outer templates.

[0025] A further improvement of the construction method for the double-line metal formwork of the arc wall based on BIM technology in this invention is that it also includes:

[0026] The placement of the reinforcing back braces is designed based on the support requirements of the inner and outer templates.

[0027] A further improvement of the construction method of the double-line metal formwork for the arc wall based on BIM technology is that, when installing the inner and outer formwork on site, a reinforcing back rib is set at the splicing position of the inner and outer formwork for reinforcement.

[0028] The further improvement of the construction method of the double-line metal formwork for the arc wall based on BIM technology in this invention lies in the fact that the concrete is poured in a segmented, symmetrical and layered manner.

[0029] A further improvement of the construction method of the double-line metal formwork for the arc wall based on BIM technology is that a release agent is applied to the inner and outer surfaces of the formwork during on-site installation of the inner and outer formwork.

[0030] A further improvement of the construction method of the double-line metal formwork for the arc wall based on BIM technology of the present invention is that, after removing the inner and outer formwork of the lower arc wall, an adjustable-height top support is installed on the top of the lower arc wall, and the bottom formwork of the upper arc wall is supported by the installed top support.

[0031] The beneficial effects of the construction method for the double-line metal formwork of the arc wall based on BIM technology of this invention are as follows:

[0032] The construction method of this invention uses metal formwork instead of traditional wooden formwork. The metal formwork is designed using BIM model drawings, processed and pre-assembled in the factory, and then transported to the construction site for assembly. It has the advantages of fast construction speed, convenient installation, reusable materials, and reduced material waste.

[0033] The construction method of this invention utilizes metal formwork, which ensures that the surface lines of the curved wall are flat and aesthetically pleasing, and eliminates the problems of seams and grout leakage caused by traditional wooden formwork construction.

[0034] The construction method of this invention employs BIM technology and a combination of steel and aluminum alloy formwork. Through BIM design, stiffness can be simulated and calculated first, followed by 3D visualization to check for collisions. Simulated pre-assembly using BIM facilitates the identification of problems before on-site installation, providing assurance for subsequent on-site assembly. Attached Figure Description

[0035] Figure 1 This is a flowchart illustrating the construction method of the double-line metal formwork for an arc-shaped wall based on BIM technology, as described in this invention.

[0036] Figure 2 This is a schematic diagram of the building BIM model established in the construction method of the arc wall double-line metal formwork based on BIM technology of the present invention.

[0037] Figure 3 This is a structural schematic diagram of the building BIM model established in the construction method of the curved wall double-line metal formwork based on BIM technology of the present invention, from another perspective.

[0038] Figure 4 for Figure 3 The top view of the BIM model shown.

[0039] Figure 5This is an enlarged schematic diagram of an arc wall model in the BIM model established in the construction method of the arc wall double-line metal formwork based on BIM technology of the present invention.

[0040] Figure 6 for Figure 5 The diagram shows the reinforcement details of the circular arc wall model.

[0041] Figure 7 This is a schematic diagram of the outer formwork of an arc wall in the construction method of the arc wall double-line metal formwork based on BIM technology of the present invention. Detailed Implementation

[0042] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0043] See Figure 1 This invention provides a construction method for a double-line metal formwork for an arc-shaped wall based on BIM technology. It employs BIM technology and a combined steel-aluminum alloy formwork construction technique. Through BIM design, stiffness can be simulated and calculated first, followed by 3D visualization to check for collisions. Pre-assembly simulation is then performed after BIM simulation, which helps identify problems before on-site installation, providing assurance for later on-site assembly. The construction method for the double-line metal formwork for an arc-shaped wall based on BIM technology according to this invention will be described below with reference to the accompanying drawings.

[0044] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0045] See Figure 1 The flowchart illustrates the construction method of the double-line metal formwork for curved walls based on BIM technology according to the present invention. The following is in conjunction with... Figure 1 The present invention describes the construction method of the double-line metal formwork for arc walls based on BIM technology.

[0046] like Figure 1 As shown, the construction method of the double-line metal formwork for the arc wall based on BIM technology of the present invention includes the following steps:

[0047] Perform step S11 to create a BIM model based on the construction plan for the curved wall; then perform step S12.

[0048] Execute step S12, based on the established BIM model, design the inner and outer formwork for the curved wall, and output the design drawings of the inner and outer formwork; then execute step S13.

[0049] Execute step S13 to create the inner and outer templates according to the design drawings; then execute step S14.

[0050] Perform step S14 to mark all inner and outer templates and pre-assemble all inner and outer templates; then perform step S15.

[0051] Execute step S15 to install the pre-assembled inner and outer formwork on site, and set the wall reinforcement between the inner and outer formwork installed on site; then execute step S16.

[0052] Perform step S16 to pour concrete between the inner and outer formwork to form an arc wall.

[0053] Furthermore, combined Figure 2 As shown, a building BIM model 20 is established, which includes a curved wall model 21. The construction plan includes structural drawings, architectural drawings, and detailed node drawings. The building BIM model 20 is established using the construction plan, and BIM technology is used to simulate the layout. The stiffness, stability, and safety of each component in the building are calculated to ensure they meet the requirements. The results are compared with the construction requirements, and if the requirements are not met, corresponding adjustments are made.

[0054] Specifically, based on the established BIM model, the stiffness of the curved wall is calculated to see if it meets the design requirements. If the stiffness does not meet the design requirements, the design parameters of the curved wall in the BIM model are adjusted until the calculated stiffness of the curved wall meets the design requirements.

[0055] Furthermore, by utilizing BIM technology, we can check whether the connection holes between the various internal and external templates correspond, whether there are any collisions between the templates, whether there are any missing templates, whether there are any missing back ribs, and whether the specifications of the back ribs meet the requirements. This allows us to identify problems in advance and make timely adjustments.

[0056] Specifically, when designing the inner and outer formwork of the curved wall based on the BIM model, the BIM model is used to check the hole positions and collisions of the designed inner and outer formwork.

[0057] When a mismatch is found in the hole position, the corresponding hole position should be adjusted.

[0058] When a collision is detected between the inner and outer templates, the collision position between the inner and outer templates is adjusted.

[0059] Furthermore, when designing the inner and outer formwork of a curved wall based on a BIM model;

[0060] like Figure 7 As shown, the shapes of the inner and outer templates 31 are designed using the shapes of the inner and outer surfaces of the arc wall;

[0061] A connecting plate 32 for splicing is designed on the outer side of the inner template and the outer template 31, and a connecting hole is provided at the corresponding position of the connecting plate 32;

[0062] Multiple support ribs 33 are provided between the upper and lower connecting plates 32. Preferably, the shape of the support ribs 33 is consistent with the shape of the left and right connecting plates 32.

[0063] like Figures 3 to 6 As shown, BIM technology is used to simulate the design of the arc wall and analyze whether it meets the design requirements. Then, BIM technology is used to design the template of the arc wall. The shape and size of the template are designed according to the arc shape and size. Then, the template is processed based on the design. The processing of the template includes profile cutting, punching, folding, welding, punching, etc.

[0064] Furthermore, all incoming templates are divided into zones and units, and then pre-assembled to check for any missing template components and whether the assembly is smooth. If any problems are found, they can be resolved in a timely manner.

[0065] Furthermore, during the on-site installation of the inner and outer formwork, a release agent is applied to the inner surfaces of the formwork. A water-based release agent is used to ensure the visual quality of the concrete surface.

[0066] Furthermore, in areas with continuous vertical formwork, such as elevator shafts and exterior walls, a flat formwork outer perimeter is used to enclose the floor slab. This outer perimeter can also serve as a connecting component for the upper layer of vertical formwork. After the first layer of concrete is poured, a second layer of flat formwork outer perimeter is installed to fix it to the remaining formwork from the previous layer. This second layer of flat formwork outer perimeter is fixed to the upper perimeter of the wall formwork. After the concrete is poured, the upper flat formwork outer perimeter is retained as the starting point for the next layer of wall formwork.

[0067] Furthermore, the curved wall is reinforced with double-layered steel bars, with the diameter of the upper and lower layers of steel bars being 8mm and the spacing being 200mm.

[0068] In one specific embodiment of the present invention, it further includes:

[0069] The arrangement of tie rods is designed based on the support requirements of the inner and outer templates.

[0070] When installing tie bolts, a PVC pipe is fitted onto the tie bolt to ensure accurate contact between the PVC pipe and the surfaces of the inner and outer formwork, so that the tie bolt can be retracted after pouring.

[0071] Furthermore, it also includes:

[0072] The placement of the reinforcing back braces is designed based on the support requirements of the inner and outer templates.

[0073] For the installation of tie bolts on the inner and outer formwork of the curved wall, the tie bolts are arranged at intervals in the horizontal direction, with a maximum horizontal spacing of 1000mm.

[0074] In the vertical direction, five reinforcing rings are added to the outer sides of both the inner and outer formwork, with vertical spacing of 250mm, 550mm, 800mm, and 900mm. Through-wall tie rods and back ribs are used to ensure the rigidity and overall stability of the formwork system.

[0075] The template support uses a pin-pin connection.

[0076] Preferably, during on-site installation of the inner and outer formwork, reinforcing ribs are installed at the joints between the inner and outer formwork for reinforcement. The installation of reinforcing ribs at the joints ensures the verticality of the double-layered joints in the extra-wide and extra-high walls. Two reinforcing ribs are installed for the wall formwork, with spacing of 550mm and 1500mm from bottom to top, using 80*30*2.5 square tubing. After installation, an inspection is conducted.

[0077] Furthermore, when pouring concrete, a segmented, symmetrical, and layered pouring method is adopted.

[0078] The wall cannot be poured in one go. If the concrete does not have an initial setting time, the lateral pressure will be quite large, which will easily cause the formwork to expand. It should be poured in sections, symmetrically and in layers. Layered pouring is conducive to the release of gas in the concrete.

[0079] Furthermore, after removing the inner and outer formwork of the lower arc wall, an adjustable-height top support is installed on the top of the lower arc wall to support the bottom formwork of the upper arc wall.

[0080] The double-layered lines of the lower arc-shaped wall are removed, and the upper formwork is fitted with adjustable supports, with one support every 80cm, and the supports should be denser at the corners.

[0081] The formwork must be removed only after the concrete has reached the required strength as specified in the specifications. During removal, the formwork must not be hammered forcefully to avoid deformation. Removed formwork should be cleaned up promptly; any warping or deformation should be repaired immediately, and damaged surfaces should be patched. When removing double-layer moldings on curved walls, avoid hammering forcefully at corners and the top and bottom moldings to prevent chipping or breakage.

[0082] This invention employs BIM technology and a combined steel-aluminum alloy formwork construction technique. Through BIM design, stiffness can be simulated and calculated first, followed by 3D visualization to check for collisions. Simulated pre-assembly using BIM facilitates the identification of problems before on-site installation, providing assurance for subsequent on-site assembly.

[0083] The shear wall formwork of this invention uses steel and aluminum prefabricated molds. Compared with the traditional construction method of using wooden formwork and pouring concrete on site, the shear wall surface of this method has a smooth and beautiful arc-shaped line after construction, and can eliminate the joints and grout leakage caused by traditional wooden formwork construction.

[0084] The features of this invention's assembly and installation are: modular production, numbering of each component, one-to-one installation on the construction site, fast construction speed, convenient installation, fewer on-site workers, convenient on-site installation and management, greatly improving work efficiency, effectively ensuring the construction period, and materials can be reused, reducing material waste. Prefabricated construction, a three-in-one structure, beams and slabs connected as a whole, strong impact resistance, anchored using steel structure methods, high wall line strength, good integrity, and no deformation.

[0085] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A construction method for a double-line metal formwork for an arc-shaped wall based on BIM technology, characterized in that, Includes the following steps: A BIM model was created based on the construction plan for the curved wall; Based on the established BIM model, the inner and outer formwork of the curved wall is designed, and the design drawings of the inner and outer formwork are output. The inner and outer templates are manufactured according to the design drawings. Mark all internal and external templates and pre-assemble all internal and external templates; The pre-assembled inner and outer formwork is installed on site, and wall reinforcement is installed between the inner and outer formwork installed on site. Concrete is poured between the inner and outer formwork to form an arc wall.

2. The construction method of the double-line metal formwork for the arc wall based on BIM technology as described in claim 1, characterized in that, Also includes: Based on the established BIM model, calculate whether the stiffness of the curved wall meets the design requirements; If the stiffness does not meet the design requirements, the design parameters of the curved wall in the BIM model will be adjusted until the calculated stiffness of the curved wall meets the design requirements.

3. The construction method of the double-line metal formwork for the arc wall based on BIM technology as described in claim 1, characterized in that, When designing the inner and outer formwork of a curved wall based on a BIM model, the BIM model is used to check the hole positions and collisions of the designed inner and outer formwork. When a mismatch is found in the hole position, the corresponding hole position should be adjusted. When a collision is detected between the inner and outer templates, the collision position between the inner and outer templates is adjusted.

4. The construction method of the double-line metal formwork for the arc wall based on BIM technology as described in claim 1, characterized in that, When designing the inner and outer formwork of a curved wall based on a BIM model; The shapes of the inner and outer formwork are designed using the shapes of the inner and outer surfaces of the curved wall; Connecting plates for splicing are designed on the outer surfaces of the inner and outer templates, and connecting holes are provided at corresponding positions on the connecting plates; Multiple support ribs are installed between the upper and lower connecting plates.

5. The construction method of the double-line metal formwork for the arc wall based on BIM technology as described in claim 1, characterized in that, Also includes: The arrangement of tie rods is designed based on the support requirements of the inner and outer templates.

6. The construction method of the double-line metal formwork for the arc wall based on BIM technology as described in claim 1, characterized in that, Also includes: The placement of the reinforcing back braces is designed based on the support requirements of the inner and outer templates.

7. The construction method of the double-line metal formwork for the arc wall based on BIM technology as described in claim 1, characterized in that, When installing the inner and outer formwork on site, reinforced back ribs are installed at the joints of the inner and outer formwork for reinforcement.

8. The construction method of the double-line metal formwork for the arc wall based on BIM technology as described in claim 1, characterized in that, When pouring concrete, the concrete is poured in sections, symmetrically, and in layers.

9. The construction method of the double-line metal formwork for the arc wall based on BIM technology as described in claim 1, characterized in that, When installing the inner and outer formwork on site, apply a release agent to the inner surfaces of the inner and outer formwork.

10. The construction method of the double-line metal formwork for the arc wall based on BIM technology as described in claim 1, characterized in that, After removing the inner and outer formwork of the lower arc wall, an adjustable-height top support is installed on the top of the lower arc wall to support the bottom formwork of the upper arc wall.

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