Construction method of special-shaped curved surface cylinder concrete structure

Abstract

This invention relates to a construction method for an irregularly shaped curved cylindrical concrete structure. The method utilizes BIM technology to create a three-dimensional model of the cylindrical concrete structure. Based on this model, a three-dimensional model of the template structure is created, dividing the template structure into several unit templates and obtaining the number, size, and installation position of each unit template. The arrangement of the unit templates is simulated to obtain a suitable template construction plan. According to the template construction plan, the unit templates are assembled on the construction surface at the designed positions of the cylindrical concrete structure to form an irregularly shaped curved template structure. Concrete is poured into the template structure to form the irregularly shaped curved cylindrical concrete structure. This invention improves the accuracy of template assembly and ensures the quality of concrete forming.

Description

Technical Field

[0001] This invention relates to the field of building technology, and specifically to a construction method for an irregularly shaped curved cylindrical concrete structure. Background Technology

[0002] Traditional building facades have been replaced by various flexible and varied curved structures, and a constant stream of irregularly shaped concrete structures has emerged, bringing certain challenges to their construction. Specifically, the construction of irregularly shaped curved cylindrical concrete structures, whose cylinders are irregular cones with shapes that develop and deform unpredictably from bottom to top, presents a highly complex construction process. Typically, formwork is assembled according to construction drawings, and any deviation in the formwork assembly will affect the final shape of the irregular curved surface. Therefore, ensuring the accuracy of the forming of irregularly shaped curved cylindrical concrete structures is a crucial technical problem that this application aims to solve. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a construction method for irregular curved cylindrical concrete structures, so as to solve the problem that existing formwork construction methods cannot ensure the accuracy of the forming of curved cylindrical concrete structures.

[0004] To achieve the above objectives, the present invention provides a construction method for an irregularly shaped curved cylindrical concrete structure, comprising the following steps:

[0005] Using BIM technology to create a three-dimensional model of the cylindrical concrete structure;

[0006] Based on the three-dimensional model of the cylindrical concrete structure, a three-dimensional model of the template structure is established, the template structure is divided into several unit templates, and the number, size and installation position of each unit template are obtained.

[0007] Simulate the arrangement of the unit templates to obtain a suitable template construction plan;

[0008] According to the template construction plan, the unit templates are assembled on the construction surface at the design positions of the cylindrical concrete structure to form a template structure with an irregular curved surface shape.

[0009] Concrete is poured into the template structure to form a cylindrical concrete structure with an irregular curved surface.

[0010] This invention utilizes BIM technology to create three-dimensional models of the cylindrical concrete structure and the formwork structure. The formwork structure is divided into several unit formworks, and the number, size, and installation position of each unit formwork are obtained. The optimal construction scheme for the unit formwork is simulated and determined, which improves the accuracy of formwork assembly and ensures the effect of concrete forming.

[0011] A further improvement of the construction method of the irregular curved surface cylindrical concrete structure of the present invention is that the cylindrical concrete structure is hollow inside and the top is open.

[0012] The template structure includes an inner template layer and an outer template layer;

[0013] During the construction of the template structure, tie rods are provided. First, the unit templates of the inner template layer are assembled and connected. Then, several rows of tie rods are installed at intervals along the height direction of the inner template layer. The unit templates of the outer template layer are assembled and connected on the outside of the inner template layer. The tie rods are installed on the unit templates of the outer template layer so that the outer template layer and the inner template layer are fixed by several rows of tie rods, and a pouring space is formed between the outer template layer and the inner template layer.

[0014] A cylindrical concrete structure is formed by pouring concrete into the pouring space to create a cylindrical concrete structure with an irregular curved surface.

[0015] A further improvement of the construction method for the irregular curved cylindrical concrete structure of the present invention is that, during the construction of the template structure, a support frame is assembled inside the inner template layer, so that the support frame is supported and fixed on the inner wall of the inner template layer.

[0016] A further improvement of the construction method for the irregular curved cylindrical concrete structure of the present invention is that the end of the tie rod extends into the inner template layer to form a connection end;

[0017] When assembling the support frame, a transverse support rod and a longitudinal support rod are provided. The transverse support rod is supported and connected to the connecting ends of two oppositely arranged tie rods. The longitudinal support rod is erected vertically on the construction surface and located inside the inner formwork layer. The longitudinal support rod is fixedly connected to the transverse support rod.

[0018] A further improvement of the construction method for the irregular curved surface cylindrical concrete structure of the present invention is that each of the connecting ends corresponds to two of the transverse support rods;

[0019] When installing the horizontal support rod and the connecting end, the connecting end is clamped between the two corresponding horizontal support rods.

[0020] The tie rod extends beyond the outer template layer to form a tie end;

[0021] A further improvement of the construction method for the irregular curved cylindrical concrete structure of the present invention is that, when installing the unit template of the outer template layer, steel pipes and clamping kits are provided. The provided steel pipes are in an arc shape adapted to the outer template layer. Several pairs of steel pipes are spaced apart and placed on the outer wall of the outer template layer along the height direction of the outer template layer, so that a pair of steel pipes clamps a corresponding row of tie rods and the tie end of the tie rod extends out of the pair of steel pipes. The clamping kit is sleeved and installed on the tie end and clamped on the pair of steel pipes so that the pair of steel pipes are pressed and fixed on the outer template layer.

[0022] A further improvement of the construction method for the irregular curved surface cylindrical concrete structure of the present invention is that the concrete used is white fair-faced concrete.

[0023] A further improvement of the construction method for the irregular curved surface cylindrical concrete structure of the present invention is that a water-reducing agent is added to the concrete.

[0024] A further improvement of the construction method for irregular curved cylindrical concrete structures of the present invention is that the water-reducing agent is a naphthalene-based water-reducing agent and / or a polycarboxylate-based water-reducing agent.

[0025] A further improvement of the construction method for the irregular curved surface cylindrical concrete structure of the present invention is that, before assembling the unit template, a panel and a frame are provided, and the frame is installed and fixed on the panel along the edge of the panel;

[0026] When assembling the unit template, the edges of two adjacent unit templates are aligned and fastened together with fasteners.

[0027] A further improvement of the construction method for the irregular curved cylindrical concrete structure of the present invention is that, when installing the frame, stiffening ribs are provided, and the stiffening ribs are supported and connected within the frame. Attached Figure Description

[0028] Figure 1 This is a structural schematic diagram of the construction method for the irregular curved surface cylindrical concrete structure of the present invention.

[0029] Figure 2 This is a structural schematic diagram of the construction method for the irregular curved surface cylindrical concrete structure of the present invention.

[0030] Figure 3 This is a structural schematic diagram of the construction method for the irregular curved surface cylindrical concrete structure of the present invention.

[0031] Symbol explanation: Template structure 10, inner template layer 11, outer template layer 12, pouring space 13, unit template 14, support frame 20, horizontal support rod 21, longitudinal support rod 22, steel pipe 30, clamp kit 40, tie rod 50. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0033] This invention provides a construction method for irregularly shaped curved cylindrical concrete structures. This method utilizes experimental methods to develop high-flow-rate white fair-faced concrete. After understanding the required forming effect, it studies the factors affecting the structural forming effect, analyzes each factor, and selects the most suitable white concrete mix proportion for this project. BIM software is used for modeling, determining the steel formwork dimensions and block data, designing reinforcement methods, and detailing the steps of formwork installation, splicing, and dismantling to improve formwork accuracy and enhance concrete forming effect. The concrete pouring sequence for complex shapes is determined to ensure the quality of the fair-faced concrete forming.

[0034] The construction method of the irregular curved surface cylindrical concrete structure of the present invention will be described below with reference to the accompanying drawings.

[0035] See Figure 1 and Figure 3 In this embodiment, a construction method for an irregularly shaped curved cylindrical concrete structure includes the following steps:

[0036] S101: Use BIM technology to create a three-dimensional model of the cylindrical concrete structure;

[0037] S102: Based on the three-dimensional model of the cylindrical concrete structure, establish a three-dimensional model of the template structure 10, divide the template structure 10 into several unit templates 14, and obtain the number, size and installation position of each unit template 14.

[0038] S103: Simulate the arrangement of the unit template 14 to obtain a suitable template construction plan;

[0039] S104: According to the template construction plan, the unit template 14 is assembled on the construction surface at the design position of the cylindrical concrete structure to form a template structure 10 with an irregular curved surface shape.

[0040] S105: Pour concrete into the template structure 10 to form a cylindrical concrete structure with an irregular curved surface.

[0041] Preferably, the formwork construction plan includes the formwork installation sequence, splicing method, and dismantling sequence.

[0042] After simulating the arrangement of the unit template 14, the concrete pouring sequence is simulated.

[0043] In this embodiment, the construction method of the irregular curved cylindrical concrete structure utilizes BIM software to create a three-dimensional model of the cylindrical concrete structure and a three-dimensional model of the template structure 10. The template structure 10 is divided into several unit templates 14, and the number, size, and installation position of each unit template 14 are obtained. The optimal construction scheme of the unit template 14 is simulated and determined. The steps of template installation, splicing, and dismantling are broken down in detail, which improves the accuracy of template assembly and ensures the effect of concrete forming.

[0044] See Figure 2 and Figure 3 A further improvement in the construction method of the irregular curved surface cylindrical concrete structure in this embodiment is that the cylindrical concrete structure is hollow inside and has an open top.

[0045] The template structure 10 includes an inner template layer 11 and an outer template layer 12;

[0046] During the construction of the template structure 10, tie rods 50 are provided. First, the unit templates 14 of the inner template layer 11 are assembled and connected. Several rows of tie rods 50 are installed at intervals along the height direction of the inner template layer 11. The unit templates 14 of the outer template layer 12 are assembled and connected to the outside of the inner template layer 11. The tie rods 50 are installed on the unit templates 14 of the outer template layer 12 so that the outer template layer 12 and the inner template layer 11 are installed and fixed by several rows of tie rods 50, and a pouring space 13 is formed between the outer template layer 12 and the inner template layer 11.

[0047] Within the cast-in-place cylindrical concrete structure, concrete is poured into the casting space 13 to form a cylindrical concrete structure with an irregular curved surface.

[0048] Preferably, the unit templates 14 are arranged in several rows at intervals, with one row of the tie rods 50 corresponding to one row of the unit templates 14, and each unit template 14 has at least one tie rod 50. The straw is arranged at intervals in each row.

[0049] The outer template layer 12 and the inner template layer 11 are installed and fixed together by several rows of tie rods 50, thereby enhancing the integrity and load-bearing performance of the template structure 10.

[0050] See Figure 2 A further improvement in the construction method of the irregular curved cylindrical concrete structure in this embodiment is that, when constructing the template structure 10, a support frame 20 is assembled inside the inner template layer 11, so that the support frame 20 is supported and fixed on the inner wall of the inner template layer 11.

[0051] By providing a support frame 20 within the inner template layer 11, the inner template layer 11 is reinforced and supported.

[0052] See Figure 2 A further improvement in the construction method of the irregular curved cylindrical concrete structure in this embodiment is that the end of the tie rod 50 extends into the inner template layer 11 to form a connecting end;

[0053] When assembling the support frame 20, a transverse support rod 21 and a longitudinal support rod 22 are provided. The transverse support rod 21 is supported and connected to the connecting ends of two oppositely arranged tie rods 50. The longitudinal support rod 22 is vertically erected on the construction surface and located inside the inner formwork layer 11. The longitudinal support rod 22 is fixedly connected to the transverse support rod 21.

[0054] By installing and connecting the transverse support rod 21 and the connecting end together, the support frame 20 and the tie rod 50 are integrated into one unit, thereby effectively supporting and fixing the template structure 10.

[0055] See Figure 2 A further improvement in the construction method of the irregular curved surface cylindrical concrete structure in this embodiment is that each of the connecting ends corresponds to two of the transverse support rods 21;

[0056] When installing and connecting the transverse support rod 21 and the connecting end, the connecting end is sandwiched between the two corresponding transverse support rods 21 to enhance the support and reinforcement effect.

[0057] See Figure 2 A further improvement in the construction method of the irregular curved cylindrical concrete structure in this embodiment is that, when installing the unit template 14 of the outer template layer 12, steel pipes 30 and clamping kits 40 are provided. The provided steel pipes 30 are arc-shaped and adapted to the outer template layer 12. Several pairs of steel pipes 30 are spaced apart on the outer wall of the outer template layer 12 along the height direction of the outer template layer 12, so that a pair of steel pipes 30 clamps a corresponding row of tie rods 50 and the tie end of the tie rod 50 extends out of the pair of steel pipes 30. The clamping kit 40 is sleeved and installed on the tie end and clamped on the pair of steel pipes 30 so that the pair of steel pipes 30 are pressed and fixed on the outer template layer 12.

[0058] Preferably, after the card set 40 is fitted, a locking member is provided, which is fitted and threaded onto the tie rod 50. The position of the locking member on the tie rod 50 is adjusted by turning the locking member, thereby pressing the steel pipe 30 onto the outer template layer 12.

[0059] Preferably, the card assembly 40 is provided with a pair of card slots, and the card assembly 40 is fitted onto a pair of corresponding steel pipes 30 through the pair of card slots.

[0060] Several pairs of steel pipes 30 are spaced apart on the outer wall of the outer formwork layer 12 to reinforce the outer formwork layer 12.

[0061] The inner formwork layer 11, the support frame 20, the outer formwork layer 12, and several pairs of steel pipes 30 are connected by tie rods 50 and clamping kits 40 to form a whole, so as to support and reinforce the inner and outer sides of the formwork structure 10 respectively, ensure the firmness of the formwork structure 10, avoid the problem of formwork bulging, and ensure the molding quality of concrete.

[0062] A further improvement in the construction method of the irregular curved cylindrical concrete structure in this embodiment is that the concrete used is white fair-faced concrete.

[0063] Based on construction requirements, a uniquely shaped curved cylindrical concrete structure with appropriate color and beautiful design needs to be designed.

[0064] Before pouring concrete, experiments were conducted to develop high-flow white fair-faced concrete. Various types of cement were compared, and the cement with the most suitable whiteness was selected. The mix proportion of high-flow white concrete was determined to increase the one-time molding effect of the main structure.

[0065] White cement is a key component of white fair-faced concrete, and its quality is usually judged by its whiteness. Whiteness indicates the degree of whiteness of a material's surface, expressed as a percentage of white content. Generally, white cement is divided into four grades according to whiteness: (1) <80% is gray, insufficient whiteness; (2) 80%-84%, ordinary color grade; (3) 84%-88%, world standard quality level; (4) >88%, very white. White fair-faced concrete should use white cement with a whiteness >87%. Test blocks are made by selecting white cement of different whiteness, and the owner makes an initial color selection.

[0066] A further improvement in the construction method of the irregular curved cylindrical concrete structure in this embodiment is that a water-reducing agent is added to the concrete, which satisfies the requirements for color and effect, and also increases the fluidity of the concrete.

[0067] A further improvement in the construction method of the irregular curved cylindrical concrete structure in this embodiment is that the water-reducing agent is a naphthalene-based water-reducing agent and / or a polycarboxylate-based water-reducing agent.

[0068] Considering that fair-faced concrete usually requires one-time molding and cannot be finished later, the fluidity of the concrete should be increased as much as possible during the trial mixing process by adding water-reducing agents, such as naphthalene-based water-reducing agents and polycarboxylate-based water-reducing agents. Naphthalene-based water-reducing agents will slightly reduce the whiteness of the concrete, while polycarboxylate-based water-reducing agents have no effect on the whiteness of the concrete. Choose the appropriate water-reducing agent according to the requirements.

[0069] A further improvement in the construction method of the irregular curved surface cylindrical concrete structure in this embodiment is that, before assembling the unit template 14, a panel and a frame are provided, and the frame is installed and fixed on the panel along the edge of the panel;

[0070] When assembling the unit template 14, the edges of two adjacent unit templates 14 are aligned and fastened together with fasteners.

[0071] A further improvement in the construction method of the irregular curved cylindrical concrete structure in this embodiment is that, when installing the frame, stiffening ribs are provided, and the stiffening ribs are supported and connected inside the frame and vertically fixed to the panel.

[0072] Preferably, the fastener is a pin, which facilitates disassembly and installation.

[0073] Preferably, the tie rod 50 is a tie rod.

[0074] Due to the irregular structure, the curvature and size of each template are different. During the design process, the inner and outer templates are numbered one by one. At the same time, since the templates are ribbed, in order to address the problem of the inner template being difficult to demold, a reasonable template closing and demolding sequence is formulated, and the rib of the first template to be removed is set to be an outward octagonal shape.

[0075] To ensure that the on-site concrete casting results and quality meet the requirements and to avoid secondary construction due to substandard quality, strict requirements need to be imposed on on-site construction and curing.

[0076] Concrete mix design and raw material quality control: The cement mix ratio used in each concrete block must be strictly consistent, and the concrete spread must be greater than 400mm.

[0077] Based on the actual characteristics of the project, a pouring sequence was determined: first pour the lower structure (excluding the top), then pour the top structure. Due to the complexity of the top structure, a further pouring sequence and formwork removal sequence were also determined.

[0078] Water-soluble materials must not be used for curing white fair-faced concrete. Ensure that water-soluble materials do not come into contact with the concrete surface. Before curing, a fair-faced concrete protective agent should be applied to the concrete surface to prevent the finished product from being contaminated and to increase the brightness of the white fair-faced concrete.

[0079] After the on-site construction is completed, the supervision unit and the construction unit will be invited to conduct a quality acceptance inspection, including the implementation of the on-site plan, the forming quality and effect of the cylindrical concrete structure, and the implementation of the on-site finished product protection plan.

[0080] It should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding and reading. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

Claims

1. A construction method of a special-shaped curved cylindrical concrete structure, characterized by, Includes the following steps: Using BIM technology to create a three-dimensional model of the cylindrical concrete structure; Based on the three-dimensional model of the cylindrical concrete structure, a three-dimensional model of the template structure is established, the template structure is divided into several unit templates, and the number, size and installation position of each unit template are obtained. The arrangement of the unit templates is simulated to obtain a suitable template construction plan, thereby breaking down the installation sequence, splicing method, and dismantling sequence of the templates in detail, and simulating the concrete pouring sequence after simulating the arrangement of the unit templates. According to the template construction plan, the unit templates are assembled on the construction surface at the design positions of the cylindrical concrete structure to form a template structure with an irregular curved surface shape. A cylindrical concrete structure with an irregular curved surface is formed by pouring concrete into the template structure. The cylindrical concrete structure is hollow inside and has an open top; The template structure includes an inner template layer and an outer template layer; During the construction of the template structure, tie rods are provided. First, the unit templates of the inner template layer are assembled and connected. Then, several rows of tie rods are installed at intervals along the height direction of the inner template layer. The unit templates of the outer template layer are assembled and connected on the outside of the inner template layer. The tie rods are installed on the unit templates of the outer template layer so that the outer template layer and the inner template layer are fixed by several rows of tie rods, and a pouring space is formed between the outer template layer and the inner template layer. Inside the cast-in-place cylindrical concrete structure, concrete is poured into the casting space to form a cylindrical concrete structure with an irregular curved surface. During the construction of the template structure, a support frame is assembled inside the inner template layer so that the support frame is supported and fixed on the inner wall of the inner template layer; The end of the tie rod extends into the inner template layer to form a connection end; When assembling the support frame, a transverse support rod and a longitudinal support rod are provided. The transverse support rod is supported and connected to the connecting ends of two oppositely arranged tie rods. The longitudinal support rod is erected vertically on the construction surface and located inside the inner formwork layer. The longitudinal support rod is fixedly connected to the transverse support rod. Each of the connecting ends corresponds to two of the transverse support rods; When installing the horizontal support rod and the connecting end, the connecting end is clamped between the two corresponding horizontal support rods; The tie rod extends beyond the outer template layer to form a tie end; When installing the unit template of the outer template layer, steel pipes and clamping kits are provided. The provided steel pipes are arc-shaped to match the outer template layer. Several pairs of steel pipes are spaced apart and placed on the outer wall of the outer template layer along the height direction of the outer template layer, so that a pair of steel pipes clamps a corresponding row of tie rods and the tie end of the tie rod extends out of the pair of steel pipes. The clamping kit is sleeved and installed on the tie end and clamped on the pair of steel pipes so that the pair of steel pipes are pressed and fixed on the outer template layer.

2. The construction method of a special-shaped curved cylindrical concrete structure according to claim 1, characterized in that, The concrete used is white fair-faced concrete.

3. The construction method for the irregular curved surface cylindrical concrete structure as described in claim 1, characterized in that, The concrete contains a water-reducing agent.

4. The construction method for the irregular curved surface cylindrical concrete structure as described in claim 3, characterized in that, The water-reducing agent is a naphthalene-based water-reducing agent and / or a polycarboxylate-based water-reducing agent.

5. The construction method for the irregular curved surface cylindrical concrete structure as described in claim 1, characterized in that, Before assembling the unit template, a panel and a frame are provided, and the frame is installed and fixed on the panel along the edge of the panel; When assembling the unit template, the edges of two adjacent unit templates are aligned and fastened together with fasteners.

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