A method for integrated demolition and transportation construction of an internal model support system of a wind tunnel diffuser section

Abstract

A wind tunnel diffuser inner mold support system integrated demolition and transportation construction method, comprising the following steps: S1. integrated construction planning; S2. integrated operation preparation; S3. integrated demolition by layers; S4. integrated transportation and unloading; S5. integrated processing of large size formwork; S6. integrated finishing and bottom protection operation. The application constructs an integrated operation system of "demolition-transportation-unloading-bottom protection", strictly retains the unique demolition direction of "eight-side section to four-side section", the principle of layer-by-layer demolition, the transportation scheme of special transport vehicle+guide rail and the bottom protection principle of "the last bottom mold", and standardizes the connection process of each procedure.

Description

Technical Field

[0001] This invention relates to the field of wind tunnel construction technology, and in particular to an integrated method for dismantling and transporting the internal formwork support system of a wind tunnel diffusion section. Background Technology

[0002] With the rapid development of my country's aerospace, automotive, and other industries, the demand for ultra-large wind tunnels is increasing. The wind tunnel diffusion section, as a core component, often features an irregular structure that gradually transitions from an octagonal to a quadrilateral shape. Its unique internal space, high clearance, and large, heavy internal formwork support system make dismantling and transportation extremely difficult. Currently, existing formwork removal methods, such as those in patent application CN110274744A, have many drawbacks, particularly the lack of an integrated operation concept: First, the dismantling direction does not fully integrate with the gradual transition from octagonal to quadrilateral in the diffusion section, easily leading to structural stress imbalance and damage to the concrete inner wall; second, the dismantling and transportation processes are disconnected, lacking dedicated transportation equipment and connecting structures, resulting in low material handling efficiency and a high risk of collision with the flow channel bottom plate; third, the principle of "removing the bottom formwork last" is not strictly followed, leading to damage to the flow channel bottom plate; fourth, the poor compatibility between the transportation equipment and guide rails prevents seamless integration of dismantling, transportation, and unloading, resulting in a cumbersome construction process and significant safety hazards. Therefore, a method is urgently needed to effectively address the shortcomings of disconnected processes, low efficiency, and poor safety. Summary of the Invention

[0003] This invention aims to address the shortcomings of existing technologies by providing an integrated dismantling and relocation method for the internal formwork support system of a wind tunnel diffusion section. This method achieves safe, efficient, and orderly integrated dismantling and relocation operations, protecting the quality of the flow channel bottom plate and the inner concrete wall.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A method for the integrated dismantling and relocation of the internal formwork support system in a wind tunnel diffuser section includes the following steps:

[0006] S1. Integrated construction planning: The wind tunnel diffusion section internal formwork support system is divided into a construction section as a whole, the "eight-sided section to four-sided section" is identified as the core demolition direction, the bottom protection principle of "from top to bottom, layer by layer demolition, and finally demolition of the bottom formwork" is established, and the location of the operation platform, guide rail laying and temporary unloading platform is planned in sync to build an integrated operation process;

[0007] S2. Integrated Operation Preparation: Fully lay scaffold boards on the working surface of the steel structure support frame of the layer to be demolished to form an operation platform that integrates operation, temporary material storage, and transfer connection; simultaneously lay guide rails compatible with special transport vehicles between the operation platform and the pre-set temporary unloading platform at the corresponding height; fully hang safety nets at the bottom of the operation platform and the corresponding support of the next layer to form double safety protection.

[0008] S3. Layered integrated demolition: Following the demolition direction from the eight-sided section to the four-sided section, the inner formwork and corresponding steel supports are demolished layer by layer along the flow channel axis from top to bottom. The "demolition-transfer" operation is carried out simultaneously. First, the top formwork and corresponding steel supports of the operating platform layer are demolished, and then the side formwork, inclined plate formwork and corresponding steel supports are demolished. The process is carried out layer by layer. The bottom formwork is not demolished in advance. The principle of protecting the bottom is strictly implemented during the demolition process.

[0009] S4. Integrated transfer and unloading: Using pre-embedded connecting steel bars as lifting points, four lifting points are set at the corner of each template. The dismantled template and steel support are hoisted onto a special transport vehicle using a chain hoist. The special transport vehicle loaded with materials is then smoothly pushed to a temporary unloading platform via guide rails, completing the integrated connection of material transfer and unloading and avoiding secondary handling of materials.

[0010] S5. Large-size template integrated processing: When the size of the dismantled template is too large to be transported by the guide rail, it is cut into several small pieces of suitable size on the operating platform. The cut small template pieces are then transported by a special transport vehicle and guide rail.

[0011] S6. Integrated bottom protection and finishing operation: After all the upper formwork and steel supports have been removed and transported, the bottom formwork is removed in one go, and the flow channel is cleaned at the same time.

[0012] The special transport vehicle shown is a self-made transport vehicle with a body height of 300mm. The vehicle body is equipped with an anti-slip limiting structure, which is adapted to the size of the guide rail and matches the height of the operating platform and temporary unloading platform.

[0013] The guide rail is made of steel profiles, laid in a direction parallel to the axial direction of the wind tunnel channel, and fixed at the junction of the operating platform, the preset position of the wind tunnel channel, and the temporary unloading platform.

[0014] The specific steps for dismantling the inner formwork and corresponding steel supports layer by layer from top to bottom in step S3 are as follows: For each layer to be dismantled, the top formwork, upper inclined plate formwork and corresponding supports of that layer are dismantled in sequence, then the side formwork and corresponding steel supports of that layer are dismantled, and then the lower inclined plate formwork and corresponding steel supports of that layer are dismantled. After all the upper structures have been dismantled and transferred, the bottommost formwork is then dismantled.

[0015] The cutting described in step S5 is an gas cutting operation. Before cutting, flammable materials on the operating surface must be cleaned and fire prevention equipment must be provided. After cutting, the cut surface must be polished.

[0016] The wind tunnel diffusion section is a structure with a length ranging from 0 to 33.146m, which gradually changes from an octagonal section to a quadrilateral section.

[0017] The temporary unloading platform is located at the end of the guide rail and is used to receive and temporarily store the templates and steel supports unloaded from the special transport vehicle.

[0018] The beneficial effects of this invention are as follows: This invention constructs an integrated operation system of "dismantling-transferring-unloading-bottom protection", strictly retains the unique dismantling direction of "from eight-sided section to four-sided section", the principle of layer-by-layer dismantling, the transfer scheme of special transport vehicle + guide rail, and the principle of bottom protection of "final dismantling of bottom formwork", standardizes the connection process of each process, realizes the seamless connection of dismantling of inner formwork support system, material transfer, temporary unloading and flow channel protection, ensures construction safety and efficiency, prevents damage to flow channel bottom plate and concrete inner wall, and is suitable for construction scenarios of ultra-large wind tunnel diffusion section. Attached Figure Description

[0019] Figure 1 This is a schematic diagram illustrating the dismantling sequence of the template and steel support according to the present invention;

[0020] Figure 2 This is a schematic diagram of the welding of the hook of the present invention;

[0021] Figure 3 This is a schematic diagram of the large-size template cutting of the present invention;

[0022] Figure 4 This is a schematic diagram illustrating the dismantling and relocation of the top mold, upper inclined plate mold, and steel support of the present invention;

[0023] Figure 5 This is a schematic diagram illustrating the dismantling and relocation of the side mold and steel support of the present invention;

[0024] Figure 6 This is a schematic diagram illustrating the dismantling and relocation of the lower inclined plate mold and steel support of the present invention;

[0025] Figure 7 This is a schematic diagram illustrating the dismantling and relocation of the lower mold and steel support of the present invention;

[0026] Figure 8 This is a schematic diagram of the temporary unloading platform construction area according to the present invention;

[0027] Among them, 1-temporary unloading platform; 2-transport vehicle;

[0028] The following will describe in detail, with reference to the accompanying drawings, embodiments of the invention. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0030] A method for the integrated dismantling and relocation of the internal formwork support system in a wind tunnel diffuser section includes the following steps:

[0031] S1. Integrated Construction Planning:

[0032] Based on the length of the wind tunnel diffuser section from 0 to 33.146m and the gradual structural change from the octagonal to the quadrangular sections, the internal formwork support system is divided into a single construction section to avoid the confusion caused by segmented dismantling. The core dismantling direction is clearly defined as moving along the flow channel from the octagonal to the quadrangular sections, adapting to the stress characteristics of the irregular structure of the diffuser section. The principle of "dismantling from top to bottom, layer by layer, and finally removing the bottom formwork" is established to protect the flow channel bottom plate from the source. The layout of the operating platform, guide rails, and temporary unloading platform 1 are planned in a coordinated manner to ensure smooth connection between the three, constructing an integrated operation process of "dismantling-transfer-unloading-bottom protection" to avoid process disconnect.

[0033] S2. Integrated Operation Preparation

[0034] On the working surface of the steel structure support frame on the construction layer, scaffold boards are fully laid to form a multi-functional operating platform integrating construction operations, temporary material storage, and transfer connections. This eliminates the need for an additional transfer platform, simplifying the work process. Guide rails, made of fabricated steel, are laid simultaneously, with one end connecting to the operating platform and the other extending to the corresponding height of the temporary unloading platform 1. This ensures the guide rails are laid flat and firmly, precisely fitting the 300mm self-made transport vehicle 2, guaranteeing seamless transfer of dismantled materials. Simultaneously, safety netting is fully hung at the bottom of the operating platform and at the corresponding support level below, forming double safety protection to eliminate the risk of falls from height and falling materials, providing safety assurance for integrated operations.

[0035] S3. Layered Integrated Demolition

[0036] Following the demolition direction from the eight-sided section to the four-sided section, the demolition work is carried out layer by layer from top to bottom, implementing an integrated "demolition-transfer" mode to avoid the accumulation of demolished materials on the operating platform and improve work efficiency. The specific process is as follows: First, the top formwork and corresponding height steel support of the current layer are removed, and then immediately hoisted to the 300mm self-made transport vehicle 2 for transfer using a chain hoist; then the side formwork, inclined plate formwork and corresponding steel support of the current layer are removed, and the transfer operation is repeated; the process is carried out layer by layer, and the bottom formwork is not removed in advance throughout the process. The bottom protection principle is strictly implemented to prevent collisions and damage to the bottom plate of the flow channel during the demolition process.

[0037] S31. Sequentially dismantle the top formwork, upper inclined plate formwork, and steel support from 0 to 33.146m. Use a chain hoist to smoothly lift the dismantled formwork and steel support onto the 300mm self-made transport vehicle 2. After securing the materials firmly, push the transport vehicle 2 to travel smoothly along the guide rail and directly transfer it to the temporary unloading platform 1 at the corresponding height.

[0038] S32. Sequentially dismantle the side formwork and steel supports from 0 to 33.146m. Use a chain hoist to smoothly lift the dismantled formwork and steel supports onto a 300mm self-made transport vehicle 2. After securing the materials, push the transport vehicle 2 to travel smoothly along the guide rail and directly transfer them to the temporary unloading platform 1 at the corresponding height.

[0039] S33. Sequentially dismantle the inclined slab formwork and steel supports from 0 to 33.146m downhill. Use a chain hoist to smoothly lift the dismantled formwork and steel supports onto a 300mm self-made transport vehicle 2. After securing the materials, push the transport vehicle 2 to travel smoothly along the guide rail and directly transfer them to the temporary unloading platform 1 at the corresponding height.

[0040] S34. Sequentially dismantle the bottom formwork and steel supports from 0 to 33.146m. Use a chain hoist to smoothly lift the dismantled formwork and steel supports onto a 300mm self-made transport vehicle 2. After securing the materials, push the transport vehicle 2 to travel smoothly along the guide rail and directly transfer them to the temporary unloading platform 1 at the corresponding height.

[0041] S4. Integrated transfer and unloading

[0042] Using pre-embedded steel bars during concrete construction as load-bearing points, hooks are welded to their lower ends. Lifting points are set at the four corners of each formwork panel to ensure even force distribution and prevent tilting or falling during hoisting. A chain hoist is used to smoothly lift the dismantled formwork and steel supports onto a 300mm self-made transport vehicle 2. After securing the materials, the transport vehicle 2 is pushed smoothly along the guide rails, directly transferring the materials to the corresponding temporary unloading platform 1. This achieves seamless integration of dismantling, transportation, and unloading, eliminating the need for secondary material handling and significantly improving construction efficiency.

[0043] S5. Large-size template integrated processing

[0044] The dismantling of formwork should strictly adhere to the original design dimensions to ensure its integrity and facilitate subsequent reuse. When the dismantled steel formwork is too large (e.g., 3m x 2m) to be transported via guide rails, it is cut using gas cutting on the operating platform. Depending on the site access and guide rail dimensions, the large formwork is cut into 2 or 4 smaller pieces of suitable size. Before cutting, flammable debris (such as oil and sawdust) must be removed from the operating surface, and sufficient fire-fighting equipment must be provided. The cutting operation should be performed by professional gas cutting personnel. After cutting, cutting residue should be cleaned promptly, and the cut edges should be polished with an angle grinder to ensure a smooth, burr-free surface that does not affect the subsequent reuse of the formwork. The smaller formwork pieces are immediately transported via a 300mm self-made transport vehicle with 2+ guide rails, achieving integrated processing and transport of large-size formwork.

[0045] S6. Integrated bottom protection and finishing operation

[0046] After all the upper structures (top formwork, side formwork, inclined plate formwork, and corresponding steel supports) have been dismantled and transferred to temporary unloading platform 1, the bottommost unit steel formwork will be dismantled in a concentrated manner. This thoroughly implements the principle of "removing the bottom formwork last" to protect the bottom and prevent premature removal of the bottom formwork from impacting and damaging the flow channel bottom plate. After the bottom formwork is removed, cutting debris, construction waste, and other debris in the flow channel will be cleaned simultaneously to ensure the inner wall of the flow channel is clean. This completes the integrated dismantling and transfer of the entire inner formwork support system, laying the foundation for subsequent construction.

[0047] In the description of the invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of the invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In this invention, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] The invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution, or direct application to other situations without modification, are all within the scope of protection of the invention.

Claims

1. A method for the integrated dismantling and relocation of the internal formwork support system in a wind tunnel diffuser section, characterized in that, Includes the following steps: S1. Integrated construction planning: The wind tunnel diffusion section internal formwork support system is divided into a construction section as a whole, and the "eight-sided section to four-sided section" is clearly defined as the core demolition direction. The bottom protection principle of "from top to bottom, layer by layer demolition, and finally demolition of the bottom formwork" is established. The layout of the operation platform, guide rail laying and temporary unloading platform (1) is planned simultaneously to construct an integrated operation process. S2. Integrated Operation Preparation: Fully cover the working surface of the steel structure support frame of the layer to be demolished with scaffold boards to form an operation platform that integrates operation, temporary material storage, and transfer connection. Simultaneously, guide rails compatible with special transport vehicles (2) are laid between the operating platform and the pre-set temporary unloading platform (1) at the corresponding height; safety nets are fully hung at the bottom of the operating platform and the corresponding next layer support to form double safety protection; S3. Layered integrated demolition: Following the demolition direction from the eight-sided section to the four-sided section, the inner formwork and corresponding steel supports are demolished layer by layer along the flow channel axis from top to bottom. The "demolition-transfer" operation is carried out simultaneously. First, the top formwork and corresponding steel supports of the operating platform layer are demolished, and then the side formwork, inclined plate formwork and corresponding steel supports are demolished. The process is carried out layer by layer. The bottom formwork is not demolished in advance. The principle of protecting the bottom is strictly implemented during the demolition process. S4. Integrated transfer and unloading: Using the pre-embedded connecting steel bars as lifting points, four lifting points are set at the corner of each template. The dismantled template and steel support are hoisted onto the special transport vehicle (2) by a chain hoist. The special transport vehicle (2) loaded with materials is pushed smoothly to the temporary unloading platform (1) through the guide rail, thus completing the integrated connection of material transfer and unloading and avoiding secondary handling of materials. S5. Large-size template integrated processing: When the size of the dismantled template is too large to be transported by the guide rail, it is cut into several small pieces of suitable size on the operating platform. The cut small pieces of template are transported by a special transport vehicle (2) and the guide rail. S6. Integrated bottom protection and finishing operation: After all the upper formwork and steel supports have been removed and transported, the bottom formwork is removed in one go, and the flow channel is cleaned at the same time.

2. The integrated dismantling and relocation method for the internal formwork support system of a wind tunnel diffuser section according to claim 1, characterized in that, The special transport vehicle (2) shown is a self-made transport vehicle (2) with a body height of 300mm. The vehicle body is equipped with an anti-slip limiting structure, which is adapted to the size of the guide rail and matches the height of the operating platform and the temporary unloading platform (1).

3. The integrated dismantling and relocation method for the internal formwork support system of a wind tunnel diffuser section according to claim 2, characterized in that, The guide rail is made of steel profiles, and the laying direction is parallel to the axial direction of the wind tunnel channel. It is fixed at the junction of the operating platform, the preset position of the wind tunnel channel and the temporary unloading platform (1).

4. The integrated dismantling and relocation method for the internal formwork support system of a wind tunnel diffuser section according to claim 3, characterized in that, The specific steps for dismantling the inner formwork and corresponding steel supports layer by layer from top to bottom in step S3 are as follows: For each layer to be dismantled, the top formwork, upper inclined plate formwork and corresponding supports of that layer are dismantled in sequence, then the side formwork and corresponding steel supports of that layer are dismantled, and then the lower inclined plate formwork and corresponding steel supports of that layer are dismantled. After all the upper structures have been dismantled and transferred, the bottommost formwork is then dismantled.

5. The integrated dismantling and relocation method for the internal formwork support system of a wind tunnel diffuser section according to claim 4, characterized in that, The cutting described in step S5 is an oxy-fuel cutting operation. Before cutting, flammable materials on the operating surface must be cleaned and fire-fighting equipment must be provided. After cutting, the cut surface must be polished.

6. The integrated dismantling and relocation method for the internal formwork support system of a wind tunnel diffuser section according to claim 5, characterized in that, The wind tunnel diffusion section is a structure with a length ranging from 0 to 33.146m, which gradually changes from an octagonal section to a quadrilateral section.

7. The integrated dismantling and relocation method for the internal formwork support system of a wind tunnel diffuser section according to claim 6, characterized in that, The temporary unloading platform (1) is located at the end of the guide rail and is used to receive and temporarily store the templates and steel supports unloaded from the special transport vehicle (2).

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