Construction technology of special-shaped curved surface large-span truss structure

Abstract

The invention discloses a construction process of a special-shaped curved surface large-span truss structure, which comprises the following steps of: 1, arranging a construction plane, pre-planning a temporary component stacking and assembling site according to the requirements of site construction, and reducing secondary transportation in the site; the hoisting method has the beneficial effects that the assembled components are subjected to hoisting construction in a hoisting mode of combined construction of spare parts and assembly, so that the special-shaped curved surface large-span truss structure is not influenced by the assembly progress during construction, and multi-point-position construction can be carried out; due to the proper component size, the capacity of common transportation and hoisting machinery can be fully and efficiently exerted; meanwhile, the workload of the whole project is reasonably distributed to a processing plant and field installation, and respective advantages are fully exerted; in addition, welding of complex joints (welding of multi-pipe penetrating and multi-plate penetrating rod pieces and stiffening plates) is conducted in a factory with better machining conditions, and the engineering quality is better guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of special-shaped curved surface large-span trusses, and in particular to a construction process of a special-shaped curved surface large-span truss structure. Background Art

[0002] As a new type of building structure, the special-shaped curved large-span truss structure has the advantages of large span, light weight, and strong seismic resistance. It is widely used in large stadiums, convention and exhibition centers and other buildings.

[0003] At present, the general construction process of the construction technology of special-shaped curved surface large-span truss structure is as follows: design planning, material preparation, component processing and manufacturing, component assembly, on-site installation, welding and fixing, adjustment and inspection, surface protection treatment. Although the installation and construction of the special-shaped curved surface large-span truss structure can be realized under the above processing technology, under the above construction technology, the assembled components are hoisted mainly in two ways: high-altitude assembly of loose parts and overall hoisting of large-unit ground assembly. The high-altitude assembly method of loose parts will make the quality of some components during high-altitude welding unable to be guaranteed, and at the same time, the workload on the construction site is large and the overall construction quality is poor. The overall hoisting method of large-unit ground assembly occupies a large area and cannot be constructed in a small construction site. At the same time, the rigidity of the single-block assembly structure is poor, and it is easy to cause permanent damage to the structure during hoisting and transportation, which makes the final construction quality of the special-shaped curved surface large-span truss structure poor, which is not convenient for the efficient installation and construction of the special-shaped curved surface large-span truss structure. Summary of the invention

[0004] The purpose of the present invention is to provide a construction process for a special-shaped curved surface large-span truss structure in order to solve the above-mentioned problem.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions: A construction process for a special-shaped curved surface large-span truss structure, comprising the following steps: Step 1: Layout of the construction plane. Pre-plan the temporary stacking and assembly site of components according to the needs of on-site construction to reduce secondary transportation within the site; Step 2: Design and plan the construction materials. According to the on-site transportation roads and the lifting capacity of the tower crane, the special-shaped curved large-span trusses are divided into several parts. The high ones are divided into upper and lower chords and web members, and the others are divided into sections. The size of each component is strictly controlled; Step 3: Foundation construction: Process the foundation according to the design requirements to ensure that the prefabricated parts of the special-shaped curved large-span truss structure can be directly installed on the pre-processed foundation at the construction site after assembly; Step 4: Processing of construction materials: pre-cutting in the factory according to design requirements and processing into accessories of corresponding sizes; Step 5: Transportation and hoisting of construction materials: hoist the processed parts to the temporary storage area at the construction site, and classify and stack all kinds of components in a unified manner; Step 6: On-site assembly and installation: assemble the prefabricated parts transported to the temporary stacking and assembly site according to the design requirements to form the main trusses and secondary trusses of the special-shaped curved surface large-span trusses, and install the assembled main trusses and secondary trusses in sequence on the pre-processed foundation at the construction site of the special-shaped curved surface large-span truss structure with the help of a large sliding tire frame; Step 7: Welding and connection: welding and fixing the main truss, secondary truss and other accessories of the special-shaped curved surface long-span truss to ensure the stability of the special-shaped curved surface long-span truss structure after installation; Step 8: Surface protection, thoroughly clean the residual welding slag and other debris on the special-shaped curved surface large-span truss structure after welding and fixation, and spray a protective layer on the surface of the special-shaped curved surface large-span truss structure to complete the installation and construction of the special-shaped curved surface large-span truss structure.

[0006] Furthermore, the temporary stacking and assembly site selected in step 1 should be located near the construction site, and the temporary stacking site after arrangement should not only meet the construction and facilitate management, but also ensure the requirements of construction quality, safety, progress and environmental protection. Such a design can facilitate the rapid lifting of the assembled components to the construction site, ensuring the efficient construction process of the special-shaped curved large-span truss structure.

[0007] Furthermore, the temporary stacking and assembly site selected in step 1 should also have the characteristics of sunshade, ventilation purification and classified storage, which can ensure that the entire construction is not affected by the external weather and ensure the cleanliness of the environment at the temporary stacking and assembly site.

[0008] Furthermore, in the step 2, when designing and planning the construction materials, a process combining loose parts and sheets is mainly used for construction.

[0009] Furthermore, the process method adopted in step 2 ensures that the components of the special-shaped curved large-span truss structure are not affected by the assembly progress during prefabrication, and construction can be carried out at multiple locations.

[0010] Furthermore, the process method adopted in step 2 enables the workload of the entire project to be reasonably distributed to the processing plant and on-site installation during the prefabrication of the components of the special-shaped curved large-span truss structure, thereby giving full play to their respective advantages.

[0011] Furthermore, the foundation construction in step 3 includes aspects such as ground treatment, pile foundation and underground engineering, and after the foundation construction, it can be ensured that the prefabricated parts of the special-shaped curved large-span truss structure can be reliably installed and fixed at the foundation.

[0012] Furthermore, in step 4, when processing the prefabricated parts of the large-span truss structure with special-shaped curved surfaces, a CNC intersecting cutting machine is mainly used for cutting. At the same time, after cutting, the size and shape of each frame need to be compared for timely correction so that the structural dimensions of each prefabricated part can be guaranteed after processing.

[0013] Furthermore, in step 5, when stacking the prefabricated components, it is necessary to ensure that the stacking site is dry, and avoid excessive squeezing of the prefabricated components, so as to effectively ensure the storage quality of the prefabricated components when stacking.

[0014] Furthermore, in step 7, when welding and fixing the prefabricated parts, it is necessary to add detachable limit supports to the thinner welding parts of the structure, which can effectively prevent excessive deformation and damage of the thinner parts between the components during welding.

[0015] The beneficial effects of the present invention are: The present invention adopts a lifting method that combines scattered parts with assembly to lift and construct the assembled components, so that the large-span truss structure with special-shaped curved surfaces is not affected by the assembly progress during construction, and construction can be carried out at multiple locations; and the appropriate component size can fully and efficiently give play to the capabilities of commonly used transportation and lifting machinery; at the same time, the workload of the entire project is reasonably distributed to the processing plant and on-site installation, and their respective advantages are more fully exerted; in addition, the welding of complex nodes (welding of multi-tube intersections and multi-plate penetrating rods and stiffening plates) is carried out in a factory with better processing conditions, which better guarantees the quality of the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention provides a flow chart of the construction process of a special-shaped curved large-span truss structure. DETAILED DESCRIPTION

[0017] A construction process for a special-shaped curved surface large-span truss structure, comprising the following steps: Step 1: Arrangement of the quasi-construction plane, pre-planning of temporary component stacking and assembly sites according to the needs of on-site construction to reduce secondary transportation within the site; Step 2: Design and plan the construction materials. According to the on-site transportation roads and the lifting capacity of the tower crane, the special-shaped curved large-span trusses are divided into several parts. The high ones are divided into upper and lower chords and web members, and the others are divided into sections. The size of each component is strictly controlled; Step 3: Foundation construction: Process the foundation according to the design requirements to ensure that the prefabricated parts of the special-shaped curved large-span truss structure can be directly installed on the pre-processed foundation at the construction site after assembly; Step 4: Processing of construction materials: pre-cutting in the factory according to design requirements and processing into accessories of corresponding sizes; Step 5: Transportation and hoisting of construction materials: hoist the processed parts to the temporary storage area at the construction site, and classify and stack all kinds of components in a unified manner; Step 6: On-site assembly and installation: assemble the prefabricated parts transported to the temporary stacking and assembly site according to the design requirements to form the main trusses and secondary trusses of the special-shaped curved surface large-span trusses, and install the assembled main trusses and secondary trusses in sequence on the pre-processed foundation at the construction site of the special-shaped curved surface large-span truss structure with the help of a large sliding tire frame; Step 7: Welding and connection: welding and fixing the main truss, secondary truss and other accessories of the special-shaped curved surface long-span truss to ensure the stability of the special-shaped curved surface long-span truss structure after installation; Step 8: Surface protection, thoroughly clean the residual welding slag and other debris on the special-shaped curved surface large-span truss structure after welding and fixation, and spray a protective layer on the surface of the special-shaped curved surface large-span truss structure to complete the installation and construction of the special-shaped curved surface large-span truss structure.

[0018] In this embodiment, the temporary stacking and assembly site selected in step 1 should be located near the construction site, and the temporary stacking site after arrangement must not only meet the construction and facilitate management, but also ensure the requirements of construction quality, safety, progress and environmental protection. Such a design can facilitate the rapid lifting of the assembled components to the construction site, ensuring the efficient construction process of the special-shaped curved large-span truss structure.

[0019] In this embodiment, the temporary stacking and assembly site selected in step 1 should also have the characteristics of sunshade, ventilation purification and classified storage, which can ensure that the entire construction is not affected by the external weather and ensure the cleanliness of the environment at the temporary stacking and assembly site.

[0020] In this embodiment, in step 2, when designing and planning the construction materials, a process combining loose parts and sheets is mainly used for construction.

[0021] In this embodiment, the process method adopted in step 2 ensures that the components of the special-shaped curved large-span truss structure are not affected by the assembly progress during prefabrication, and construction can be carried out at multiple locations.

[0022] In this embodiment, the process method adopted in step 2 enables the workload of the entire project to be reasonably distributed to the processing plant and on-site installation during the prefabrication of the components of the special-shaped curved large-span truss structure, thereby giving full play to their respective advantages.

[0023] In this embodiment, the foundation construction in step 3 includes aspects such as foundation treatment, pile foundation and underground engineering, and after the foundation construction, it can be ensured that the prefabricated parts of the special-shaped curved large-span truss structure can be reliably installed and fixed at the foundation.

[0024] In this embodiment, in step 4, when processing the prefabricated parts of the large-span truss structure with special-shaped curved surfaces, a CNC intersecting cutting machine is mainly used for cutting. At the same time, after cutting, the size and shape of each frame need to be compared for timely correction so that the structural dimensions of each prefabricated part can be guaranteed after processing.

[0025] In this embodiment, when stacking the prefabricated components in step 5, it is necessary to ensure that the stacking site is dry and avoid excessive squeezing of the prefabricated components, so as to effectively ensure the storage quality of the prefabricated components when stacking.

[0026] In this embodiment, when welding and fixing each prefabricated component in step 7, it is necessary to add a detachable limit support to the thinner welding parts of the structure, which can effectively prevent excessive deformation and damage of the thinner parts between components during welding.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A construction process for a special-shaped curved large-span truss structure, characterized by: It includes the following steps: Step 1: Layout of the construction plane. Pre-plan the temporary stacking and assembly site of components according to the needs of on-site construction to reduce secondary transportation within the site; Step 2: Design and plan the construction materials. According to the on-site transportation roads and the lifting capacity of the tower crane, the special-shaped curved large-span trusses are divided into several parts. The high ones are divided into upper and lower chords and web members, and the others are divided into sections. The size of each component is strictly controlled; Step 3: Foundation construction: Process the foundation according to the design requirements to ensure that the prefabricated parts of the special-shaped curved large-span truss structure can be directly installed on the pre-processed foundation at the construction site after assembly; Step 4: Processing of construction materials: pre-cutting in the factory according to design requirements and processing into accessories of corresponding sizes; Step 5: Transportation and hoisting of construction materials: hoist the processed parts to the temporary storage area at the construction site, and classify and stack all kinds of components in a unified manner; Step 6: On-site assembly and installation: assemble the prefabricated parts transported to the temporary stacking and assembly site according to the design requirements to form the main trusses and secondary trusses of the special-shaped curved surface large-span trusses, and install the assembled main trusses and secondary trusses in sequence on the pre-processed foundation at the construction site of the special-shaped curved surface large-span truss structure with the help of a large sliding tire frame; Step 7: Welding and connection: welding and fixing the main truss, secondary truss and other accessories of the special-shaped curved surface long-span truss to ensure the stability of the special-shaped curved surface long-span truss structure after installation; Step 8: Surface protection, thoroughly clean the residual welding slag and other debris on the special-shaped curved surface large-span truss structure after welding and fixation, and spray a protective layer on the surface of the special-shaped curved surface large-span truss structure to complete the installation and construction of the special-shaped curved surface large-span truss structure.

2. The construction process of a special-shaped curved surface large-span truss structure according to claim 1, characterized in that: The temporary stacking and assembly site selected in step 1 should be located near the construction site, and the temporary stacking site after arrangement should not only meet the construction and facilitate management, but also ensure the requirements of construction quality, safety, progress and environmental protection.

3. The construction process of a special-shaped curved surface large-span truss structure according to claim 1, characterized in that: The temporary stacking and assembly site selected in step 1 should also have the characteristics of sunshade, ventilation purification and classified storage.

4. The construction process of a special-shaped curved surface large-span truss structure according to claim 1, characterized in that: In the step 2, when designing and planning the construction materials, a process combining loose parts and sheets is mainly used for construction.

5. The construction process of a special-shaped curved surface large-span truss structure according to claim 4 is characterized by: The process method adopted in step 2 ensures that the components of the large-span truss structure with special-shaped curved surfaces are not affected by the assembly progress during prefabrication, and construction can be carried out at multiple locations.

6. The construction process of a special-shaped curved surface large-span truss structure according to claim 4, characterized in that: The process method adopted in step 2 enables the workload of the entire project to be reasonably distributed to the processing plant and on-site installation during the prefabrication of the components of the special-shaped curved large-span truss structure, thereby giving full play to their respective advantages.

7. The construction process of a special-shaped curved surface large-span truss structure according to claim 4 is characterized by: The foundation construction in step 3 includes aspects such as foundation treatment, pile foundation and underground engineering, and after the foundation construction, it can be ensured that the prefabricated parts of the special-shaped curved surface large-span truss structure can be reliably installed and fixed at the foundation.

8. The construction process of a special-shaped curved surface large-span truss structure according to claim 1, characterized in that: In step 4, when processing the prefabricated parts of the special-shaped curved large-span truss structure, a CNC intersecting cutting machine is mainly used for cutting. At the same time, after cutting, the size and shape of each frame need to be compared for timely correction.

9. The construction process of a special-shaped curved surface large-span truss structure according to claim 1, characterized in that: In step 5, when stacking the prefabricated components, it is necessary to ensure that the stacking site is dry and avoid excessive squeezing of the prefabricated components.

10. The construction process of a special-shaped curved surface large-span truss structure according to claim 1, characterized in that: In step 7, when the prefabricated parts are welded and fixed, it is necessary to add a detachable limiting support to the welding parts which are relatively thin in structure.

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