Installation method of super-large polygonal curved steel structure

Abstract

This invention provides a method for installing an ultra-large polygonal curved steel structure, belonging to the field of steel structure installation technology. The installation method includes: drawing a site plan and track diagram according to design drawings at the installation site; installing the track and base; installing the lower truss assembly on the base; installing the lower shell onto the lower truss assembly; assembling the upper shell; installing the upper truss assembly and attaching the upper shell to the upper truss assembly; and assembling to form the polygonal curved steel structure. This invention, by dividing the ultra-large polygonal curved steel structure component into upper and lower parts, assembling them separately on the ground, and then joining the upper and lower parts together through overall lifting and sliding, completes the on-site installation. This significantly reduces the costs of high-altitude operations and measures, improves the efficiency of on-site fabrication and installation, saves construction time, and reduces the lifting height requirements of hoisting machinery, enabling the fabrication and installation of ultra-large polygonal curved steel structure components in height-restricted spaces.

Description

Technical Field

[0001] This invention relates to the field of steel structure installation technology, and in particular to a method for installing ultra-large polygonal curved steel structures. Background Technology

[0002] A certain type of large, non-standard steel structure component has external dimensions (length, width, and height) all exceeding 30m, a maximum directional dimension exceeding 50m, a total weight exceeding 1300 tons, and a structural form of a hollow polygonal curved surface. For example... Figure 1 As shown: The super-large polygonal curved steel structure consists of truss components, shell, and base; the shell is a polygonal thin-walled hollow curved surface structure with a "trumpet" shape. The cross-section of the shell gradually transitions from a quadrilateral at the entrance to an octagon at the exit along the axial direction, and the cross-sectional size continuously decreases; the truss components are arranged around the outer contour of the shell, and their shape is similar to that of the shell, which is used to increase the overall rigidity of the steel structure components; the base is located at the lower part of the truss components to support the steel structure components.

[0003] In related technologies, due to the large size of these steel structure components, they need to be fabricated and installed on-site. The conventional approach is as follows: install a base on the foundation, install the bottom and elevation truss components on the base in sections, then install the bottom and elevation shells on the truss components, then erect full-span scaffolding on the shells, lay the top shell on the scaffolding, then install the top truss components in sections, and finally install and adjust the top shell.

[0004] However, the above method involves bottom-up installation, which takes a long time and indirectly increases construction costs and poses risks to the construction period. At the same time, it involves a large amount of work at height, which poses high safety risks and incurs high costs for high-altitude measures. If there are restrictions on height during construction, the top truss components can only be assembled piecemeal at height, which further increases the risks to the construction period, safety, and cost. Summary of the Invention

[0005] This invention provides an installation method for ultra-large polygonal curved steel structures, which overcomes the shortcomings of existing installation methods and achieves more efficient installation.

[0006] This invention provides a method for installing an ultra-large polygonal curved steel structure, comprising: drawing a site plan and track plan on the installation site according to design drawings; installing the track and base; installing a lower support assembly around the base; installing a lower truss assembly in sections on the base and the lower support assembly; adjusting the lower truss assembly to coincide with the site plan; and completing the welding of the lower truss assembly; installing a lower shell in sections on the lower truss assembly; and completing the welding of the lower shell; after laying supporting scaffolding on the site plan of the upper truss assembly, ... Supporting components are installed on both sides of the supporting scaffold, and the upper shell is assembled in sections on the supporting scaffold. The upper truss assembly is installed in sections on the upper supporting components and the upper shell, and the upper truss assembly is adjusted to coincide with the ground sample to complete the welding of the upper truss assembly. The positional accuracy of the upper shell is adjusted in sections and installed on the upper truss assembly to complete the welding of the upper shell. The lower truss assembly is joined with the upper truss assembly and the lower shell is joined with the upper shell through the track to form a polygonal curved steel structure.

[0007] According to the installation method of the ultra-large polygonal curved steel structure provided by the present invention, the bottom end face of the upper shell is parallel to the top end face of the lower shell, and the lower shell is 2000~3000mm larger than the upper shell in the height direction.

[0008] According to the installation method of the ultra-large polygonal curved steel structure provided by the present invention, the upper shell and the lower shell are divided into multiple segments for fabrication, and the upper truss assembly and the lower truss assembly are divided into multiple segments for fabrication.

[0009] According to the installation method of the super-large polygonal curved steel structure provided by the present invention, a ground pattern and track pattern are drawn on the installation site according to the design drawings. The installation of the track and base includes: drawing a ground pattern of the lower truss assembly, the base and the track on the installation site; extending the ground pattern of the lower truss assembly along the exit direction to form the ground pattern of the upper truss assembly; laying the track along the ground pattern; and installing the base on the track.

[0010] According to the installation method of the ultra-large polygonal curved steel structure provided by the present invention, before the installation of the upper truss assembly, multiple jacks are arranged on the upper shell. After the upper truss assembly is installed, the camber is adjusted by multiple jacks. After the upper truss assembly is welded, the lifting height of multiple jacks is reduced to complete the unloading of the upper truss assembly. At the same time as the upper truss assembly is unloaded, the connection between the upper truss assembly and the upper shell is completed.

[0011] According to the installation method of the ultra-large polygonal curved steel structure provided by the present invention, the method of assembling the lower truss assembly, the upper truss assembly, and the lower shell and the upper shell to form a polygonal curved steel structure via the track includes: arranging lifting devices on both sides of the upper truss assembly to lift the upper structure as a whole; arranging hydraulic push rods between the track and the base to slide the lower structure as a whole directly below the upper structure; lowering the upper structure until the upper shell contacts the lower shell; installing connecting rods and welding the connecting rods to the upper truss assembly and the lower truss assembly; and welding the upper shell to the lower shell.

[0012] According to the installation method of the ultra-large polygonal curved steel structure provided by the present invention, after the upper shell and the lower shell are welded together, the ultra-large polygonal curved steel structure is transported to the installation site for placement by arranging an air cushion transport vehicle under the base.

[0013] According to the installation method of the ultra-large polygonal curved steel structure provided by the present invention, the truss assembly is divided into an upper truss assembly, a lower truss assembly, and connecting members; the connecting members are member connection structures, the bottom of the upper truss assembly includes welded ball joints, and the top of the lower truss assembly includes welded ball joints; the height dimension of the lower truss assembly is approximately half the height dimension of the truss assembly.

[0014] The present invention provides a method for installing ultra-large polygonal curved steel structures. This method involves dividing the ultra-large polygonal curved steel structure component into upper and lower parts, assembling them separately on the ground, and then merging the two parts together through overall lifting and sliding to complete the on-site installation. This significantly reduces the costs associated with high-altitude operations and measures. The simultaneous assembly of the upper and lower parts greatly improves the efficiency of on-site fabrication and installation, saving construction time. It also reduces the lifting height requirements for hoisting machinery, avoiding the use of large hoisting equipment. Furthermore, it enables the fabrication and installation of ultra-large polygonal curved steel structure components in height-restricted spaces, avoiding the use of high-altitude, piecemeal assembly methods for truss components. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a structural schematic diagram of the ultra-large polygonal curved steel structure provided by the present invention;

[0017] Figure 2 This is a flowchart illustrating the installation method for ultra-large polygonal curved steel structures provided by the present invention.

[0018] Figure 3 This is a schematic diagram of the truss structure provided by the present invention;

[0019] Figure 4 This is a schematic diagram of step 2 provided by the present invention;

[0020] Figure 5 This is a schematic diagram of step 3 provided by the present invention;

[0021] Figure 6 This is a schematic diagram of step 4 provided by the present invention;

[0022] Figure 7 This is a schematic diagram of step 5 provided by the present invention;

[0023] Figure 8 This is a schematic diagram of step 6 provided by the present invention;

[0024] Figure 9 This is one of the schematic diagrams of step 7 provided by the present invention;

[0025] Figure 10 This is a second schematic diagram of step 7 provided by the present invention;

[0026] Figure 11 This is the third schematic diagram of step 7 provided by the present invention.

[0027] Figure label:

[0028] 1. Extra-large polygonal curved steel structure;

[0029] 2. Truss assembly;

[0030] 3. Shell;

[0031] 100. Site map;

[0032] 200. Track;

[0033] 300. Base;

[0034] 400. Substructure;

[0035] 410. Lower truss assembly; 420. Support assembly; 430. Lower shell;

[0036] 500. Superstructure;

[0037] 510. Upper shell; 520. Upper truss assembly; 530. Supporting scaffold;

[0038] 600. Lifting device. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0040] In the description of this invention, it should be understood that 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 indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0041] In the description of this invention, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" indicate the orientation or positional relationship, which is generally based on Figure 1 The orientation and position of the super-large polygonal curved steel structure shown are for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of the present invention. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0042] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0043] This invention provides an ultra-large polygonal curved steel structure, see [link / reference]. Figure 1 The external dimensions (length, width, and height) are all on the order of 30m or more, the maximum directional dimension is on the order of 50m or more, and the total weight is over 1300 tons. The structural form is a hollow polygonal curved surface. The super-large polygonal curved surface steel structure 1 consists of truss components 2, shell 3, and base 300. Shell 3 is a polygonal thin-walled hollow curved surface structure with a "trumpet" shape. The cross-section of shell 3 gradually transitions from a quadrilateral at the entrance to an octagon at the exit along the axial direction, and the cross-sectional dimensions continuously decrease. Truss components 2 are set around the outer contour of shell 3 and have a similar shape to shell 3. They are used to increase the overall rigidity of the steel structure components. The base 300 is set at the lower part of truss components 2 to support the steel structure components.

[0044] This invention provides a method for installing an ultra-large polygonal curved steel structure, see [link / reference]. Figure 2 The installation method includes the following steps:

[0045] Step 1: According to the design drawings, draw a site map 100 and a track map (not shown in the figure) at the installation site, and install the track and base.

[0046] Draw a ground pattern 100 on the installation site for the lower truss assembly 410, base 300, and track 200. Extend the ground pattern of the lower truss assembly 410 along the exit direction to form the ground pattern of the upper truss assembly 520.

[0047] See Figure 4 Install the track 200 and the base 300. Lay the track 200 along the map, install the base 300 on the track 200, and adjust the relative positions of the bases 300 until they are in good condition.

[0048] For example, each base 300 corresponds to two guide rails.

[0049] Step 2: See Figure 5 Install the lower support assembly 420 around the base 300, install the lower truss assembly 410 in sections on the base 300 and the lower support assembly 420, adjust the lower truss assembly 410 to coincide with the ground sample 100, and complete the welding of the lower truss assembly 410.

[0050] Ensure that the lower truss assembly 410 coincides with its ground sample, and complete the welding of the lower truss assembly 410.

[0051] For example, a jack is provided between the lower support assembly 420 and the lower truss assembly 410 to adjust the position of the lower truss assembly 410.

[0052] Step 3: See Figure 6 The lower housing 430 is installed in sections onto the lower truss assembly 410, completing the welding of the lower housing 430. After adjusting the position of the lower housing 430 and completing the welding of the lower housing 430, the lower support assembly 420 is removed, thus completing the assembly of the lower structure 400.

[0053] Step 4: See Figure 7 After laying the supporting scaffolding 530 on the ground of the upper truss assembly 520 to support the upper shell 510, support assemblies 420 are installed on both sides of the supporting scaffolding 530 to support the upper truss assembly 520. The upper shell 510 is then assembled in sections on the supporting scaffolding 530.

[0054] For example, multiple jacks are provided on the upper housing 510.

[0055] Step 5: Install the upper truss assembly 520 in sections onto the upper support assembly 420 and the upper shell 510, adjust the upper truss assembly 520 to align with the ground plan, and complete the welding of the upper truss assembly 520. Install the upper truss assembly 520 and install the upper shell 510 onto the upper truss assembly 520; use the supporting scaffold 530 to adjust the position of the upper shell 510 and install it onto the upper truss assembly 520, completing the welding of the upper shell 510, thus completing the assembly of the upper structure 500.

[0056] For example, a total station is used to measure the camber of the upper truss assembly 520, and multiple jacks between the upper shell 510 and the upper truss assembly 520 are used to adjust the camber of the upper truss assembly 520. After passing the test, the welding of the upper truss assembly 520 is completed.

[0057] For example, the upper truss assembly 520 is unloaded by lowering the lifting height of multiple jacks, and the connection between the upper truss assembly 520 and the upper shell 510 is completed at the same time as the upper truss assembly 520 is unloaded.

[0058] Step 6: Adjust the positional accuracy of the upper shell 510 in sections and install it on the upper truss assembly 520 to complete the welding of the upper shell 510.

[0059] Step 7: See Figures 9-11 The lower truss assembly 410 and the upper truss assembly 520, as well as the lower shell 430 and the upper shell 510, are assembled together via the track 200 to form a polygonal curved steel structure.

[0060] Lifting devices 600 are arranged on both sides of the upper truss assembly 520 to lift the upper structure 500 as a whole; hydraulic push rods (not shown in the figure) are arranged between the track 200 and the base 300 to slide the lower structure 400 as a whole directly below the upper structure 500; the upper structure 500 is lowered until the upper shell 510 contacts the lower shell 430; the relative positions of the upper structure 500 and the lower structure 400 are adjusted to ensure that the bottom end face of the upper shell 510 is aligned with the top end face of the lower shell 430, connecting rods are installed, and the connecting rods (not shown in the figure) are welded to the upper truss assembly 520 and the lower truss assembly 410; the welding of the upper shell 510 and the lower shell 430 is completed.

[0061] For example, the number of lifting devices 600 is 4-8, and the present invention does not limit this. For instance, in this embodiment, three lifting devices 600 are arranged on each side of the upper truss assembly 520. The lifting devices 600 are symmetrically arranged along both sides of the upper truss structure to lift the upper structure 500 as a whole, thereby removing the supporting scaffolding 530 and the upper support assembly 420.

[0062] In this embodiment, the bottom of the upper truss assembly 520 includes a welded ball joint (not shown in the figure), the top of the lower truss assembly 410 includes a welded ball joint (not shown in the figure), and the connecting members are rod connection structures.

[0063] For example, the lifting point (not shown in the figure) is set on the welded ball joint of the upper truss assembly 520. Finite element analysis is performed on the structural part of the lifting device 600 and the lifting point to ensure the stability and safety of the lifting device 600 and the stiffness of the lifting point.

[0064] In this embodiment, the shell is divided into an upper shell 510 and a lower shell 430. The bottom end face of the upper shell 510 is parallel to the top end face of the lower shell 430. The lower shell 430 is 2000-3000mm larger than the upper shell 510 in the height direction. The upper shell 510 and the lower shell 430 are manufactured in multiple segments, and the upper truss assembly 520 and the lower truss assembly 410 are also manufactured in multiple segments.

[0065] In this embodiment, the truss assembly is divided into an upper truss assembly 520, a lower truss assembly 410, and connecting members. The connecting members are member connection structures and do not include welded ball joints. The height of the lower truss assembly 410 is approximately half the height of the truss assembly.

[0066] In this embodiment, the base 300 is manufactured as a whole, the upper shell 510 and the lower shell 430 are manufactured in multiple segments, and the upper truss assembly 520 and the lower truss assembly 410 are manufactured in multiple segments.

[0067] In this embodiment, before the base 300 is installed, a ground pattern of the lower truss assembly 410, the base 300, and the track 200 assembly is drawn on the installation site. The ground pattern of the lower truss assembly 410 is extended along the sliding axis to form the ground pattern of the upper truss assembly 520.

[0068] In this embodiment, before the upper truss assembly 520 is installed, multiple jacks are arranged on the upper shell 510. After the upper truss assembly 520 is installed, the camber is adjusted by the multiple jacks. After the upper truss assembly 520 is welded, the lifting height of the multiple jacks is reduced to complete the unloading of the upper truss assembly 520. At the same time as the upper truss assembly 520 is unloaded, the connection between the upper truss assembly 520 and the upper shell 510 is completed.

[0069] In this embodiment, after the upper shell 510 and the lower shell 430 are welded together, the ultra-large polygonal curved steel structure is transported to the installation location and placed by an air cushion transport vehicle arranged under the base 300.

[0070] The beneficial effects of the present invention are as follows: (1) The present invention divides the super-large polygonal curved steel structure component into upper and lower parts, assembles them separately on the ground, and then assembles the upper and lower parts together by lifting and sliding them as a whole to complete the on-site installation, which greatly reduces the cost of high-altitude operations and high-altitude measures; the synchronous assembly of the upper and lower parts greatly improves the efficiency of on-site fabrication and installation and saves the construction period; it reduces the lifting height requirements of the lifting machinery and avoids the use of large lifting machinery; it can realize the fabrication and installation of super-large polygonal curved steel structure components in height-restricted spaces and avoids the use of high-altitude bulk assembly method to install truss components. (2) The present invention reduces the height and weight of the upper structure 500 by reasonably dividing the super-large polygonal curved steel structure component into sections, reduces the workload of the upper structure 500 inverted construction, and reduces the construction difficulty; by dividing the truss component into three parts, and finally installing the connecting rods and then adjusting and welding the shell, the assembly accuracy of the super-large polygonal curved steel structure component can be effectively guaranteed and the construction quality can be guaranteed.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method of installing an ultra-large polygonal curved steel structure, characterized by, Comprising: According to the design drawing, draw the ground layout and track layout on the installation site, install the track and base; Install the lower support assembly around the base, install the lower truss assembly in sections on the base and the lower support assembly, adjust the lower truss assembly to coincide with the ground layout, and complete the welding of the lower truss assembly; Install the lower shell in sections on the lower truss assembly, and complete the welding of the lower shell; After laying the support scaffold on the ground layout of the upper truss assembly, install the upper support assembly on both sides of the support scaffold, and assemble the upper shell in sections on the support scaffold; Install the upper truss assembly in sections on the upper support assembly and the upper shell, adjust the upper truss assembly to coincide with the ground layout, and complete the welding of the upper truss assembly; Adjust the position accuracy of the upper shell in sections and install it on the upper truss assembly, and complete the welding of the upper shell; Through the track, the lower truss assembly and the upper truss assembly, and the lower shell and the upper shell are assembled to form a polygonal curved surface steel structure.

2. The method of installing a very large polygonal curved steel structure of claim 1, wherein, The bottom end surface of the upper shell is parallel to the top end surface of the lower shell, and the height of the lower shell is 2000-3000mm larger than that of the upper shell.

3. The method of installing a very large polygonal curved steel structure of claim 1, wherein, The upper shell and the lower shell are divided into multiple sections for production, and the upper truss assembly and the lower truss assembly are divided into multiple sections for production.

4. The method of installing a very large polygonal curved steel structure of claim 1, wherein, According to the design drawing, draw the ground layout and track layout on the installation site, install the track and base including: draw the ground layout of the lower truss assembly, the base, and the track on the installation site; The ground layout of the lower truss assembly is extended in the outlet direction to form the ground layout of the upper truss assembly; the track is laid along the ground layout; and the base is installed on the track.

5. The method of installing a very large polygonal curved steel structure of claim 1, wherein, Before installing the upper truss assembly, a plurality of jacks are arranged on the upper shell; after installing the upper truss assembly, the arching amount is adjusted by the plurality of jacks; after welding the upper truss assembly, the lifting height of the plurality of jacks is lowered to complete the unloading of the upper truss assembly; at the same time of unloading the upper truss assembly, the connection between the upper truss assembly and the upper shell is completed.

6. The method of installing a very large polygonal curved steel structure of claim 1, wherein, Through the track, the lower truss assembly and the upper truss assembly, and the lower shell and the upper shell are assembled to form a polygonal curved surface steel structure including: Arrange lifting devices on both sides of the upper truss assembly to lift the upper structure as a whole; Arrange hydraulic push rods between the track and the base to slide the lower structure as a whole to the lower side of the upper structure; Lower the upper structure until the upper shell contacts the lower shell; Install the connecting rod, and complete the welding of the connecting rod, the upper truss assembly, and the lower truss assembly; Complete the welding of the upper shell and the lower shell.

7. The method of installing a very large polygonal curved steel structure of claim 1, wherein, After the welding of the upper shell and the lower shell is completed, the super-large polygonal curved surface steel structure is transported to the installation site for positioning by arranging an air cushion transport vehicle under the base.

8. The method of installing a very large polygonal curved steel structure of claim 1, wherein, The truss assembly is divided into an upper truss assembly, a lower truss assembly, and a connecting rod; The connecting rod is a rod connecting structure, the bottom of the upper truss assembly includes a welded ball node, and the top of the lower truss assembly includes a welded ball node; The lower truss assembly has a height dimension that is about half the height dimension of the truss assembly.

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