Modular assembling method for dome structure

Abstract

The invention discloses a modular assembling method for a dome structure. The modular assembling method comprises the following steps that firstly, an assembling site is prepared; secondly, an assembling table is manufactured, the assembling table is composed of transverse beams, longitudinal beams, supporting columns, inclined struts and brackets, and the manufacturing method comprises the following steps that (1) the two longitudinal beams are laid on a leveled assembling site according to the distance between the two adjacent main beams of the dome structure; according to the method, the dome structure is constructed in a modular mode by adopting the process that the assembling table is assembled on the horizontal ground, the chord height, the radius and other sizes of the dome arc-shaped structure can be effectively controlled, the welding shrinkage deformation allowance is reserved in advance according to the characteristic that the welding work amount is large, the quality of the dome structure can be effectively controlled, and the welding quality of the dome structure is effectively improved. Through the modular assembly mode of the dome structure, the dome structure can be integrally installed, the conventional high-altitude one-by-one and single-piece installation mode is changed, the installation precision is improved, the cost input is reduced, the construction period is shortened, and the economic benefits are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of on-site production, in particular to a modular assembly method for a dome structure. BACKGROUND

[0002] The dome structure is commonly used for cylindrical arc-shaped top structure buildings such as gas tanks and oil storage tanks, and is commonly used in the metallurgical, oil, and natural gas industries to play a role in pressure stabilization, energy saving, and environmental protection. The structure has a stable structure form and can effectively disperse the weight of the top to the surrounding walls or pillars, which can reduce the use of materials and create a spacious and bright internal space, so it has been widely used in the gas and liquid storage industry.

[0003] In the past, the dome structure was installed and welded separately by high-altitude longitudinal frames, transverse frames, secondary frames, and dome plates. Since the dome plate is thin and the overall structure has a large amount of welding, the longitudinal overall shrinkage of the dome structure is large after welding, which causes the radius size of the lower barrel structure to be small, affecting the stability of the tank structure and the storage capacity. Therefore, during the construction of the dome structure, the radius size of the dome structure cannot be effectively controlled.

[0004] In addition, according to the conventional construction method, when installing the longitudinal frame, the space installation size is difficult to control due to the limited measurement of high-altitude work, resulting in a large deviation in the transverse and longitudinal dimensions. For the super part, a second adjustment is needed when installing the transverse frame. This installation method requires a second adjustment of the longitudinal frame and the transverse frame, making it difficult to control the size deviation, increasing the construction period and construction cost, and requiring the longitudinal frame, transverse frame, secondary frame, and dome plate to be installed and welded one by one at high altitude, which increases the welding difficulty and the risk of high-altitude work. Therefore, we propose a modular assembly method for a dome structure. SUMMARY

[0005] The purpose of the present application is to provide a modular assembly method for a dome structure to solve the problems raised in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a modular assembly method for a dome structure, comprising the following steps: Step 1: preparation of the assembly site; Step 2: production of the assembly platform, which is composed of transverse beams, longitudinal beams, support columns, diagonal braces, and brackets. The production steps are as follows: 1) Two longitudinal beams are laid according to the distance between the two adjacent main beams of the dome structure on the flat assembly site; 2) Measure and adjust the flatness of the longitudinal beams with a level, install the transverse beams between the two longitudinal beams according to the node spacing of the longitudinal framework of the dome structure, and recheck the flatness of the assembly platform after installation; 3) According to the position of the connection point of the longitudinal framework and the transverse framework of the dome structure, set up a corresponding number of support columns, the height of the support column is based on the chord height of the longitudinal framework, and is set up in the order of high in the middle and low on both sides. The height of the support column is between 600-1700mm, after the adjustment and fixation of the support column is completed, the diagonal bracing is installed on the side of the support column, which is used to reinforce the support column and also increases the overall strength of the assembly platform, facilitating the ground construction work; 4) Install the bracket outside the support column within a range of 180mm from the top, measure and adjust the height of the upper surface of the bracket with a level according to the chord height of the longitudinal framework of the dome structure, so that the upper surface of the bracket and the lower surface of the longitudinal framework can fit according to the curvature of the drawing, and then fix it after adjustment; Step three, assemble the dome structure module at the production site, the dome structure module is divided into two types: with longitudinal framework module and without longitudinal framework module, which can be welded into the main body of the dome structure by arranging them at intervals; 1) The assembly steps of the longitudinal framework module are as follows: First step: According to the radius and chord height of the dome structure, the longitudinal framework of the dome structure is made, and the length of the two ends of the longitudinal framework of the dome structure is reserved by 200mm during production; Second step: After the two longitudinal frameworks are completed, they are placed on the bracket of the assembly platform, and after the size is adjusted, they are fixed on the assembly platform, and then the transverse framework and the secondary framework are installed in turn, and after the installation is completed, the overall size is checked, and after the size is correct, welding and reinforcement are carried out; Third step: After the longitudinal framework and the transverse framework of the dome structure are installed and welded, the dome plate is laid in turn, the dome plate at both ends of the module is not laid, and both ends are reserved for module installation and construction work. Before the dome plate is fixed, check and adjust the radius, chord height, chord length and both end size of the longitudinal framework of the dome structure, and after the size detection and adjustment are completed, weld and fix the dome plate, and after the fixing is completed, move the module to the next assembly platform for welding work. This platform carries out the next module assembly work, and the welding is carried out in the order of transverse first and then longitudinal; 2) The assembly steps of the module without longitudinal framework are as follows: First step: When the last set of longitudinal framework module is assembled, the module without longitudinal framework is started to be assembled, and when the last set of longitudinal framework module is assembled, the longitudinal framework and the transverse framework are connected only by bolts, not by welding. After the installation of the transverse framework is completed, the secondary framework is installed, and after the installation of the secondary framework is completed, the overall size is checked, and after the size is correct, welding and reinforcement are carried out; Second step: after the transverse framework and the secondary framework of the dome structure are welded and reinforced, the dome plates are laid in sequence, the dome plates at both ends of the module are not laid, and the positions at both ends are reserved for installation of the dome structure module, facilitating installation and construction work. Before the dome plates are fixed, the radius, chord height, chord length and both end dimensions of the longitudinal framework of the dome structure are checked and adjusted, after the size detection and adjustment are completed, the dome plates are welded and fixed, and the longitudinal framework and the dome plate connection are not welded. After all other parts are completely welded, the connecting bolts of the dome plate, the transverse framework and the longitudinal framework are removed. At this time, the transverse framework, the secondary framework and the dome plate form an integral module, that is, a module without longitudinal framework. At this time, the dome structure module can be lifted and transferred, and the next module assembly work is continued by using the original two longitudinal frameworks. Third step, before installation, the size of the assembled and welded dome structure module is checked and adjusted. The chord length of the longitudinal framework of the dome structure module is checked, the actual installation size is measured, and the excess part of the longitudinal framework of the module with longitudinal framework is cut off according to the actual installation size. The cutting size is accurate according to the on-site measurement, the corresponding transverse framework positions are ensured to be the same after cutting, and the dome structure module size checking and adjustment is completed, and the preparation work before installation can be carried out.

[0007] Preferably, the production site should meet the operation space required for assembly of at least two dome structure modules, and the site should be hardened to ensure the stability of the assembly table.

[0008] Preferably, the height of the support column is controlled to be 600-1700mm, which is convenient for personnel to install and weld on the ground, reduces the amount of high-altitude work, and after the installation of the support column is completed, the diagonal brace is installed to strengthen the stability and overall strength of the support column, and improve the overall deformation resistance of the assembly table.

[0009] Preferably, the longitudinal framework has a total size of 200mm excess at both ends when it is cut and made, which is used as a welding shrinkage size allowance. After the final assembly and welding are completed, the size is checked again before the dome module is installed, and the excess part of the longitudinal framework at both ends is cut off.

[0010] Preferably, after the longitudinal beam and the transverse beam are connected and fixed, the levelness of the longitudinal beam and the transverse beam is re-measured by using a level instrument to ensure that the entire jig frame remains on the same horizontal plane, and a support column is arranged at the intersection of the longitudinal beam and the transverse beam.

[0011] Preferably, the longitudinal framework is placed on the bracket of the assembly table, and after the size of the longitudinal framework is determined to be correct, the fixing is completed. Then, according to the drawing, the transverse framework of the dome structure is installed, and after the fixing is completed, the remaining parts are installed in sequence, the connection and welding of the longitudinal framework and the transverse framework of the dome structure are completed, and finally the other secondary frameworks of the dome structure are installed and welded.

[0012] Preferably, when the longitudinal skeleton module is assembled, the longitudinal skeleton, the transverse skeleton and the secondary skeleton are installed and welded, then the dome plates are laid in sequence, the secondary skeletons at both ends of the dome structure module and the dome plates are not laid, both ends are used for installing the dome structure module, the chord length and chord height of the dome structure longitudinal skeleton are checked, the size deviation of both ends is determined to be within the design error range, after the size adjustment is completed, the dome plate is welded in the way of longitudinal first and then transverse.

[0013] Preferably, when the longitudinal skeleton module is assembled, the longitudinal skeleton, the transverse skeleton and the secondary skeleton are installed and welded, then the dome plates are laid in sequence, the secondary skeletons at both ends of the dome structure module and the dome plates are not laid, both ends are used for installing the dome structure module, the chord length and chord height of the dome structure longitudinal skeleton are checked, the size deviation of both ends is determined to be within the design error range, after the size adjustment is completed, the dome plate is welded in the way of longitudinal first and then transverse.

[0014] Compared with the prior art, the beneficial effects of the present application are as follows: The present application can effectively control the chord height and radius of the dome arc structure by adopting the assembly table to assemble the dome structure in a modular manner on the horizontal ground, and can effectively control the quality of the dome structure by reserving the welding shrinkage deformation allowance in advance according to the large welding engineering quantity, and can install the dome structure as a whole by the modular assembly manner of the dome structure, thereby changing the conventional high-altitude installation one by one and improving the installation precision, reducing the cost investment, shortening the construction period and improving the economic benefit. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a perspective view of the assembly table of the embodiment of the application; Figure 2 is a plan view of the embodiment of the application; Figure 1 Figure 3 is an elevation view of the embodiment of the application; Figure 1 Figure 4 is a structural diagram of the longitudinal skeleton module of the application; Figure 5 is a structural diagram of the longitudinal skeleton module of the application; Figure 6 is a finished product effect diagram of the dome structure of the application.

[0016] In the figure: 1-transverse beam, 2-longitudinal beam, 3-support column, 4-inclined brace, 5-carrier, 6-longitudinal skeleton, 7-transverse skeleton, 8-secondary skeleton, 9-dome plate.​​ Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-6 The modular assembly method for dome structures includes the following steps: Step 1: Prepare the assembly site; Step 2: Construction of the assembly platform. The assembly platform consists of transverse beam 1, longitudinal beam 2, support column 3, diagonal brace 4, and bracket 5. The construction steps are as follows: 1) Lay two longitudinal beams on the leveled assembly site according to the spacing between two adjacent main beams of the dome structure; 2) Use a level to measure and adjust the flatness of the longitudinal beam 2. Install the transverse beam 1 between the two longitudinal beams 2 according to the spacing of the longitudinal skeleton nodes of the dome structure. After installation, check the flatness of the assembly platform. 3) Set up a corresponding number of support columns 3 according to the connection points of the longitudinal and transverse frames of the dome structure. The height of the support columns 3 is based on the chord height of the longitudinal frame and is set up in the order of higher in the middle and lower on both sides. The height range of the support columns 3 is between 600-1700mm. After the support columns 3 are adjusted and fixed, install diagonal braces 4 on the side of the support columns 3 to reinforce the support columns 3 and increase the overall strength of the assembly platform, which facilitates ground construction operations. 4) Install bracket 5 on the outside of support column 3 within 180mm from the top. According to the chord height of the longitudinal skeleton of the dome structure, use a level to measure and adjust the height of the upper surface of the bracket so that the upper surface of the bracket 5 can fit with the lower surface of the longitudinal skeleton 6 according to the curvature of the drawing. Fix it after adjustment. Step 3: Assemble the dome structure modules at the construction site. The dome structure modules are divided into two types: modules with longitudinal frames and modules without longitudinal frames. The modules with and without longitudinal frames are arranged alternately and then welded together to form the main body of the dome structure. 1) The assembly steps for the module with longitudinal frame are as follows: Step 1: Construct the longitudinal frame of the dome structure according to the radius and chord height of the dome structure. When constructing the longitudinal frame of the dome structure, reserve a total length of 200mm at both ends. Step 2: Place the two completed longitudinal frames 6 on the bracket of the assembly platform, adjust the size and fix them on the assembly platform. Then install the transverse frame 7 and the secondary frame 8 in sequence. After the installation is completed, check the overall size. After the size is correct, weld and reinforce. Third step: after the longitudinal skeleton 6 and the transverse skeleton 7 are installed and welded, the dome plates 9 are laid in sequence, the dome plates at both ends of the module are not laid, the both ends are reserved for module installation, facilitating installation and construction work, the radius, chord height, chord length and both end size of the longitudinal skeleton 6 of the dome structure are checked and adjusted before the dome plate is fixed, the dome plate is welded and fixed after the size detection and adjustment is completed, and the module is transferred to the next assembly platform for welding work after the fixing is completed, the next group of modules is assembled on the platform, and the welding is performed in the manner of transverse first and then longitudinal; 2) The module assembly steps without longitudinal skeleton are as follows: First step: when the last group of modules with longitudinal skeleton is assembled, the module assembly without longitudinal skeleton starts, when the longitudinal skeleton 6 and the transverse skeleton 7 are connected, only the bolt connection is completed and no welding is performed, the secondary skeleton 8 is installed after the transverse skeleton 7 is installed, the overall size is checked after the secondary skeleton 8 is installed, and the welding and reinforcement are performed after the size is correct; Second step: after the transverse skeleton 7 and the secondary skeleton 8 of the dome structure are welded and reinforced, the dome plates 9 are laid in sequence, the dome plates 9 at both ends of the module are not laid, the both end positions are reserved for the dome structure module and used for installation, facilitating installation and construction work, the radius, chord height, chord length and both end size of the longitudinal skeleton 6 of the dome structure are checked and adjusted before the dome plate 9 is fixed, the dome plate 9 is welded and fixed after the size detection and adjustment are completed, the longitudinal skeleton 6 and the dome plate 9 are not welded at the connection position, the bolt connection between the dome plate 9, the transverse skeleton 7 and the longitudinal skeleton 6 is removed after all other parts are completely welded, at this time, the transverse skeleton 7, the secondary skeleton 8 and the dome plate 9 form an integral module, i.e. a module without longitudinal skeleton, at this time, the dome structure module can be lifted and transferred, and the next group of modules can be assembled by using the original two longitudinal skeletons 6; Third step: the size of the dome structure module assembled and welded is checked and adjusted before installation, the chord length of the longitudinal skeleton 6 of the dome structure module is checked, the actual installation size is measured, the excess part of the longitudinal skeleton 6 of the module with longitudinal skeleton is cut off according to the actual installation size, the cutting size is accurate according to the on-site measurement, the corresponding transverse skeleton 7 position is ensured to be the same after cutting, and the dome structure module size checking and adjustment is completed to facilitate the preparation work before installation.

[0019] By dividing the dome structure into two structure forms of modules with longitudinal skeleton and modules without longitudinal skeleton, adopting the modular assembly and welding method of the manufacturing plant, adopting the low-altitude integral construction method for the dome module components, the assembly and welding quality control is completed in advance, the size and height of the dome, the arc size can be controlled and adjusted in time during assembly, and the size deviation is controlled within the design error.

[0020] The production site should meet the operation space required by assembling at least two dome structure modules, and the site should be hardened to ensure the stability of the assembling table.

[0021] The height of the support column 3 is controlled to be 600-1700 mm, which facilitates the installation and welding operation of personnel on the ground, reduces the amount of high-altitude operation, after the installation of the support column 3 is completed, the diagonal brace 4 is installed to strengthen the stability and overall strength of the support column 3, and improve the overall deformation resistance of the assembling table.

[0022] When the longitudinal skeleton 6 is produced, the total size of the two ends is left with a 200 mm excess, which is used as a welding shrinkage size allowance, after the final assembly and welding are completed, the size is rechecked before the dome module is installed, and the excess part of the two ends of the longitudinal skeleton 6 is cut off.

[0023] After the longitudinal beam 2 and the transverse beam 1 are connected and fixed, the levelness of the longitudinal beam 2 and the transverse beam 1 is re-measured by using a level instrument, to ensure that the entire jig frame is kept on the same horizontal plane, and the support column 3 is set up at the intersection of the longitudinal beam 2 and the transverse beam 1.

[0024] The longitudinal skeleton 6 is placed on the bracket 5 of the assembling table, and after the size of the longitudinal skeleton 6 is determined to be correct, the fixing is completed, then the dome structure transverse skeleton 7 is installed according to the drawing, after the fixing is completed, the remaining ones are installed in turn, the connection and welding of the dome structure longitudinal skeleton 6 and the transverse skeleton 7 are completed, and finally the other dome structure secondary skeletons 8 are installed and welded.

[0025] When the longitudinal skeleton module is assembled, after the longitudinal skeleton 6, the transverse skeleton 7 and the secondary skeleton 8 are installed and welded, the dome plate 9 is laid in turn, the secondary skeleton 8 and the dome plate 9 at the two ends of the dome structure module are not laid, and the two ends are used for the installation of the dome structure module, the chord length and the chord height of the dome structure longitudinal skeleton 6 are checked, the size deviation of the two end points is determined to be within the design error range, after the size adjustment is completed, the dome plate is welded in the manner of first longitudinally and then transversely.

[0026] When the longitudinal skeleton module is assembled, after the longitudinal skeleton 6, the transverse skeleton 7 and the secondary skeleton 8 are installed and welded, the dome plate 9 is laid in turn, the secondary skeleton 8 and the dome plate 9 at the two ends of the dome structure module are not laid, and the two ends are used for the installation of the dome structure module, the chord length and the chord height of the dome structure longitudinal skeleton 6 are checked, the size deviation of the two end points is determined to be within the design error range, after the size adjustment is completed, the dome plate is welded in the manner of first longitudinally and then transversely.

[0027] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A modular assembly method for dome structures, characterized by: Includes the following steps: Step 1: Prepare the assembly site; Step 2: Construction of the assembly platform. The assembly platform consists of a transverse beam (1), a longitudinal beam (2), a support column (3), diagonal braces (4), and a bracket (5). The construction steps are as follows: 1) Lay two longitudinal beams on the leveled assembly site according to the spacing between two adjacent main beams of the dome structure (2); 2) Use a level to measure and adjust the flatness of the longitudinal beam (2), and install the transverse beam (1) between the two longitudinal beams (2) according to the spacing of the longitudinal skeleton nodes of the dome structure. After installation, check the flatness of the assembly platform. 3) Set up a corresponding number of support columns (3) according to the connection points of the longitudinal and transverse skeletons of the dome structure. The height of the support columns (3) is based on the chord height of the longitudinal skeleton and is set up in the order of high in the middle and low on both sides. The height range of the support columns (3) is between 600-1700mm. After the support columns (3) are adjusted and fixed, diagonal braces (4) are installed on the side of the support columns (3) to reinforce the support columns (3) and also increase the overall strength of the assembly platform, which facilitates ground construction operations. 4) Install brackets (5) on the outside of the support column (3) within 180mm from the top. According to the chord height of the longitudinal skeleton of the dome structure, use a level to measure and adjust the height of the upper surface of the bracket so that the upper surface of the bracket (5) and the lower surface of the longitudinal skeleton (6) can fit together according to the arc of the drawing. Fix it after adjustment. Step 3: Assemble the dome structure modules at the construction site. The dome structure modules are divided into two types: modules with longitudinal frames and modules without longitudinal frames. The modules with and without longitudinal frames are arranged alternately and then welded together to form the main body of the dome structure. 1) The assembly steps for the modules with longitudinal skeletons are as follows: Step 1: Construct the longitudinal skeleton of the dome structure according to the radius and chord height of the dome structure. When constructing the longitudinal skeleton (6), reserve a total length of 200mm at both ends. Step 2: Place the two completed longitudinal frames (6) on the bracket of the assembly table, adjust the size and fix them on the assembly table, and then install the transverse frame (7) and secondary frame (8) in sequence. After the installation is completed, check the overall size. After the size is correct, weld and reinforce. Step 3: After the longitudinal skeleton (6) and transverse skeleton (7) of the dome structure are installed and welded, the dome plate (9) is laid in sequence. The dome plates at both ends of the module are not laid. The two ends are reserved for module installation to facilitate installation and construction. Before fixing the dome plate, check and adjust the radius, chord height, chord length and the dimensions at both ends of the longitudinal skeleton (6) of the dome structure. After the dimensions are checked and adjusted, the dome plate is welded and fixed. After the fixing is completed, the module is transferred to the next assembly platform for welding. The next set of modules is assembled on this platform. Welding is carried out in the manner of first transverse and then longitudinal. 2) The assembly steps for modules without longitudinal frame are as follows: Step 1: When the last group of modules with longitudinal skeletons is assembled, the assembly work without longitudinal skeleton modules begins. When the last group of modules with longitudinal skeletons is assembled, when the longitudinal skeleton (6) is connected to the transverse skeleton (7), only the bolt connection is completed and no welding is done. After the transverse skeleton (7) is installed, the secondary skeleton (8) is installed. After the secondary skeleton (8) is installed, the overall dimensions are checked. After the dimensions are correct, welding reinforcement is carried out. Step 2: After the horizontal skeleton (7) and the secondary skeleton (8) of the dome structure are welded and reinforced, the dome plate (9) is laid in sequence. The dome plates (9) at both ends of the module are not laid. The positions at both ends are reserved for the installation of the dome structure module to facilitate the installation and construction work. Before fixing the dome plate (9), check and adjust the radius, chord height, chord length and the dimensions at both ends of the longitudinal skeleton (6) of the dome structure. After the dimensions are checked and adjusted, the dome plate (9) is welded and fixed. The connection between the longitudinal skeleton (6) and the dome plate (9) is not welded. After all other parts are welded, remove the connecting bolts of the dome plate (9), the horizontal skeleton (7) and the longitudinal skeleton (6). At this time, the three parts of the horizontal skeleton (7), the secondary skeleton (8) and the dome plate (9) form an integral module without the longitudinal skeleton. At this time, this dome structure module can be hoisted and transferred, and the original two longitudinal skeletons (6) can be used to continue the assembly work of the next group of modules. The third step is to check and adjust the dimensions of the assembled and welded dome structure modules before installation. Check the chord length of the longitudinal skeleton (6) of the dome structure module, measure the actual installation dimensions on site, and cut off the excess part of the longitudinal skeleton (6) of the module with the longitudinal skeleton according to the actual installation dimensions. The cutting dimensions are based on the on-site measurement to ensure that the corresponding transverse skeleton (7) positions are the same after each module is cut. Once the dimensions of the dome structure module are checked and adjusted, the pre-installation preparation work can be carried out.

2. The modular assembly method for dome structure according to claim 1, characterized in that: The production site should provide sufficient operating space for assembling at least two dome structure modules, and the site should be hardened to ensure the stability of the assembly platform.

3. The modular assembly method for dome structure according to claim 1, characterized in that: The height of the support column (3) is controlled between 600-1700mm, which facilitates personnel to install and weld on the ground and reduces the amount of high-altitude work. After the support column (3) is installed, diagonal bracing (4) is installed to strengthen the stability and overall strength of the support column (3) and improve the overall deformation resistance of the assembly platform.

4. The modular assembly method for dome structure according to claim 1, characterized in that: When the longitudinal frame (6) is made, an extra 200mm should be left in the total dimensions at both ends as a allowance for welding shrinkage. After the final assembly and welding are completed, the dimensions should be checked again before the dome module is installed, and the excess parts at both ends of the longitudinal frame (6) should be cut off.

5. The modular assembly method for dome structure according to claim 1, characterized in that: After the longitudinal beam (2) and the transverse beam (1) are connected and fixed, the flatness of the longitudinal beam (2) and the transverse beam (1) is re-measured with a level to ensure that the entire frame is kept on the same horizontal plane, and a support column (3) is set at the junction of the longitudinal beam (2) and the transverse beam (1).

6. The modular assembly method for dome structure according to claim 1, characterized in that: The longitudinal frame (6) is placed on the bracket (5) of the assembly platform. After the dimensions of the longitudinal frame (6) are confirmed to be correct, it is fixed. Then, the transverse frame (7) of the dome structure is installed according to the drawings. After the fixing is completed, the remaining frames are installed in sequence. The connection, fixing and welding of the longitudinal frame (6) and transverse frame (7) of the dome structure are completed. Finally, the other secondary frames (8) of the dome structure are installed and welded.

7. The modular assembly method for dome structure according to claim 1, characterized in that: When assembling the module with longitudinal skeleton, after the longitudinal skeleton (6), transverse skeleton (7) and secondary skeleton (8) are installed and welded, the dome plate (9) is laid in sequence. The secondary skeleton (8) and dome plate (9) at both ends of the dome structure module are not laid. The two ends are used for the installation of the dome structure module. The chord length and chord height of the longitudinal skeleton (6) of the dome structure are checked to determine that the size deviation of the two endpoints is within the design error range. After the size adjustment is completed, the dome plate is welded in the manner of first longitudinal and then transverse.

8. The modular assembly method for dome structure according to claim 1, characterized in that: When assembling the module without longitudinal frame, after the horizontal frame (7) and secondary frame (8) are installed and welded, the dome plate (9) is laid in sequence. The connection between the horizontal frame (7) and the longitudinal frame (6), and between the dome plate (9) and the longitudinal frame (6) is only temporarily fixed and not welded.

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