A method for installing a special-shaped steel structure tree column

Abstract

The application provides a special-shaped steel structure tree column installation method, which comprises the following steps: construction technology preparation, steel component processing, steel component lifting point setting, first-level branched column installation, second-level branched column installation, third-level branched column installation and the like. The application realizes the purpose of efficient installation under the premise of ensuring the safety and quality of the installation process.

Description

Technical Field

[0001] This invention relates to the field of irregular steel structure installation technology, specifically a method for installing irregular steel structure tree columns. Background Technology

[0002] In the field of modern architecture, the innovative design and manufacturing of irregular steel structures have brought a brand-new style and creativity to cities. During their construction, how to complete the construction efficiently has become a key challenge. The traditional steel structure installation sequence is from top to bottom or from bottom to top. However, for irregular steel structures, their shapes are not only unique, but also have many branching support points. When installing from bottom to top, the cumulative error of the steel structure is relatively large. When installing from top to bottom, the tree-like steel structure cannot be connected to the top steel structure. Multiple adjustments and cutting are required to achieve accurate positioning. This means that personnel are working in a confined space for a long time, making it impossible to complete the installation work efficiently while ensuring safety and quality.

[0003] Therefore, the traditional method of installing irregular steel structure columns is not feasible. How to improve the efficiency of installing irregular steel structure columns while ensuring safety and quality has become a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of the above-mentioned prior art, the present invention proposes a method for installing irregularly shaped steel structure columns.

[0005] This invention provides a method for installing irregularly shaped steel structure columns, comprising:

[0006] Construction technology preparation: According to the design drawings, the irregular steel components are further refined and a three-dimensional model is made, and the irregular steel structure column is further refined into a three-level branch;

[0007] Steel component fabrication: According to the detailed drawings of the steel components, there are unequal numbers of primary, secondary, and tertiary branching columns. The tops of the primary and secondary branching columns are irregularly shaped nodes, which need to be processed in sections. The irregularly shaped nodes are cast using special molds. After the irregularly shaped nodes are completed, they are symmetrically welded to the corresponding primary and secondary branching columns. The tertiary branching column includes a steel column and a U-shaped steel plate. The open ends of the steel column and the U-shaped steel plate are connected by a pin assembly.

[0008] Steel component lifting point setting: During the detailed design, first calculate the position of the center of the top of each branch column. The lifting point of the first-level branch column is set at its top center, the lifting points of the second-level branch column are set at its top and side, and the lifting points of the third-level branch column are set on both sides of its upper part.

[0009] Installation of the first-level bifurcation column: hoist the first-level bifurcation column, control its verticality and elevation during the installation process, fix it with temporary fastening connecting plates after positioning, perform symmetrical welding after fixing, perform flaw detection after welding, cut off the temporary fastening connecting plates after the flaw detection is qualified, grind the weld residue of the temporary fastening connecting plates smooth, apply paint, and complete the installation of the first-level bifurcation column.

[0010] Secondary bifurcation column installation: After the primary bifurcation column is installed in place, the secondary bifurcation column is installed. During the installation process, its position and elevation are also controlled. After accurate positioning, symmetrical welding is performed. After welding, flaw detection is performed. After the flaw detection is qualified, the temporary lifting lugs are cut off, the weld residue of the temporary lifting lugs is ground smooth, and paint is applied to complete the installation of the secondary bifurcation column.

[0011] Installation of the three-stage bifurcation column: After the top steel structure is installed, the three-stage bifurcation column is installed.

[0012] Preferably, in the processing of the steel components, the irregular-shaped nodes are cast using a special mold, and the specific process includes the following steps:

[0013] Mold making: Create metal molds based on the shape and size of the irregular nodes;

[0014] Melting steel: The required steel is placed in a furnace for melting, and the melting temperature is not less than 1500℃;

[0015] Pouring: The molten steel is poured into the mold, filling the entire mold cavity;

[0016] Cooling and solidification: The molten steel cools and solidifies in the mold to form the desired irregular node;

[0017] Demolding: Open the mold, remove the solidified irregular node, and place it at room temperature for natural cooling; Trimming: For parts that do not meet the requirements, use tools to trim them to meet the requirements.

[0018] Preferably, during the processing of the steel components, based on the three-dimensional model, the three-level bifurcated columns are divided into two types according to the angle of connection with the top steel structure: one is a case with a large vertical tilt angle, and the other is a case with a small vertical tilt angle. For the case with a large vertical tilt angle, the three-level bifurcated columns are installed in one go, and the U-shaped steel plate is welded and assembled with the steel column into a whole. The pin assembly is another whole, and after processing, it is transported to the site. For the case with a small vertical tilt angle, a groove is reserved in the steel column so that the pin assembly and the U-shaped steel plate have adjustable space during on-site installation.

[0019] Preferably, in the installation of the three-stage bifurcated column, for cases with a large vertical tilt angle: after assembling the steel column and pin assembly, hoist it to the installation platform, use the top steel structure as a fixing point, lift the three-stage bifurcated column as a whole, connect the bottom of the three-stage bifurcated column with the two-stage bifurcated column, adjust the angle of the pin assembly so that its plane is initially parallel to the top steel structure surface, lift the three-stage bifurcated column so that the two planes are close together, and make adjustments. After accurate positioning, perform preliminary spot welding to fix the weld between the top contact surface and the steel column. First, weld the weld on the top contact surface, and then weld the weld on the steel column. After welding, perform flaw detection. After the flaw detection is qualified, cut off the temporary lifting lugs, grind the weld residue of the temporary lifting lugs smooth, apply paint, and complete the installation of the three-stage bifurcated column.

[0020] For cases with a small vertical tilt angle: Use the top steel structure as a fixing point to install the steel column in place, assemble the U-shaped steel plate and pin assembly, and embed the whole into the groove reserved in the steel column. Adjust the embedding depth and angle according to the site conditions to make the plane of the pin assembly initially parallel to the surface of the top steel structure. Lift the three-stage bifurcated column to make the two planes fit tightly together. Adjustments are made during the process. After accurate positioning, perform preliminary spot welding to fix the butt weld between the top fitting surface and the steel column. Then weld the U-shaped steel plate to the steel column, followed by welding the top fitting surface, and finally welding the butt weld of the steel column. After welding, perform flaw detection. After passing the flaw detection, cut off the temporary lifting lugs, grind the weld residue of the temporary lifting lugs smooth, and apply paint to complete the installation of the three-stage bifurcated column.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a method for installing irregularly shaped steel structure columns, which achieves the purpose of efficient installation while ensuring the safety and quality of the installation process. Attached Figure Description

[0022] Figure 1 This is an embodiment of the irregular tree-like steel structure of the present invention;

[0023] Figure 2 This is a schematic diagram of an irregular node according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of a pin connection node with a large tilt angle according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of a pin connection node with a small tilt angle according to an embodiment of the present invention;

[0026] Figure 5 This is a front view of the welding of the steel column and the U-shaped steel plate in an embodiment of the present invention;

[0027] Figure 6 This is a side view of the steel column and U-shaped steel plate welded according to an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the pre-reserved groove in the steel column according to an embodiment of the present invention;

[0029] Figure 8 This is a top view of the pre-reserved groove in the steel column according to an embodiment of the present invention;

[0030] Figure 9 This is a schematic diagram of a U-shaped steel plate according to an embodiment of the present invention;

[0031] Figure 10 This is a front view of the pin assembly according to an embodiment of the present invention;

[0032] Figure 11 This is a side view of the pin assembly according to an embodiment of the present invention.

[0033] In the diagram: 1. Primary branch column; 2. Secondary branch column; 3. Tertiary branch column; 4. Irregular node; 5. Lifting lug; 6. Top steel structure; 7. Pin; 8. Steel pin shaft. Detailed Implementation

[0034] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0035] Example: A method for installing irregularly shaped steel structure column, such as... Figure 1-11 As shown, it includes:

[0036] Construction technology preparation: According to the design drawings, the irregular steel components are further developed and a three-dimensional model is made. The irregular steel structure column is further developed into a three-level branch. The steel structure support system is erected according to the construction plan. A reasonable installation plan is formulated in combination with the actual site conditions. All on-site workers are given three-level briefings and pass the assessment. Welders and other special operation personnel are required to hold certificates to work.

[0037] Steel component fabrication: According to the detailed drawings of the steel components, there are unequal numbers of primary bifurcated columns 1, secondary bifurcated columns 2, and tertiary bifurcated columns 3. There are 12 primary bifurcated columns 1, 36 secondary bifurcated columns 2, and 108 tertiary bifurcated columns 3. The tops of primary bifurcated columns 1 and secondary bifurcated columns 2 are both irregular nodes 4, which need to be processed in sections. The irregular nodes 4 are cast using special molds. The specific process includes the following steps:

[0038] Mold making: Make a metal mold based on the shape and size of irregular node 4;

[0039] Melting steel: The required steel is placed in a furnace for melting, and the melting temperature is not less than 1500℃;

[0040] Pouring: The molten steel is poured into the mold, filling the entire mold cavity;

[0041] Cooling and solidification: The molten steel cools and solidifies in the mold to form the desired irregular node 4;

[0042] Demolding: Open the mold, remove the solidified irregular node 4, and place it at room temperature to cool naturally;

[0043] Repair: For any parts that do not meet the requirements, use tools to repair them until they meet the requirements;

[0044] After the irregular node 4 is completed, it is symmetrically welded to the corresponding first-level branch column 1 and second-level branch column 2; the third-level branch column 3 includes a steel column and a U-shaped steel plate, and the open ends of the steel column and the U-shaped steel plate are connected by a pin assembly; the pin assembly includes a steel pin 8 and a pin 7;

[0045] According to the 3D model, the three-level bifurcated column 3 is divided into two types based on the angle of connection with the top steel structure 6: one with a larger vertical tilt angle and the other with a smaller vertical tilt angle. For the case with a larger vertical tilt angle, the three-level bifurcated column 3 is installed in one go, and the U-shaped steel plate is welded and assembled with the steel column into a whole. The pin assembly is another whole, which is processed and transported to the site. For the case with a smaller vertical tilt angle, a groove is reserved in the steel column to provide adjustable space for the pin assembly and U-shaped steel plate during on-site installation. All welds are inspected for flaws after welding, and paint is applied after the flaws are qualified.

[0046] Setting of lifting points for steel components: The setting of lifting points for steel components should consider ease of lifting and stability. During the detailed design, the position of the center of the top of the steel column should be calculated first. The lifting point of the first-level branch column 1 should be set at the center of its top. The lifting points of the second-level branch column 2 should be set at its top and side. The lifting points of the third-level branch column 3 should be set on both sides of its upper part, staggered by 10cm. The lifting lugs 5 are all made of 20mm thick steel plates and welded around them. The welding quality meets the requirements of the third-level weld. The weld is coated with anti-rust paint for corrosion protection.

[0047] Installation of the first-level bifurcation column: The positions of the steel components in the original structure were checked using a total station. After accurate positioning, the first-level bifurcation column 1 was hoisted using a tower crane. During the installation process, the verticality and elevation of the column were controlled using a total station. After positioning, temporary fastening connecting plates were used for fixation. Symmetrical welding was then performed after fixation. After welding, non-destructive testing was performed. After passing the non-destructive testing, the temporary fastening connecting plates were removed, the weld residue of the temporary fastening connecting plates was ground smooth, and paint was applied to complete the installation of the first-level bifurcation column 1.

[0048] Secondary bifurcation column installation: After the primary bifurcation column 1 is installed in place, the secondary bifurcation column 2 is installed using a tower crane. During the installation process, a total station is used to control its position and elevation. After accurate positioning, symmetrical welding is performed. After welding, a flaw detection test is performed. After the flaw detection is qualified, the temporary lifting lugs are cut off, the weld residue of the temporary lifting lugs is ground smooth, and the paint is applied to complete the installation of the secondary bifurcation column 2.

[0049] Installation of the third-level branch column: After the top steel structure 6 is installed, the third-level branch column 3 is installed. For cases with a large vertical tilt angle: After assembling the steel column and pin assembly, use a tower crane to lift it to the installation platform. Using the top steel structure 6 as a fixed point, use a hand chain hoist to lift the third-level branch column 3 as a whole. Connect the bottom of the third-level branch column 3 with the second-level branch column 2. Use a hand chain hoist to adjust the angle of the pin assembly so that its plane is initially parallel to the top steel structure surface. Lift the third-level branch column 3 so that the two planes are close together. Adjust with a hammer. After accurate positioning, perform preliminary spot welding to fix the weld between the top contact surface and the steel column. First, weld the weld on the top contact surface, and then weld the weld on the steel column. After welding, perform flaw detection. After the flaw detection is qualified, cut off the temporary lifting lugs, grind the weld residue of the temporary lifting lugs smooth, and apply paint to complete the installation of the third-level branch column 3.

[0050] For cases with a small vertical tilt angle: Using the top steel structure 6 as a fixing point, use a hand-operated hoist to install the steel column in place. Assemble the U-shaped steel plate and the pin assembly, and use the hand-operated hoist to embed the whole assembly into the reserved groove of the steel column. Adjust the embedding depth and angle according to the site conditions to make the plane of the pin assembly initially parallel to the surface of the top steel structure. Lift the third-level bifurcated column 3 to make the two planes fit tightly. Use a hammer to adjust during the process. After accurate positioning, perform preliminary spot welding to fix the top fitting surface and the butt weld of the steel column. Then weld the U-shaped steel plate to the steel column, then weld the top fitting surface, and finally weld the butt weld of the steel column. After welding, perform flaw detection. After the flaw detection is qualified, cut off the temporary lifting lugs, grind the weld residue of the temporary lifting lugs smooth, and apply paint to complete the installation of the third-level bifurcated column 3.

[0051] Acceptance: After the installation of the three-stage bifurcation column 3, an overall acceptance inspection will be conducted.

[0052] The above are merely embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent substitutions made using the present invention's specification and drawings, whether directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of the present invention.

Claims

1. A method for installing a special-shaped steel structural tree column, characterized in that, The application relates to a construction technology for a tree-shaped column with three levels of branches. The application comprises the following steps: construction technology preparation: according to the design drawing requirements, the special-shaped steel member is deepened, and a three-dimensional model is made, and the special-shaped steel structure tree-shaped column is deepened into a three-level branch; steel member processing: according to the deepened drawing of the steel member, the first-level branch column, the second-level branch column and the third-level branch column each have unequal numbers of branches, the top of the first-level branch column and the second-level branch column is a special-shaped node, and the special-shaped node needs to be processed in sections and cast by using a special mold; the special-shaped node is symmetrically welded with the corresponding first-level branch column and second-level branch column after being completed; the third-level branch column comprises a steel column and a U-shaped steel plate, and the steel column and the opening end of the U-shaped steel plate are connected through a pin shaft assembly; steel member lifting point setting: the point position of the center of the top of each branch column is calculated during deepening design, the lifting point of the first-level branch column is arranged at the center of the top, the lifting point of the second-level branch column is arranged at the top and the side, and the lifting point of the third-level branch column is arranged at the two sides of the upper portion; first-level branch column installation: the first-level branch column is hoisted, the verticality and elevation of the first-level branch column are controlled during the installation process, the first-level branch column is fixed by using a temporary fastening connecting plate after positioning, the first-level branch column is symmetrically welded after being fixed, the first-level branch column is detected by using a flaw detection method after being welded, the temporary fastening connecting plate is cut off after the flaw detection is qualified, the welding seam residue of the temporary fastening connecting plate is polished and smoothed, and the first-level branch column is completed after being repainted; second-level branch column installation: the second-level branch column is installed after the first-level branch column is installed in place, the position and elevation of the second-level branch column are controlled during the installation process, the second-level branch column is symmetrically welded after being positioned accurately, the second-level branch column is detected by using a flaw detection method after being welded, the temporary lifting lug is cut off after the flaw detection is qualified, the welding seam residue of the temporary lifting lug is polished and smoothed, and the second-level branch column is completed after being repainted; third-level branch column installation: the third-level branch column is installed after the top steel structure is installed; in the steel member processing, according to the three-dimensional model, the third-level branch column is divided into two types according to the angle connected with the top steel structure, one type is a case that the vertical inclination angle is large, and the other type is a case that the vertical inclination angle is small; for the case that the vertical inclination angle is large, the third-level branch column is installed in place at one time, the U-shaped steel plate and the steel column are welded and assembled into an integral whole, the pin shaft assembly is another integral whole, and the third-level branch column is transported to the site after being processed; for the case that the vertical inclination angle is small, a groove is reserved in the steel column, so that the pin shaft assembly and the U-shaped steel plate have an adjustable space during on-site installation. For the case of large vertical inclination angle, the steel column and pin shaft assembly are assembled, hoisted to the installation platform, and hoisted up as a whole using the top steel structure as a fixed point. The bottom of the three-level branched column is docked with the two-level branched column, the angle of the pin shaft assembly is adjusted, the planes are preliminarily parallel to the top steel structure surface, the three-level branched column is lifted, the two planes are tightly attached, and adjustment is made. After accurate positioning, the top attachment surface and the steel column are docked and welded, and preliminary spot welding is performed. The weld of the top attachment surface is welded first, then the weld of the steel column is welded, and then the weld is detected. After the detection is qualified, the temporary lifting lug is cut off, the weld residue of the temporary lifting lug is polished, paint is applied, and the installation of the three-level branched column is completed. For the case of small vertical inclination angle, the steel column is installed in place using the top steel structure as a fixed point, the U-shaped steel plate and the pin shaft assembly are assembled, the whole is embedded in the groove reserved in the steel column, the embedding depth and angle are adjusted according to the site conditions, the plane of the pin shaft assembly is preliminarily parallel to the top steel structure surface, the three-level branched column is lifted, the two planes are tightly attached, and adjustment is made during the process. After accurate positioning, the top attachment surface and the steel column are docked and welded, and preliminary spot welding is performed. Then, the U-shaped steel plate and the steel column are welded, then the top attachment surface is welded, and finally the steel column is welded. After welding, the weld is detected, the temporary lifting lug is cut off, the weld residue of the temporary lifting lug is polished, paint is applied, and the installation of the three-level branched column is completed.

2. The installation method of the special-shaped steel structural tree column according to claim 1, characterized in that, In the steel member processing, the special mold is used for casting the special-shaped node, and the specific process includes the following steps: Mold making: metal mold is made according to the shape and size of the special-shaped node; Melting steel liquid: put the required steel into the furnace for melting, and the melting temperature is not less than 1500℃; Pouring: pour the melted steel liquid into the mold to fill the entire mold cavity; Cooling and solidification: the steel liquid is cooled and solidified in the mold to form the required special-shaped node; Demolding: open the mold and take out the solidified special-shaped node, and place it in room temperature for natural cooling; Finishing: for parts that do not meet the requirements, use tools to finish them to meet the requirements.

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