A method for assembling and welding rigid spatial steel structures

Abstract

The application discloses a kind of for rigid space steel structure's assembly and welding method, including S1, modular decomposition and pre-assembly: based on BIM platform, steel corridor is modeled three-dimensionally, after the overall structure is decomposed into several standardized modules, laser is used to verify.The application realizes accurate construction planning and real-time adjustment by the application of BIM modeling and simulation technology, BIM technology optimizes component decomposition, pre-assembly and installation sequence, so that construction personnel can operate according to accurate digital model, improve the accuracy of component docking, simulation system predicts welding deformation and provides compensation strategy, ensure that the quality of weld is stable, avoid structural deformation caused by welding stress, at the same time, high-altitude module digital system monitors installation deviation in real time, and is adjusted by intelligent control algorithm, so that module positioning accuracy is controlled within 1cm, ensure the stability and installation accuracy of overall structure, improve construction quality, reduce rework rate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of data management, in particular to a splicing and welding method for rigid space steel structure. BACKGROUND

[0002] Rigid space steel structure is a kind of space structure system with high rigidity and stability, which is mainly made of steel and formed by reasonable structure design and node connection. Its core feature lies in optimizing material distribution, connection mode and support system to ensure minimal deformation of the structure under load, suitable for large-span, super high-rise or high-stability building scenarios.

[0003] In the prior art, such as Chinese patent No. CN114776061B "A steel structure auxiliary component and main structure non-destructive connection construction method", including the following steps: construction preparation prepares watch chain type accessories and lifeline column, steel wire rope, standard joint, end connecting joint; watch chain assembly, column welding in standard joint, hole is arranged along the thickness direction of the column, one end of the hole is provided with a suction cup for covering the roof purlin to form a closed space, and the closed space is then extruded by the inner concave surface to remove the gas in the closed space, thereby connecting with the roof purlin by external atmospheric pressure without damage; a belt-shaped chain is formed which is not yet closed, and a circular pipe is welded at the middle position; high-altitude hoisting and assembling hoisting; the upper end of the circular pipe is provided with a hole for threading the steel wire rope, and the end of the steel wire rope is provided with a rope clamp.

[0004] The construction of traditional rigid space steel structure (such as large-span steel corridor) usually adopts whole hoisting or high-altitude scattered assembly process, however, whole hoisting requires high hoisting equipment and has the risk of component deformation, which is not safe enough, and high-altitude scattered assembly process is greatly affected by environment and manual operation, which easily leads to component misplacement and unstable weld quality, thereby affecting the installation precision, in addition, traditional process is difficult to realize modularization and cooperation, resulting in long construction period, high cost and low efficiency, at the same time, the pre-buried positioning precision of the support is insufficient, which not only affects the stability of the overall structure, but also increases the difficulty of abutting of the seismic isolation support.

[0005] Therefore, we propose a splicing and welding method for rigid space steel structure to solve the problems mentioned above. SUMMARY

[0006] The purpose of the present application is to provide a kind of for rigid space steel structure's assembly and welding method, to solve the problems of high requirement of overall hoisting to hoisting equipment, and there is the risk of component deformation, insufficient safety, high-altitude scattered assembly process is greatly influenced by environment and manual operation, prone to component misplacement, and welding quality is unstable, thereby affecting installation precision, in addition, traditional process is difficult to realize modularization cooperation, leading to long construction period, high cost, low efficiency, at the same time, the positioning accuracy of pre-buried support is insufficient, not only affect the stability of overall structure, also increase the difficulty of shock isolation support butt joint.

[0007] To achieve the above purpose, the present application provides the following technical scheme: a kind of for rigid space steel structure's assembly and welding method, comprising the following steps:

[0008] S1, modular decomposition and pre-assembly: based on BIM platform, three-dimensional modeling is carried out on steel corridor, after the overall structure is decomposed into several standardized modules, laser verification is carried out;

[0009] S2, digital simulation and dynamic control: simulation integration system is used to simulate hoisting and welding process, and high-altitude module digital system is used to monitor installation deviation in real time;

[0010] S3, high-precision shock isolation support positioning: transition steel plate pre-buried technology is used, transition steel plate is arranged on the top surface of lower pier, and anchor bolt hole and exhaust hole are pre-opened;

[0011] S4, modular high-altitude scattered assembly and welding: sectional hoisting combined with air scattered assembly process is used, and modules are installed according to the order of BIM model division;

[0012] S5, digital collaborative management: BIM platform is used to integrate construction data, and real-time monitoring of construction progress and quality is realized.

[0013] Preferably, in step S1, based on BIM platform, three-dimensional modeling is carried out on steel corridor, after the overall structure is decomposed into several standardized modules, laser verification is carried out, including the following contents:

[0014] S10, structure modularization splitting: based on BIM model, steel corridor overall structure is reasonably split into standardized construction modules, including steel column, steel beam, shock isolation support unit;

[0015] S11, ground pre-assembly: all standardized modules are ground assembled in pre-assembly area of factory or construction site, in pre-assembly process, real-time guidance is carried out by using BIM technology, and installation sequence is optimized in combination with construction simulation;

[0016] S12, laser scanning size accuracy verification: after pre-assembly is completed, laser scanning technology is used to detect the size accuracy of each module, and the laser scanning can capture three-dimensional point cloud data of the module.

[0017] Preferably, in step S12, the error is controlled within ±3mm, the three-dimensional point cloud data is compared and analyzed with the BIM model, and the error is found and adjusted in time.

[0018] Preferably, in step S2, the simulation integrated system is used to simulate the hoisting and welding process, and the high-altitude module digital system is used to monitor the installation deviation in real time, including the following contents:

[0019] S20, determine the module installation sequence: in the hoisting stage, the optimal module installation sequence is determined through simulation calculation, and the hoisting point layout is optimized;

[0020] S21, pre-judgment of welding deformation: in the welding process, the simulation system is used to pre-judge the possible welding deformation problem, and the corresponding compensation strategy is provided;

[0021] S22, monitor the installation deviation of the module: relying on the high-altitude module digital system, the installation deviation of the module is monitored in real time, and the dynamic adjustment is carried out through the intelligent control algorithm, so as to ensure that the module positioning accuracy is within 1cm.

[0022] Preferably, in step S3, the thickness of the transition steel plate arranged on the top surface of the lower pier is 3mm.

[0023] Preferably, in step S3, the transition steel plate is corrected by adjustable pull rod and level, and the levelness is controlled to be ≤3 ‰.

[0024] Preferably, in step S4, the segmented hoisting combined with the in-air scattered assembly process is used to install the modules in the order divided according to the BIM model, including the following contents:

[0025] S40, high-altitude butt joint: according to the order divided according to the BIM model, the prefabricated modules are hoisted to the specified position in sequence for high-altitude butt joint, and the module position is adjusted after temporary support, positioning pin or bolt fixation to make it align with the design reference;

[0026] S41, high-altitude welding and connection reinforcement: high-altitude welding process is used to weld the module connection parts, multi-layer welding technology is used for key connection nodes, and appropriate welding method is selected according to the material characteristics

[0027] S42, quality detection and weld repair: after welding is completed, the weld quality is comprehensively checked by using ultrasonic nondestructive testing, the welding defects found are repaired or repaired in time, and the connection nodes are checked for fastening;

[0028] S43, overall correction and post-processing: correction of the overall structure, and polishing of the weld, spraying of the corrosion-resistant coating, and construction of the fireproof coating.

[0029] Preferably, in step S41, the welding method can adopt manual arc welding, gas shielded welding or submerged arc automatic welding, and preliminary detection is performed after welding is completed.

[0030] Preferably, in step S42, non-destructive testing methods such as ultrasonic testing, magnetic particle testing or radiographic testing are adopted.

[0031] Preferably, in step S5, the BIM platform integrates construction data including hoisting parameters and weld detection data, the hoisting parameters including crane selection, hoisting point arrangement and hoisting path optimization, and the weld detection data including welding process parameters, weld grade and ultrasonic testing results, and the BIM platform is combined with sensors, RFID tags and GPS positioning in the construction site.

[0032] Compared with the prior art, the method has the following beneficial effects:

[0033] In the method, precise construction planning and real-time adjustment are realized through the application of BIM modeling and simulation technology, installation deviation is reduced, BIM technology optimizes component decomposition, pre-assembly and installation sequence, construction personnel can operate according to the accurate digital model, the accuracy of component docking is improved, the simulation system predicts welding deformation and provides compensation strategies to ensure stable weld quality and avoid structural deformation caused by welding stress, at the same time, the high-altitude module digital system monitors installation deviation in real time and adjusts through intelligent control algorithm to control the module positioning accuracy within 1cm, ensuring the stability and installation accuracy of the overall structure, improving construction quality and reducing rework rate.

[0034] At the same time, the pre-assembly of standardized modules reduces high-altitude operation time, improves construction efficiency, reduces safety risks caused by high-altitude scattered assembly, the simulation integrated system optimizes hoisting sequence and hoisting point layout to make the hoisting process smoother, reduces equipment occupation time, the pre-embedded transition steel plate technology improves support installation accuracy, avoids rework and reduces adjustment work caused by errors, in addition, construction simulation optimizes construction procedures to make installation connection smoother, shortens the construction period, reduces manual errors through digitalization and intelligent control means, improves operation efficiency, thereby reducing construction cost and improving the economy of the project. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 The flowchart of the method for assembling and welding the rigid space steel structure. DETAILED DESCRIPTION

[0036] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0037] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application. Figure 1 The present application provides a technical solution: a splicing and welding method for rigid space steel structure, characterized in that it comprises the following steps:

[0038] Step one, modular decomposition and pre-splicing: based on the BIM platform, a three-dimensional model of the steel corridor is established, the overall structure is decomposed into several standardized modules, and laser verification is adopted;

[0039] Modular decomposition and pre-splicing include the following contents:

[0040] Structural modularization: based on the BIM model, the overall structure of the steel corridor is reasonably split into standardized construction modules, including steel columns, steel beams, and seismic isolation support units;

[0041] Ground pre-splicing: all standardized modules are assembled on the ground in the pre-splicing area of the factory or construction site. In the pre-splicing process, BIM technology is used for real-time guidance, and the installation sequence is optimized in combination with construction simulation. Modularization not only helps factory processing, improves component manufacturing precision, but also reduces the workload of on-site construction, speeds up the installation progress, and improves the construction quality;

[0042] Laser scanning size precision verification: after pre-splicing is completed, laser scanning technology is used to detect the size precision of each module with high precision. Laser scanning can capture three-dimensional point cloud data of the module, so as to find possible errors and adjust them in time, ensuring the accuracy of on-site installation.

[0043] When laser scanning technology is used to detect the size precision of each module with high precision, the error is controlled within ±3mm. The three-dimensional point cloud data is compared and analyzed with the BIM model to find and adjust the error in time.

[0044] Step two, digital simulation and dynamic control: a simulation integration system is used to simulate the hoisting and welding process, and a high-altitude module digital system is used to monitor the installation deviation in real time;

[0045] Digital simulation and dynamic control include the following contents:

[0046] Determine the module installation sequence: in the hoisting stage, the optimal module installation sequence is determined through simulation calculation, and the hoisting point layout is optimized to improve the hoisting efficiency and reduce safety hazards;

[0047] Predicting welding deformation: During the welding process, the simulation system is used to predict possible welding deformation problems and provide corresponding compensation strategies to ensure stable welding quality;

[0048] Monitoring the installation deviation of the module: Relying on the high-altitude module digital system, the installation deviation of the module is monitored in real time, and dynamic adjustment is made through intelligent control algorithm to ensure that the module positioning accuracy is within 1 cm. Combined with high-precision sensors, laser measurement and Internet of Things technology, subtle deviations occurring during installation are automatically corrected, thereby improving the overall installation quality and efficiency.

[0049] Step three, high-precision isolation bearing positioning: The transition steel plate pre-embedded technology is used to set a transition steel plate on the top surface of the lower support pier, and pre-drill anchor bolt holes and exhaust holes to facilitate subsequent anchoring and gas exhaust, ensuring that the isolation bearing can be precisely connected with the steel gallery, improving the installation accuracy and stability of the overall structure;

[0050] The thickness of the transition steel plate set on the top surface of the lower support pier is 3mm;

[0051] The transition steel plate is corrected by adjustable pull rods and levels. The adjustable pull rods adjust the length to adapt to different installation needs, allowing the steel plate to be flexibly adjusted during connection to ensure the flatness of the joint and the stability of the overall structure. The level is used to measure and correct the levelness of the steel plate to ensure that it is consistent with the surrounding structure, avoiding stress concentration or installation errors caused by inclination or misalignment. The levelness is controlled to be ≤3‰.

[0052] Step four, modular high-altitude scattered assembly and welding: Adopting segmented hoisting combined with air scattered assembly process, install according to the module sequence divided by BIM model;

[0053] Modular high-altitude scattered assembly and welding includes the following:

[0054] High-altitude docking: According to the sequence divided by BIM model, the prefabricated modules are hoisted by tower crane or other lifting equipment in sequence, hoisted to the designated position for high-altitude docking, and the module position is adjusted after temporary support, positioning pin or bolt fixation to make it align with the design reference, ensuring the stability during assembly. Adjust the module position to align with the design reference to prepare for subsequent welding operations;

[0055] High-altitude welding and connection reinforcement: Adopting high-altitude welding process to weld the module connection parts to ensure that the weld quality meets the design requirements. For key connection nodes, multi-layer welding technology is used, and appropriate welding method is selected according to material characteristics. The welding method can be manual arc welding, gas shielded welding or submerged arc automatic welding, and preliminary detection is carried out after welding.

[0056] Quality Inspection and Weld Repair: After welding is completed, comprehensive inspection of weld quality is conducted using non-destructive testing. For any discovered welding defects, timely repair or re-welding is performed to ensure structural strength and safety. At the same time, the connection nodes are checked for tightness to ensure the stability of the overall structure. Non-destructive testing methods can include ultrasonic testing, magnetic particle testing, or radiographic testing.

[0057] Overall Correction and Post-processing: The overall structure is corrected by first polishing the welds to remove welding slag, burrs, and oxides generated during the welding process, improving the smoothness and overall aesthetics of the welds. Polishing is done using tools such as angle grinders and sanding machines to ensure a smooth, defect-free weld surface, providing a good foundation for subsequent corrosion-resistant and fire-resistant coating applications. If necessary, non-destructive testing such as ultrasonic testing or magnetic particle testing is performed to check the quality of the welds, ensuring that the welds are strong, free of cracks, pores, and other defects. Before applying the corrosion-resistant coating, the metal surface is cleaned to remove oil, rust, and impurities. If necessary, sandblasting or pickling is performed to enhance the adhesion of the coating. Finally, fire-resistant coating is applied to improve the fire resistance of the overall structure and enhance safety in the event of a fire. Fire-resistant coating application includes base treatment, primer application, main fire-resistant coating spraying, and surface protection layer application. Depending on the fire resistance rating, appropriate fire-resistant coatings such as intumescent or non-intumescent fire-resistant coatings are selected and applied using spraying or brushing techniques to ensure uniform coating thickness and good adhesion.

[0058] Step Five, Digital Collaborative Management: Utilize BIM platform to integrate construction data, realize real-time monitoring of construction progress and quality. In Step 5, BIM platform integrates construction data including lifting parameters and weld detection data. Lifting parameters include crane selection, lifting point arrangement, and lifting path optimization. Weld detection data includes welding process parameters, weld grade, and ultrasonic testing results to ensure efficient and orderly construction progress. BIM platform is not only used for pre-construction scheme simulation and optimization, but also collects and analyzes key data in real time during construction. BIM system combined with laser scanners, total stations, and range sensors realizes precise positioning of component lifting, improving installation accuracy of high-altitude scattered assembly. BIM platform combined with construction site sensors, RFID tags, and GP positioning realizes real-time tracking of construction progress. Management personnel can remotely view lifting progress, welding status, and quality detection results on the BIM platform, timely identify problems and adjust construction plans, improve intelligent level of project management. BIM platform also supports online collaboration among multiple parties, including construction units, supervisors, and designers, who can share real-time data through the BIM system to ensure transparent information and efficient communication, improve construction organization collaboration, and ultimately achieve visual, detailed, and intelligent management throughout the entire process.

[0059] In the method, first, a three-dimensional model is established by using a BIM platform, the whole structure is divided into standardized modules, and ground assembly is completed in a factory or a pre-assembly area during the assembly and welding process of a rigid space steel structure (such as a large-span steel corridor). During the pre-assembly process, the BIM technology provides real-time guidance, optimizes the installation sequence in combination with construction simulation, and finally improves the construction feasibility and reduces design changes through laser verification.

[0060] The simulation integrated system is used to simulate the hoisting and welding process, the optimal installation sequence can be calculated in the hoisting stage, and the hoisting point layout is optimized; the deformation problem is predicted by the simulation system in the welding stage, and a compensation strategy is provided. The high-altitude module digital system monitors the installation deviation in real time, and dynamically adjusts through an intelligent control algorithm, so that the positioning accuracy is ensured to be within 1 cm.

[0061] In order to improve the installation accuracy of the support, a 3mm thick transition steel plate can be pre-buried on the top surface of the lower pier, the levelness is controlled to be ≤3‰, and anchor bolt holes and exhaust holes are pre-opened.

[0062] During installation, the precast modules are hoisted to the specified position in sequence according to the order divided by the BIM model, and after butt joint, temporary support, positioning pin or bolt fixation and adjustment to the design reference are adopted. High-altitude welding process is adopted for welding, and multi-layer welding technology is applied to key nodes, appropriate welding method is selected in combination with material properties, so as to ensure the stability of the structure and the construction quality.

[0063] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for assembling and welding rigid spatial steel structures, characterized in that, The method comprises the following steps: S1, modular decomposition and pre-assembly: based on the BIM platform, a three-dimensional model of the steel corridor is established, the overall structure is decomposed into a plurality of standardized modules, and laser verification is performed; S2, digital simulation and dynamic control: a simulation integrated system is used to simulate the hoisting and welding process, and a high-altitude module digital system is used to monitor the installation deviation in real time; S3, high-precision isolation bearing positioning: a transition steel plate pre-burying technology is used to set a transition steel plate on the top surface of the lower support pier, and pre-drill anchor bolt holes and exhaust holes; S4, modular high-altitude scattered assembly and welding: a segmented hoisting combined with an aerial scattered assembly process is used, and the modules are installed in the order divided by the BIM model; S5, digital collaborative management: construction data is integrated by using the BIM platform to realize real-time monitoring of construction progress and quality.

2. The method for assembling and welding rigid spatial steel structures according to claim 1, characterized in that, In step S1, based on the BIM platform, a three-dimensional model of the steel corridor is established, the overall structure is decomposed into a plurality of standardized modules, and laser verification includes the following contents: S10, structure modularization splitting: based on the BIM model, the overall structure of the steel corridor is reasonably split into standardized construction modules, including steel columns, steel beams, and isolation bearing units; S11, ground pre-assembly: all standardized modules are assembled on the ground in the pre-assembly area of the factory or construction site, BIM technology is used for real-time guidance during the pre-assembly process, and the installation sequence is optimized in combination with construction simulation; S12, laser scanning size precision verification: after pre-assembly is completed, laser scanning technology is used to detect the size precision of each module with high precision, and laser scanning can capture three-dimensional point cloud data of the module.

3. The method of assembling and welding rigid space steel structures according to claim 2, characterized in that, In step S12, ensure that the error is controlled within ±3mm, compare and analyze the three-dimensional point cloud data with the BIM model, and find and timely adjust the error.

4. The method for assembling and welding rigid spatial steel structures according to claim 1, characterized in that, In step S2, the simulation integrated system is used to simulate the hoisting and welding process, and the high-altitude module digital system is used to monitor the installation deviation in real time, which includes the following contents: S20, determine the module installation sequence: in the hoisting stage, the optimal module installation sequence is determined through simulation calculation, and the hoisting point layout is optimized; S21, predict welding deformation: in the welding process, the simulation system is used to predict possible welding deformation problems and provide corresponding compensation strategies; S22, monitor the installation deviation of the module: relying on the high-altitude module digital system, the installation deviation of the module is monitored in real time, and dynamic adjustment is made through intelligent control algorithm to ensure that the module positioning accuracy is within 1cm.

5. The method of assembling and welding rigid space steel structures according to claim 1, characterized in that, In step S3, the thickness of the transition steel plate arranged on the top surface of the lower support pier is 3mm.

6. The method of assembling and welding rigid space steel structures according to claim 1, characterized in that, In step S3, the transition steel plate is corrected by adjustable pull rods and levels, and the levelness is controlled to be ≤3 ‰.

7. The method of assembling and welding rigid space steel structures according to claim 1, characterized in that, In step S4, the segmented hoisting combined with the aerial scattered assembly process is used, and the modules are installed in the order divided by the BIM model, which includes the following contents: S40, high-altitude butt joint: according to the order divided by the BIM model, the prefabricated modules are hoisted to the specified position in sequence for high-altitude butt joint, temporary supports, positioning pins or bolts are used to fix the modules, and then the module position is adjusted to make it align with the design reference; S41, high-altitude welding and connection reinforcement: high-altitude welding process is used to weld the module connection parts, multi-layer welding technology is used for key connection nodes, and appropriate welding method is selected according to the material characteristics; S42, quality detection and weld repair: after welding, the weld quality is comprehensively checked by ultrasonic non-destructive testing, and the welding defects found are repaired or repaired in time, and the connection nodes are checked for fastening; S43, overall correction and post-processing: the overall structure is corrected, and the weld is polished, the corrosion-resistant coating is sprayed, and the fireproof coating is constructed.

8. The method of assembling and welding rigid space steel structures according to claim 7, characterized in that, In step S41, the welding method can use manual arc welding, gas shielded welding or submerged arc automatic welding, and preliminary detection is performed after welding.

9. The method for assembling and welding rigid spatial steel structures according to claim 7, characterized in that, In step S42, ultrasonic testing, magnetic powder testing or radiographic non-destructive testing methods are used.

10. The method of assembling and welding rigid space steel structures according to claim 1, characterized in that, In step S5, the BIM platform integrates construction data including lifting parameters and weld detection data, the lifting parameters include crane selection, lifting point arrangement, lifting path optimization; the weld detection data includes welding process parameters, weld grade and ultrasonic testing results, the BIM platform combines sensors, RFID tags and GPS positioning in the construction site.

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