The main points of construction management of large-scale steel structure workshops are analyzed from pre-construction preparation, steel structure production and installation process, pointing out the main points and methods of construction management of steel structure workshops.

 

 

(1) Forming a project management team. According to the characteristics of the project, it is necessary to select personnel with experience, strong technical ability, strong sense of responsibility, and coordination. It is necessary to have professional support, especially the choice of the director must have good professional quality and service awareness; The role of the functional department, according to the characteristics of the project to choose the appropriate form of supervision organization.

 

(2) Familiar with drawings, specifications and design requirements, preside over the review and design of the drawings; understand the construction units, and prepare targeted supervision plans and supervision implementation rules and management plans. Managers must be familiar with drawings, design ideas, master specifications, atlas, and understand the requirements of management rules. Understand the functional requirements and design intent of the steel structure, do a professional "design check", understand the project operation system and management system of the construction unit, and urge its quality management system, technical management system, safety management system to be implemented, and check The employment certificate, the verification of the post certificate of the main operators, the investigation of the quality of the team should be carried out, and the management requirements should be put forward in order to provide guarantee for the smooth progress of the project.

 

(3) Strengthen inspection and audit of subcontractor qualification and steel structure processing and production plants. Strengthen the inspection of steel structure production plants, mainly to investigate the equipment capacity, technical capability, process design capability, process flow, process inspection, inspection means and conditions, quality management system, welding process evaluation, assembly conditions, etc. The unit shall propose rectification and rectification within a time limit. The construction unit shall cooperate with the supervision and rectification, and sign the qualification review report and the commencement order after the rectification is in place. It is necessary to review the quality assurance system and quality inspection system of the subcontracting unit, and check whether the self-inspection equipment and usage conditions meet the requirements of the project.

 

(4) Carefully review the construction organization design and construction plan of the construction unit, whether it can meet the special characteristics of the project, especially the lifting plan, according to the analysis of the site conditions, the entry and exit of the heavy lifting equipment and the working position, the site of the site Hardening, etc.; rationality of on-site construction arrangement, quality, schedule, safety, construction guarantee measures under special conditions, mechanical equipment, instruments, inspection tools, etc., should be supervised to meet the requirements of this project, and the supplementary technology should be corrected. Measures must be implemented. The use of new technologies, new materials and new processes must have process tests and appraisal opinions, and urge the construction units to improve and strengthen the control of various management objectives. The responsibility systems at all levels should be implemented and operated effectively.

 

 

(1) Check the warranty documents and inspection reports of various raw materials and the on-site sampling retest report, and the qualified ones are allowed to be used in this project. Supervisors who have skills, experience, and management skills live in the production site. Because there are not many people on site, it is very demanding.

 

(2) The production plant should have experience in the production process of such medium-sized steel structures. Otherwise, it is necessary to carry out process test and evaluation, analyze design requirements, and use reliable technology to produce prototypes. Main inspections: blanking plate, steel plate surface quality, welding process (flux must have warranty document, drying record, personnel employment certificate, weld height, flaw detection), friction surface treatment, component size inspection, pre-assembly size gap, Film thickness and coating materials.

 

(3) Construction site inspection: high-strength bolt certificate, torque coefficient, tightening axial force, retest report (torque coefficient and anti-slip test with friction surface) components on-site inspection (mainly check size, number, deformation), construction It is necessary to enter the field according to each beam and column. The main points of on-site installation quality inspection: mainly check the top surface of the beam and column. Firstly, check the calibration certificate of the torque wrench (electric) and the flatness of the friction surface, and then check the high-strength bolt. The specification of the tightening requires that each node should be found. Pay attention to the principle of symmetrical tightening and segmental fastening. Finally, check the gap of the top tight surface and require more than 80% of the area to be close. The sampling anti-slip test and the weld flaw test are also carried out at the site.

 

(4) Control points of on-site welds: The design should minimize the on-site welding, and if necessary, strengthen the weld quality control. First, it should not be carried out in rainy and foggy weather. After the weather is fine, it can be started for more than 1 hour, and it is necessary to use heat. After the blower is blown dry, the welding rod should be welded to the factory. It is the same batch number, used after drying. It is best to weld the thick steel plate at the factory. The first-grade weld is required to be carried out at the factory. After the welding is completed, the weld is required one by one. Conduct a flaw detection. Key points for control of wall and roof envelope structure: first check whether the purlins and color plates meet the design requirements, pay attention to whether the thickness and material, the manufacturer and the surface coating meet the requirements, check the certificate of all materials, and secondly check whether the occlusion form of the roof panel is Meet the design requirements, and then focus on the verticality, flatness, panel joint quality, edging, flooding form, waterproof quality and apparent quality of each large surface during the installation process. The surface color is determined by the sample. Other auxiliary materials control the manufacturer and technical parameters according to the contract and design requirements.

 

(5) Control of fireproof coatings and anti-corrosion coatings: It is important to control the source of materials, inspection reports and on-site sampling test bonding strength, while supervising the thickness, number of passes of the coating, and the fire resistance limit is the main data to ensure the use of functions. It is necessary to classify and check the thickness of various types of components and cooperate with the inspection of the fire department.

 

(6) Coordination of the construction process: often the steel structure, the envelope structure and the civil structure are completed by different units, and sometimes there is no contractual relationship with each other. This requires the supervision (management) unit to carry out a large amount of coordination and scheduling with the owner. There will be many contradictions, especially coordination of work schedules, site coordination, material storage, product protection, etc. Poor handling will affect the construction period, quality and cost increase, especially for safety accidents, so we should contract, manage, organize, Information and other aspects of assistance and coordination, it is recommended that the owner designate the general contractor unit to coordinate on-site coordination, management and owner planning, contract management is an ideal model.

 

(7) Strengthen safety supervision and management, implement the effective operation of the safety responsibility system and safety management system, and control safety risks.

 

 

After the completion of the project, the construction units should be urged to improve the technical materials, sort them into a book, and prepare for acceptance. The supervisor shall organize all responsible entities to carry out pre-acceptance of the project. The supervisor shall conduct data acceptance inspection, inspection report inspection, quality assessment report, supervision work preparation and construction technology, management, quality assurance data inspection and handover, and assist the owner to complete the project completion acceptance. And information preparation.