With the continuous development of modern economy, steel structure engineering has been widely used in the engineering field with its superiority of fast construction, short period, high strength, easy prefabrication, installation and applicable high-rise large span. In the past, a large number of reinforced concrete structures and pre-stressed concrete structures were used, and on-site engineers and technicians were relatively lack of experience in the construction of steel structure engineering, and the quality of construction directly affected the safety of the engineering structure. Thus, the quality of steel structure engineering has also drawn more and more attention, so it is of great practical significance and necessity to strengthen the construction quality control of steel structure engineering.
A.Construction quality control points
Construction preparation is the construction of construction to create the necessary conditions, seriously, meticulously and thoroughly do a good job of construction preparation, to give full play to the positive factors of human, reasonable organization of human and material resources, speed up the progress of the project, provide construction quality, save investment and materials, and play an important role in the successful completion of the steel structure construction tasks.
a. Seriously do a good job in the construction drawings of the meeting and delivery of drawings is the basis for the construction of the project, the technical person in charge of the project should organize the relevant technical personnel to review and digest the drawings, the purpose of which is to make the construction unit and the participating units familiar with the design drawings, understand the characteristics of the project and the design intent, identify the technical problems that need to be solved, and develop solutions; secondly, in order to solve the problems in the drawings The second is to solve the problems in the drawings, reduce the errors in the drawings, and eliminate the hidden quality problems in the drawings in the bud. At the same time do a good job of technical delivery, do a good job of the combination of construction and design, do a good job of steel structure lifting and civil construction, steel structure and concrete structure prefabricated combination.
b. Conscientiously prepare the construction organization design of steel structure engineering construction organization design is an important comprehensive technical document prepared by the construction unit to guide the activities of the whole process of engineering construction, is a scientific management method. Construction units in the preparation of construction organization and construction program, shall be from the five aspects of human, machine, material, method, ring to develop practical and specific implementation details, the implementation of the plan, the implementation of organizational personnel, the implementation of self-inspection, mutual inspection and special inspection, the easy to appear all the quality problems into the state of control, to ensure that the program technical measures are effective and feasible. In the preparation and implementation of the construction organization and design process should do extensive and in-depth research, to the construction personnel to hand over the bottom, so that everyone gate-keeping. The steel structure project should be prepared for the production stage and installation stage of the production process and installation construction organization design respectively. The content of the production process should include the quality standards and technical requirements of each process and sub-project in the production stage, as well as the specific measures to ensure product quality. The construction organization design of steel structure installation project includes the establishment of quality assurance system and technical management system, measures and methods of quality and progress control, and the arrangement of construction period.
B.Pay attention to the quality control of steel structure foundation engineering
Quality control of steel foundation engineering generally refers to the quality control of steel foundation pre-buried bolts, pre-buried bolts is the first step of the entire construction, but also a very critical step, is the foundation of the entire project. Construction of foundation pre-buried bolts first familiar with the drawings, understand the intent of the drawings, should be made to install the template. Pre-embedded bolts with two installation formwork and steel positioning in the main reinforcement of the column and the formwork to ensure that the pre-embedded bolts are not displaced by the construction of civil pouring concrete. So that the spacing and height between each group of bolts can be controlled within the allowed error; at the same time, protect the bolt fillet from being damaged during the concrete pouring. After the completion of the civil engineering, use the latitude and longitude meter and level to review the elevation and axis of the ground bolts, and make a record. And hand over to the next process for acceptance.
C.Quality control of steel structure fabrication project
The construction of steel structure engineering usually goes through two stages: factory fabrication and on-site installation. Most of the time, the steel structure project is carried out inside the factory workshop, because the quality of the steel structure components processed and manufactured in the factory is crucial to the on-site installation of the steel structure project and the safety and stability of the overall structure. Therefore, the steel structure production manufacturer must have the corresponding enterprise qualification, production scale, technical ability, mechanical equipment and advanced technology level. The general production process of steel structure is divided into: sampling → material → plate → cutting → assembly → submerged arc welding → drilling → assembly → corrective molding → riveting spare parts under the material → production and assembly → welding and welding inspection → antirust treatment, painting, numbering → component acceptance factory. In the steel structure fabrication, according to the steel structure fabrication process, key processes should be seized for quality control, such as control of the processing of key parts, the process of the main components, measures, the processing equipment used, process equipment, etc.