Application of steel structure space frame construction technology and quality control measures

1. Main characteristics of space frame steel structure construction technology

As a space frame structure, space frame steel structure is mainly used in large-span roof structures. Space frame steel structure has high variable strength and is lightweight, which can be divided into orthogonal and oblique structures. Orthogonal steel is the square, to ensure the convenience of construction. Skew is mainly applied to the large-span bidirectional truss, which ensures the uniform distribution of the force of each structure and improves the bearing capacity of the structure through the cross truss structure.

In the space frame steel structure, the selected construction steel has higher strength and performance. The strength of steel is mainly to improve the shear resistance of the cross-section of the steel structure. Space frame steel structure can make the construction process more smooth and strengthen the economic benefit of the project on the basis of improving the progress of the project. Space frame construction technology has an important impact on the overall quality of the project, which is mainly due to the space frame structure as the main structure of the project, in the installation process, the structure will inevitably act on the direct weight of the space frame support system. Space frame steel structure construction technology is to set up the support system under the space frame, which has its own technical construction characteristics. The site needs to coordinate the storage yard under and around the space frame, to achieve scientific stacking of construction materials.

Secondly, the space frame structure construction must be operated on the support system in the air, the operation space is small, can not let the site construction personnel flexibly carry out, there are certain operation limitations, and higher technical requirements for workers.

Finally, it is not easy to dismantle the support system after the completion of space frame construction, and the strength and height of the support system used in the installation of the space frame steel structure are not uniform. Each project must be combined with the characteristics of the space frame structure to set up a unique support system, which also increases the difficulty of construction. By controlling the installation and welding quality of the support system, the stability of the support system can be effectively improved and the risk of the support system can be reduced. After the installation of the space frame, the construction inspection should be done to avoid potential construction quality problems, because, after the removal of the support system, it will become very difficult to rectify the construction quality of the space frame.

2. Main problems

2.1 A sound technical management system is required

At present, although there is a technical management system in the process of engineering construction, it is relatively backward, the construction quality of the technical management system is not good, and BIM technology has not been fully popularized. In the process of space frame steel structure construction, it is necessary to combine with roofing system, mechanical and electrical system, curtain wall system, maintenance channel, floodlighting and other professionals, and to make effective arrangements in advance for engineering construction problems during the construction period.

2.2 High requirements for personnel specialization

Engineering construction needs a large number of construction personnel and has a strong dependence on professional and technical personnel. The proportion of high technical personnel in the project construction team is small, and most of them are migrant workers who have not learned professional knowledge. Generally speaking, the construction of the project is normative and planned. The technical level of construction personnel may not be able to achieve the unified requirements, in the process of construction and can not be in accordance with the process of construction, or because the technical level is not good enough to lead to some work mistakes in the process of construction, construction quality will be limited by the technical level of personnel.

Main development strategies

3.1 Standardize the installation and removal of space frame steel structure

The stability of the space frame steel structure foundation can be strengthened by hardening or related methods to avoid safety accidents. The raw materials used should be inspected in advance. Engineering building materials should be consistent with the standard in the technical scheme, and can not appear rust, thin and other quality problems.

3.2 Introduction of advanced scientific equipment

The introduction of advanced scientific equipment can not only shorten the construction period, create more economic benefits for the construction side, but also provide security for the life and property safety of grass-roots staff. For some of the more complex operations of the construction project, the use of this scientific equipment can make some parameters set more accurate, the construction staff can also be carried out in strict accordance with the design standards.

3.3 Strictly manage construction personnel

Most of the main staff in the technical construction of the space frame steel structure receive low education, the technical level is relatively poor. It will affect the quality of the construction. Therefore, it is necessary to strengthen the management of construction staff, inculcate them with safety awareness and quality awareness, and let them know how to carry out safe construction.

conclusion

In a word, with the continuous expansion of space frame steel structure construction scale, the on-site technical management of space frame steel structure has become an important content of construction project quality assurance. In this stage of space frame steel structure construction management, the effective development of the project is often restricted by the lack of management methods. Therefore, the construction companies should increase the relevant management staff to pay attention to the site project management and combined with the actual construction stage, comprehensive control of the construction risk due to space frame steel structure, to provide guarantee for the construction site construction technology quality.