Advantages and disadvantages of steel structure engineering construction technology and quality control measures
The continuous development of the economy has led to the progress of society, and the construction industry has also continued to move forward. Buildings are more like works of art, and steel structures are generally favored by architects, and the production, type and quality of steel and steel at home and abroad have increased substantially, but there are still many shortcomings in the field construction technology as well as quality control. This paper mainly analyzes the advantages and disadvantages of steel structure engineering construction technology, and how to control the construction quality through the correct construction technology in the construction process.
Steel structure has a wider application in the process of building construction, which can meet the requirements of strength and efficiency in building construction, and deal with construction problems in the construction process, and its materials can also be recycled, which is a very cost-effective type of building structure, and through the management of steel structure construction points, the overall quality of the construction project can be effectively guaranteed.
1. Analysis of the advantages of steel structure engineering construction technology
1.1 Promote the development of energy saving in the construction industry
The application of steel structure construction technology in construction projects helps to promote the green development of the construction industry and meet the needs of sustainable development. In the face of the challenges brought by sustainable development, the construction industry is the first to bear the brunt, energy saving and environmental protection has become the main theme, under the guidance of this concept of building construction, the need to choose more energy-saving and environmentally friendly materials. Steel construction technology is the main product of the industrialization of construction, which can meet the quality and safety needs of building construction, while extending the durability and stability of buildings and maximizing the development and utilization of resources.
1.2 Ensure the stability of building structure
The application of steel structure engineering construction technology can carry the weight of cement and concrete and has a strong load-bearing capacity. It can save material consumption and occupied space, reduce the cross-sectional area of the building, and avoid the total amount of steel structure exceeding the total amount of concrete. Even if an earthquake disaster occurs, the interaction of building materials can be effectively reduced to ensure the structural stability of the building and enhance building safety.
2. Analysis of steel structure engineering construction technology
2.1 Site lifting of building steel components
In the lifting process of steel structure engineering construction, the weight of steel beam and steel column single room is between 2t and 4t, the highest is 5t. In construction, due to the influence of road and construction environment, it is necessary to use 25t crane for lifting, for the lifting of secondary beam in construction and the work of pulling bar, etc., 8t crane can be used. To ensure the smooth implementation of the entire lifting work, it is necessary to develop a perfect lifting plan and make sure that the construction equipment can meet the construction needs. For example, the use of 25t crane for lifting process, need to use a single point lifting way, the steel column and sling interconnected, the use of rotary valve to lift the steel pipe column, the construction personnel need to implement to ensure that the steel pipe column to maintain a horizontal or vertical state. After the lifting is completed, the quality inspection is carried out for the steel pipe, and in the process of steel beam lifting, in order to avoid the situation of distortion and deformation and to ensure that the steel beam can be adjusted in real time, steel wires need to be set in the construction lifting point, and the angle between the sling and the horizontal surface is controlled between 45° and 60°. If the actual lifting of the components is more complicated, it is necessary to use the double machine lifting method for lifting. In addition, in the actual lifting process, it is also necessary to ensure that the components are evenly stressed, so that the bolts can penetrate into them freely and ensure the stability of the whole lifting process.
2.2 Bolt connection technology
This technology differs significantly from the ordinary bolt connection technology, and the operation facilities are simple, which can effectively improve the working efficiency and are widely used in the construction of steel structure projects. Combined with the characteristics of the bolt, including shear bolt connection, tensile bolt connection or the combination of two bolts connection method. The bolt itself has outstanding force performance, and the design needs to take into account the problem of pressure-bearing damage of the hole wall, and ensure the reasonable installation position in the steel structure installation to avoid the problem that the bolt does not match with the hole. Need to clarify the steel structure bolt connection sequence and installation standards, the use of reasonable quality control measures to regulate the orderly implementation of steel structure construction activities. It is also necessary to conduct anti-slip coefficient test and batch axial force test on bolts before installation to provide guarantee for construction quality.
2.3 Welding connection of steel members
The welding methods commonly used in steel structure engineering are: manual welding, semi-automatic welding and fully automatic welding. Steel construction site wind speed, manual arc welding more than 8m per second, should set up wind protection measures to reduce the impact of wind on the welding work; welding work area relative humidity is not more than 90%, when the welding surface of the steel components are wet, it is necessary to dehumidify the work to ensure the dryness of the welding surface; in addition, the welding temperature also has certain requirements, once the temperature is below 0 ℃, it is necessary to weld the base material before Heating, heating temperature of 20 ℃ or more, only to meet this requirement can continue to weld, and to ensure that the welding construction, the temperature always remains the same.
3. Quality control measures of steel structure engineering
3.1 Strengthen the management of technical personnel
In the process of construction site construction, construction personnel occupy the main position in the steel structure operation, in such a case, the personnel involved in the steel structure project must be specially managed. In the actual management of the personnel involved in the steel structure project, it is found that the actual management work often does not achieve the expected effect. First of all, because the level of professional knowledge and overall quality of the construction personnel involved in the construction of steel structure projects vary in all aspects, and are not professional steel construction personnel. Secondly, there are many problems for the management of steel construction personnel, the staff attitude is scattered, poor discipline, not easy to unify management, in the face of this problem construction units should prepare the corresponding management system to restrain them, should not use conventional methods of management. In addition should also strengthen the pre-job education and training of personnel, play the enthusiasm of the staff, so that they are in step, so that they naturally comply with the rules and regulations.
3.2 Improve construction control mechanism
The process of carrying out engineering construction must strengthen the attention to the construction quality control mechanism construction work, through the perfect construction mechanism to ensure the overall quality of engineering construction. First of all, the relevant units should improve the existing construction quality management mechanism, combine the problems that may occur in different construction links, and establish the corresponding management processing mechanism. Secondly, the importance of supervision of steel structure construction must be strengthened. Steel structure construction may encounter many different types of problems in the process of carrying out the construction, and its corresponding processing mechanism may also differ. For the sake of saving construction time and reducing construction difficulty, some construction personnel may use unreasonable construction methods in the construction process, but such methods do not meet the construction requirements. Under the supervision of the supervisory unit. All the work can be carried out in a scientific and reasonable way, and the chance of irregular construction problems is greatly reduced, which can effectively guarantee the overall quality of the steel structure. Finally, a sound supervision and management mechanism should be established within the construction party to encourage relevant construction personnel to supervise each other, cultivate their crisis awareness and rigorous working attitude, and ensure the rationality of building construction.