The construction of thermal power plants is the main driving force of economic and social development. As a key module of thermal power plant construction, building structure construction needs more attention. The working loopholes in the construction stage of the building structure of thermal power plants usually lead to different degrees of building structure safety hazards, which have a negative impact on building quality and safety. It is an important work content to investigate the safety problems existing in the construction of thermal power plant building structure in time and analyze the main points of the construction of thermal power plant building structure. Especially in the process of construction and operation of structural buildings in thermal power plants, the scope involved is relatively wide, and the amount of construction work is also huge. The key points of structural construction of thermal power plant involve many factors, including not only the power plant equipment foundation of the main building, but also the materials of the building structure. Therefore, it is necessary to make clear the influence of structure construction quality level on building safety performance and the key nodes of building structure construction in thermal power plant, so as to implement quality control strategy more scientifically and reasonably.
1 Influence of structural construction quality on building safety performance
1. 1 quality of building structure materials
Building materials are one of the key elements in the construction of building structures in thermal power plants, and their quality level has an important impact on the safety level of building engineering achievements. The quality index evaluation of building materials not only covers the integrity and compressive capacity of building materials, but also includes the principle that the size standard of building materials can reach the standardization of building construction. Especially in the current process of building structure construction in thermal power plants, reinforced concrete is the main building construction structure, and the application of building construction molds is more frequent. If the size of building materials can't meet the standard, it will have a huge negative impact on the quality level of building achievements.
1.2 Uniformity of reinforcement of structural members
At present, steel bars are usually used in the construction stage of building structures in thermal power plants, and the frequency of application is high, and the construction quality affects the use of steel bars. The probability of reinforcement size and type is low, but the arrangement of reinforcement in structural members has a great influence on the construction results. As far as the building main reinforcement is concerned, the uniform stress is a relatively basic guarantee demand, and it is also the basic condition for the transmission of the supporting surface of the whole building structure. Once the main reinforcement configuration of a building is unbalanced, it will lean to one side, which will lead to the deviation of the actual bearing capacity of the building main body, especially under the action of external destructive force, which will lead to serious safety consequences due to uneven stress.
1.3 internal and external factors of building structure
The construction environment of building institutions in thermal power plants will also affect the safety performance of building structures. For example, in extremely low temperature areas, the concrete used in the construction stage of power plant building structure will be elongated in the setting stage, so its strength will change to some extent. In areas with high humidity, steel bars will also be corroded due to the humidity of the external environment, which will affect the durability of the whole building structure. In addition, the internal factors of the building structure will also produce corresponding acoustics. For example, the internal structure of the building is not tight, which will lead to insufficient concrete strength and insufficient bonding force between concrete and steel bars, which will bring security risks to the building achievements.
2 key nodes of power plant building structure construction
2. 1 Construction of main workshop and power plant equipment foundation
For thermal power plants, the workshop covers a wide range, including not only boiler room, steam turbine room, coal bunker room, oxygen removal room, but also a series of system buildings such as water and coal transportation. Therefore, the construction process of the main workshop of thermal power plant is relatively complex and diverse, involving a relatively large amount of engineering, relatively high construction technical requirements and a long construction period. In this process, the highest construction difficulty coefficient is the steam turbine unit, and the quality level of this component construction will directly affect the performance of the steam turbine in the production stage. After the turbine generator is built, it is necessary to ensure that the turbine does not settle when it enters the normal operation stage. It is not allowed at all, but only slightly uniform settlement, which is also an important point of the measured construction technology level.
2.2 Installation of steel structure workshop
For the construction of building structure of thermal power plant, the installation of steel structure workshop is a key node. Especially in the steel structure construction of boiler room, the working cycle is relatively long, which reflects the large amount of engineering. As far as China's domestic engineering practice is concerned, dozens of meters and more than 100 meters of engineering examples are relatively common. In order to facilitate the follow-up maintenance and operation of construction projects, the overall performance of boiler room construction must be excellent. In the process of steel frame hoisting in boiler room, the elevation and verticality of hoisting should be controlled well. In the hoisting stage, high-strength bolt connection is the main form. If these two key points are not effectively controlled, there will be great inconvenience in the specific installation stage. At the same time, if the screw setting does not meet the standardized standards, it will affect the stability of the boiler room steel frame and even increase the probability of accidents in subsequent operation.
2.3 Analysis of Building Materials
One of the key points of building structure construction in thermal power plant is the material of factory building, and the quality of the material has great influence on the construction process and results. Therefore, we must pay enough attention to building materials, which essentially ensures the construction of the building structure of thermal power plants. Different types of steel, concrete and welding materials are commonly used in the construction stage of thermal power plants, and these building materials need to conform to the standardization of national industries. Only by correctly analyzing the materials used in the factory building can we ensure the compliance and rationality of the materials used in the building, ensure the overall quality of the building to the greatest extent, and provide a good guarantee for the subsequent performance application and maintenance work.
3 Quality control measures for key nodes
3. 1 Ensure the construction quality of the main workshop foundation.
The construction of building structure in thermal power plant is a systematic engineering process, and the foundation construction of main workshop is a key and basic work link. At this construction stage, we should pay attention to foundation pit dewatering, strictly manage earthwork excavation, do a good job in foundation treatment and scientifically control construction projects. Combined with the engineering construction practice, the targeted construction scheme is formulated, the technical support is guaranteed, the overall deployment is made, and the differentiated management of the factory building is strengthened to provide favorable construction conditions for the quality of the factory building.
3.2 Ensure the quality of building materials
The construction quality of building structures in thermal power plants depends largely on the quality of building materials. Therefore, we must pay attention to the selection and audit of construction materials for power plant building structures, and pay more attention to the common concrete and steel in the construction process. In the construction stage, we should carefully check the materials used in the construction, know the supply channels of materials in detail, check the qualifications of suppliers, test the performance of materials, and deal with unqualified materials in time. It is strictly prohibited to use it in construction to better ensure the engineering quality.
3.3 Ensure the installation quality of steel structure in boiler room.
For boiler room, steel structure is divided into different units, however, horizontal beam and vertical beam are more critical. Therefore, in the specific installation stage of steel structure, it is necessary to ensure that the dimensions of the main structures used meet the requirements of design specifications, strictly review the main structures, strictly abide by the regulations in the installation process, ensure the details of the welding process, and strictly ensure the welding quality according to the requirements, so as to standardize the details, ensure the quality of the overall project construction and improve the overall effect level.
4 conclusion
With the strengthening of China's economic strength and the improvement of scientific and technological level, China thermal power plant has been continuously improved, and at the same time, it has a new application demand standard, which controls the key nodes of power plant building structure construction and injects power into power plant building structure construction.
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