In recent years, China's economic construction has become more and more dependent on electric energy. The development of economic construction has promoted the development of electric power industry. With the full coverage and expansion of China's power grid construction, there are more and more electric power construction projects. The area covered by power lines is the basic guarantee for the arrival of electric energy. Without the erection of transmission lines, it is impossible to complete the transmission of electric energy, In order to complete power distribution and transmission more quickly, it is necessary to constantly innovate in the method and mode of line erection to meet the development needs of power industry in the new era, fundamentally ensure the stability and reliability of power supply, and promote regional economic construction and development.
Reasonable scientific measurement path; The route design of the line is related to the construction quality and safety, and also affects the cost and investment. It must be selected and surveyed reasonably. The key is to design the route in an economical and reasonable way. During the design process, a line sometimes needs 3-5 round-trip trips to determine the scheme. Only by improving the sense of responsibility can the design be done well.
Select economical and reasonable tower type; The type of pole and tower is directly related to the cost and safety, especially to the regional situation. For example, the land occupation, construction, transportation and operation are all directly related to the type. The cost of pole and tower accounts for more than 30% of the whole project. Only scientific and accurate design of pole and tower type can ensure the power supply effect.
The selection of conductor shall comply with the following standards: according to the Code for Design of Electric Power Lines, the stress at the very low point of conductor sag shall not exceed 40% of the instantaneous failure stress of the conductor. If the suspension point of the conductor is much higher than the very low point, the stress at the suspension point can be 10% higher than the stress at the very low point of sag. Therefore, when the line span is higher than the standard span limit, the conductor stress must be relaxed to ensure the safety of the line.
