The Research On Power Engineering Construction Permafrost Technical Effect Assessment In High Altitude Areas

The rapid development of the national economy level, in recent years, has led to a tight power supply situation. The rapid development of the national economy inevitably requires adequate power supply as a guarantee, therefore, accelerating power engineering construction has become a current trend of economic development in an inevitable move. High altitude areas as political economy are not developed area, development of the power grid project is imminent. This paper aims to study high altitude permafrost grid engineering construction technical effect evaluation, and establishes the evaluation index system, it has an important guiding significance for subsequent projects.Generally high altitude area is defined as the region that average altitude is above 3000 meter, mainly including the plateau and alpine, the ecological environment is very fragile, low anti-interference ability, the system structure is easy to change, the function is extremely easy to be destroyed, high altitude areas of special natural environment determines its construction projects of high difficulty. Because of the special location at high altitudes, bring the power grid construction projects greater technical difficulties and higher safety requirements; at the same time, fragile natural ecological environment vulnerable to damage, which determines the grid project implementation process of the higher difficulty of construction. The main influence factor of the effect of high altitude area network engineering construction technology is the frozen soil, frozen soil is unique, it will have a significant impact on the construction. Because of the special nature of the high altitude area, it brings great difficulty to the power grid project, and it has a large difference in the common area. So we should puts forward higher requirements on the technology, applicability and safety. Designing properly and feasible permafrost construction technology evaluation system has important significance for the smooth implementation of the project.This paper focuses on the major disadvantage construction of high altitude permafrost issues faced grid projects, analyzes the characteristics and permafrost construction technology, then on this basis, builds a high altitude permafrost construction grid projects evaluation of specific technical indicator system, and its main indicators, including the stability of permafrost, frozen soil construction safety, reasonable applicability technology, construction progress and quality impact, environmental impact. Finally, the paper uses the independent decision-making perspective evaluation method and based on the difference of the overall combination evaluation method to analyze the Qinghai- Tibet empirical 400 kV DC Interconnection Project. Based on the Qinghai- Tibet empirical 400 kV DC Interconnection Project evaluation, verifies the validity of this study and provides for future reference basis for the construction of high-altitude-related projects.