Tree crossing design method for transmission line corridor

Abstract

A corridor tree span design method of electric transmission line comprises steps as follows: cutting down 3-5 analysis trees in the wood in which a high voltage line is to be erected, after every tree is cut down, sectionally cutting out round discs according to length of 2 m, counting the annual rings of every round disc, measuring the diameter of every annual ring, drawing a stem analysis cross-section diagram, taking the Richards model as a prediction model, fitting by a correction index model at the same time, obtaining the theoretical values of the annual growth amount of the trees, predicting the future growth amount according to a regression curve, calculating the tree height prediction values and tree height growth limit values of different ages according to the future growth amount, carrying out optimized type selection design to overhead line structures according to estimated natural maximum growth height of the trees. The invention is advantaged by accurately predicting the height of the corridor trees, rationally designing the height of the overhead line structures, realizing erecting over the trees, finally ensuring safe operation of the power line, reducing construction cost, avoiding cutting the trees in large area and protecting the ecological environment and the forest cover.

Description

technical field [0001] The invention relates to a process method, in particular to a tree-crossing design method for transmission line corridors. Background technique [0002] In recent years, with the rapid development of the national economy, the construction of the power grid has ushered in an unprecedented climax period. At the same time, the contradiction between the construction of the power grid, especially the construction of transmission lines, and environmental protection has become increasingly prominent. On the one hand, the construction period The requirements are short, and the project cost is strictly controlled. On the other hand, the resources of the line corridor are becoming more and more precious, and the country's requirements for environmental protection are getting higher and higher. The cleaning of the line corridor, especially the cleaning of trees in the passage is not only expensive but also very difficult. In the current national power transmissio...

AI Technical Summary

Problems solved by technology

However, up to now, there is no complete evaluation method for the height of transmission line corridor trees that can scientifically and accurately evaluate the natural growth height of transmission line corridor trees, resulting in a lack of theoretical basis for the design of line towers, resulting in the design height of line towers being too high or too low , when the design is too high, it will inevitably increase the construction cost and cause waste. When the design is too low, as the tree grows, the vertical distance between the wire and the tree top will be less than the safe distance, so that the power department has to increase the height of the line tower, and it will also Waste due to duplication of construction

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