Arid geological grounding grid and its construction method for water retention and resistance reduction

Abstract

The invention provides a drought geological grounding grid comprising vertical grounding electrodes, horizontal grounding bodies, a grounding lead-out wire and a lightning rod. The drought geological grounding grid also comprises multiple grounding trenches. There are multiple vertical grounding electrodes. There are multiple horizontal grounding bodies. One horizontal grounding body is fixedly arranged in one grounding trench. The multiple vertical grounding electrodes and the multiple horizontal grounding bodies are arranged at the periphery of the lightning rod. The two ends of the horizontal grounding bodies are fixedly connected with the upper ends of the vertical grounding electrodes and connected with the grounding lead-out wire at the position of being close to the lightning rod. The grounding lead-out wire is connected with the lightning rod. The two ends of another part of the horizontal grounding bodies are fixedly connected with the upper ends of the vertical grounding electrodes. The vertical grounding electrodes are vertically arranged below the grounding trenches. The upper ends of the vertical grounding electrodes are higher than the bottom of the grounding trenches. The horizontal grounding bodies and the upper ends of the vertical grounding electrodes are wrapped by a resistance reduction agent layer. A mixed water retention agent fine soil layer is laid on the bottom part of the grounding trenches. A common backfill soil layer is arranged on the mixed water retention agent fine soil layer. The drought geological grounding grid is mainly used for the substation grounding grid of drought areas so that the laying depth of the grounding electrodes can be greatly reduced.

Description

technical field [0001] The invention belongs to the grounding grid construction in the field of electric power construction, and in particular relates to an arid geological grounding grid, and also relates to a construction method for water retention and resistance reduction of the arid geological grounding grid. Background technique [0002] Due to high soil resistivity in arid geology, reducing the grounding resistance of the grounding grid has always been a difficult problem in the industry. At present, the methods for reducing the grounding resistance of the grounding grid include: 1. Using a resistance reducing agent; 2. Using an ion grounding module; 3. Using soil ion additives. In arid geology, if the above three methods cannot meet the design requirements, it is necessary to deepen the grounding electrode and extend the grounding grid; thus the engineering volume and cost will increase greatly. Contents of the invention [0003] Aiming at the problem of high soil ...

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Problems solved by technology

In arid geology, if the above three methods cannot meet the design requirements, it is necessary to deepen the grounding electrode and extend the grounding grid; this will greatly increase the amount of engineering and cost

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