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Grounding resistance reduction process method for sand/gravel area

A technology of sand, gravel, and process method, which is applied in the direction of connection, connection contact materials, electrical components, etc., can solve the problems of high implementation cost, unstable grounding resistance value, etc., and achieve convenient construction, best resistance reduction effect, low cost effect

Active Publication Date: 2014-05-28
SHANDONG ELECTRIC POWER ENG CONSULTING INST CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The grounding resistance value obtained by drilling a hole with a depth of 12 meters does not exist stably, and the grounding resistance value tends to increase over time, and the implementation cost is also high

Method used

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  • Grounding resistance reduction process method for sand/gravel area
  • Grounding resistance reduction process method for sand/gravel area
  • Grounding resistance reduction process method for sand/gravel area

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Experimental program
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Embodiment Construction

[0046] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0047] Such as figure 1 As shown, for the ground 1, the infinite diffusion current 4 spreads across the joint surface of the metal vertical ground electrode 2 and the ground soil. When the current 3 flows out from the vertical ground electrode 2, the current 3 in the vertical ground electrode 2 spreads to all directions of the soil. Surrounding the grounding electrode, the geometric resistance of the soil is the sum of the series resistance of the actual earth shell, gradually outward from where the vertical grounding electrode 2 is located. Close to the vertical ground electrode 2 enclosure has only a small surrounding area and cross-section, and the soil geometry is small, so it has a high electrical resistance. The enclosure progresses to larger regions where the soil geometry increases and thus gradually assumes a lower electrical resistance. Tha...

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Abstract

The invention discloses a grounding resistance reduction process method for a sand / gravel area, which comprises: establishing a pit on a construction site based on the characteristic of good water retention capability of red clay, setting up a vertical grounding electrode in the pit, laying mixture of a resistance reduction agent and water around the grounding electrode, filling red clay around the vertical grounding electrode with the laid mixture of the resistance reduction agent and the water for forming a red clay body, making the vertical grounding electrode connected with a grounding wire, pouring the red clay body layer by layer with water, and compacting the red clay body layer by layer. The invention has the beneficial effects that: the cost is low; and the process is simple; and the effect of resistance reduction is best and stable and reliable in a long time, and the method can be applied in any project with requirements for the grounding resistance.

Description

technical field [0001] The invention relates to a grounding resistance reduction process method, which belongs to the technical field of electrical device grounding resistance reduction and lightning protection, and particularly relates to a grounding resistance reduction process method for large-scale electrical devices in high resistivity areas, especially when the resistivity is greater than 4000Ω.m. The buried depth of the groundwater level is about 80 meters or less from the surface, the annual precipitation is not higher than 100mm, and the maximum frozen soil depth in winter is 1.4 meters. The grounding resistance requires 0.2Ω or less in the sand, pebble and gravel area. Background technique [0002] The Quaternary Renewal System (Qp 3-1p1 ) impact, diluvial sand pebble gravel layer, the distribution of the strata is extensive and stable, the lithology does not change much evenly, the strata have no obvious stratification, and there are only medium-fine sand lenses w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01R4/66H01R43/00
Inventor 任天新付元珍崔宏伟任占泉张洪霞邓琳孙晓峰付向军姜哲
Owner SHANDONG ELECTRIC POWER ENG CONSULTING INST CORP
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