Structure of lightning protection grounding network in karst area and manufacturing method thereof

Abstract

The invention discloses a structure of a lightning protection grounding network in the karst area and a manufacturing method thereof. The method comprises the following steps: firstly, digging a deepwell in the area where lightning protection equipment is going to be buried; putting a metal electrode provided with a permeability hole in the deep well; and then, injecting the resistance reducing material from the metal electrode, and enabling the resistance reducing material to enter in the deep well form the permeability hole of the metal electrode to fill the deep well, wherein in the process of digging the deep well, firstly, sampling the geological stratification of the deep well, forming the permeability hole on the metal electrode according to the sampling result of the geological stratification, and enabling the position of the permeability hole on the metal electrode which is put in the deep well to be corresponding to the position of the geological stratification with a rock section. In the process of on-site construction, the invention can use the resistance reducing material to fill the geological section stratification in the karst area, thereby improving the conductingproperty of the geology around the metal electrode, achieving the requirement of the resistance value of a substation grounding network, and obtaining the advantages of simple structure and operation, low cost and the like.

Description

technical field [0001] The invention relates to a structure of a lightning protection grounding grid and a manufacturing method thereof, in particular to a structure of a lightning protection grounding grid in a karst area and a manufacturing method thereof. Background technique [0002] my country's requirements for the design of the original ground network of substations stipulate that the resistance value of the substation ground network must be limited to less than or equal to 0.5 ohms. However, when the geology and soil conditions of the geographical location where the substation is located are different, the variation range of the resistivity will also be quite different. The latter will affect the resistivity due to rock faults in the geology. At the same time, because the lightning protection grounding grid is mostly constructed on site, in this environment where the resistance value is uncertain, the method of enlarging the area of ​​the grounding grid is now mostl...

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Problems solved by technology

However, when the geology and soil conditions of the geographical location where the substation is located are different, the variation range of the resistivity will also be quite different. The latter will affect the resistivity due to rock faults in the geology

At the same time, because the lightning protection grounding grid is mostly constructed on site, in this environment where the resistance value is uncertain, the method of enlarging the area of ​​the grounding grid is now mostly used. It is difficult to estimate the change of resistance value, and it is difficult to reduce the resistance value of the ground grid to the range specified in the regulations

The other is to change the geological resistance, such as a grounding module that uses copper pipes as the main body, adds electrolyte inside, releases the electrolyte through the drain hole, and actively adjusts the resistivity of the surrounding soil. It not only considers anti-corrosion but also has good resistance reduction As a result, it is indeed a better grounding material, but this method first has a higher price; second, because there are many rock sections in karst areas, the electrolyte in the copper pipe is limited and cannot be connected when encountering geological sections in karst areas , formed faults and failed to achieve the expected effect, unable to adapt to meet the needs of karst areas

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