Construction method for underground grounded screen

Abstract

The invention relates to a subway grounding grid construction method, which comprises the following steps: the accurate positions for the installation of a horizontal grounding body and a vertical grounding body are determined; ditches are excavated; the horizontal and the vertical grounding bodies are produced and installed; grounding outlet wires are installed; the ditches are backfilled and tamped; in the process of the production and installation of the horizontal grounding body and the vertical grounding body, both the horizontal grounding bodies and the horizontal grounding body and thevertical grounding body are connected by heat release weld that is improved; the horizontal grounding body uses copper bars; the vertical grounding body uses copper tubes; the grounding grid groundingoutlet wires use the copper bars. The subway grounding grid construction method has the advantages of high construction efficiency and excellent welding quality, fully guaranteeing the quality of a subway grounding grid project, and effectively preventing the phenomenon of the theft of grounding outlet wires after the installation method of the subway grounding grid grounding outlet wires is improved.

Description

technical field [0001] The invention belongs to the field of subway construction, and in particular relates to a method for constructing a subway grounding grid. Background technique [0002] At present, grounding in construction projects is generally divided into working grounding, protective grounding, lightning protection grounding, and anti-static grounding. The construction of subway grounding grids belongs to working grounding and protective grounding. [0003] The construction characteristics of the general subway station grounding grid are as follows: [0004] Construction materials: use galvanized flat steel, angle steel, etc., whose physical and chemical properties such as electrical conductivity, thermal conductivity, corrosion resistance and ductility need to be improved; [0005] Construction method: arc welding is adopted, and the tools used for arc welding are electric welding machine, welding rod, welding torch, etc., which require an external power supply, ...

AI Technical Summary

Problems solved by technology

[0005] Construction method: arc welding is adopted, and the tools used for arc welding are electric welding machine, welding rod, welding torch, etc., which require an external power supply, the operation is complicated, and the welding quality is not guaranteed; the grounding lead wire of the subway grounding grid is often stolen during the construction process due to the exposed copper bars;

[0006] Construction mode: There are many subway stations, long front lines, scattered work locations, construction needs to be dispatched back and forth, construction costs increase, and construction efficiency per unit time is low

Images