DC deep well ground electrode (DWGE) can solve the site selection problem faced by traditional ground electrodes

but the gas generated by electrolysis is difficult to discharge

and the bubble resistance effect (BRE) can lead to the deterioration of current dispersion and heat dissipation performance. At present

the mechanism and influence law of BRE on the performance of DWGE are not yet clear. This article analyzes the physical mechanism of the three stages of “gas evolution - gas migration-BRE” of DWGE

and it is believed that BRE affects the performance of DWGE through soil electrical and thermal parameters. An experimental platform is built to simulate the influence of gas evolution and migration on the potential and temperature rise distribution near the electrode under flow conditions. Experiments are carried out in soil with initial saturated water content under a typical current density of 5 A/m2 anode and cathode operation

and the influence of BRE on soil resistivity and temperature rise near the electrode is obtained. The results indicate that soil resistivity is affected by gas and ions generated by electrolysis

as well as the accumulation of charged ions caused by electromigration

showing an increasing and then decreasing trend over time

with the affected spatial range expanding. There is a significant difference in the impact of BRE on dispersion performance between anode and cathode conditions. Under the 5 A/m2 anode condition

the maximum increase in soil resistivity near the electrode can reach 197.6%

while under the cathode condition

it is only 5.8%.