Study on Ground Dispersion Characteristics and Resistance Reduction of Transmission Line Large Excavation Foundation at Groundwater Layer

Transmission line tower foundation is an important condition to maintain the stability of the whole transmission line tower structure, and the large excavation foundation is a common type of foundation in the construction of transmission line tower. Therefore, according to the geological and structural characteristics of groundwater-bearing layer, this paper researches and analyzes the ground dispersion characteristics and influencing factors of large excavation foundation containing groundwater layer, and proposes the grounding and resistance reduction scheme along the surface pit. Firstly, study the grounding and flow characteristics of large excavation foundations with groundwater layers, and compare them with those without groundwater layers. Secondly, the effects of aquifer location, aquifer soil resistivity and surface soil resistivity on the ground dispersion characteristics of large excavation foundations containing aquifers are studied and analyzed. Propose and study different characteristics of grounding and resistance reduction schemes for external excavation along the surface. Research has shown that the presence of groundwater reduces the grounding resistance of towers, and factors such as the location of the aquifer have a direct impact on the grounding and dissipation characteristics of large excavation pile foundations; The grounding scheme along the surface of the foundation pit has a good resistance reduction effect.