Research on key soil and water loss characteristics and mitigation strategies for power grid projects in Jiangsu plain's water network region

Aggregate full-cycle water conservation data from 47 500-kV transmission and sub-station projects in the Jiangsu Plain Water Network Area from 2015 to 2024.Project characteristics, including project scale and disturbed soil-and-rock area, were extracted to construct a database for statistical analysis.The results show that drilled piles accounted for 87.75% of foundations, while mud generated during single-foundation excavation accounted for 53.96% of the total excavation material.Disposal was predominantly conducted through in-situ landfill (98.93%).Based on these findings, it is recommended that landfill disposal be restricted; measures for dewatering, volume reduction, and harmless treatment be implemented; resource utilisation be promoted; and whole-process supervision with clear responsibility mechanisms be established.