GEO5欧美标准铁塔独立基础不均匀沉降限值依据
（1）欧标
根据EN 50341-1《Overhead electrical lines exceeding AC 45 kV Part 1: General requirements -Common specifications》8.5.2.3 Displacements：
根据BS IEC 60826:2017《Overhead transmission lines —Design criteria》7.3节：
（2）美标
依据《Structural Standard for Antenna Supporting Structures and Antennas and Small Wind Turbi》
