【摘要】 用瞬变电磁测深 (TEM )和大地电磁测深 (MT)两种方法测量了三峡直流输电工程中接地极址的地下电性分布 ,将TEM资料通过时频转换 ,转换成频率域的视电阻率曲线 ,它与MT的视电阻率曲线对接后 ,再经过反演可以得到极址下方由浅层到深层的电阻率断面图 ,该断面图为接地极址的设计和建设提供了可靠而又必要的电性参数依据更多还原

【Abstract】 The ground electrical distribution of earthed pole in direct current power transmission of Three Gorges Project is measured by using transient electromagnetic method (TEM) and magnetotelluric method (MT). Data from TEM are converted into apparent resistivity curves of frequency domain by using time-frequency transmission, after it is jointed end by end with the apparent resistivity from MT, a resistivity profile below the earthed pole is obtained by inversion, by which reliable and necessary references are provided for designing and building the earthed pole.更多还原