NanoTEM applications in shallow stratigraphic layering
QIN Suyuan
WANG Lei
Abstract：The author used the nanotransient electromagnetic method(NanoTEM)to detect and study the distribution of soil and pebble layers within 40m of the underlying stratum of the Nanming River Ⅱ Bridge.It shows that this method maintains the fast and efficient performance of the transient electromagnetic method(TEM).Advantages:The detection blind zone is only a few meters,and it can detect the electrical information of ultra-shallow layers within 100m.However,it is seriously affected by electromagnetic noise.During the interpretation process,it is necessary to combine geology,hydrology,geophysical prospecting,drilling,and comprehensive comparison.interpretation to improve interpretation accuracy.The successful application of the engineering example completed the geological task,basically ascertained the thickness and depth of the soil layer and pebble layer within 60m,and carried out stratigraphic layering,which provided geological basis for later engineering design and construction.
Keywords：Nano transient electromagnetic method(NanoTEM)transient electromagnetic method(TEM)sampling time distributionapparent resistivity
Publication Date：2024-11-28
Online Publishing Date：2025-12-24(First online date of this platform, not the publication date of the document)
Pages：4( 162-165 )