Application of audio magnetotelluric method in tunnel advanced detection—Taking Tianheshan tunnel of Hexing Railway as an Example

The geological disasters such as collapse, mud bursting and water gushing often occur during tunnel construction. Thus, it is of great significance to detect the hidden geological disasters in front of the tunnel. The audio magnetotelluric (AMT) was applied for the advanced detectionstudy during the...

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Vydané v:Applied geophysics Ročník 22; číslo 3; s. 835 - 847
Hlavný autor: Zhao, Yuan-cheng
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Berlin/Heidelberg Springer Berlin Heidelberg 01.09.2025
Springer Nature B.V
Predmet:
Anomalies
Construction
Disasters
Earth and Environmental Science
Earth Sciences
Electrical resistivity
Fault lines
Fracture zones
Fragmentation
Geoelectricity
Geology
Geophysics
Geophysics/Geodesy
Geotechnical Engineering & Applied Earth Sciences
Low resistance
Magnetotelluric methods
Mountains
Plate tectonics
Railroads
Railway tunnels
Stone
Stratigraphy
Tectonics
Tunnel construction
Tunnels
AMT
fault
advanced detection
Taihangshan
Tianheshan tunnel
2D and 3D inversion
ISSN:1672-7975, 1993-0658
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Shrnutí:The geological disasters such as collapse, mud bursting and water gushing often occur during tunnel construction. Thus, it is of great significance to detect the hidden geological disasters in front of the tunnel. The audio magnetotelluric (AMT) was applied for the advanced detectionstudy during the boring process of the Tianheshan tunnel in the Taihang Mountains. Three AMT profiles were deployed above the tunnel, and the data obtained in the field were analysed in terms of electrical principal axes. From shallow to deep, the direction of the geoelectric strike angle changes, generally between 30° and 60° NE, which is consistent with similar to the direction of the Taihangshan Uplift, and the data show some 3D characteristics. Two-dimensional(2D) and three-dimensional(3D) inversion methods were adopted to jointly study the subsurface structural information, and the resistivity model was geophysically and geologically interpreted. Two sets of low resistance anomalies were found, and it was hypothesised that the near-erect low-resistivity anomalies in the east might be a fragmentation zone, while the low resistance anomalies in the west, which are inclined to the westward, might be a tectonic structure or fragmentation zone related to the regional major fault, and the results of the tunnelling confirmed the reliability of the inversion interpretation. The 3D inversion can fully reflect the development scale and morphological changes of the fracture zone, and the inversion model is more reliable. Finally, it is concluded that the audio magnetotelluric method, which adopts advanced acquisition, processing and inversion interpretation techniques, is an effective means of over-detection of tunnels.
Bibliografia:ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 14
ISSN:1672-7975
1993-0658
DOI:10.1007/s11770-025-1184-1