Open AccessApplication of high density electricity method in detection of concealed water conveyance tunnel
Author(s) -
Bin Du,
Lonjin Ge,
Zheng Xu,
Junjie Li
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/585/1/012172
Subject(s) - inversion (geology) , electrical resistivity and conductivity , high resolution , electricity , geology , horizontal resolution , geotechnical engineering , remote sensing , electrical engineering , engineering , geomorphology , climatology , structural basin
We used the high density electricity method to detect underground water conveyance tunnel in a project, then we compared the difference of apparent resistivity profiles between Schlumberger device and Winner device. Lastly, we analyzed the difference between the combined inversion method and the Levenberg-Marquardt method in Res2dinv software, and inferred the trend and depth of underground water tunnel through the results of electrical detection. Several conclusions are drawn as follows. Firstly, the resistivity anomaly of underground tubular object is more prominent in Schlumberger device than in Winner device. Secondly, the Levenberg-Marquardt inversion method which contained in Res2dinv software can easily conceal the horizontal resistivity variation characteristics of small-scale tubular anomalous body and the horizontal resolution of the original apparent resistivity profile is higher than that of the inversion result. Thirdly, the combined inversion method can improve the horizontal resolution of resistivity method for detecting tubular anomalous body with larger burial depth and smaller scale.