TITLE:
Application Test of Anti-Interference Electrical Method Instrument to Urban Geophysical Prospecting in Tongzhou, Beijing
AUTHORS:
Yonghui Su, Songwei Guo, Dawei Li, Yang Liu
KEYWORDS:
Inversion of Minimum Layers Newton Variable Method, Vertical Projection Algorithm, Zhangjiawan Fault, Yaoxinzhuang Fault, Karst Collapse
JOURNAL NAME:
International Journal of Geosciences,
Vol.12 No.4,
April
30,
2021
ABSTRACT: With the rapid
development of the city, it is necessary to obtain
geological information within 500 meters. Electrical prospecting is not only
low cost and simple operation, but also solves the problem of insufficient
drilling density in a survey.
However, due to the dense urban buildings and strong electromagnetic
interference, it is difficult for traditional electrical instruments to obtain
effective data. An anti-interference
electrical method instrument is designed. In the application test of Tongzhou core area in Beijing, the resistivity sounding data
collected by anti-interference electrical method instrument is stable and reliable; inversion results of sounding are basically
consistent with borehole data; the known Zhangjiawan fault and
Yaoxinzhuang fault are obvious; basement karst collapse area inferred is
basically coincident with the historical collapse area. It is proved that the
anti-interference electrical method instrument is effective and can be applied to the geological survey of
underground space in other cities.