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(사)한국터널지하공간학회

ISSN : 2233-8292

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Vol.11 No.4

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Time-lapse inversion of resistivity tomography monitoring data around a tunnel

(사)한국터널지하공간학회 / (사)한국터널지하공간학회, (P)2233-8292; (E)2287-4747
2009, v.11 no.4, pp.361-371



& (2009). Time-lapse inversion of resistivity tomography monitoring data around a tunnel. (사)한국터널지하공간학회, 11(4), 361-371.

Abstract

Resistivity tomography is very effective geophysical method to find out the resistivity distribution and its change in time around a tunnel. Thus, the resistivity tomogram can provide helpful information which is necessary for the effective maintenance of the tunnel. However, an air filled tunnel severely distorts tomography data, especially when the current or potential electrode is placed near the tunnel. Moreover, the distortion can often lead to misinterpretation of tomography monitoring data. To solve these problem, we developed a resistivity modeling and time-lapse inversion program which include a tunnel. In this study, using the developed program we assured that the inversion including a tunnel gives much more accurate image around a tunnel, compared with the conventional tomogram where the tunnel is not included. We also confirmed that the time-lapse inversion of resistivity monitoring data defines well resistivity changed areas around a tunnel in time.

keywords
Resistivity tomography, tunnel, time-lapse inversion, monitoring, 전기비저항 토모그래피, 터널, 시간경과역산, 모니터링

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