Analysis of cross-borehole pulse radar signatures on a half water-filled tunnel

Author

Ji-Hyun Jung ; Se-Yun Kim

Author_Institution

Imaging Media Res. Center, Korea Inst. of Sci. & Technol., Seoul, South Korea

fYear

2013

fDate

5-8 Nov. 2013

Firstpage

473

Lastpage

475

Abstract

The effect of the water collected in the bottom of an empty tunnel on cross-borehole radar signatures is analyzed using the finite-difference time-domain (FDTD) method. The cross-borehole pulse radar is represented by 3-dimensional model and B-scan images are calculated in two cases of fully air-filled and half water-filled tunnels. The first positive peak in the B-scan image appears in a later time and moves upward direction than the tunnel center as the water is collected in tunnel. To estimate the central position of the half water-filled tunnel, the first negative peak is adopted here and its utility is described clearly.

Keywords

drilling (geotechnical); electromagnetic pulse; finite difference time-domain analysis; remote sensing by radar; tunnels; 3 dimensional model; B-scan image; FDTD method; cross borehole pulse radar signature; empty tunnel; finite difference time domain method; fully air filled tunnel; half water filled tunnel; Dipole antennas; Dispersion; Finite difference methods; Radar antennas; Radar imaging; Time-domain analysis; Cross-borehole; FDTD; pulse radar; water-filled tunnel;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings (APMC), 2013 Asia-Pacific

Conference_Location

Seoul

Type

conf

DOI

10.1109/APMC.2013.6694835

Filename

6694835