Numerical simulation study on applicability of electrical resistivity survey at tunnel face

Myeong-Jong Yi; Nag-Young Kim; Sangrae Lee; Bumsik Hwang; Myung Jin Ha; Ki-Seog Kim; In-Ky Cho; Kang-Hyun Lee

doi:10.9711/KTAJ.2022.24.3.279

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2022 Vol.24, Issue 3 Preview Page Next Page

Research Paper

Numerical simulation study on applicability of electrical resistivity survey at tunnel face 터널 굴착면에서의 전기비저항 탐사 적용성에 관한 수치해석 연구

31 May 2022. pp. 279-292

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Abstract

Unexpected anomalies in the geotechnical investigation at design stage may cause problems during tunnel excavation. Therefore, it is important to predict the ground condition ahead of a tunnel face during tunnel excavation in order to prevent tunnel collapse. Despite the fulfillment of an electrical resistivity survey at the tunnel face, the existing electrical resistivity survey program can produce distorted results by the limitation of tunnel modelling. In this background, this study develops a modelling program for an electrical resistivity survey considering the tunnel shape. Numerical simulation and inverse calculation were performed for the electrical resistivity survey in the tunnel using the developed program. As a result, it was proved that the developed program could predict accurately the anomalous object’s location and condition ahead of the tunnel face.

Keywords

Electrical resistivity survey

Tunnel

설계 단계의 지반조사에서 예측되지 않은 이상대는 터널 시공 중 많은 문제를 발생시킬 수 있다. 따라서 터널의 붕괴 예방을 위해 터널 시공 중 굴착면 전방의 지질상태를 예측하는 것은 매우 중요하다. 터널 굴착면에서 전기비저항 탐사를 하더라도, 기존의 전기비저항 탐사 프로그램들은 터널을 모델링하지 못하기 때문에 왜곡된 결과를 얻을 수 있다. 따라서 본 연구에서는 터널의 형태를 고려할 수 있는 전기비저항 모델링 프로그램을 개발하였다. 개발된 프로그램을 이용하여 터널에서 전기비저항 탐사에 대한 수치모델링 및 역산을 수행하였다. 그 결과, 굴착면 전방의 이상체의 위치 및 상태를 잘 예측하는 것으로 나타났다.

키워드

전기비저항 탐사

터널

References

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Information

Publisher :Korean Tunneling and Underground Space Association
Publisher(Ko) :한국터널지하공간학회
Journal Title :Journal of Korean Tunnelling and Underground Space Association
Journal Title(Ko) :한국터널지하공간학회 논문집
Volume : 24
No :3
Pages :279-292
Received Date : 2022-04-07
Revised Date : 2022-05-19
Accepted Date : 2022-05-20
DOI :https://doi.org/10.9711/KTAJ.2022.24.3.279

Journal of Korean Tunnelling and Underground Space Association ISSN:2233-8292(Print) 2287-4747(Online) 한국터널지하공간학회 논문집

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