Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Prediction for Measurement Range of Vibration due to Blasting of Underground Tunneling

발파 진동으로 인한 지표면 진동 계측 범위 산정에 대한 연구

  • Kong, Suk-Min (Dept. of Geotechnical Engrg. Research, Korea Institute of Civil Engrg. and Building Technology ) ;
  • Byun, Yoseph (Dept. of Geotechnical Engrg. Research, Korea Institute of Civil Engrg. and Building Technology) ;
  • Choi, Sang-Il (Dept. of Geotechnical Engrg. Research, Korea Institute of Civil Engrg. and Building Technology) ;
  • Kim, Jeong-Heum (Dept. of Geotechnical Engrg. Research, Korea Institute of Civil Engrg. and Building Technology ) ;
  • Kim, Chang-Yong (Dept. of Geotechnical Engrg. Research, Korea Institute of Civil Engrg. and Building Technology) ;
  • Lee, Seong-Won (Dept. of Geotechnical Engrg. Research, Korea Institute of Civil Engrg. and Building Technology)
  • Received : 2023.11.15
  • Accepted : 2024.04.16
  • Published : 2024.04.30
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Abstract

Vibrations were measured at the surface of a GTX-A site to assess the impact of blasting on underground tunneling. A numerical analysis was conducted using the same ground and blast conditions as those at the site, accompanied by a comparative analysis of other GTX-A sites. This analysis determined the maximum vibration velocity at regular intervals directly above the blasting point at each site. The results were compared with domestic and international vibration standards to establish the vibration measurement range. The specified vibration measurement locations in domestic regulations—"measuring from the closest part of the structure's foundation to the blasting source, and if conditions make it impossible, measuring from the nearest surface to it"—were evaluated. Furthermore, this study underscores the significance of considering the tunnel drilling depth and soil conditions when selecting a vibration measurement location.

지하터널 굴착 시 발파로 인한 진동의 영향이 지표면에 미치는 영향을 분석하기 위해 GTX-A 굴착현장 상부에서 진동을 측정하였다. 또한 해당 현장과 동일한 지반조건 및 발파조건으로 역해석을 실시하였으며, 이를 바탕으로 다른 GTX-A 노선 현장들에 대해서 수치해석을 실시하여 비교·분석하였다. 수치해석을 통해 각 현장의 발파지점 직상부로 부터 일정 간격으로 최대 진동속도를 도출하였으며, 결과 값을 국내·외 진동 허용기준과 비교하여 진동 계측의 영향 범위를 산정하였다. 이를 통해 국내 규정에서 "발파원으로부터 가장 근접한 구조물 기초 부위에서 측정하고 여건상 불가능한 경우 이에 근접한 지표에서 측정"으로 명시되어 있는 지반진동 측정 위치에 대해 보다 명확한 진동 계측 위치를 산정하였다.

Keywords

Acknowledgement

본 연구는 국토교통과학기술진흥원의 지원(과제명: 도심 지하 교통 인프라 건설 및 운영 기술 고도화 연구, 과제번호: 22UUTI-C157788-03)으로 수행되었습니다. 이에 감사드립니다.

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