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2014 Vol.16, Issue 5 Preview Page
Development of acoustic emission monitoring system for the safety of geotechnical structures

지반구조물 안전감시용 미소파괴음 계측시스템 개발

D.S. Cheon1
,
Y.B. Jung1*
,
E.S. Park1
천 대성1
,
정 용복1*
,
박 의섭1
1Korea Institute of Geoscience and Mineral Resources
1한국지질자원연구원
*교신저자. *Corresponding Author. 
30 September 2014. pp. 471-485
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Abstract

The monitoring method of geotechnical structures using acoustic emission(AE) and microseismicity(MS) is to detect the microscopic deformation and fracture behavior in the inner structures by measuring induced acoustics and vibrations. It can identify a pre-indication of failure by taking advantage of the characteristics that the amount and occurrence rates of AE and MS increase rapidly prior to large scale destruction of the target structures. The monitoring system consisting of high-quality sensors, high-speed data acquisition device and the operation program is required for the practical application of this method. Recently, the AE and MS monitoring systems have been localized. In particular, the developed operation software which can analyze and interpret the measured signals was demonstrated through a number of applications to domestic fields. This report introduces the configuration and features of developed monitoring system, then the challenges and future direction of AE monitoring in geotechnical structures are discussed.

Keywords
Acoustic emission
Microseismic
Monitoring
Operation software
Early warning

미소파괴음과 미소진동을 이용한 지반구조물 계측은 구조물 내부의 미시적 변형이나 파괴거동을 음향과 진동으로 계측하는 방법으로, 계측대상의 대규모 파괴에 앞서 이들의 발생량과 발생빈도가 급격히 증가하는 특성을 활용하여 파괴의 사전징후를 파악할 수 있다. 이 방법의 실제 적용을 위해서는 고사양의 센서, 고속의 신호획득장치 그리고 운영프로그램으로 구성된 계측시스템이 요구된다. 근래 국내기술에 의한 현장계측용 미소파괴음과 미소진동 계측시스템이 개발되었다. 특히 계측된 신호를 분석하고 해석할 수 있는 다양한 기능의 운영프로그램을 개발하고 선진외국 제품과의 상호비교를 통해 효용성을 평가하였다. 본 보고에서는 개발된 미소파괴음 계측시스템의 구성과 특징 등에 대해 소개하고, 향후 해결과제와 나아갈 방향에 대하여 논의하였다.

키워드
미소파괴음
미소진동
계측
운영프로그램
조기경보
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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 : 16
  • No :5
  • Pages :471-485
  • Received Date : 2014-08-29
  • Revised Date : 2014-09-16
  • Accepted Date : 2014-09-18
  • DOI :https://doi.org/10.9711/KTAJ.2014.16.5.471
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