Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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Effect of Moisture Conditions in Soils on Mode Attenuation of Guided Waves in Buried Pipes

지반의 수분 상태에 따른 매립 배관에서의 유도초음파 모드 감쇠 변화

  • Lee, Ju-Won (Department of Ocean Engineering, Pukyong National University) ;
  • Shin, Sung-Woo (Division of Safety Engineering, Pukyong National University) ;
  • Na, Won-Bae (Department of Ocean Engineering, Pukyong National University) ;
  • Kim, Young-Sang (Division of Civil and Environmental Engineering, Chonnam National University)
  • Received : 2010.05.17
  • Accepted : 2010.07.23
  • Published : 2010.08.31
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Abstract

Recently, many techniques have been developed for the inspection of pipelines using guided waves. However, few researches have been made on the application of those techniques for buried underground pipes. Guided wave motions in the buried pipes are somewhat different from those of on-ground pipes which have traction-free (air) boundary condition on outer pipe walls and thus are strongly affected by the mechanical property of the surrounding soils. Therefore, it should be investigated the effect of soil properties on the guided wave behavior in buried pipe. On the other hand, the mechanical property of soil is largely depending on its moisture conditions nevertheless of other influential factors such as void ratio. In this study, the effect of moisture conditions in soils on mode attenuation of guided waves in the buried pipe is investigated. To this end, numerical study is performed to characterize mode attenuation behavior in buried pipes and the effective mode which is suitable for long range inspection is identified.

Keywords

References

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