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Effect of Moisture Conditions in Soils on Mode Attenuation of Guided Waves in Buried Pipes  

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)
Publication Information
Journal of the Korean Society of Safety / v.25, no.4, 2010 , pp. 42-47 More about this Journal
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
nondestructive inspection of buried pipes; guided wave; mode attenuation; soil conditions;
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1 Adamo, F., Attivissimo, F., Fabbiano, L., Giaquinto, N., Spadavecchia, M., "Soil Moisture Assessment by Means of Compressional and Shear Wave Velocities: Theoretical Analysis and Experimental Setup", Measurement, Vol. 43(3), pp. 344-352, 2010.   DOI   ScienceOn
2 Long, R., Cawley, P., Lowe, M.J.S., "Acoustic Wave Propagation in Buried Iron Water Pipes", Proceedings of the Royal Society A, Vol. 459 (2039), pp. 2749- 2770,2003.   DOI   ScienceOn
3 Pavlakovic, B., Lowe, M.J.S., DISPERSE USER MANUAL : A system for generating dispersion curves, Department of Mechanical Engineering, Imperial College, University of London, 2003.
4 ANSI/API Spec 5L : Specification for Line Pipe, American Petroleum Institute, 2007.
5 Lowe, M.J.S. "Matrix Technique for Modelling Ultrasonic Waves in Multilayered Media", IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, Vol. 42(4), pp. 525-542, 1995.   DOI
6 Monahan, E.J., Construction of Fills : 2nd Edition, John Wiley and Sons, 1994.
7 Lowe, M.J.S., Alleyne, D., Cawley, P., "Defect Detection in Pipes Using Guided Waves", Ultrasonics, Vol. 36(1), pp. 147-154, 1997.
8 Kwon, H., Kim, S.Y., Choi, M.S., Walker, S.M., "Torsional guided-wave attenuation in coal-tar-enamelcoated, buried piping", NDT & E International, Vol. 37, No. 8,pp. 663-665,2004.   DOI   ScienceOn
9 Demma, A., Alleyne, D., Pavlakovic, B., "Testing of Buried Pipelines Using Guided Waves", Proceedings of 3rd Middle East Nondestructive Testing Conference and Exhibition, 27-30 Nov. 2005, Bahrain, Manama, 2005.
10 Na, W.B., Yoon, H.S., "Wave-attenuation Estimation in Fluid-Filled Steel Pipes : The First Longitudinal Guided Wave Mode", Russian Journal of Non des tructive Testing, Vol. 43, No.8, pp. 549-554, 2007.   DOI   ScienceOn
11 Rose, J.L., "A Baseline and Vision of Ultrasonic Guided Wave Inspection Potential", Journal of Pressure Vessel Technology, Vol. 124, No.3, pp. 273-283, 2002.   DOI   ScienceOn
12 Rose, J.L., Ultrasonic Waves in Soild Media, Cambridge University Press, 2004.