Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)

Korean Geotechnical Society (한국지반공학회)
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Effect of Pile Driving on Three Layered Pipeline according to Soil Properties Variation

지반 물성값에 따른 항타 진동이 지중 삼중관에 미치는 거동 분석

  • Yoo, Han-Kyu (Dept. of Civil and Environmental Engineering, Hanyang University) ;
  • Choi, Joung-Hyun (Dept. of Civil and Environmental Engineering, Hanyang University) ;
  • Won, Jong-Hwa (Dept. of Civil Engineering, Yonsei University) ;
  • Kim, Moon-Kyum (Dept. of Civil and Environmental Engineering, Yonsei University)
  • 유한규 (한양대학교 공학대학 건설환경공학과) ;
  • 최정현 (한양대학교 공학대학 건설환경공학과) ;
  • 원종화 (연세대학교 공학대학 토목공학과) ;
  • 김문겸 (연세대학교 공학대학 토목환경공학과)
  • Published : 2010.03.25
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Abstract

In this study, the behavior of underground pipeline subjected to pile driving is examined using the verified finite element model based on the field experiment. Young's modules of surface soil is varied and elastic modulus of the other soil layer is fixed. The pile driving force model proposed by Mounir E. Mabsout in 1999 was used and it was functions of time and of force. The forcing function applied on this study considers the kinetic energy of ram located at 1.2m height with 7 tonf. The 3-layered pipeline is composed of steel(inner) pipe, PUR(Polyurethane Resin, filler) and HDPE(outer) pipe, and the length/diameter of main steel pipe is 20m/0.8m(O.D). It is used for district heating pipes in Korea. The results are expressed in terms of Von Mises stress, displacement, and vibration velocity for each soil condition. From the results of the analyses, PUR which is originally intended as a thermal insulation of inner pipe shows performance as a structural member which distributes external pressure.

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