Damage to Large scale buried pipeline by the 2011 off the Pacific coast of Tohoku Earthquake

• MOHRI Yoshiyuki

  Department of Facility Engineering, National Institute for Rural Engineering

• ARIYOSHI Mitsuru

  Department of Facility Engineering, National Institute for Rural Engineering

• KAWABATA Toshinori

  Department of Agricultural and Environmental Engineering, Graduate School of Agriculture Science, Kobe University

Bibliographic Information

Other Title

• 大口径パイプラインの地震被害
• - State of damage and Reconstruction work -
• —被害状況と復旧の考え方—

Abstract

Destruction of a number of pipes was caused by the liquefaction at the time of the Tohoku Earthquake of 2011. Large diameter pipeline ranging from 1500mm to 2600mm was placed in Fukushima Prefecture, Kumado district. The behavior of a buried pipeline during an earthquake was greatly affected by mechanical characteristics of backfill soil. Damaged length extends for 3 kilometers among the total length of 17.8 kilometers was need reconstruction. The damage was characterized by 1m floating up of pipe, surfacing and displacement of manholes, 0.3m slipping out of pipe joints, separation of manifolds resulting from the liquefaction of the backfill sand during the earthquake. On the other hand, a pipeline installed by using crushed gravel for backfill material was small damage. It is also known that increasing the resistance to liquefaction of backfill is very effective due to decrease the damage of buried structure during the earthquake.

Journal

• Japanese Geotechnical Journal

  Japanese Geotechnical Journal 7 (1), 185-194, 2012

  The Japanese Geotechnical Society

Keywords

• Buried pipeline
• Backfill material
• Liquefaction
• Earthquake resistant measures

Details

• CRID: 1390282680234844672
• NII Article ID: 130004482878
• DOI: 10.3208/jgs.7.185
• ISSN: 18806341
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed