New mitigation method for pipeline uplift during seismic event. Issue 2 (22nd June 2016)

• Record Type: Journal Article
• Authors: Taeseri, Damoun; Laue, Jan; Otsubo, Masahide; Towhata, Ikuo
• Is Part Of: Geotechnical research. Volume 3:Issue 2(2016)
• Page Start: 54
• Page End: 64
• Publication Date: 2016-06-22
• Subjects: dynamics -- geotechnical engineering -- seismic engineering; Geotechnical engineering -- Periodicals; 624.151
• DOI: 10.1680/jgere.16.00002
• Languages: English
• ISSNs: 2052-6156

Abstract

Abstract : The Tohoku earthquake in 2011 caused several damages to the pipeline network in the Tokyo Bay area. Predominantly, the main damages were noticed in the artificial islands, where liquefaction destroyed and deformed numerous embedded pipelines. During a seismic event, lifeline systems are subjected to buoyancy forces in the liquefied soil, causing permanent deformations to pipelines and interrupting their serviceability. The current mitigation methods (backfill improvement) are not suitable for regions prone to future earthquakes because pipe excavation and improvement is time-consuming and costly. Therefore, the aim of this study is to present a new effective mitigation method: the so-called horn-type structure. This innovative mitigation method was analysed with different analytical, experimental and numerical methods.