New mitigation method for pipelines under the effect of buoyancy forces during seismic events
2015 (English)In: Geotechnical engineering for infrastructure and development: proceedings of the XVI European Conference on Soil Mechanics and Geotechnical Engineering / [ed] M.G. Winter, London: Research Publishing Services, 2015, Vol. 4, 2213-2218 p.Conference paper (Refereed)
Lifeline systems in liquefiable soils are subjected to buoyancy forces during seismic events, causing permanent deformations to pipelines and interrupting their service (e.g. water supply, sewerage, etc.) for extended periods of time. For example, the Great East Earthquake and the Niigata Chuetsu Earthquake (Mimura et al. 2011) caused significant damage through floating of underground lifelines. Different mitigation methods, such as soil compaction, cement mixing or continuous structural measures, are currently used to reduce the liquefaction potential of the fill material. However, these methods are expensive and time consuming when considering the size of the lifelines' networks. This paper studies the "horn-type-structure" as a mitigation method, which is less expensive, more effective and faster to build for existing lifelines. One of the advantages of this method is that the horn-type-structure can be installed in strategic locations across the lifeline network only, thus reducing the overall amount of soil excavation along the entire network. Small scale experiments were conducted at the University of Tokyo and centrifuge tests were conducted at ETH-Zurich, aiming to understand the mechanism better and to develop a calculation method.
Place, publisher, year, edition, pages
London: Research Publishing Services, 2015. Vol. 4, 2213-2218 p.
Research subject Soil Mechanics
IdentifiersURN: urn:nbn:se:ltu:diva-40075ScopusID: 84964523876Local ID: f0d95bde-6753-4a61-a650-e781c87d54c6ISBN: 9780727760678OAI: oai:DiVA.org:ltu-40075DiVA: diva2:1013598
European Conference on Soil Mechanics and Geotechnical Engineering : 13/09/2015 - 17/09/2015
Upprättat; 2015; 20160715 (janlau)2016-10-032016-10-03