Evaluation of constitutive law applicability for the ground improvement by jet grouting

J. Kawamura, Y. Iguchi, T. Namikawa, K. Takehara, T. Yamada, S. Ohno

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Ground improvement based on the introduction of a lattice structure by jet grouting is widely adopted to prevent seismic liquefaction phenomena. Conventional design prescribes that the allowable stress of an improved body should remain within the range of elastic behavior during an earthquake, but the characteristics of phenomena associated with improved ground after earthquake-related failure remain unclear. Against this background, Namikawa and Mihira (2007) proposed an elasto-plastic constitutive law capable of expressing strain-softening/hardening response after tensile and shear failure. In the present study, the authors simulated an unconfined compression test with a previously described elasto-plastic model for large-scale core sampling of a body improved via jet grouting to verify the model’s applicability. FEM analysis was subsequently conducted to evaluate the resistance of improvement based on a lattice structure with local failure against a strong earthquake.

Original languageEnglish
Title of host publicationEarthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019
EditorsFrancesco Silvestri, Nicola Moraci
PublisherCRC Press/Balkema
Pages3242-3249
Number of pages8
ISBN (Print)9780367143282
Publication statusPublished - 2019 Jan 1
Event7th International Conference on Earthquake Geotechnical Engineering, ICEGE 2019 - Rome, Italy
Duration: 2019 Jan 172019 Jan 20

Publication series

NameEarthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019

Conference

Conference7th International Conference on Earthquake Geotechnical Engineering, ICEGE 2019
CountryItaly
CityRome
Period19/1/1719/1/20

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

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