Behavior of lattice-type ground improvement by cement-mixing for liquefaction mitigation

Junichi Koseki, Tsutomu Namikawa

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

3-D FE analyses were conducted on lattice-type ground improvement by in-situ cement-mixing for liquefaction mitigation during earthquakes. By using an elasto-plastic model considering post-peak strain-softening properties in shear and tensile regions, seismic performance could be evaluated more rationally. Since tensile behavior of cement-treated sand was the key issue for the seismic performance of the lattice-type ground improvement, different types of laboratory tests and their numerical simulation were also performed. It was revealed that unconfined tension tests yield reasonable estimates of the actual tensile strength. Due to effects of shear failure below the loading strip, the tensile strength is underestimated in splitting tests. On the other hand, due to effects of stress re-distribution that is induced by the strain-softening behavior in the tensile region, the tensile strength is overestimated in bending tests.

本文言語English
ホスト出版物のタイトルGeotechnical Society of Singapore - International Symposium on Ground Improvement Technologies and Case Histories, ISGI'09
ページ257-262
ページ数6
DOI
出版ステータスPublished - 2010
外部発表はい
イベントInternational Symposium on Ground Improvement Technologies and Case Histories, ISGI'09 - Singapore, Singapore
継続期間: 2009 12 92009 12 12

出版物シリーズ

名前Geotechnical Society of Singapore - International Symposium on Ground Improvement Technologies and Case Histories, ISGI'09

Conference

ConferenceInternational Symposium on Ground Improvement Technologies and Case Histories, ISGI'09
国/地域Singapore
CitySingapore
Period09/12/909/12/12

ASJC Scopus subject areas

  • 地盤工学および土木地質学

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