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

Junichi Koseki, Tsutomu Namikawa

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

Abstract

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.

Original languageEnglish
Title of host publicationGeotechnical Society of Singapore - International Symposium on Ground Improvement Technologies and Case Histories, ISGI'09
Pages257-262
Number of pages6
DOIs
Publication statusPublished - 2010
Externally publishedYes
EventInternational Symposium on Ground Improvement Technologies and Case Histories, ISGI'09 - Singapore
Duration: 2009 Dec 92009 Dec 12

Other

OtherInternational Symposium on Ground Improvement Technologies and Case Histories, ISGI'09
CitySingapore
Period09/12/909/12/12

Fingerprint

ground improvement
Liquefaction
tensile strength
liquefaction
Cements
cement
Tensile strength
mitigation
softening
Bending tests
Earthquakes
Sand
plastic
Plastics
earthquake
sand
Computer simulation
simulation
test
effect

Keywords

  • Cement-mixing
  • Lattice-type improvement
  • Tensile property

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

Cite this

Koseki, J., & Namikawa, T. (2010). Behavior of lattice-type ground improvement by cement-mixing for liquefaction mitigation. In Geotechnical Society of Singapore - International Symposium on Ground Improvement Technologies and Case Histories, ISGI'09 (pp. 257-262) https://doi.org/10.3850/GI081

Behavior of lattice-type ground improvement by cement-mixing for liquefaction mitigation. / Koseki, Junichi; Namikawa, Tsutomu.

Geotechnical Society of Singapore - International Symposium on Ground Improvement Technologies and Case Histories, ISGI'09. 2010. p. 257-262.

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

Koseki, J & Namikawa, T 2010, Behavior of lattice-type ground improvement by cement-mixing for liquefaction mitigation. in Geotechnical Society of Singapore - International Symposium on Ground Improvement Technologies and Case Histories, ISGI'09. pp. 257-262, International Symposium on Ground Improvement Technologies and Case Histories, ISGI'09, Singapore, 09/12/9. https://doi.org/10.3850/GI081
Koseki J, Namikawa T. Behavior of lattice-type ground improvement by cement-mixing for liquefaction mitigation. In Geotechnical Society of Singapore - International Symposium on Ground Improvement Technologies and Case Histories, ISGI'09. 2010. p. 257-262 https://doi.org/10.3850/GI081
Koseki, Junichi ; Namikawa, Tsutomu. / Behavior of lattice-type ground improvement by cement-mixing for liquefaction mitigation. Geotechnical Society of Singapore - International Symposium on Ground Improvement Technologies and Case Histories, ISGI'09. 2010. pp. 257-262
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