Consolidation of a double-layered compressible foundation partially penetrated by deep mixed columns

Linchang Miao, Xinhui Wang, Edward Kavazanjian

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

Deep mixed columns often penetrate partially into the soft soil as floating columns due to the depth of the end-bearing layer. Partially penetrated soft soil by columns and the underlying compressible soft soil create a double-layered compressible foundation. So far, no reasonable solution is available to estimate the consolidation of such a double-layered foundation. This paper proposes an analytical solution for consolidation of a double-layered compressible foundation partially penetrated by deep mixed columns considering one-side or two-side vertical drainage The Laplace transform method was used to solve the consolidation equation for the double-layered system while Stehfest's algorithm was used to solve the inverse Laplace transform for time-dependent loading. A consolidation algorithm was used to calculate the time-settlement relationship of an embankment constructed upon the double-layered foundation partially penetrated by deep mixed columns. The calculated settlements were compared well with field measurements.

Original languageEnglish (US)
Pages (from-to)1210-1214
Number of pages5
JournalJournal of Geotechnical and Geoenvironmental Engineering
Volume134
Issue number8
DOIs
StatePublished - Aug 2008

Keywords

  • Clays
  • Columns
  • Consolidation
  • Foundations
  • Soft soils

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Environmental Science(all)

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