Numerical modeling of deep soil mixing excavation support

Cassandra J. Rutherford, Giovanna Biscontin, Demetrious Koutsoftas, Jean Louis Briaud

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


The finite element method (FEM) is growing in popularity over the pressure diagram/hand calculation method for analysis of excavation systems in general and deep soil mixing excavations in particular. In this paper, a finite element analysis is used to study the behavior of a deep mixed excavation. Through the use of Plaxis (a FEM software program), the construction sequence is simulated by following the various construction phases allowing for deflections due to strut or anchor installation to be predicted. The numerical model used in this study simulates the soil cement columns as a continuous wall matching the bending stiffness of the actual wall. Input parameters based on laboratory tests and modeling assumptions are discussed. An example of the approach is illustrated using the Islais Creek Transport/Storage Project in San Francisco, California. Copyright ASCE 2006.

Original languageEnglish (US)
Title of host publicationGeoCongress 2006
Subtitle of host publicationGeotechnical Engineering in the Information Technology Age
Number of pages1
StatePublished - 2006
Externally publishedYes
EventGeoCongress 2006 - Atlanta, GA, United States
Duration: Feb 26 2006Mar 1 2006

Publication series

NameGeoCongress 2006: Geotechnical Engineering in the Information Technology Age


OtherGeoCongress 2006
Country/TerritoryUnited States
CityAtlanta, GA

ASJC Scopus subject areas

  • General Engineering


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