Effect of Partial Drainage on Optimized Parameters Based on Deformations of a Deep Supported Excavation

Sangrae Kim*, Richard J. Finno

*Corresponding author for this work

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

Abstract

This paper summarizes the inverse analyses that explicitly considered hydrodynamic time effects and the results of such optimizations for the supported excavation for the Simpson Querry Biomedical Research Center (SQBRC) in Chicago. To evaluate hydrodynamic effects arising from pore pressure dissipation, consolidation stages were included in finite element simulations of the excavation to explicitly model the time effects. Both stiffness parameters and hydraulic conductivity were computed based on optimization using the lateral wall movements during excavation. The resulting optimized parameters considering the time effect are compared with those using only undrained construction stages to assess the changes in parameter values that arise from explicitly considering the time effects. Conclusions are drawn with respect to the applicability of the conventional undrained assumption for excavations through clay.

Original languageEnglish (US)
Title of host publicationGeotechnical Special Publication
EditorsT. Matthew Evans, Nina Stark, Susan Chang
PublisherAmerican Society of Civil Engineers (ASCE)
Pages305-314
Number of pages10
EditionGSP 350
ISBN (Electronic)9780784485309, 9780784485316, 9780784485323, 9780784485330, 9780784485347, 9780784485354
StatePublished - 2024
EventGeo-Congress 2024: Foundations, Retaining Structures, Geosynthetics, and Underground Engineering - Vancouver, Canada
Duration: Feb 25 2024Feb 28 2024

Publication series

NameGeotechnical Special Publication
NumberGSP 350
Volume2024-February
ISSN (Print)0895-0563

Conference

ConferenceGeo-Congress 2024: Foundations, Retaining Structures, Geosynthetics, and Underground Engineering
Country/TerritoryCanada
CityVancouver
Period2/25/242/28/24

Funding

The funding for the work reported herein was provided by a National Science Foundation grant CMMI-1603060. The support of Dr. Richard Fragaszy is greatly appreciated. Hayward Baker, Inc. was the excavation support subcontractor and provided much assistance throughout the project.

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology

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