Case Studies of PSDDF for Phased Placement of Dredged Soils

Dongseop Lee, Sangwoo Park, Timothy D. Stark, Younguk Kim, Hangseok Choi

Research output: Contribution to journalArticle

Abstract

Use of Terzaghi's one-dimensional consolidation theory is not suitable for consolidation of highly deformable soft clays such as dredged soils. To model this condition, it is necessary to consider non-linear finite strain consolidation behavior, i.e., changes in compressibility and permeability with increasing stress. A one-dimensional non-linear finite strain numerical model, Primary Consolidation, Secondary Compression, and Desiccation of Dredged Fill (PSDDF), has been used to predict the stress-dependent settlement of fine-grained dredged materials. In this paper, two case studies of using PSDDF are discussed to illustrate the applicability and accuracy of PSDDF. The first case study involves PSDDF simulations of laboratory-phased placement of a marine clay dredged from Busan, Korea. PSDDF results are in good agreement with the corresponding results of the laboratory large strain consolidation tests. The other involves estimating the service life of the Craney Island Dredged Material Management Area near Norfolk, Virginia, in the United States. The excellent agreement between measured and calculated values shows that PSDDF is a reliable tool for predicting settlement of dredged material.

Original languageEnglish
Pages (from-to)348-359
Number of pages12
JournalMarine Georesources and Geotechnology
Volume31
Issue number4
DOIs
Publication statusPublished - 2013 Oct 1

Fingerprint

Consolidation
consolidation
Soils
soil
Clay
soft clay
compressibility
desiccation
Compressibility
Service life
Numerical models
Compaction
fill
compression
permeability
clay
simulation
dredged material
laboratory

Keywords

  • dredged material placement
  • non-linear finite strain consolidation
  • phased placement
  • PSDDF

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Oceanography
  • Ocean Engineering

Cite this

Case Studies of PSDDF for Phased Placement of Dredged Soils. / Lee, Dongseop; Park, Sangwoo; Stark, Timothy D.; Kim, Younguk; Choi, Hangseok.

In: Marine Georesources and Geotechnology, Vol. 31, No. 4, 01.10.2013, p. 348-359.

Research output: Contribution to journalArticle

Lee, Dongseop ; Park, Sangwoo ; Stark, Timothy D. ; Kim, Younguk ; Choi, Hangseok. / Case Studies of PSDDF for Phased Placement of Dredged Soils. In: Marine Georesources and Geotechnology. 2013 ; Vol. 31, No. 4. pp. 348-359.
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