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Case Study of Undrained Strength Stability Analysis for Dredged Material Placement Areas

Authors
Stark, Timothy D.Choi, HangseokLee, Chulho
Issue Date
May-2009
Publisher
ASCE-AMER SOC CIVIL ENGINEERS
Keywords
Case reports; Dikes; Dredge spoils; Slope stability; Soft soils; Soil strength
Citation
JOURNAL OF WATERWAY PORT COASTAL AND OCEAN ENGINEERING, v.135, no.3, pp.91 - 99
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF WATERWAY PORT COASTAL AND OCEAN ENGINEERING
Volume
135
Number
3
Start Page
91
End Page
99
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/120173
DOI
10.1061/(ASCE)0733-950X(2009)135:3(91)
ISSN
0733-950X
Abstract
This paper describes the stability of the west perimeter dike at the Craney Island Dredged Material Management Area (CIDMMA) using an undrained strength stability analysis. An undrained strength stability analysis expresses the undrained shear strength in terms of the effective overburden stress of the dredged material and the marine clay underlying the dike. An undrained strength stability analysis was used to evaluate the current stability of the west perimeter dike, the possibility of raising the perimeter dike, and the effect of undrained strength increase along with full consolidation by installing vertical strip drains on the current stability and the potential for raising the dike. Vertical strip drains would accelerate consolidation of the confined dredged material and underlying marine clay and thus produce an increase in undrained shear strength and dike stability. The analyses show that installation of vertical strip drains and full consolidation of the dredged material and underlying marine clay should allow the perimeter dike and dredged material to be raised and an increase in CIDMMA service life.
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College of Engineering (School of Civil, Environmental and Architectural Engineering)
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