Case Study of Undrained Strength Stability Analysis for Dredged Material Placement Areas
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 135, Issue 3
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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Acknowledgments
The writers appreciate the financial support of the U.S. Army Corps of Engineers, Engineer Research and Development Center in Vicksburg, Miss. and the cooperation of the Norfolk District of the U.S. Army Corps of Engineers. The views expressed in this paper are those of the writers and do not reflect the views of the U.S. Army Corps of Engineers.
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Information & Authors
Information
Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 135 • Issue 3 • May 2009
Pages: 91 - 99
Copyright
© 2009 ASCE.
History
Received: Jul 17, 2007
Accepted: Jan 9, 2009
Published online: May 1, 2009
Published in print: May 2009
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