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Influence of Progressive Consolidation on Consolidation Behavior of Normally Consolidated Clayey Soil with Vertical Drains  

Yune Chan-Young (School of Civil, Urban and Geosystem Engrg., Seoul National Unive.,)
Chung Choong-Ki (School of Civil, Urban and Geosystem Engrg., Seoul National Unive.,)
Publication Information
Journal of the Korean Geotechnical Society / v.21, no.6, 2005 , pp. 5-18 More about this Journal
Abstract
In this study, the influence of progressive consolidation from the drainage boundary on the subsequent process of consolidation was investigated. Analytical theory and numerical program f3r consolidation of clayey soil were developed based on finite difference method, in which spatial variation of permeability and volume compressibility were implemented. And model ground with normally consolidated clayey soils and a vertical drain at its center were simulated. Various types of soils with different relations between coefficient of volume compressibility and permeability and void ratio were applied. Also numerical simulations based on the properties of the normally consolidated clay at Nakdong River basin and reconstituted kaolinite soil were performed to recognize its practical impact. Consequently, it is found out that retardation of consolidation induced by progressive consolidation is very important to understand consolidation behavior on field conditions and its effect is remarkable at the initial state of consolidation, and increases with plasticity index and applied load.
Keywords
Coefficient of consolidation; Consolidation; Finite difference analysis; Permeavility; Volume compressibility;
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