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A Study on the Confining Effect Due to Geosynthetics Wrapping Compacted Soil Specimen  

Kim, Eun Ra (Dept. of Civil Engrg., Research Center of Inustrial Technology, Chonbuk National Univ)
Iizuka, Atsushi (Dept. of Architecture and Civil Engrg., Kobe Uni)
Kim, You-Seong (Dept. of Civil Engrg., Research Center of Industrial Technology, Chonbuk National Uni)
Park, Hong (Dept. of Geotechnical Engrg., LG Engrg. ＆ Construction Co. Ltd)
Publication Information
Journal of the Korean Geotechnical Society / v.20, no.5, 2004 , pp. 5-16 More about this Journal
Abstract
This paper presents the modeling of geosynthetic-reinforced compacted soils and discusses the reinforcement effect arising from confining the dilatancy deformation of the soil by geosynthetics. A series of compressive shear tests for compacted sandy soil specimens wrapped by geosynthetics are carried out by quantitatively examining the geosynthetic-reinforcement effect, occurring from a confinement of the dilative deformation in compacted soils during shearing. In the test, the initial degree of compaction is changed for each series of sandy soil specimens so that each series has different degree of dilatancy characteristics. Herein, the axial forces working on the geosynthetics so as to prevent dilative deformation of compacted soils during shearing are measured. Furthermore, the elasto-plastic modeling of compacted soils and a rational determination procedure for input parameters needed in the elasto-plastic modeling are presented. And to describe the irreversible deformation characteristics of compacted soils during shearing, the subloading yielding surface (Hashiguchi (1989)) to the elasto-plastic modeling is introduced. Finally, the elasto-plastic finite element simulation is carried out and the geosynthetic-reinforcement effect is discussed.
Keywords
Compacted soils; Elasto-plastic modeling; Geosynthetic-reinforcement;
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