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http://dx.doi.org/10.7843/kgs.2011.27.4.021

Evaluation of Compressibility for Normally Consolidated South-east Coast Clay Using CPT and DMT  

Hong, Sung-Jin (School of Civil, Environ. & Arch. Engrg., Korea Univ.)
Chae, Young-Ho (School of Civil, Environ. & Arch. Engrg., Korea Univ.)
Lee, Moon-Joo (Hanwha Engrg. and Construction)
Lee, Woo-Jin (School of Civil, Environ. & Arch. Engrg., Korea Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.27, no.4, 2011 , pp. 21-32 More about this Journal
Abstract
A series of in-situ and laboratory tests were performed for the clayey soils of Busan area in order to develop the methods to evaluate the compressibility using CPT and DMT results. The laboratory tests show that the clayey layers of Busan areas are normally consolidated, and their compression indices are turned out to be 0.5~1.3. From the analysis of test results, correlation factors between the cone resistance and constrained modulus (${\alpha}_m$ and ${\alpha}_n$) are observed to decrease with increasing plasticity index, and the correlation factor between the dilatometer modulus and constrained modulus $(R_M)$ increases with $1/I_D$. Based on these relationships, the methods evaluating the constrained modulus from CPT and DMT results are suggested. It is shown that the prediction method by CPT underestimates the constrained modulus of improved ground, whereas the prediction method by DMT is suitable for evaluating the constrained modulus of improved and unimproved ground.
Keywords
Compression index; Consolidation test; Constrained modulus; CPT; DMT;
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Times Cited By KSCI : 1  (Citation Analysis)
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