Long-term Consolidation Characteristics of Busan Clay considering OC or NC States

doi:2011.25.6.110

J. Ocean Eng. Technol. > Volume 25(6); 2011 > Article

J. Ocean Eng. Technol. 2011;25(6):110-115.
DOI: https://doi.org/10.5574/KSOE.2011.25.6.110

Kim Yun-Tae,Jo Sang-Chan

Dept. of Ocean Engineering Pukyong National Univ.,Samsung Heavy Industries

과압밀 및 정규압밀영역의 응력상태에 따른 부산점토 장기압밀특성

김윤태,조상찬

부경대학교 해양공학과,삼성중공업

Keywords: Busan clay, Long-term consolidation, Secondary compression index, Creep rate

핵심용어: 부산점토, 장기압밀, 이차압축지수, 크리프 속도

Abstract

Numerouslong-term consolidation and secondary compression settlements may occur in Busan clay, which is astructured soft clay and consists of a thick clay deposit. As a surcharge load is applied to soils, soils experience different stress paths with depth. Therefore, it is necessary to study the long-term consolidation behavior of Busan clay considering stress conditions such as OC or NC states. In this study, a series of long-term consolidation tests were performed to investigate the consolidation characteristics of Busan clay for 20 days. The undisturbed clay samples were taken from 3 sites located in the Nakdong River estuary. The results showed that the creep rate of the Busan clay gradually decreased with time, which indicated that the secondary compression settlement decreased with time. In addition, the experimental results for 3 samples showed that the ratios were about 0.0363 and 0.051, respectively.