Abstract
For fine grained soils of 10 samples around coast areas in Korea, classified into three regions of West Coast, Kyungnam and Jeonnam, settling-consolidation tests of 161 were performed to evaluate characteristics of sedimentation and consolidation during dredging and reclamation and characteristic values proposed from Yano's method (1985) were used to analyze and assess their characteristics in this research. The settling-consolidation tests with columns of 1m in height were performed, changing initial water content and initial height of slurry, for 4, 3, and 3 samples from regions of West Coast, Kyungnam, and Jeonnam respectively. From test results effect of initial water content on coefficient of consolidation-sedimentation and initial velocity of sedimentation were analyzed, and regression equations having correlation between them were derived. The void ratios at initiating consolidation were analyzed on each samples and suggested regression equations for three regions. In addition, as a result of analyzing relation between initial void ratio of slurry and void ratio at initiating selfweight consolidation, expected ranges of void ratio at initiating consolidation for fine-grained soils from three regions of Korea coast could be proposed.
본 연구에서는 국내 해안에 분포하는 세립토의 침강압밀특성을 평가하기 위해 10개의 시료에 대하여 161회의 침강압밀실험을 수행하고, 이를 3개 권역(서해안, 경남, 전남)으로 구분하여 Yano(1985)가 제안한 특성치로 분석 평가하였다. 침강압밀실험은 서해안권역 4개와 경남권역 3개 및 전남권역 각 3개의 시료에 대하여 높이 1m의 컬럼을 이용하여 초기함수비와 초기높이를 변화하면서 실험을 진행하였다. 각 권역별 침강압밀계수와 초기침강속도를 분석하여 대표 상관식을 제시하였다. 각 실험조건별로 자중압밀 개시 간극비를 분석하여 권역별 초기함수비와의 상관관계식을 제안하였으며, 초기 슬러리 간극비와의 관계도 분석하여 세립토의 압밀 개시 간극비 범위를 제시하였다.