Abstract
준설매립지반은 다양한 현장조건과 준설토의 침강-퇴적-자중압밀 과정에서 형성되기 때문에 현장조건 및 준설토의 특성에 따라 준설매립지반의 거동이 좌우된다. 준설매립지반은 준설토의 특성에 따라 서로 다른 분리퇴적층이 조성되기 때문에 다양한 현장조건과 준설토의 침강-퇴적-자중압밀특성을 고려할 수 있는 실험방법이 필요하다. 이에 본 연구에서는 현장조건인 펌프의 투기속도와 준설토의 특성에 따른 준설토의 침강-퇴적 양상을 확인하기 위하여 원심모형실험과 Laser Particle Size Analyzer를 수행하였다. 그 결과 모래 준설토 및 조립질과 세립질 흙이 혼합된 준설토는 입자에 따라 분리 퇴적되는 양상으로 나타났으며, 점성 준설토는 매립공간의 바닥면과 평행하게 퇴적되는 양상으로 나타났다. Characteristics of sedimentation of dredged soil is depended on the field condition and characteristics of dredged soil because dredged fill ground was formed by various field condition, sedimentation and self-weight consolidation process of dredged soil. Dredged fill ground is formed as separated sedimentary layer by characteristics of dredged soil. Therefore, it requires some special test method to consider a various field condition, characteristics of sedimentation and self-weight consolidation of dredged soil. In this study, in order to identify the characteristics of sedimentation of dredged soil with disposing velocity geo-centrifuge test and laser particle size analyzer were performed. As a results, river and mixed dredged soil show the separation sedimentation by soil particle size. And sedimentation of clayey dredged soil is parallel to the bottom surface of dredged fill space.
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