水位 急變化를 고려한 河川 增築 堤體의 浸透 擧動 = Seepage Behavior for Enlargement of River Embankment Considering in Water Level

다국어 초록 (Multilingual Abstract)

To study seepage behaviors a model was designed and designed and was applied to some cases of enlargement of river embankment. The model is simulated and analysed by finite element method. The materials of enlargement are coarse sand, fine sand, and weathered residual soil. Usually, the embankment of small rivers is made of these materials.
The aim of this study is to aid for selection of desirable materials for enlargement of old embankment in small rivers.
The results of seepage behavior by finite element method are similar to the results of the experiment. The seepage behavior is unstable at the rapid rise and drawdown water level in uniform landfills.
The enlargement of outward slope using some sands shows stable seepage behavior in the old embankment made of weathered residual soils. The enlargement of inward slope by some residual soils is more stable seepage behavior in the old embankment made of some sand soils. In this case, the flow of the outward slope is mainly unsaturated flow, and the pore water pressure of the outward slope is low or negative. The outward part of embankment seems to serve as filtration in the stable case of seepage behavior.

목차 (Table of Contents)

• I. 서 론
• II. 해석 모델 및 재료
• II-1. 지배 방정식과 유한요소식
• II-2 해석 모델
• II-3 초기 및 경계조건
• III. 해석 결과 및 분석
• III-1 실험과 수치해석 결과와의 비교
• III-2 제체 하류측을 증축하는 경우 자유 수면의 변화
• III-3 제체내 속도 vector의 변화
• III-4 전수두의 변화
• III-5 압력수두의 변화
• III-6 간극수압의 변화
• IV. 결 론