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지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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- 학위논문
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- 2015
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Approximately 95% of landslides in Korea are triggered by intensive rainfall in the rainy season, landslides cause many damage every year. Therefore, it is necessary to study that landslide occurrence with variation of factor of safety by rainfall.
In this study the unsaturated soil column tests were carried out for weathered granite soils and weathered gneiss soils samples to find out the relationship between rainfall intensity and rainfall infiltration velocity on the basis of different unit weight conditions for the soils. For the column test, three different unit weights such as 1.39 g/cm3 for in-situ condition, 1.22 g/cm3 and 1.47 g/cm3 for loose and dense unit weights, respectively, were selected for possible weathered soils molded in column, and two different rainfall intensities (20 mm/h and 50 mm/h) were selected for the analysis. Also, rainfall infiltration velocity was calculated by the change in the volumetric water content.
The test results showed that the higher rainfall intensity and the lower unit weight of soil, the faster rainfall infiltration velocity. In addition, the change range of rainfall infiltration velocity was influenced more strongly by the change of rainfall intensities than that of unit weights.
This study performed numerical analysis to understand changes of the factor of safety using the SEEP/W and SLOPE/W programs. The analysis results showed that the higher rainfall intensity, the faster reducing the factor of safety.
In this study the unsaturated soil column tests were carried out for weathered granite soils and weathered gneiss soils samples to find out the relationship between rainfall intensity and rainfall infiltration velocity on the basis of different unit weight conditions for the soils. For the column test, three different unit weights such as 1.39 g/cm3 for in-situ condition, 1.22 g/cm3 and 1.47 g/cm3 for loose and dense unit weights, respectively, were selected for possible weathered soils molded in column, and two different rainfall intensities (20 mm/h and 50 mm/h) were selected for the analysis. Also, rainfall infiltration velocity was calculated by the change in the volumetric water content.
The test results showed that the higher rainfall intensity and the lower unit weight of soil, the faster rainfall infiltration velocity. In addition, the change range of rainfall infiltration velocity was influenced more strongly by the change of rainfall intensities than that of unit weights.
This study performed numerical analysis to understand changes of the factor of safety using the SEEP/W and SLOPE/W programs. The analysis results showed that the higher rainfall intensity, the faster reducing the factor of safety.
목차
Ⅰ. 서 론 11.1 연구배경 및 목적 11.2 연구내용 4Ⅱ. 이론적 배경 62.1 불포화토 기본이론 62.1.1 불포화토 기본구조 62.1.2 모관흡수력 72.1.3 체적-질량 관계 92.2 침투류 해석 122.3 사면 안정 해석 15Ⅲ. 연구지역 및 연구방법 183.1 연구지역 183.1.1 강원도 강릉시 183.1.2 경기도 용인시 193.1.3 시료채취 213.2 불포화토 강우침투 칼럼시험장치 및 시험방법 233.2.1 칼럼시험장치 233.2.2 시험방법 25Ⅳ. 칼럼장치를 이용한 강우침투속도 분석 294.1 화강암 풍화토 시험결과 및 분석 294.1.1 연속강우 294.1.2 반복강우 424.2 편마암 풍화토 시험결과 및 분석 464.3 토의 564.3.1 풍화토별 강우침투속도 비교분석 564.3.2 지역별 강우침투속도 비교분석 58Ⅴ. 강우침투속도를 이용한 연구지역 사면 안정성 분석 605.1 화강암 풍화토 615.1.1 모델링 615.1.2 해석조건 635.1.3 화강암 풍화토 강우침투속도를 고려한 사면 안정성 해석 665.2 편마암 풍화토 775.2.1 모델링 775.2.2 해석조건 795.2.3 편마암 풍화토 강우침투속도를 고려한 사면 안정성 해석 825.3 풍화토별 사면 안정성 해석 비교분석 86Ⅳ. 결 론 89참고문헌 또는 인용문헌 91
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