농업용 저수지 제방에서 3차원 수치해석에 의한 감압정의 효과 분석
Evaluation on the Effect of Relief Wells by 3D Numerical Analysis on the Embankment of an Agricultural Reservoir
2
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
Through 3D seepage analysis of pressure relief well installed on the embankment of agricultural reservoir, the effects of reducing pore water pressureand hydraulic gradient, and increasing piping safety, depending on diameter (0.2, 0.4, 0.6 m) and space (10, 25, 50 m) of relief well, were analyzed. The conclusions drawn through this study are as follows. i) At the location of pressure relief well, pore water pressure decreases by 25.3∼62.5%, andhydraulic gradient decreases by 22.4∼55.7%. ii) Between relief wells, pore water pressure decreases by 2.7∼40.3%, and hydraulic gradient decreasesby 2.8∼47.0%, which are relatively less than at the cross section of installed location of relief well. iii) Piping safety factor by critical hydraulicgradient increases by 28.9∼125.6% at the location of relief well and increases by 2.9∼88.8% between relief wells. iv) Seepage analysis needs tobe performed by the 3D method to make evaluation of seepage at the location of relief well and between relief wells possible. v) Additional evaluationis required for various conditions such as waterhead, engineering characteristics of embankment body and its foundation, location, diameter, spacing anddepth of pressure relief well.
Abstract
Through 3D seepage analysis of pressure relief well installed on the embankment of agricultural reservoir, the effects of reducing pore water pressureand hydraulic gradient, and increasing piping safety, depending on diameter (0.2, 0.4, 0.6 m) and space (10, 25, 50 m) of relief well, were analyzed. The conclusions drawn through this study are as follows. i) At the location of pressure relief well, pore water pressure decreases by 25.3∼62.5%, andhydraulic gradient decreases by 22.4∼55.7%. ii) Between relief wells, pore water pressure decreases by 2.7∼40.3%, and hydraulic gradient decreasesby 2.8∼47.0%, which are relatively less than at the cross section of installed location of relief well. iii) Piping safety factor by critical hydraulicgradient increases by 28.9∼125.6% at the location of relief well and increases by 2.9∼88.8% between relief wells. iv) Seepage analysis needs tobe performed by the 3D method to make evaluation of seepage at the location of relief well and between relief wells possible. v) Additional evaluationis required for various conditions such as waterhead, engineering characteristics of embankment body and its foundation, location, diameter, spacing anddepth of pressure relief well.
참고문헌 (9)
- 변요셉, "하천 제방 단면 특성이 동수경사에 미치는 영향에 관한 해석적 연구", 한국지반환경공학회 논문집, 13(3), pp.13~19 (2012), 한국지반환경공학회
- 장재훈, "소규모 필댐의 침투수 관리를 위한 감압정 효과에 대한 수치해석", 한국지반환경공학회 논문집, 21(2), pp.5~13 (2020), 한국지반환경공학회[DOI]
- 조성은, "투수계수의 공간적 변동성을 고려한 층상지반에 대한 확률론적 침투해석", 한국지반공학회논문집, 28(12), pp.65~76 (2012), 한국지반공학회
- Heidarzadeh, M., "Construction of relief wells under artesian flow conditions at dam toes: Engineering experiences from Karkheh earth dam, Iran", International Journal of Civil Engineering, 13(1), pp.73~80 (2015)[DOI]
- 진석우, "원심모형실험을 통한 전석층이 존재하는 제방에서의 파이핑 현상 모사", 대한토목학회 논문집C, 31(1), pp.1~10 (2011), 대한토목학회
- MAFRA (Ministry of Agriculture, Food and Rural Affairs), "Statistical yearbook of land and water development for agriculture", ~ (2018)
- MAFRA (Ministry of Agriculture, Food and Rural Affairs), "Development of collapse prevention technology for agricultural dams (II)", ~ (2019)
- Salmasi, F., "Use of numerical simulation to measure the effect of relief wells for decreasing uplift in a homogeneous earth dam", Civil Engineering Infrastructures Journal, 48(1), pp.35~45 (2015)[DOI]
- Design, construction and maintenance of relief wells, "U.S. Army Corps of Engineers", Department of the Army U.S. Army Corps of Engineers, ~, pp.EM 1110-2-1914 (1992)