노후화된 균일형 저수지 제체의 월류모형실험과 3차원 침투특성 = Overtopping Model Experiments and 3-D Seepage Characteristics of the Embankment of Deteriorated Homogeneous Reservoirs

다국어 초록 (Multilingual Abstract)

In this study, an overtopping model experiments and three dimensional seepage characteristics at the deteriorated homogeneous reservoirs wereperformed to investigate the behavior of failure for embankment and spillway transitional zone due to overtopping. The failure pattern, pore waterpressure, earth pressure and settlement by overtopping were compared and analyzed. The pattern of the failure by overtopping was gradually enlargedtowards reservoirs crest from the spillway transition zone at initial stage. In the rapid stage and peak stage, the width and depth of failure graduallyincreased, and the pattern of the failure appeared irregular and several direction of the erosion. In the early stage, the pore water pressure at spillwaytransitional zone was more affected as its variation and failure width increased. In the peak stage, the pore water pressure was significantly increasedin all locations due to the influence of seepage. The earth pressure increased gradually according to overtopping stage. The pore pressure by thenumerical analysis was larger than the experimental value, and the analysis was more likely to increase steadily without any apparent variation. Thehorizontal and vertical displacements were the largest at the toe of slope and at the top of the dam crest, respectively. The results of this displacementdistribution can be applied as a basis for determining the position of reinforcement at the downstream slope and the crest. The collapse in theovertopping stage began with erosion of the most vulnerable parts of the dam crest, and the embankment was completely collapsed as the overtoppingstage increased.

참고문헌 (Reference)

1 이영학, "필터간격을 고려한 농업용저수지 제체의 침투특성" 한국농공학회 60 (60): 1-10, 2018

2 이달원, "지오텍스타일로 보강된 농업용 저수지 제체의 붕괴거동" 한국농공학회 56 (56): 59-64, 2014

3 노재진, "농업용 저수지 월류시 제체와 여수토 접속부의 붕괴거동" 한국농공학회 56 (56): 71-79, 2014

4 이영학, "노후화된 농업용 저수지의 효율적인 리모델링 방법" 한국농공학회 59 (59): 43-52, 2017

5 Foster, M. A., "The statistics of embankment dam failures and accidents" 37 (37): 1000-1024, 2000

6 Korea Rural Community Corporation, "The project of raising embankment of agricultural reservoir"

7 Korea Rural Community Corporation, "The final report of embankment heightening project the Gyeryong reservoir" 2011

8 Fread, D. L., "The development and testing of dam-break flood forecasting model" 1977

9 Sun. Y., "Solution method of overtopping risk model for earth dams" 50 : 1906-1912, 2012

10 "PLAXIS 3D, The Manual of the PLAXIS–software"

11 Stephen E. Coleman, "Overtopping Breaching of Noncohesive Homogeneous Embankments" American Society of Civil Engineers (ASCE) 128 (128): 829-838, 2002

12 Kumar, C., "Evaluation of selected equations for predicting scour at downstream of ski-jump spillway using laboratory and field data" 129 : 98-103, 2012

13 Kim, J. H., "Analysis on embankment failure due to overflow" 12 (12): 97-107, 2001

14 Ministry of Agriculture, Food and Rural Affairs, "Agricultural infrastructure fill dam design standards"

15 Paul W. Cleary, "A scenario-based risk framework for determining consequences of different failure modes of earth dams" Springer Science and Business Media LLC 75 (75): 1489-1530, 2015

16 Wang, G. S., "3-d seepage analysis of earth dam-case study of Pao-shan second reservoir in Taiwan" International Society of Offshore and Polar Engineers 2013