하천 수위 변화시 제체의 안정성 증대 방안 = Stability Increasement of River Side Fill for Variable Water Level

다국어 초록 (Multilingual Abstract)

The object of this study is to furnish fundamental data for designing and constructing riverside embankment by suggesting methods for the increasement of embankment stability and evaluating infiltration behavior and stability based on the material types and conditions that affect the change and construction of slope of embankment for variable water level.
Riverside embankment is stable when it is under and after construction, and in dry season, but it becomes unstable when water permeates into embankment due to the sudden rising of water level during rainfall.
The stability of riverside embankment differs from the features in civil engineering such as soil type, embankment condition, permeability, and shearing strength, and the variation of slope condition. Therefore, a careful investigation of these factors has to be made to examine the embankment stability.
Riverside embankment has a complex infiltration behavior depending on the change both in a outland water level and in soil types, permeability, slope condition, and basic ground. The results of this study are as follows.
The saturation region was formed around the waterside and when water level ascended, floodwater level and water level descended. The slope stability has decreased in floodwater level, and it has increased in descending level more than if it was in floodwater level. This must be caused by neither making a sudden descent of water level nor being a high embankment in height.
Supposing that the number of minimal permissible stability is 1.3, the stability could be maintained no condition that the cohesion is c=0.8t/㎡, ø=30°, and α_t=1.9t/㎥ in case of slope inclination of 1.3 for stability.
On condition that the cohesion is 1.0t/㎡, the stability could be maintained on ø=20° in case of slope inclination of 1.3 but when the slope inclinations is 1 : 2.5, in could be stable only over ø=30°
The result shows that the material types for banking and the maintenance of soil compaction are very crucial factors for stability.
In Proved that the gradient of slope and the cohesion of material for banking affected greatly the stability of embankment during a flood, and compared with those effect, the inner friction angle made smaller influence on it.