Riprap으로 보강된 농업용 저수지 제체의 붕괴거동
Behavior of Failure on Agricultural Reservoirs Embankment by Riprap Reinforcement Method
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참고문헌
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초록
In this study, the large scale test was performed to investigate the behavior of failure on the embankment and spillway transitional zone by overtopping. The pore water pressure, earth pressure, settlement and failure behaviors according to several reinforcing method were compared and analyzed. The porewater pressure showed a small change in the spillway transition zone and core, indicating that the riprap and geotextile efficiently reinforced theembankment, but non-reinforcement showed a largely change in pore water pressure. The earth pressure by riprap and geotextile at upstream slope andbottom core increased rapidly with the infiltration of the pore water by overtopping. And the earth pressure at crest showed a smally change due to effectof the inclined core. A settlement by riprap showed a small change and the geotextile decreased a rapidly due to failure of crest. The width of failure byriprap at intermediate stage (50 min) showed a largely due to sliding of crest. But, the width and depth of the seepage erosion after the intermediateovertopping period (100 min) were very small due to the effect of riprap than geotextile and non-reinforcement which delayed failure. It has the effect thatprotect reservoir embankment from erosion in the central part. The pore water pressure at the spillway transition zone due to overtopping increased arapidly in the case of non-reinforcement, but the reinforced methods by geotextile and riprap showed a smally change. Therefore, the reinforced methodby riprap and geotextile was a very effective method to protect permanently and the emergency an embankment due to overtopping, respectively.
Abstract
In this study, the large scale test was performed to investigate the behavior of failure on the embankment and spillway transitional zone by overtopping. The pore water pressure, earth pressure, settlement and failure behaviors according to several reinforcing method were compared and analyzed. The porewater pressure showed a small change in the spillway transition zone and core, indicating that the riprap and geotextile efficiently reinforced theembankment, but non-reinforcement showed a largely change in pore water pressure. The earth pressure by riprap and geotextile at upstream slope andbottom core increased rapidly with the infiltration of the pore water by overtopping. And the earth pressure at crest showed a smally change due to effectof the inclined core. A settlement by riprap showed a small change and the geotextile decreased a rapidly due to failure of crest. The width of failure byriprap at intermediate stage (50 min) showed a largely due to sliding of crest. But, the width and depth of the seepage erosion after the intermediateovertopping period (100 min) were very small due to the effect of riprap than geotextile and non-reinforcement which delayed failure. It has the effect thatprotect reservoir embankment from erosion in the central part. The pore water pressure at the spillway transition zone due to overtopping increased arapidly in the case of non-reinforcement, but the reinforced methods by geotextile and riprap showed a smally change. Therefore, the reinforced methodby riprap and geotextile was a very effective method to protect permanently and the emergency an embankment due to overtopping, respectively.
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