Validation of numerical levee seepage analysis using physical modeling |
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학술지명 11th ICGS
저자 신동훈,김기영
발표일 2018-09-18
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An integrated disaster management platform for riverside infrastructure (WINS+) was re-cently developed to provide real-time safety information for riverside infrastructure. Within this platform, fragility curves against failure (constructed from numerous pre-calculated numerical analyses) are com-pared to real-time in-situ measurement data. In this study, centrifuge testing and two-dimensional seepage analyses of a levee along the Nakdong river were conducted to validate the safety evaluation process of the WINS+ platform. Using in-situ water level variation data, numerical and physical models were designed with the same seepage conditions. Then, the safety of the subject levee against seepage was examined using the models by evaluating the effects of (1) the variation in water level from normal operation to flood stage, and (2) overtopping of the levee. The results of the centrifuge modeling of the testbed levee indicate that the overtopping of a levee is the primary risk dominating levee safety rather than rapid water level change. Comparison of numerical analysis and physical modeling results show good agreement in the seepage be-havior of the levee when subjected to fluctuating water levels. Thus, the built-in hybrid safety evaluation method of WINS+ is found to be valid for safety check of levees against high water. |