| Summary: | 碩士 === 國立成功大學 === 土木工程學系碩博士班 === 94 === This study is to evaluate the safety of a sea levee under earthquake condition. The evaluation is performed by both theoretical analysis and numerical simulation, besides a case in field is adopted to verified the analysis and simulation. Since a sea levee is subjected a combined forces and stresses, such as, wave force, earth pressure, self-weight, pore water pressure, and forces induced form earthquake, the theoretical analysis may obtain a closed-form soluation, however, the complicated field condition may not be included in the analysis. A software with finite element method is used to simulate the complicated conditions.
Results obtained both form analysis and simulation indicated that a the safety of a sea levee may decrease since the foundation subsidence resulting form the overdraw of ground water. Besides, the revetment of a sea levee which found on a thick deposit with saturated loose sand may collapse or slide soil liquefation as deposit subjected by earthquake force. The results also revealed that the hazards caused by a earthquake are not damage of the levee itself. Instead, the flood due to the collapse of the levee stracture may induce the major disasters.
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