| Summary: | 碩士 === 逢甲大學 === 土木工程學系 === 105 === Hu-Tou-Pi Dam is an old dam that has experienced several failures of different modes since 1841. After each failure, urgent repairs were carried out, especially when the dam body suffered crack failures due to seismic activities. In the past, scholars and experts all believed that the cause of these failures was vibration during earthquakes. Therefore, they utilized ground-penetrating radar, electrical resistivity survey, and test pits to look for cracks and to determine crack depths. Based on these results, plans were devised for emergency repairs focused on repairing the cracks.
Evidence shows that failure of the dam is due to tectonic earthquakes, in which the primary effect is the shear banding of tectonic plates and the secondary effect is the vibration of tectonic plate. Therefore, it is only through investigation into the shear banding of tectonic plate that the real reason behind the failure can be identified and effective emergency repairs can be carried out.
This paper is motivated by the need to lower the risks associated with extreme weather conditions such as hurricanes or storms during emergency repairs and also the risks of being subject to another earthquake of ML=6.4 after the repairs. Professional causes of failure are first identified by my advisor. Then the most appropriate and quality earthquake-resistant homogeneous dam materials are selected. The correct design approach, systematic construction quality control measures, and supervision throughout the construction are put in place. In-situ test was conducted on prototype dam in the 2017 Tainan Earthquake of ML=5.7 demonstrated that the repaired Hutoupi Dam finished in 2017 can achieve zero risk for both types of risks mentioned above.
|
|---|
