| 英文摘要 |
In recent years, damages to ports filled with gravelly sandy soils due to earthquake-induced liquefaction have been observed and received considerable attention in geotechnical engineering. In order to study the liquefaction behavior and dynamic characteristics of sand-gravel composites, a series of 1 g shaking table tests are performed using a large-scale biaxial laminar shear box filled with gravelly sandy soils sampled from the Port of Hualien in Taiwan, as a case study for its failure during the Hualien earthquake on 6 February, 2018. Specimens are prepared using the wet pluviation technique in order to simulate the in-situ conditions of the sand-gravel composites in the wharf area. For input motions, the records of the Hualien earthquake with varying amplitudes are applied, as well as white noises and sinusoidal sweeps for further comparison. Instrument sensors including accelerometers, piezometers, and linear displacement transducers are used to record the accelerations, pore water pressure responses, and displacements of the soil specimen during the dynamic tests. According to the results, if the seismic loading is large enough the excess pore water pressure would be significantly increased and lead to the gravelly soils liquefy. |
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