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並列摘要


In general. the activities of harbour district, coastal construction and re-transportation of tide and current are all possible to influence the stability of research area and sediment environment in nearshore area. It indicates that status of deposit property of seabed and variability of sediment environment are important factors to stability and safety for the path of undersea gas pipeline. An assessment procedure and approach for the prediction of the wave-induced and earthquake-induced liquefaction potential and erosion potential are proposed for man lie engineering practice. The soil sample of this study is obtained from deposit zone of gas pipeline of seabed in Taiwan Strait. A series of Atter-berg limit test, direct shear test and cyclic triaxial test were performed to investigate the soil properties of research area and also provided important information for the evaluation. On the other hand, the physical characteristic and particle size of sediment and deposit area for gas pipeline of seabed are also investigated. Finally, the analysis and evaluation for erosion potential, dredging feasibility and pipeline stability were discussed. From the results, useful information is provided to the basis of detailed design and to the evaluation for the feasibility of laying gas pipeline of seabed.

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