Numerical simulation of marine transitional soils

抄録

Marine soils are primarily formed through the transportation of rock and soil particles from adjacent land areas to the sea/ocean by wind, ice, rivers, and rainwater runoff, which accumulate on the seafloor. Waterfront structures are continually being constructed globally, either directly on these soils or in conjunction with reclamation projects to create new commercial land. These soils vary from coarse-grained (gravelly sands, sands, and generally soils exhibiting sand-like behaviour) to fine-grained (clay-like behaviour), and their particle size distribution depends on the distance from the landmass, the mechanism of transportation, and the coastal processes that may affect them. A special and common category of these soils is the mixture of coarse-grained and fine-grained materials that exhibit, depending on the location investigated, either sand-like or clay-like behaviour, which can be challenging to differentiate. In this study, three different nonlinear dynamic analysis techniques are applied to assess the impact of such soils on reclamation and wharf waterfront structures. This paper compares these techniques and discusses the outcomes, while also proposing a method to reasonably simulate marine transitional soils for designing new waterfront and/or marine structures.