A New Model of Pore Pressure Generation for Seabed Soils Under Typhoon Wave Loading

摘要

With climate change in recent years caused the occurred frequencyrnincreasing of extremely waves. Due to sea level rise and the typhoonrndisasters, it could be caused the pore pressure of seabed may bernsustained a build-up state below the coastal structures, and occurringrnand increasing the risk of the seabed liquefaction.rnMost of the past related researches followed the earthquake relevantrntheory to evaluate the dynamic characteristic of cyclic wave loading,rnincluding wave induced the single external stress or internal stress,rnnumber of cycles in seabed, and pore pressure generation model forrnearthquake mechanism. Therefore, this study used experimentalrnmechanics and theoretical model to simulate liquefaction behaviorrnunder typhoon wave loading with case study of "Zone A" of KaohsiungrnHarbor Intercontinental Container Center at second stage project.rnFrom the related cyclic triaxial test results, this study proposed an porernpressure generation model for seabed under long-term wave loading byrnthe hyperbolic sine function, and suggest a testing parameter to predictrnthe curve of pore pressure under different test conditions as Tp=0.005,rn0.05 and 0.5. The model can be applied in assessment of typhoon waverninduced seabed liquefaction potential. The maximum possible liquefiedrndepth is about 6.6m when Tc =1200s in this study area, and provide thernwell marine geotechnical practical application for seabed stability.