Effects of geotechnical parameters uncertainties on monopile foundation stability

• Main Authors: Che-WeiHsu, 許哲維
• Other Authors: Yu-Shu Kuo
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/4kj8e8

碩士 === 國立成功大學 === 水利及海洋工程學系 === 106 === It’s important to grasp the soil properties in the beginning of offshore windturbine development. Before the windturbine design and construction, developers can only assemble the risk of the development though the limit borehole data. They will face the problem of the soil uncertainty. In order to deal with the soil uncertainties, in this research, use statistic method to test the probability distribution of Standard Penetration test value (SPT-N). Simulate the soil uncertainties though Monte Carlo Method and following the engineering soil type PDF create the random database for SPT-N. PLAXIS 3D numerical model is used to analysis the behaved of the monopole foundation in the study. To analysis the effect of the monopile foundation stability under the soil uncertainties condition, this study create the auto PLAXIS program through PYTHON. This program can automatically update the soil strength parameter, which is created in random database, for each numerical model case. It can save large time and work for the whole case study. The case study result show that the variance of the monopile deformation is not signification as considering the soil uncertainties through modifying the soil strength parameters. In the future study, it can consider the soil deformation parameter to simulate the soil more reality.