A Study of the Seabed Dynamic Behaviors around the Pile Foundation under the Regular Wave Actions and its Uplift Resistance Force / 規則波作用於樁柱基礎周圍海床之動態行為與基樁抗拉拔力研究

博士 / 國立臺灣海洋大學 / 河海工程學系 / 106 / In this study, a series of hydraulic model tests about the regular wave induced seabed dynamic behavior around a monopile were carried out in a wave flume to investigate the wave force on pile and pore water pressue in seabed soil for the offshore pile foundation. The wave force of the immersed part of a pile and beneath the seabed, and the pore water pressure inside the seabed soil were investigated. Also the theory to evaluate the uplift capacity of belled piles in sandy soil was derived, and a new signal filtering method was developed to solve the noise problem in the experiment. The results show that the uplift capacity of the belled pile seated inlandly is larger than those on seabed which indicated the offshore pile foundation has less stability than constructed on land. The interface between the water and seabed surface contains a transition layer where the pore water pressure inside the seabed and the wave force on the pile varies non-linearly which might caused by the 3-D water flow atound the pile and the suspension or movement of the seabed sand occurred.
This study extends the discussion to the point of view of marine geotechnics, instead of geotechnics or marine engineering, which can more precisely describe the dynamic behavior of seabed soil under the wave actions and is much easier to contribute the research achievement to offshore structure or ocean engineering, especially to the hot pot of current Taiwan, offshore wind farm.

Identiferoai:union.ndltd.org:TW/106NTOU5192025
Date January 2018
CreatorsHsu, Shih-Yu, 許師瑜
ContributorsLin, Jaw-Guei, 林炤圭
Source SetsNational Digital Library of Theses and Dissertations in Taiwan
Languagezh-TW
Detected LanguageEnglish
Type學位論文 ; thesis
Format202

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