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Estimation on External Forces Applied to Suction Caisson Using Seepage Analysis

침투해석을 이용한 석션 케이슨에 작용하는 외력 평가

Kim, Jeongsoo;Jeong, Yeon-Ju;Park, Min-Su
김정수;정연주;박민수

  • Received : 2018.11.20
  • Accepted : 2019.01.09
  • Published : 2019.04.01

Abstract

A suction caisson has been widely used for anchor and foundation of offshore structures due to its broad application, simple installation, and rapid construction. In design of suction caisson foundation, the bearing capacity and the stability of soil are mainly dealt with and analysis methods for them are presented in design codes related to the foundation. On the other hand, the method for structural safety analysis of the suction caisson is not generalized, in particular for load modeling of the caisson under suction. Consequently, there are difficulties in design of the caisson cross section. For this reason, this study analyzed the magnitude and distribution of pore water pressure on inner and outer surface of the caisson using theoretical and numerical seepage analyse, and an approach to reasonably estimate the load applied to the structural analysis of the caisson was presented. Furthermore, effects of penetration depth, anisotropy of permeability, and suction pressure on the pore water pressure were analyzed.

Keywords

Suction pressure;Seepage analysis;Structural load modeling;Foundation;Anchor

Acknowledgement

Grant : 케이블교량 글로벌 경쟁력 강화를 위한 전주기 엔지니어링 및 가설공법 개발

Supported by : 국토교통과학기술진흥원