Laboratory Test of Piled-Raft Foundation Improved by Gravel Mat

doi:2011.25.2.47

J. Ocean Eng. Technol. > Volume 25(2); 2011 > Article

J. Ocean Eng. Technol. 2011;25(2):47-54.
DOI: https://doi.org/10.5574/KSOE.2011.25.2.047

Seo Young-Kyo,Lee Jeong-Hoon

Department of Ocean Engineering Korea Maritime University,Department of Ocean Engineering Korea Maritime University

Gravel Mat로 보강된 말뚝지지 전면기초의 실내모형실험

서영교,이정훈

한국해양대학교 해양공학과,한국해양대학교 해양공학과

Keywords: Piled raft foundation, Settlements, Load-sharing ratio, Gravel mat

핵심용어: 말뚝지지 전면기초, 침하량, 하중분담률, 자갈메트

Abstract

A piled raft foundation is one of the systems used to reduce the settlement of structures. However, the general design method for a piled raft foundation system assumes that the piles only support external loads, which exclude the bearing capacity of the raft itself. In this study, an experimental model test was performed to evaluate the raft capacity for the external load on the sand. Additionally, a part of the sandy ground under the raft was replaced with a gravel mat to reinforce the piled raft foundation system and increase the bearing capacity. Then, parametric studies of the reinforced ground were performed to determine the displacement and load-sharing ratio of the piled raft foundation system.