| Title |
A Practical Analysis Method for the Design of Piled Raft Foundations |
| Authors |
송영훈(Song, Young Hun) ; 송명준(Song, Myung Jun) ; 정민형(Jung, Min Hyung) ; 박영호(Park, Yung Ho) |
| DOI |
https://doi.org/10.12652/Ksce.2017.37.1.0083 |
| Keywords |
근사해석법;말뚝지지 전면기초;침하량;기초판-말뚝-지반 상호작용 Approximate analytic method;Piled-raft foundation;Settlement;Raft-pile-soil interaction |
| Abstract |
In case of estimation of settlement for the piled-raft foundation, it is necessary to consider interaction among raft, piles and soil. But, simple analytic methods usually are not applicable to considering this complicated interaction. In this study, a computer-based approximate analytic method, HDPR, was developed in consideration of above mentioned interaction in order to analysis of settlement for the piled-raft foundation. The finite element method was applied to raft analysis by means of the Mindlin plate theory, and soil and piles were modeled as springs which were connected with their raft. The linear spring which can consider multi layered soil and the non-linear spring were applied to soil springs and pile springs, respectively. The raft-piles-soil interaction was reflected to each spring. In order to verify the developed analytic method, it was compared and analyzed with 3D FEM analysis, existing approximate analytic method and site monitoring data. As a result, the developed analytic method showed reasonable results of settlement estimations of raft and piles for each case. From a practical point of view, it is confirmed that this analytic method is able to apply for analysis and design of the piled-raft foundation. |