日本語フィールド
著者:Pongsivasathit, S., 柴 錦春、Ding, W.-Q. 読み: Pongsivasathit, S., チャイ ジンチュン、Ding, W.-Q.題名:フローティングコラムによる改良した軟弱地盤の圧密沈下発表情報:Ground Improvement, Proceedings of Institute of Civil Engineers, UK 巻: 165キーワード:地盤改良、ソイルセメントコラム、圧密沈下概要:抄録:The interaction behavior between floating column and surrounding soil with or without a surface cement stabilized slab has been investigated by laboratory model test as well as finite element analysis (FEA) using an axisymmetric unit cell model. Based on the test and the FEA results, a method for calculating the consolidation settlement-time curve of floating column improved soft clayey subsoil has been developed. The method is modified from the method by Chai and Pongsivasathit in 2010, which treating a part of the column improved layer with a thickness of Hc as an unimproved layer in settlement calculation to consider the effect of possible penetration of the column into the soft soil layer below the column. An explicit equation for calculating the value of Hc has been proposed as a function of area improvement ratio (), depth improvement ratio (), load intensity (p) and the undrained shear strength (su) of the soft clayey soil. The validity of the method has been checked using the laboratory model test results as well as 4 field case histories in Japan.英語フィールド
Author:Pongsivasathit, S., Chai, J.-C. and Ding, W.-Q.Title:Consolidation settlement of floating column improved soft clayey depositAnnouncement information:Ground Improvement, Proceedings of Institute of Civil Engineers, UK Vol: 165Keyword:Ground Improvement, soil-cement column, consolidation settlementAn abstract:The interaction behavior between floating column and surrounding soil with or without a surface cement stabilized slab has been investigated by laboratory model test as well as finite element analysis (FEA) using an axisymmetric unit cell model. Based on the test and the FEA results, a method for calculating the consolidation settlement-time curve of floating column improved soft clayey subsoil has been developed. The method is modified from the method by Chai and Pongsivasathit in 2010, which treating a part of the column improved layer with a thickness of Hc as an unimproved layer in settlement calculation to consider the effect of possible penetration of the column into the soft soil layer below the column. An explicit equation for calculating the value of Hc has been proposed as a function of area improvement ratio (), depth improvement ratio (), load intensity (p) and the undrained shear strength (su) of the soft clayey soil. The validity of the method has been checked using the laboratory model test results as well as 4 field case histories in Japan.