Numerical investigation of stone columns system for liquefaction and settlement diminution potential

International Journal of Geo-Engineering

Haleh Meshkinghalam¹  Masoud Hajialilue-Bonab¹  Ali Khoshravan Azar² 

[1] Department of Civil Engineering, University of Tabriz;Islamic Azad University Ahar Branch;

关键词: Liquefaction;    Soil improvement;    Stone columns;    FLAC3D;   

DOI  :  10.1186/s40703-017-0047-x

来源: DOAJ

【 摘 要 】

Abstract The aim of this study is the investigation of application of stone columns in decreasing liquefaction potential. Liquefaction potential of sand bed was studied by FLAC3D and validated by the results of VELACS international project. The effect of stone column was studied on decreasing excess pore pressure and soil settlement individually at the center of the model with different diameters. The effects of columns group were also studied on decreasing excess pore water pressure and soil settlement in a triangle arrangement. Finally an average vertical contact pressure of 100 kPa, which is approximately equal to the vertical pressure transmitted by a 10 story reinforced concrete building, was applied in the model. The implementation of stone columns individually, as a row or in groups with fewer numbers, caused a decrease in bulking in comparison to that of group using compressed meshing method. In certain numbers of columns, a decrease in distance among columns caused an increase in soil bulking. The columns group function will be better in settlement reduction, for center to center distance which is equal to 2.5–3.5 times of column’s diameter.

【 授权许可】

Unknown