Cyclic response of floating geosynthetic-encased steel slag columns in soft clay  

作　　者：Kaiwen Liu Bailin Li Yuangang Li M.Hesham El Naggar Tengfei Wang Ruizhe Qiu 

机构地区：[1]Key Laboratory of High-Speed Railway Engineering(Ministry of Education),Southwest Jiaotong University,Chengdu,610031,China [2]School of Civil Engineering,Southwest Jiaotong University,Chengdu,610031,China [3]Sichuan Gezhouba Batongwan Expressway Co.,Bazhong,636600,China [4]Department of Civil and Environmental Engineering,Western University,London,ON,N6A5B9,Canada

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》2025年第2期1182-1193,共12页岩石力学与岩土工程学报(英文)

基　　金：support from the National Natural Science Foundation of China(Grant Nos.52078427 and 51608461)is greatly acknowledged.

摘　　要：Geosynthetic-encased stone column(GESC)technology for strengthening soft clay offers significant advantages in terms of cost-effectiveness,environmental sustainability,and engineering applicability.It is widely applied in treating soft foundations for railways,bridges,and embankments.This study evaluates the cyclic response of the geosynthetic-encased steel slag column(GESSC)composite foundation employing three-dimensional nonlinear finite element analysis.A numerical study is conducted to assess the cyclic response of floating GESSC considering the influence of key design variables,including cyclic load amplitude,loading frequency,geosynthetic encasement stiffness,and length-to-diameter ratio.Results show that both cyclic load amplitude and frequency affect the cumulative settlement and excess pore pressure within the GESSC foundation.Within specified limits,increasing the encasement stiffness and column length can significantly improve the GESSC load-bearing characteristics.The parametric study suggests an optimal geosynthetic encasement stiffness for the field prototype columns within the range of 4480–5760 kN/m and a critical steel slag column length of 10 times the column diameter.

关 键 词：Steel slag column Soft clay Cyclic loading Numerical simulation GEOSYNTHETICS 

分 类 号：TG1[金属学及工艺—金属学]