Work

Dynamic Response of GESCs‐Supported Embankments in Sand Under Sinusoidal Loading: A Fluid‐Solid Coupling Method

Year: 2025

Type: article

Abstract: ABSTRACT The geosynthetic‐encased stone columns (GESCs) are extensively used for improving weak foundations. Three‐dimensional numerical models with a fluid‐solid coupling method are established to delve into the dynamic response of GESCs‐supported embankment in sand under sinusoidal loading. Further, loading frequency ( f ), loading amplitude ( a m ), embankment loads ( σ e ), space‐to‐diameter ratio ( s / D ), column length‐to‐foundation thickness ratio ( L / H ), and Young's modulus of soil ( E s ), are selected to conduct the parametric study. Numerical results indicate that encasement guarantees the anti‐liquefaction of GESCs compared to OSCs and untreated foundations. However, the soil outside of the GESCs reinforcement region results in the absolute value of the excess pore water pressure ratio ( R u ) larger than 1.0. The sand foundations develop slip surfaces under embankment and sinusoidal loads based on maximum lateral displacement and their positions. GESCs are more sensitive to lower f and higher a m . It is recommended to consider the σ e in the dynamic analysis process. A larger L / H or E s / E c ( E c = Young's modulus of column) or smaller s / D is conducive to the dynamic resistance of GESCs.

Source: International Journal for Numerical and Analytical Methods in Geomechanics

DOI: 10.1002/nag.70055

Authors: Ling Zhang, Xiaocong Cai, Zijian Yang

Institution: Hunan University

Language: English

Topic: Geotechnical Engineering and Soil Stabilization

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: green

Funder: National Natural Science Foundation of China