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<p>The electrokinetic stabilization is one of the few methods for in-situ modification of fine-grained soils that modifies the physical and chemical properties of the soil by applying an electric field. The geometry of the electrode is one of the variables that, by changing it from a rod to a plate type, can significantly increase the shear modulus of the soil by affecting the entire soil. This study investigates the effect of electrokinetic on the shear modulus of soft clay soil at small, medium and large strains using the bender element and cyclic simple shear tests by changing the voltage (1, 1.5&#xa0;V/cm) and electrode geometry (plate, rod). The results indicated that the Gmax measured with the bender element test increased from 15.91 to 66.3&#xa0;MPa, representing a 4.2 times increase compared to natural soil samples. The results from the cyclic simple shear test for treated clay near the anode, using a plate electrode at a voltage of 1.5&#xa0;V/cm, demonstrated a sixfold increase from 6.38 to 38.089&#xa0;MPa at a shear strain amplitude of 1%. The results show that Gmax obtained in the middle zone of the bender element test increased by 97% when the electrode geometry was changed from rod to plate and the shear modulus obtained near the cathode from the cyclic simple shear test at 1% shear strain amplitude increased by 30% when the voltage was changed from 1 to 1.5&#xa0;V/cm. The findings suggest that increasing the voltage and using the plate electrode increases the shear modulus of clayey soil.</p>

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Shear Modulus Variations in Soft Clay Soil Improved by Electroosmosis Method

  • 期刊论文

  • 发表日期：

    2025年5月21日

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  • Hadis Bibak,
  • Navid Ganjian,
  • Jahangir Khazaei,
  • Amin Bahmanpour

摘要

The electrokinetic stabilization is one of the few methods for in-situ modification of fine-grained soils that modifies the physical and chemical properties of the soil by applying an electric field. The geometry of the electrode is one of the variables that, by changing it from a rod to a plate type, can significantly increase the shear modulus of the soil by affecting the entire soil. This study investigates the effect of electrokinetic on the shear modulus of soft clay soil at small, medium and large strains using the bender element and cyclic simple shear tests by changing the voltage (1, 1.5 V/cm) and electrode geometry (plate, rod). The results indicated that the Gmax measured with the bender element test increased from 15.91 to 66.3 MPa, representing a 4.2 times increase compared to natural soil samples. The results from the cyclic simple shear test for treated clay near the anode, using a plate electrode at a voltage of 1.5 V/cm, demonstrated a sixfold increase from 6.38 to 38.089 MPa at a shear strain amplitude of 1%. The results show that Gmax obtained in the middle zone of the bender element test increased by 97% when the electrode geometry was changed from rod to plate and the shear modulus obtained near the cathode from the cyclic simple shear test at 1% shear strain amplitude increased by 30% when the voltage was changed from 1 to 1.5 V/cm. The findings suggest that increasing the voltage and using the plate electrode increases the shear modulus of clayey soil.