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<p>Micropile reinforcement has emerged as an effective technique in improving the stability of a slope. A clayey embankment slope of height 10&#xa0;m, underlain by a sandy soil layer, was considered for the investigation. The slope was strengthened by the insertion of micropiles with eight different configurations. Three-dimensional nonlinear finite element investigations were carried out to investigate the performance of the micropile-reinforced slope under static and seismic loading conditions. A substantial enhancement of 30% in the load-carrying capacity of the slope with different configuration settings of micropiles was observed. Next, the effects of the configurations of the micropiles on the critical earthquake coefficient of the slope were studied through pseudo-static analyses. An increase of 33% − 56% was observed in the critical horizontal seismic coefficient of the slope with different configurations of micropiles, compared to the unreinforced case. Further, the efficacy of the micropile configurations was presented for earthquakes having widely varying strong ground motion parameters. The crest acceleration and deformation were reduced by more than 20% and 13%, respectively, for the micropile-reinforced slopes compared to the unreinforced slope. Further, configurations with micropiles towards the crest are found to be more effective in reducing the seismic deformations of the slope.</p>

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Investigation on Seismic Performance of Micropile-Reinforced Soil Slope with Different Configurations

  • 期刊论文

  • 发表日期：

    2026年5月28日

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  • Sumit Kumar,
  • Abhijit Anand,
  • Rajib Sarkar,
  • Lohitkumar Nainegali

摘要

Micropile reinforcement has emerged as an effective technique in improving the stability of a slope. A clayey embankment slope of height 10 m, underlain by a sandy soil layer, was considered for the investigation. The slope was strengthened by the insertion of micropiles with eight different configurations. Three-dimensional nonlinear finite element investigations were carried out to investigate the performance of the micropile-reinforced slope under static and seismic loading conditions. A substantial enhancement of 30% in the load-carrying capacity of the slope with different configuration settings of micropiles was observed. Next, the effects of the configurations of the micropiles on the critical earthquake coefficient of the slope were studied through pseudo-static analyses. An increase of 33% − 56% was observed in the critical horizontal seismic coefficient of the slope with different configurations of micropiles, compared to the unreinforced case. Further, the efficacy of the micropile configurations was presented for earthquakes having widely varying strong ground motion parameters. The crest acceleration and deformation were reduced by more than 20% and 13%, respectively, for the micropile-reinforced slopes compared to the unreinforced slope. Further, configurations with micropiles towards the crest are found to be more effective in reducing the seismic deformations of the slope.