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<p>Retaining walls have proved to provide excellent results in stabilising embankments for transportation corridors. However, limited studies have been performed to study the role of retaining walls in providing stabilization to retained structures under the influence of seismic forces. This study attempts to integrate field/experimental data and numerical modelling to design and examine the performance of retaining walls in mitigating seismic-induced instabilities in road embankments, to be constructed in an ongoing project of National Highway construction in Nagaland, India. With respect to considered ground accelerations, the retaining wall is examined considering factors such as liquefaction potential, dynamic stresses, resultant deformation, and pore water pressure development. Induced acceleration and velocity are studied to understand the dynamic response of stabilized embankments and provide insights into the propagation of seismic waves and the resulting stresses. The stem and toe of the retaining wall attenuated the input seismic acceleration by about 25% and cyclic stress ratio by 91% as compared to unreinforced embankment sections. The incorporation of drainage provision limited the induced stresses in the road embankment in the range of 40&#xa0;kPa-80&#xa0;kPa. Designing a retaining wall with an expanded base and shear key aided in restricting horizontal and vertical differential settlements to 0.004&#xa0;m and 0.0025&#xa0;m, respectively (approximately). In addition to stress distribution and dynamic analysis, Newmark analysis was conducted to underscore the significance of considering multiple seismic factors for designing and constructing retaining walls for road embankments to contribute to safer and more resilient infrastructure development in seismically active regions.</p> Graphical Abstract <p></p>

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Dynamic Response of Retaining Wall Optimizing Stress Distribution and Stability of Reinforced Highway Embankments in Seismic Prone Area

  • 期刊论文

  • 发表日期：

    2025年4月25日

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  • Uzma Azim,
  • Siddhartha Sengupta

摘要

Retaining walls have proved to provide excellent results in stabilising embankments for transportation corridors. However, limited studies have been performed to study the role of retaining walls in providing stabilization to retained structures under the influence of seismic forces. This study attempts to integrate field/experimental data and numerical modelling to design and examine the performance of retaining walls in mitigating seismic-induced instabilities in road embankments, to be constructed in an ongoing project of National Highway construction in Nagaland, India. With respect to considered ground accelerations, the retaining wall is examined considering factors such as liquefaction potential, dynamic stresses, resultant deformation, and pore water pressure development. Induced acceleration and velocity are studied to understand the dynamic response of stabilized embankments and provide insights into the propagation of seismic waves and the resulting stresses. The stem and toe of the retaining wall attenuated the input seismic acceleration by about 25% and cyclic stress ratio by 91% as compared to unreinforced embankment sections. The incorporation of drainage provision limited the induced stresses in the road embankment in the range of 40 kPa-80 kPa. Designing a retaining wall with an expanded base and shear key aided in restricting horizontal and vertical differential settlements to 0.004 m and 0.0025 m, respectively (approximately). In addition to stress distribution and dynamic analysis, Newmark analysis was conducted to underscore the significance of considering multiple seismic factors for designing and constructing retaining walls for road embankments to contribute to safer and more resilient infrastructure development in seismically active regions.

Graphical Abstract