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<p>The hybrid reinforced earth wall consisting of a soil nail (SN) wall overlain by a mechanically stabilized earth (MSE) wall is gaining popularity, especially in hilly terrains where simultaneous cut and fill situations are encountered. However, due to the depletion of recommended select fill materials, the construction cost of these walls is a major concern. Therefore, this study compares the behavior of hybrid walls having select fill and marginal fill in the MSE wall section. The effects of soil and geometrical parameters were studied on the maximum lateral displacement (<i>δ</i><sub>max</sub>) and factor of safety (FoS) of the hybrid wall. It has been found that using marginal fill to replace select fill can increase the <i>δ</i><sub>max</sub> by 50% and reduce FoS by 20%. The observed failure mechanism was the same for both the fills: local failure plane extending outside the MSE wall and global failure surface originating at toe of SN wall and extending externally beyond the MSE wall. Also, tension cracks were found near the end of SN wall reinforcement, which can further propagate into the MSE wall.</p>

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Finite Element Analysis of Hybrid Reinforced Walls: Influence of Select and Marginal Fills on Stability and Deformation

  • 期刊论文

  • 发表日期：

    2025年8月30日

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  • Ravijeet Ranjan,
  • Ravi Teja Sanivada,
  • Jignesh B. Patel,
  • Vishwas A. Sawant

摘要

The hybrid reinforced earth wall consisting of a soil nail (SN) wall overlain by a mechanically stabilized earth (MSE) wall is gaining popularity, especially in hilly terrains where simultaneous cut and fill situations are encountered. However, due to the depletion of recommended select fill materials, the construction cost of these walls is a major concern. Therefore, this study compares the behavior of hybrid walls having select fill and marginal fill in the MSE wall section. The effects of soil and geometrical parameters were studied on the maximum lateral displacement (δmax) and factor of safety (FoS) of the hybrid wall. It has been found that using marginal fill to replace select fill can increase the δmax by 50% and reduce FoS by 20%. The observed failure mechanism was the same for both the fills: local failure plane extending outside the MSE wall and global failure surface originating at toe of SN wall and extending externally beyond the MSE wall. Also, tension cracks were found near the end of SN wall reinforcement, which can further propagate into the MSE wall.