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<p>The present study focuses on understanding the behaviour of contiguous pile walls (CPWs) subjected to surcharge loading placed at different locations on the backfill with varied soil densities under staged excavation through a series of numerical simulations. The overall performance of the wall was determined based on lateral deflection, vertical settlement of surcharge, bending moment, and lateral earth pressure on the wall. A novel 2D plane strain numerical modelling technique incorporating gap correction factor ‘<i>k</i>’ has been proposed using Plaxis 2D. It is validated to simulate the field response of a scaled-up prototype model. The parametric study examined the effect of excavation depth, surcharge distance, surcharge magnitude, diameter, length of piles, and gap spacing between piles on the overall response of the contiguous pile wall. An optimisation study has been performed to check the viability of mitigation measures using anchor-supported contiguous pile walls with a capping beam. Measures have shown improvement in bending capacity and wall performance using anchors.</p>

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Performance of Contiguous Pile Wall with Mitigation Measures Considering Plane Strain Condition

  • 期刊论文

  • 发表日期：

    2025年2月19日

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  • Aradhana Mishra,
  • Vishwas A. Sawant

摘要

The present study focuses on understanding the behaviour of contiguous pile walls (CPWs) subjected to surcharge loading placed at different locations on the backfill with varied soil densities under staged excavation through a series of numerical simulations. The overall performance of the wall was determined based on lateral deflection, vertical settlement of surcharge, bending moment, and lateral earth pressure on the wall. A novel 2D plane strain numerical modelling technique incorporating gap correction factor ‘k’ has been proposed using Plaxis 2D. It is validated to simulate the field response of a scaled-up prototype model. The parametric study examined the effect of excavation depth, surcharge distance, surcharge magnitude, diameter, length of piles, and gap spacing between piles on the overall response of the contiguous pile wall. An optimisation study has been performed to check the viability of mitigation measures using anchor-supported contiguous pile walls with a capping beam. Measures have shown improvement in bending capacity and wall performance using anchors.