Scholarlink

<p>This study explores the stability of retaining walls with unsaturated backfill under rainfall infiltration using FLAC 2D numerical simulations. Over recent decades, changing climatic patterns, particularly irregular rainfall, have heightened the need to understand their performance under variable environmental conditions. Present research addresses this gap by examining how rainfall influences unsaturated soil behavior, focusing on interactions between soil saturation, structural response, and geotechnical stability. The methodology employs hydro-mechanical coupling within FLAC 2D, a finite difference-based software for modeling geotechnical problems. The approach utilizes a two-phase flow model to simulate wetting and non-wetting fluid movement, incorporating the van Genuchten model to characterize matric suction and permeability. Spatial variability is also integrated to study soil heterogeneity. Results indicate that prolonged rainfall increases soil saturation, reducing suction and elevating active earth pressure, while updating porosity and permeability, implemented via FISH programming in FLAC, accelerates saturation while reducing wall displacement compared to constant porosity models. Further, the incorporation of spatial variability introduces randomness in saturation patterns, reflecting natural soil uncertainties. These findings suggest improved design practices for rainfall-prone regions, enhancing safety and stability. </p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Numerical Simulation of Retaining Wall Under Rainfall Infiltration with Variable Permeability

  • 期刊论文

  • 发表日期：

    2025年6月11日

查看全文
  • Deepak Kumar Singh,
  • Siddharth Mehndiratta,
  • Bhawarnab Gautam,
  • Pankaj Gupta

摘要

This study explores the stability of retaining walls with unsaturated backfill under rainfall infiltration using FLAC 2D numerical simulations. Over recent decades, changing climatic patterns, particularly irregular rainfall, have heightened the need to understand their performance under variable environmental conditions. Present research addresses this gap by examining how rainfall influences unsaturated soil behavior, focusing on interactions between soil saturation, structural response, and geotechnical stability. The methodology employs hydro-mechanical coupling within FLAC 2D, a finite difference-based software for modeling geotechnical problems. The approach utilizes a two-phase flow model to simulate wetting and non-wetting fluid movement, incorporating the van Genuchten model to characterize matric suction and permeability. Spatial variability is also integrated to study soil heterogeneity. Results indicate that prolonged rainfall increases soil saturation, reducing suction and elevating active earth pressure, while updating porosity and permeability, implemented via FISH programming in FLAC, accelerates saturation while reducing wall displacement compared to constant porosity models. Further, the incorporation of spatial variability introduces randomness in saturation patterns, reflecting natural soil uncertainties. These findings suggest improved design practices for rainfall-prone regions, enhancing safety and stability.