Scholarlink

<p>This paper focuses on field measurements, as well as analytical and numerical analyses conducted for a metro depot in Chennai, India, that employs prefabricated vertical drains (PVD) in conjunction with surcharge. The PVDs were installed in a triangular arrangement and extended to the bottom of the soft clay layer. Two PVD spacings of 1.2&#xa0;m and 1.5&#xa0;m were selected based on the site zone. Three surcharge fill heights—2.2&#xa0;m, 3.0&#xa0;m, and 3.6&#xa0;m—were utilized, with the soil having a unit weight of 17 kN/m<sup>3</sup>. The surcharge was removed after 125&#xa0;days, resulting in a maximum average settlement of approximately 150&#xa0;mm. The monitoring data and analytical calculations confirmed the completion of primary consolidation. Both numerical simulations using commercial software and an analytical approach based on settlement and flow variables were employed to evaluate the scheme’s effectiveness. The analysis showed that the soft marine clay exhibited a high horizontal drainage capacity (<i>C</i><sub>r</sub>/<i>C</i><sub>v</sub> ratio between 4 and 22), which led to rapid settlement at the project site. Field measurement data were back-calculated to derive the consolidation settlement parameters. These findings could significantly impact future designs for ground improvement in the coastal region of South India.</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

Ground Improvement by Prefabricated Vertical Drains and Surcharge for a Metro Depot Constructed on Marine Deposit

  • 期刊论文

  • 发表日期：

    2025年3月13日

查看全文
  • M. Vinoth

摘要

This paper focuses on field measurements, as well as analytical and numerical analyses conducted for a metro depot in Chennai, India, that employs prefabricated vertical drains (PVD) in conjunction with surcharge. The PVDs were installed in a triangular arrangement and extended to the bottom of the soft clay layer. Two PVD spacings of 1.2 m and 1.5 m were selected based on the site zone. Three surcharge fill heights—2.2 m, 3.0 m, and 3.6 m—were utilized, with the soil having a unit weight of 17 kN/m3. The surcharge was removed after 125 days, resulting in a maximum average settlement of approximately 150 mm. The monitoring data and analytical calculations confirmed the completion of primary consolidation. Both numerical simulations using commercial software and an analytical approach based on settlement and flow variables were employed to evaluate the scheme’s effectiveness. The analysis showed that the soft marine clay exhibited a high horizontal drainage capacity (Cr/Cv ratio between 4 and 22), which led to rapid settlement at the project site. Field measurement data were back-calculated to derive the consolidation settlement parameters. These findings could significantly impact future designs for ground improvement in the coastal region of South India.