Building roads and bridges is difficult in coastal and delta regions of the world due to the soft clay subsoils’ high compressibility and low shear strength. One of the ground modification methods is vertical Geodrains that have direct effect on early completion of primary consolidation, which brings about the earlier commencement of the next consolidation loading. As a result, maintenance costs are reduced and road embankments can be put into service far sooner than they otherwise could. This novel use of Geodrain shows promise for reducing the possibility of liquefaction in earthquake-prone areas while also fortifying and enhancing the bearing capacity. To compare two PVD installation patterns—triangular and square for stabilizing soft clay, samples of kaolin clay was consolidated in the circular prototype tank with inward radial drainage for the current study project. This research paper's key components are optimizing the drain's design, distance, and PVD installation pattern. In the laboratory, an experimental model is used to further investigate the drain's shape and installation patterns. The natural jute fibers used in this work are economical and environmentally benign, while the vertical drain is made of Polyamide Polyester Geotextile. The study uses soft kaolin clay in a laboratory setting, and each installation pattern's effectiveness is analyzed to assess the rate and size of consolidation at the same time as the rate of strength gain in terms of depth, pressure, and radial location. The findings of the experiment indicated that a soil bed with a triangle pattern grid would take less time than one with a square pattern grid to reach any level of consolidation. When PVD spacing increases, the rate of consolidation lowers; that is, the closer the spacing, the shorter the time needed for 100% consolidation.

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Comparative Analysis of PVD Installation Patterns for Soft Clay Stabilization: A Laboratory Study

  • R. P. Shrivastava,
  • A. V. Shroff,
  • Sweta Dave

摘要

Building roads and bridges is difficult in coastal and delta regions of the world due to the soft clay subsoils’ high compressibility and low shear strength. One of the ground modification methods is vertical Geodrains that have direct effect on early completion of primary consolidation, which brings about the earlier commencement of the next consolidation loading. As a result, maintenance costs are reduced and road embankments can be put into service far sooner than they otherwise could. This novel use of Geodrain shows promise for reducing the possibility of liquefaction in earthquake-prone areas while also fortifying and enhancing the bearing capacity. To compare two PVD installation patterns—triangular and square for stabilizing soft clay, samples of kaolin clay was consolidated in the circular prototype tank with inward radial drainage for the current study project. This research paper's key components are optimizing the drain's design, distance, and PVD installation pattern. In the laboratory, an experimental model is used to further investigate the drain's shape and installation patterns. The natural jute fibers used in this work are economical and environmentally benign, while the vertical drain is made of Polyamide Polyester Geotextile. The study uses soft kaolin clay in a laboratory setting, and each installation pattern's effectiveness is analyzed to assess the rate and size of consolidation at the same time as the rate of strength gain in terms of depth, pressure, and radial location. The findings of the experiment indicated that a soil bed with a triangle pattern grid would take less time than one with a square pattern grid to reach any level of consolidation. When PVD spacing increases, the rate of consolidation lowers; that is, the closer the spacing, the shorter the time needed for 100% consolidation.