Prefabricated vertical drain (PVD) is typically used to expedite the natural course of action of soil consolidation in soft soils. PVDs enhance shear strength and stiffness, reduce settlement, and provide a cost-effective, environmentally friendly solution for stabilizing soft soils. This paper reviews recent studies on the combined piled raft foundation (CPRF) on very soft compressible soil improved by prefabricated vertical drain (PVD). Research has emphasized their role in reducing settlement and influencing overall foundation behavior, particularly in analyzing design parameters, pile configurations, and loads shared by piled raft systems. To align with geo-environmental sustainability goals, nondegradable PVD materials must be replaced with biodegradable options such as jute, coir, and straw. However, the literature on the practical application and effectiveness of sustainable PVD materials remains limited. Current studies review the different usability of the PVD and often oversimplify it as a drainage element, neglecting its complex interaction with soil columns, which is essential consideration in engineering practice. The available literature related to consolidation shows very few attempts to provide adoptive procedures and comments on the use of sustainable vertical drainage forms in the foundation system. The goal of this work is to optimize CPRF design by considering parameters such as its stress concentration and pile configuration on PVD-improved soft soil by considering parameters such as type and spacing to identify the sustained behavior of this combination. This study highlights the possibility of combining CPRF and vertical drains to improve weak soil condition in a cost-effective manner.

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Combined Piled Raft Foundation (CPRF) on the Soft Ground Improved Prefabricated Vertical Drain: Review

  • Shweta Sagole,
  • Prasad P. Dahale

摘要

Prefabricated vertical drain (PVD) is typically used to expedite the natural course of action of soil consolidation in soft soils. PVDs enhance shear strength and stiffness, reduce settlement, and provide a cost-effective, environmentally friendly solution for stabilizing soft soils. This paper reviews recent studies on the combined piled raft foundation (CPRF) on very soft compressible soil improved by prefabricated vertical drain (PVD). Research has emphasized their role in reducing settlement and influencing overall foundation behavior, particularly in analyzing design parameters, pile configurations, and loads shared by piled raft systems. To align with geo-environmental sustainability goals, nondegradable PVD materials must be replaced with biodegradable options such as jute, coir, and straw. However, the literature on the practical application and effectiveness of sustainable PVD materials remains limited. Current studies review the different usability of the PVD and often oversimplify it as a drainage element, neglecting its complex interaction with soil columns, which is essential consideration in engineering practice. The available literature related to consolidation shows very few attempts to provide adoptive procedures and comments on the use of sustainable vertical drainage forms in the foundation system. The goal of this work is to optimize CPRF design by considering parameters such as its stress concentration and pile configuration on PVD-improved soft soil by considering parameters such as type and spacing to identify the sustained behavior of this combination. This study highlights the possibility of combining CPRF and vertical drains to improve weak soil condition in a cost-effective manner.