define under reamed piles and states its effectiveness.
Under Reamed Piles Under-reamed piles are a type of deep foundation used to provide support in weak or loose soil conditions. They are essentially a variation of bored piles, where the pile shaft is enlarged or "under-reamed" at specific depths to increase the load-bearing capacity of the pile. An under-ream is a bulb-shaped enlargement of the pile shaft, typically created at one or more levels below the ground surface. The enlargement is designed to anchor the pile more securely in the soil by increasing the surface area, which enhances its capacity to resist lateral and vertical loads. The enlarged section of the pile provides greater resistance to both settlement and lateral forces. Effectiveness of Under-Reamed Piles: Under-reamed piles are particularly effective in the following situations: 1. Weak or Cohesionless Soils : They are commonly used in soils with low bearing capacity, such as clay, silt, or loose sand. The enlarged portion helps to dis...