Effect of Slenderness Ratio on Group Efficiency in Gypseous Soil: Effect of Slenderness Ratio on Group Efficiency in Gypseous Soil

Keywords

Piles
foundation
gypseous soil
group
efficiency

Abstract

The paper investigates the impact of the slenderness ratio (L/D) on the group efficiency of a four-pile configuration in gypseous soil, emphasizing L/D ratios of 10, 20, and 30. Employing steel pipes with a diameter of 15mm and a wall thickness of 1.2 mm, the piles underwent surface roughening using sandpaper to simulate realistic field conditions and enhance friction with the surrounding soil. The group, arranged in a square pattern, was subjected to vertical loading. The test apparatus featured a cap for uniform load distribution. Dry and soaked conditions were considered for load-settlement behavior analysis at a constant pile spacing of 4D. In the dry state, the group pile load demonstrated a proportional increase with increased L/D ratios, due to increased embedded depth, surface area, loading level, lateral earth pressure, and bearing capacity factor. A nearly linear relationship between ultimate load and L/D ratio was observed.

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