ANALYSIS THE IMPACT OF VARIATIONS SHAPE AND DIMENSIONS DRIVEN PILE ON THE BEARING CAPACITY IN CLAY SOIL

Abstract

The foundation is a crucial component of any structure because it distributes the building's load to the solid soil beneath. For the Pagerwojo-Sidoarjo Hospital project, a pile foundation was selected due to its advantages, such as guaranteed concrete quality and quicker implementation compared to a drilled foundation. This study aims to analyze the differences in the bearing capacity of square and spun pile foundations using the Mayerhoff and L'Court methods. The analysis focuses on saturated clay soil and examines variations in the dimensions of circular (30–50 cm) and square (30×30 cm to 50×50 cm) foundations, at depths ranging from 35 m to 55 m. Calculations from both methods indicate that square foundations consistently exhibit a higher bearing capacity than circular foundations when assessed at the same depth and dimensions. The increase in bearing capacity is directly proportional to both the dimensions and depth of the piles, which is further influenced by the enhanced soil consistency found in deeper layers. According to our calculations, the bearing capacity of a 50 cm diameter, 35 m deep circular pile, based on N-SPT data, is 536 kN, while the bearing capacity for a square pile of the same dimensions is 683 kN. Although technical recommendations favor the use of square foundations to optimize bearing capacity, it is essential to further evaluate factors such as settlement, cost, and ease of implementation in the field.

Keywords: allowable bearing capacity, circular pile, driven Pile, , square pile,