The impact of using stone column on soft soil creep behavior

Abstract

The stone column technique is an effective method to increase the strength of soft cohesive soil, which results in a reduction in foundation settlement and an increase in bearing capacity. The topic of restraining creep settlement through the use of stone columns techniques has gained increasing attention and consideration; because stone columns are widely used to treat soft soil deposits, caution should be exercised in estimating creep settlement. Brown clayey soil from a location near Al-Rashid Camp, south of Baghdad was chosen for study. The following laboratory tests physical properties, consolidation test, compaction test, vane shear test, and triaxial test were conducted and use the Plaxis-3D 2020 software for analysis of finding. We discovered that increasing the L/D of the floating stone column had a negligible effect on creep settlement. Increasing the L/D of end bearings does not affect creep settlement, and the creep settlement began at the primary settlement. L/D affected the improvement factor (n) of creep settlement in floating cases, but this effect was not observed in end-bearing stone columns. The standard creep coefficient's n values in floating and end bearing conditions were more significant than the low creep coefficient's n values in forwarded conditions. The stress in the floating stone column was uniformly distributed along its length. In contrast, the stress effect on the end-bearing stone column was limited to the stiffness layer and was unaffected by the column's length. The embankment's maximum horizontal displacement occurred on the edge.