A laboratory Study on Reinforced Expansive Soil with Granular Pile Anchors

Granular Pile Anchor (GPA) considers one of the solution foundation techniques, designed to mitigate the lifting of the sole resulting from expansive soils. This study work is to investigate the uplift movement response of (GPA) in expansive soil. The laboratory tests have been performed on an experimental. The effects of several parameters, such as length (L) of (GPA) and diameter (D), the thickness (H) of expansive clay layer and the existence sandy soil layer are investigated. The results evidenced the effectiveness and ability of (GPA) to reduce the lifting movement of the expansive soil and presented that the lifting movement can be decreased with rising length to some extent and the (GPA) diameter. The lifting movement of (GPA-Foundation System) is controlled by (3) separate variables, these are [(L / H) and (L / D)] ratios and diameter. The lifting movement can be decreased by up to (47%) if (GPA) is embedded in layer of expansive soil at (L / H = 1), and by (83%) if (GPA) is in expansive soil and extensive sandy soil is embedded at (L / H = 1.4) with the similar (GPA) diameter and foundation.