Experimental Study on Uplift Capacity of Horizontal Circular and Strip Anchor Plates in Two-Layered Cohesionless Soil

Load-displacement behaviour and vertical uplift capacity of horizontal anchor plate embedded in layered sand deposits have been investigated by conducting laboratory model tests. Strip and circular plate anchors are used for this purpose. The layered sand deposits have been prepared with local sand having relative densities 25% (loose sand upper layer) and 65% (medium dense sand with bottom layer), respectively. The medium dense sand layer is always kept closer to the anchor plate and the loose sand layer is kept close to the top surface in the layered sand system. The experiments have been conducted for different embedment ratios with different relative thickness of the dense sand layer (H_dense/H). The maximum displacement of the anchor plate experienced at failure and the uplift capacity of the anchor plate have been found to increase with an increase in the thickness of the dense sand layer (H_dense) at any particular embedment depth (H). The present uplift capacity of the anchor plate determined experimentally is compared well with the available numerical solution.