Experimental and Analytical Study on Uplift Capacity of Square Horizontal Anchor in Cohesionless Soil

Abstract

Ground anchors are applicable to Sea-walls, transmission tower, buried pipeline, etc. in which they are subjected to uplift force or tension. The resistance of such uplift or pullout force is obtained using theory of plasticity. The pullout capacity of soil anchor is due to shear strength of surrounding soil, embedded depth, dead weight of plate, etc. Meyerhof and many other has given formulation for such allowable capacity. Many testing methods have been used to study the behavior of anchors (in both sand & clay), including field tests, laboratory tests, numerical analyses (Finite element method), & analytical solutions. Laboratory experiments were performed on relatively large-scale model to find out Ultimate uplift capacity Qu and breakout factor Nq of cohesion less medium. The load-displacement relationship, variation in peak uplift load with varying embedment ratios, and variation in breakout factor with embedding ratio were the core issues of the experiment. Results are compared with the analytical methods to analyze relevance of empirical formula’s results are higher or lower than actual value so it is useful for design of soil anchor plates of Laboratory test shows that as the Embedment ratio & Relative density increases the Uplift load increase. Meyerhof and Adam’s theory give nearer value of ultimate uplift load for loose sand but it gives higher value of ultimate uplift load in medium dense & dense condition of soil in compared with model test’s results in laboratory.