Numerical Study on Static Interaction of Closely Spaced Horizontal Square or Rectangular Ground Anchors in c-ϕ Soil

Abstract

In the present study, an effort is made to explore the static interaction of two closely-spaced horizontal square or rectangular ground anchors embedded in homogenous c-ϕ soil deposit at different depths. The analysis is performed by using three dimensional finite difference program FLAC 3D . Each anchor is subjected to equal displacement to obtain the ultimate uplift capacity. The soil is assumed to obey the Mohr–Coulomb failure criterion. The behavior of single isolated anchor is obtained first to explore the interaction effect between two nearby anchors. A parametric study is performed by varying the clear spacing (S) between the anchors at different embedment ratios (λ). The interaction phenomenon of two closely placed anchors is expressed in terms of the efficiency factor (ξ u) at different clear spacing between the anchors.