Limit loads for a shallow anchor/trapdoor embedded in a non-associative Coulomb soil

A theoretical methodology for determining the range of possible plane-strain limit loads acting on an anchor or trapdoor buried within a non-associative Coulomb soil is presented. Solutions are given for shallow anchors and trapdoors underlying both weightless soil with surface load and soil possessing self-weight with no surface load. A method for determining limit loads for combined scenarios is additionally outlined. Solutions are shown to correlate favourably with experimental and finite-element data in the literature.