ABSTRACT
In this paper, we use ABAQUS finite element numerical analysis software to theoretically study the damage model of the expanded head anti-floating anchor rod under tension in pulverized clay. The results show that: 1) the mode of anchor rod under tension damage is related to the burial depth ratio L1/D2, when L1/D2≤2, the anchor rod undergoes shallow burial damage; when L1/D2≥6, the anchor rod undergoes deep burial damage; when 2<L1/D2<6, the anchor rod undergoes mixed damage. 2) When the burial depth of anchor rod L1 is greater than 6m, the ellipse formed by the maximum principal stress cloud around the anchor rod is roughly 4D1 in height and 5D1 in width. 3) When the anchor is in the elastic stage, the load-displacement curves of shallowly buried anchor, transitional anchor, and deeply buried anchor are sloped straight lines with the same slope; after the anchor enters the plastic stage, the slope of the load-displacement curves decay at different rates for anchor rods with different burial depths. 4) The tensile damage of the deeply buried anchor rod roughly goes through the elastic stage, the plastic zone formation stage, the plastic zone soil strengthening, and the range expansion stage.
