Undrained uplift capacity of deeply embedded strip anchors in non-uniform soil

Foundations of offshore wind turbines: A review

“…The suction pressure in sand with silt layers appeared to be independent Although many studies have examined bearing capacity and installation-related issues surrounding suction bucket foundations in different soil types, further research is needed into the effect of typical loading conditions on bucket foundation behaviour. Many studies [126][127][128][129][130][131][132][133][134][135][136][137][138][139] have considered the effect of anchor geometry on uplift capacity, the geometries including strip, rectangular, and circular anchors; anchor uplift capacity relates to the anchor response to loading normal to the bearing surface. However, the studies encountered problems from soil material nonlinearity, anchor-soil interface non-linearity, and large deformation of soil.…”

“…Researchers [126][127][128][129][130][131][132][133][134][135][136][137][138][139] have examined the influence of anchor embedment depth, anchor-soil interface friction, breakaway conditions, anchor inclination angle, soil overburden pressure ratio, and soil profile.…”

“…where u is anchor capacity, u is average pressure, is anchor area, u is undrained shear strength at embedment depth, and c is bearing capacity factor. In practice, the uplift bearing capacity factor c may be determined from plastic limit analysis [126,129,130,135] or FEM simulation [128,[131][132][133][134][136][137][138][139]. c is a function of embedment ratio, shape of flukes (i.e.…”

“…Many investigations have examined anchor uplift bearing capacity factors in uniform soil and soil with linearly increasing shear strength, and anchor horizontal and rotational capacities(see e.g. Rowe and Davis[128], Merifield et al[129,130], Song and Hu[131], Song et al[132], Wang et al[133], Yu et al[134], Yu et al[135], Chen et al[136], Tho et al[137] and Wu et al[138,139]).…”

Experimental study of pullout capacity of plate anchors shallowly embedded in hydrate bearing sediments

“…This factor increases with an increase in embedment depth until it becomes constant beyond a critical embedment depth, indicating a transition from "shallow anchor behaviour" to "deep anchor behaviour". In addition to the anchor embedment and geometry, various soil conditions have been examined, such as sands of various densities, and clays with uniform strength (Thorne et al, 2004) and linearly increasing strength (Khatri and Kumar, 2009;Tho et al, 2014;Yu et al, 2015). However, plate-type anchors' performance in MH bearing sediments remains to be experimentally examined.…”