This article describes the use of 3DFoundation v. 2.1 (Plaxis, 2008) to compute
the undrained capacity of a suction anchor in clay. The objective of this study was to
evaluate the performance of 3DFoundation for analyzing this particular problem
by comparing the 3D Foundation results with results from other software including
PLAXIS 2D and NGI in-house codes. The effects of mesh fineness, use of interface elements
and the wall roughness on the calculated capacity were also studied. There are several
other aspects in the design of skirted anchors in clay which is not covered in this article.