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Disclaimer: This tool is intended for use by the APEC Consultancy team for preliminary geotechnical calculations only. The developers assume no liability for design decisions made based on the output of this application. All results must be verified by a qualified geotechnical or structural engineer before use in any project.

Deadman Anchor — Holding Capacity

Ultimate and allowable holding capacity of a rectangular deadman anchor plate in sand or clay per Das & Sivakugan (2019, 9th SI) §18.18–18.20, pp. 804–811.

Scope of this first build: shallow rectangular anchor plates in homogeneous sand (Ovesen-Stromann, Das §18.19) or homogeneous clay (Mackenzie/Tschebotarioff, Das §18.20). Grouped anchors, inclined anchors, and layered soil profiles are deferred.

Anchor Geometry

Soil Parameters

References & Methodology

  1. Das, B.M. & Sivakugan, N. (2019). Principles of Foundation Engineering, 9th Edition, SI. Cengage Learning. §18.17 Anchors (p. 802); §18.18 Holding Capacity of Deadman Anchors (p. 804); §18.19 Holding Capacity of Anchor Plates in Sand (p. 804, Fig. 18.29); §18.20 Holding Capacity of Anchor Plates in Clay (p. 811); §18.21 Ultimate Resistance of Tiebacks (p. 811).
  2. Poulos, H.G. & Davis, E.H. (1980). Pile Foundation Analysis and Design. John Wiley & Sons. Ch. 7 — Lateral Loading of Single Piles: soil-structure interaction background for the plate reaction and failure wedge concept used in anchor capacity analysis.
  3. Ovesen, N.K. & Stromann, H. (1972). Design method for vertical anchor slabs in sand. Proc. Specialty Conf. on Performance of Earth and Earth-Supported Structures, ASCE, Purdue University, 1481–1500.
  4. Mackenzie, T.R. (1955). Strength of Deadman Anchors in Clay. M.Sc. thesis, Princeton University.
  5. Tschebotarioff, G.P. (1973). Foundations, Retaining and Earth Structures, 2nd Edition. McGraw-Hill. Anchor plate in clay.
  6. Bowles, J.E. (1996). Foundation Analysis and Design, 5th Edition, Ch. 14. McGraw-Hill.