Publication Abstract

Proceedings - Fifth International Conference & Exhibition on Piling and Deep Foundations, 1994, Bruges, Belgium, (DFI)

Design guidelines for screw anchors
C.A. Carville & R.W. Walton

The screw anchor is a deep foundation member consisting of a steel shaft with helical plates welded to the shaft. Screw anchors are installed into the soil using mechanical rotational force, by adding extensions as the assembly advances. Once installed, the anchor has bearing capacity inboth tension and compression. For over 70 years, screw anchors have been used by the utility industry for power pole guying, transmission tower foundation underpinning and pipeline supports. Today, the general construction industry is discovering and using screw anchors for a much wider variety of applications. This paper provides information about screw anchor installation criteria as they relate to screw anchor design. It is intended that this discussion will provide the engineer with important insights and case histories so that he can work more effectively with contractors in the evaluation, design and implementation of screw anchor projects.

 article #782; publication #36 (IC-1994)