Steel Designers Manual - TheBestFriend.org

This material is copyright - all rights reserved. Reproduced under licence from The Steel Construction Institute on 12/2/2007
To buy a hardcopy version of this document call 01344 872775 or go to http://shop.steelbiz.org/
Steel Designers' Manual - 6th Edition (2003)
868 Steel piles
and bending strength without affecting its durability. On projects such as river or
estuary crossings, steel piles offer clear advantages, as the soils are typically granular
and waterlogged and unsuitable for satisfactory pile boring. New applications
such as supports and abutments for integral bridges offer more economic construction
methods and the property of compliance under lateral loading that reduces
bending stresses and therefore section requirements.
29.1.2 Types of pile
Steel bearing piles are available in three basic profiles: universal column H-sections,
tubular sections and box piles. In addition steel sheet piles, High Modulus Piles
and Combi-piles can be used to support vertical load as well as a soil retaining
function.
29.1.2.1 Universal bearing piles
Universal bearing piles are H-sections produced on a universal hot rolling mill –
hence their name.They are essentially the same as universal column sections, except
that they have uniform thickness throughout the section. See Fig. 29.1. Universal
column H-piles are made in two basic qualities of steel, grade S275 (yield =
275 N/mm 2 ) and grade S355 (yield = 355 N/mm 2 ) to BS EN 10025. 1 Typical section
sizes are presented in the Appendices.
Steel H-piles are very efficient in providing a large surface area for generating
shaft friction resistance. In any given foundation plan area, a greater number of
steel H-piles can be used in a group with a standard spacing of 2B (or 2 ¥ dia.)
Fig. 29.1 Universal bearing pile