Design and Construction of Drilled Piers
|Publication Date:||1 January 1993|
This report deals with design and construction of drilled pier foundations which are constructed by digging, drilling or otherwise excavating a hole in the earth which is subsequently filled with plain or reinforced concrete. Engineers and constructors have used the terms caissons, foundation piers, bored piles, drilled shafts, subpiers, and drilled piers interchangeably. Only the term drilled pier will be used in this report.
Structural design and construction of drilled pier foundations are the primary objectives of this report. Yet geotechnical considerations are vital because variations in the soil properties have a critical influence on design and construction. Therefore, relevant aspects of soil mechanics are also discussed herein. For the successful design and construction of the drilled pier foundation, it is necessary that a reliable set of data on the supporting earth be obtained. For this task, combined attention and cooperation of the Geotechnical Engineer, Structural Engineer and constructor is essential because limitations of construction often govern the design.
This report is intended primarily for use in building construction, but the sections on construction methods, inspection and testing are equally applicable to bridge and other construction.