Axial Capacity of Hydraulically Jacked Micropiles for Underpinning

by Howard A. Perko, Ph.D., P.E.
Director of  Engineering for Magnum Piering
June 14, 2002

Push pier, push pile, and resistance pier are some of the trade names. They refer to hydraulically-jacked steel-pipe micropiles used for underpinning. The term steel push pier will be used herein. There are several different manufacturers of
steel push piers including Magnum Piering, RamJack, and Atlas Systems. Steel push piers can be installed using heavy machinery for construction of new structures This paper is focused on piers used exclusively for underpinning and repair of existing structures.

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Abstract Papers

Micropiles

Description

Push pier, push pile, and resistance pier are some of the trade names often applied to hydraulically-jacked, steel-pipe micropiles used for underpinning. For convenience the term steel push pier will be used herein. There are several different manufacturers of
steel push piers including Magnum Piering, RamJack, and Atlas Systems. Although steel push piers can be installed using heavy machinery for construction of new structures, this paper is focused on piers used exclusively for underpinning and repair of existing structures.

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