METHOD AND APPARATUS FOR CREATING AGGREGATE PIERS USING A HOLLOW MANDREL WITH UPWARD FLOW RESTRICTORS

A system and method for installing aggregate piers is provided. A cylindrical hollow mandrel is driven to a desired depth. Aggregate is fed through the mandrel in steps. The mandrel is raised and driven to tamp the aggregate. Physical members in a tamping head of the mandrel allow aggregate to remai...

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Bibliographic Details
Main Authors WISSMANN, Kord J, METCALFE, Brian
Format Patent
LanguageEnglish
French
German
Published 08.02.2017
Subjects
EMBANKMENTS
EXCAVATIONS
FIXED CONSTRUCTIONS
FOUNDATIONS
HYDRAULIC ENGINEERING
SOIL SHIFTING
UNDERGROUND OR UNDERWATER STRUCTURES
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Summary:A system and method for installing aggregate piers is provided. A cylindrical hollow mandrel is driven to a desired depth. Aggregate is fed through the mandrel in steps. The mandrel is raised and driven to tamp the aggregate. Physical members in a tamping head of the mandrel allow aggregate to remain in a cavity formed by the mandrel, and prevent aggregate from entering the mandrel during driving.
Bibliography:Application Number: EP20080795798