Method and apparatus for raising and supporting a foundation

Hydraulic and earth engineering – Foundation – Underpinning

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405233, E02D 2748

Patent

active

047877790

ABSTRACT:
A method and apparatus for raising and supporting a foundation where a hole is excavated beneath the foundation, one or more pipes are driven into the earth at diverging angles to form a piling, and a jack is placed in the hole above the piling and beneath the foundation. A self-hardening fluid is forced into the jack to raise the foundation. A jack is created from a pair of hollow cylinders, each having a single closed end, and slidably engaged open end to open end for vertical movement when a self-hardening fluid is forced through an opening formed in one of the cylinders. The jack may be formed of an opened-top cylinder having a concrete piston formed inside that is raised by pumping grout through an opening in the cylinder and into a void under the piston.

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patent: 4338047 (1982-07-01), Davis
patent: 4507069 (1985-03-01), Murray et al.
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patent: 4563110 (1986-01-01), Langenbach, Jr. et al.
patent: 4567708 (1986-02-01), Haekkinen
patent: 4591466 (1986-05-01), Murray et al.

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