Apparatus for load testing foundation shafts

Details Apparatus for load testing foundation shafts Apparatus for load testing foundation shafts

1976-11-22

1978-04-04

Ruehl, Charles A.

Measuring and testing

Hardness

By penetrator or indentor

G01N 3324

Patent

active

040819922

ABSTRACT:
A reaction tie-down system for axially load testing foundation members is provided by removably interconnecting a plurality of high tensile strength bar members from a base plate within a concrete anchor shaft through an adaptor to load-carrying girders. Hydraulic jacks apply an axial load between the foundation shaft which is to be tested and the girders. The reaction force to this axial load is provided by the reaction tie-down system wherein the force is transmitted from the girder through the rods to the anchor shafts and through the anchor shafts to the surrounding soil. The bar members are arranged in a circular pattern for flexibly matching the number of bar members to the anticipated test load. The bar members threadly mate with the base plate and the adaptor and the bar members are removably encased within the concrete anchor shaft by flexible sheaths. All the components are, therefore, reusable except the embedded base plate assembly and flexible sheaths.

REFERENCES:
patent: 2697937 (1954-12-01), Richards, Jr.
patent: 3054285 (1962-09-01), Rousen
patent: 3946601 (1976-03-01), Yizhaki

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