A typical modulus test setup for an aggregate pier foundation incorporates a reaction frame providing vertical resistance above a testing jack that applies load to a steel plate matching the diameter of the aggregate pier. A concrete plug or equivalent material sits directly above the test aggregate pier. Measuring devices mounted on reference beams positioned at least two feet away monitor displacement during the test.
REACTION FRAME TESTING JACK STEEL PLATE OF DIAMETER EQUAL TO AGGREGATE PIER DIAMETER CONCRETE PLUG OR EQUIVALENT TEST AGGREGATE PIER MEASURING DEVICE REFERENCE BEAM 2' MIN.
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