Question: A plate - bearing test using a 3 0 - inch diameter rigid plate was made on a subgrade as well as 1 0 inches

A plate-bearing test using a 30-inch diameter rigid plate was made on a subgrade as well as 10 inches of gavel base course. The unit load required to cause settlement of 0.2 inch was 10 psi and 40 psi, respectively. Determine the required thickness of base course to sustain a 50,000-pound tire, 100-psi pressure, and maintain a deflection of 0.2 inch.
A plate - bearing test using a 3 0 - inch

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