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INFLUENCE OF SOIL MODULUS ON THE BEHAVIOR OF CYLINDERS BURIED IN SAND.
Technical rept. Nov 66-Feb 67,
NAVAL CIVIL ENGINEERING LAB PORT HUENEME CALIF
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Experimental and theoretical results are given that provide information on the influence of soil properties on the behavior of buried cylinders whose axes are parallel to the surface. Sand type, sand density, and cylinder stiffness were varied in 12 static tests on 5-inch-diameter thin-metal cylinders. The stiffness of these cylinders was less than that of others in the literature for which complete information on soil properties was available. The main contribution of the research presented is that it provides a unified method for determining deflections and the critical buckling load, both of which are based on the one-dimensional confined compression modulus measured in a standard laboratory test. This has not been done heretofore. Also, a relation for arching across buried cylinders is given which permits computation of the thrust at the haunches. Another feature of the work is the development of a matrix solution for determining the interface pressure distribution from measurements of strains in the cylinder. Thus, in effect, the cylinders can be used as biaxial soil pressure sensors. Author
APPROVED FOR PUBLIC RELEASE