Accession Number : AD0484717

Title :   AN EXPERIMENTAL INVESTIGATION OF THE ARCHING PHENOMENON OCCURRING OVER A BURIED RECTANGULAR PLATE.

Descriptive Note : Final rept. Jul 64-Dec 65,

Corporate Author : ILLINOIS UNIV AT URBANA DEPT OF CIVIL ENGINEERING

Personal Author(s) : Mosborg, R. J. ; Talda, P. M.

Report Date : JUN 1966

Pagination or Media Count : 100

Abstract : This report presents the results of an experimental investigation of soil-structure interaction and its effect on the pressure transmitted to a horizontally buried flat plate. The primary objective of this effort was to determine the validity and range of applicability of an analytical arching theory developed to predict the pressures developed on a flat plate buried horizontally in a cohesionless soil. Static and dynamic tests up to 500 psi peak overpressures were conducted in a 2 ft. diameter cylindrical test tank having an adjustable bottom which permitted variations in depth of burial to plate width ratios from 0.5 to 3.0. The tank bottom housed a long rectangular rigid plate supported by springs which allowed the plate to deflect vertically under load. These springs could be changed to investigate the effect of support stiffness on plate pressure. All tests were conducted on two sands, one with smooth rounded grains (Minnesota sand) and one with angular grains (Wabash sand), at various values of relative density. In all tests, data were recorded for overpressure, plate pressure, and plate deflection. The results indicate that greater arching develops as the burial depth of a given size plate is increased. The amount of arching developing over the plate is affected by the relative density as well as the type of soil and stiffness of the plate supports. In general, for a given air pressure more load was transmitted to the buried plate in the dynamic tests than in the comparable static tests. (Author)

Descriptors :   (*UNDERGROUND STRUCTURES, SOILS), (*SOILS, LOAD DISTRIBUTION), SHEAR STRESSES, SAND, PRESSURE, FLAT PLATE MODELS, STRAIN(MECHANICS), FRICTION, STATICS, SPRINGS, DEFLECTION.

Subject Categories : Structural Engineering and Building Technology

Distribution Statement : APPROVED FOR PUBLIC RELEASE