Conclusions
1. As compared with corresponding solutions of the theory of elasticity, significant stress concentration is observed in compacted and loose sandy beds under any vertical load along the central vertical of rectangular plates. The degree of stress concentration depends on the properties of the medium (the density of the sand), the shape of the plate (the relationship between the dimensions of its sides), the external load, and, evidently, on a number of other factors. In the cases under consideration, the stresses increased nearly proportionally to the load (simple loading).
2. Maximum vertical deformations of the sandy bed under small loads occur directly at the lower surface of the plates. As the load increases, maximum deformation appears at a certain depth below the lower surface of the plate. The relation between stresses and relative vertical deformations is nonlinear over the entire range of load variation.
3. The more precisely defined results of study of the stress-strain state of the bed make it possible to evaluate more reliably the validity of existing and newly developed theoretical solutions employed in designing beds from first and second groups of limiting states.
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Additional information
Novosibirsk Civil Engineering Institute. Translated from Osnovaniya, Fundamenty i Mekhanika Gruntov, No. 3, pp. 24–27, May–June, 1981.
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Krivorotov, A.P., Babello, V.A. Results of investigation of the stress state of a sandy bed for rigid plates. Soil Mech Found Eng 18, 117–122 (1981). https://doi.org/10.1007/BF01711215
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DOI: https://doi.org/10.1007/BF01711215