Limiting Pressure on Sandy Foundations of Pavements

Abstract

Abstract The purpose of the article is to determine the limit value of pressure on the sandy foundation of pavement. Such pressure is understood as the first critical load on the soil, which separates the stages of linear and nonlinear deformation of the base. The method of experimental research is testing the base with a hard round stamp. The stamp load was applied in steps, and its value increased until a nonlinear dependence of the shrink from pressure appeared. The tests were performed on a built sandy foundation of pavement on the street Donetskaya in the city of Omsk. For the experiment, 15 points were chosen at which was installed the stamp and loaded with measurement of load and shrink. The test results are processed by methods of mathematical statistics with a reliability of 95%. As a result, a confidence interval is established within which the true value of the limiting pressure on the sand base varies. The value of limiting pressure can be used when designing pavements as a value that limits pressure on the sand base and eliminates shear deformation of the sand.