Improvement of Calculation of Stresses in the Earth Bed and Layers of Road Clothes from Granulated Materials. Part 1. Analysis of Decisions and a New Method

Abstract

The bases of road clothes made of discrete materials have become widespread in the practice of building roads throughout the world. Experimental studies of various loads have shown that an adequate calculation of stresses by formulas in the mechanics of a continuous medium is practically impossible. The article presents a method for modifying stress calculation models, the application of which allows supplementing the solutions of granular medium mechanics and engineering methods with dependencies for calculating the minimum main stress σ3. Following this method, some solutions have been modified, and modified models are given. These models make it possible to calculate the main stresses in a layer of finite thickness in the section on the axis of symmetry of the load distributed along the circular platform. In accordance with this method, in the section along the axis of symmetry of the load at the point z=0 compression pressure occurs, that is ε2=ε3=0. Within the limits of depth change 0<z<∞ the soil operates under conditions of triaxial compression, experiencing lateral expansion strains ε2=ε3<0. At the point z=∞ the ground undergoes uniaxial compression σ2=σ3=0 and ε2=ε3=−μ·ε1.