In this case, a given load on the soil surface is usually taken, for example, the normal pressure p (x), and. The methods of the theory of limiting equilibrium are especially effective in the problems of determining the soil pressure on structures, in particular retaining walls. Since in all the problems considered in this chapter, the soil is considered to be in the ultimate stress state, then all the calculation results correspond to the case when the safety factor k3 = 1. Stability Coefficients and Comparison with Experimental Results.The application of invariants of stress and strain states in soil mechanics began with the emergence and development of soil studies in devices that allow for two- and three-axis deformation of samples under conditions of a complex stress state. Invariants of the stressed and deformed states of the soil environment.Loading is a process in which an increase in plastic (residual) deformations occurs, and a process accompanied by a change (decrease). In the study of soils, as well as structural materials, in the theory of plasticity, it is customary to distinguish between loading and unloading. Description of schemes and results of soil tests using invariants of stress and strain states.
To draw up the most general ideas about the behavior of soils under arbitrary loading, it is necessary to study the regularities separately. Elastoplastic deformation of the medium and loading surfaceĭeformations of elastoplastic materials, including soils, consist of elastic (reversible) and residual (plastic).20 years, as a result of numerous experimental studies using the above test schemes, extensive data have been obtained on the behavior of soils under a complex stress state.
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