Method for determining soil mechanical parameters from in-situ test data on the base of real nonlinear soil deformation

1. Home
2. Publications
3. Online Library
4. Method for determining soil mechanical parameters from in-situ test data on the base of real nonlinear soil deformation

Abstract. Deformation of non-rocky soils is physically non-linear, which means that the values of soil stiffness characteristics depend on the stress-strain state. This fundamentally distinguishes the type of deformation of soils from the type of deformation of structural materials with rigidity characteristics. The physical non-linearity of soils requires the determination of their mechanical parameters from in-situ tests, taking into account the stresses existing in soils. The paper describes in-situ method for such a determination for a phenomenological physically nonlinear soil model. The method also makes it possible to determine the characteristics of an elastic-plastic model with the flow condition according to Coulomb. The method is based on special procedures for solving inverse nonlinear problems using numerical simulation of soil deformation under static loading taking into account geometric nonlinear factor. Principal idea of the method is in minimizing actual derivations of soil deformations from in-situ tests with rigid circle plates and (or) radial pressuremeter from numerically simulated deformations with using verified physically nonlinear soil model. Presented algorithm of the method and some examples of practical applications of the method for design of real objects. Method can be used in the case of complex soil conditions when sampling is difficult or even impossible, namely at areas of sea shelves or for specific soils. Presented algorithm of the method and examples of practical application of the method for the design of some real objects.

18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)

A - New developments on structural design