Abstract: Before the geotechnical structures are designed, it is often required to determine the mathematical physical model of the corresponding geotechnical medium to properly describe and predict the behavior of the rock and soil during construction and operation in deformation and stability. With the deepening of our understanding of physical phenomena, the geotechnical mechanics, which is evolved from the limit equilibrium theory on basis of rigid body mechanics to the elastic, elastoplastic or viscoelastic theory based on continuum mechanics, is now progressed to various non-continuous media mechanics methods. In this process, various mathematical models have been established for the purpose of describing the system response of the geotechnical medium system even when external environmental conditions are involved. In the process of numerical simulation analysis of actual geotechnical engineering, the value of geotechnical parameter is often an important factor affecting the accuracy, objectivity and practicability of geotechnical engineering simulation analysis results.

Key words: Regenerative Bayesian detection; Variable scale gradient theory; Bayesian objective function

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