The determination of requirements for metrological parameters of geotechnical monitoring systems based on the bifurcation approach

Abstract

The article is devoted to substantiating the possibility of applying the bifurcation approach to determine the requirements for the metrological characteristics of the measuring part of geotechnical monitoring systems. It is noted that during the operation of the constructions, the change of physicomechanical properties is in the “soil base-foundation-structure” system. It is caused by seasonal, climatic factors and the change in the industrial environment. Prospects of using the bifurcation approach to assessing the stability of constructions under the influence of exogenous factors are noted. The nonlinear model of the deformation of the construction is described using an example of the rod with one degree of freedom, and the bifurcation diagram of its stability is constructed. It is noted that at the development stage of the construction the application of the bifurcation approach allows one to carry out the modelling and to determine bifurcation points, requirements for the sensitivity and accuracy of measuring instruments. It is proved that the probability of occurrence of errors of the 1st and 2nd kind is much lower on the basis of the proposed approach to assessing stability. The possibility of estimating the permissible error of measuring instruments is proved based on data from bifurcation diagrams.