Rock-soil parameter random field inversion method

Abstract

The invention discloses a rock-soil parameter random field inversion method. The method comprises the following steps: analyzing conventional statistical characteristics, spatial correlation structures and spatial correlation functions of rock-soil parameters; according to the precision requirement of geotechnical engineering reliability analysis, determining the calculation range of the spatial correlation of the geotechnical parameters; constructing a spatial correlation matrix B according to the calculation range of the spatial correlation and the grid size of the engineering analysis numerical model; solving a coefficient vector c according to the spatial correlation matrix B; utilizing a pseudo-random program to assign an initial random value to each grid of the engineering analysis numerical model, and generating an initial random field; depending on basic inversion equations, performing cyclic operation on each grid in sequence; generating parametric random fields, wherein the basic inversion equation is shown in the specification; wherein x (p, q) = m (p, q) + sigma(p, q) cTu, in the formula, x (p, q) is a parameter random value of any grid (p, q), m (p, q) is a mean valueat the grid (p, q), sigma(p, q) is a standard deviation at the grid (p, q), c is a coefficient vector, and u is an initial random vector which is generated based on an initial random field and influences parameter value at (p,q).

Description

technical field [0001] The invention relates to the field of geotechnical engineering design, in particular to a random field inversion method of geotechnical parameters. Background technique [0002] In the field of geotechnical engineering design, reliability analysis is one of the most important aspects. Among the many uncertain factors affecting the reliability of geotechnical engineering, the uncertainty of geotechnical parameters is the most basic and the most important. For a long period of time, engineers have generally regarded geotechnical parameters as random variables for reliability analysis, but with the deepening of research, especially in the past 20-30 years, it has been shown that geotechnical parameters are regarded as random variables It can no longer meet the requirements of in-depth analysis of geotechnical engineering reliability. At present, scholars in the field of geotechnical engineering generally believe that geotechnical parameters should be re...

AI Technical Summary

Problems solved by technology

At present, the common random field inversion methods, such as Fourier transform method, moving average method, steering belt method, local average division method and matrix decomposition method, etc., some of these methods have low precision and some have low efficiency. Some have low precision and efficiency, therefore, the present invention proposes a random field inversion method of geotechnical parameters with both precision and efficiency

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