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Reliability Analysis of the Earth Slope in Terms of the Parameter Spacial Variance and Correlation

Author: YaoRuoJun
Tutor: LaiGuoWei
School: Wuhan University
Course: Hydraulic Structure Engineering
Keywords: Reliability Reliability index With the airport Spatial variability Cross-correlation coefficient Autocorrelation distance Critical slip surface
CLC: TU43
Type: Master's thesis
Year: 2005
Downloads: 251
Quote: 4
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Abstract

In civil engineering, slope stability analysis is a very important issue, and it involves many engineering BRIDGES engineering, hydraulic engineering, construction engineering, slope stability problem has been one of the geotechnical important research. In engineering, the traditional method of evaluation of the safety factor method. It does not consider the variability of the soil, the soil as have some sort of \calculation, and unknown, uncertain factors to the property of a single safety factor, they get the result is clear, therefore easier for people to accept. This traditional approach, however, ignores the geotechnical properties of parameter uncertainty, and actual is not consistent. In recent years, people come to realize that the uncertainty in the geotechnical problems, the reliability analysis of the introduction of the slope engineering is an inevitable trend of development. Different from the traditional safety factor, reliability analysis method in slope stability analysis takes into account the correlation between discrete geotechnical parameters and parameter quantitatively using probabilistic methods consider various not actually exist determining factors, and thus more objective, quantitative reflect the the slope actual security. Broad understanding of the development and research of slope stability at home and abroad on the basis of the basic theory and method of application reliability design, consideration of soil parameters as random variables and random fields two probability models, the preparation of the corresponding calculation program and project examples for Slope stability and reliability of a series of studies, some of the issues discussed primarily draw some conclusions of the theoretical value and practical significance. Paper covers the following aspects: (1) an overview of home and abroad about the history of the development of the slope stability and Research; 2 describes the main methods of reliability analysis, and the introduction of random field theory, consider Soil parameters space 3 application reliability analysis of JC, derivation of soil parameter probability for the random variable model parameters are mutually independent and cross-correlation the soil slopes reliability calculation under and variation under the conditions of the soil slope stability reliability analysis of the computational model; formulas; the 4 Application Reliability analysis of JC method, application of soil parameters with airports nature, derived spatial correlation of soil parameters and under conditions of variable soil slopes reliability formula; 5 according to the formula of the derivation proceeds, the preparation of the corresponding reliability index calculation program for Slope reliability analysis in some regularity issues were discussed, including the basic variables φ c coefficient of variation, mean, cross-correlation and autocorrelation and soil strip number n reliable indicator impact as well as the determination of dangerous sliding surface.

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