Relationship between safety factor and reliability index of retaining wall s stability;

The sensitivity of the reliability index to the variance of load and soil properties are analyzed.

It is difficult to define the value of comprehensive variability coefficient of resisting force and acting force in reliability index inspection.

In this paper,the author use the method of mapping transformation to calculate the index of reliability β for the safe coefficient K=2 at the probable ratio of variable load and permanent load in practice of construction,and giving the relation function of ρ,β.

Introducing the probability modeling of soil profile base on the stochastic field theory,structural theory is used to analyze index of reliability of the foundation stability by means of engineering projects.

Further research is also carried out on sensitivity of parameters of shear strength c,φ and relationship between index of reliability and safety factor.

This method which both considered influence of uncertainty factors among structure parameters and satisfied prescribed main cable reliability level was used to get inverse main cable safety factors through target reliability indexes.

In the process of constructing the design formula,the target reliability index and important coefficients are determined according to the current specification and the two common load combinations have been taken into consideration.

This paper calculates the fatigue reliability index curve through analysis of crane stress-history course,judges the security of the crane and works out the next monitoring time referred the minimum target reliability index curve which shows crane needed monitoring.