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This paper uses the principle of Gini Coefficient which measures the equity of income distribution, based on the sample of the financial expenditure of typical public goods and the data of population size which belong to each province and municipality in 2007 to construct the mathematical model. It investigates the regional distribution structure of national public goods’ financial expenditure and calculates the corresponding “Gini coefficient” values through the quantitative research method, regression analysis. The calculated results show that it is reasonable on the distribution of the population that China’s finance invests in major public products and services vital to the people’s livelihood, and the investment does not exceed the bottom line of inequity. At last, the paper analyzes the reasons for the conclusions.

According to the strain nonlinear softening constitutive model of practical rock, pressure tunnel with liner is analyzed. The model is considered the influence of intermediate principal stress s2. Stress distribution laws of surrounding rock plastic zone of tunnel, the mechanism of load bearing and acting relation between surrounding rock and support are studied. Some important conceptions of working status of practical tunnel surrounding rock are obtained: such superior certain limit [Smax] of self-support geo-stress and inferior certain limit [Smin] of supportless tunnel surrounding rock. The relations between [Smax] and geo-stress, between [Smin] and geo-stress are given. Calculation shows that the assumed model agrees well with practical condition of rocks. Analysis shows that the ideal plastic model and the brittle model are special cases of the proposed solution.