冻土渗透系数非线性分析

1、nonlinear analyses for the permeability coefficient of frozen soilwhy ?how ?what? the the outline of presentationoutline of presentationthe outline of my thesis1. introduction 2. research methodology3. results and analysis 4. conclusionfrozen soil coring specimen frost soil component and volume intr

2、oductionintroductionresearch orientation:research orientation:why do i choose the theme for my study?the research on permeability coefficient of frozen soil has developed for decades, achievements existed are obtained mainly from qualitative analysis, the quantitative analysis is seldom seen.the pap

3、er researches the nonlinearity of frozen soil physical parameters in order to provide with theory and data support for frozen soil engineering.12methodology related to methodology related to this studythis studyfundamental assumptiongoverning differential equationsoftware-comsol model & equation

4、 microscopic three-dimensional model 0pkdarcy equation 122gbk the permeability coefficient equationtested specimen geotechnical parameters and measured grain composition of frozen soilresults & analysis comparison between the calculated value and the measured value of the permeability coefficien

5、tcorrelation of the average particle diameter and the equivalent permeability coefficientcorrelation of the porosity and the equivalent permeability coefficient results & analysis correlation of the unfrozen water content and the equivalent permeability coefficient correlation of the ice content

6、 and the equivalent permeability coefficient results & analysis conclusions2k decreases with ice content and the moisture content3comsol studies the correlation between k and influence factors ,reasonably and feasible41 k increases with particle diameter, porosity and unfrozen water contentk influence factor: porosity, particle diameter,