The Study of Duncan-Chang Model of Handan Silty Clay and the Stress-Strain Normalized Relationship
|School||Hebei University of Engineering|
|Keywords||Duncan-Chang model silty clay stress-strain relationship the triaxial test the normalized characteristic|
Stress-strain relationship of Soil materials is complicated and changeable, the same kinds of rock soil material might have different intensity characteristics in different area. Thus, in recent years, the study of soil strength and other characteristicsismainly on a certain type of soil. On the basis of the research achievements in the past, combined with the silty clay in Handan area, in this paper author has analyzed the stress-strain and deformation characteristics of the silty clay in Handan area. It determines the model parameter of Duncan-Chang model and modifies it. The chief results as following:(1)The paper introduces the development history of the construction model of soil, and points out its development direction. Because of the recent silty clay Handan study literature is relatively small, on the Handan silty clay constitutive theory, there is no detailed study. So the research results can provide the basis for the analysis and computation in the geotechnical engineering problem in Handan area and in the area similar to the soil layer.(2) A series of triaxial tests considering some different stress pathes for silty clay in Handan area have been performed. Based on these tests, it analyzes the relation of stress-strain and the deformation characteristics. The test results show stress-strain deformation behaviors as hardening and dilation in high consolidation pressure; it shows as soften in low consolidation pressure. And it analyzes several problems in triaxial tests.(3) On the basis of existing elasticity non-linear model study, it studies the construction model of silty clay in Handan area by Duncan-Chang model. Several normalization factor of the soil stress-strain relationship are used in normalizing study, and Handan silty clay normalized equation is got.(4) With the resulting normalized equation to predict simulation Handan silty clay in different drainage conditions under different confining pressure.