粘土微结构特征与变形机理研究进展

Advances in Study on Microstructural Characteristic and Deformation Mechanism of Clay

将目前国内外有关粘土微观结构的研究工作分为粘土微观结构观测技术、粘土微观特征的形成机理、粘土变形时微观结构的变化特征及其机理等三个方面加以总结。在对已有研究成果进行整理的基础上,讨论了粘土变形微观结构特征,以及颗粒、孔隙和联结在整体上的一些变化趋势。文章还对未来相关研究方向进行了展望,包括需开发新观测技术对粘土变形过程中的动态微观结构进行实时观察,探索包括颗粒间联结在内的颗粒间相互作用以揭示粘土微观结构机理,以及研究微观结构变化与宏观土力学物理量间的关系,以期对工程实践提供更好的理论支持。

The research achievements in the microstructure of clay are introduced in this paper in three aspects ： the special techniques for observing the clay microstructure, the mechanism on clay formation and the characteristics of clay microstructure with deformation. Based on the analysis and discussion of these achievements, it can be concluded that these achievements obtained are mainly focused on the overall change trend of particles, pores and bonds among particles. Furthermore, some suggestions are proposed, that new techniques should be developed to effectively observe the microstructure change of clay, more studies on the interaction and bonds among clay particles are necessary for better understanding the microstructural mechanism of clay deformation, and discovering the relationship between microstructural characteristics of clay and macro - physical quantities of soil mechanics, which are helpful for engineering practice.