Abstract:

This paper summarizes the development of the loess collapsibility mechanism on the basis of memorizing the early results, discusses the research status of loess collapsibility mechanism from the aspect of microscopic structure, mathematical analysis methods, soil mechanics and constitutive model, and provides some problems in current growth of the loess collapsibility mechanism research combining the project instance and outlines the development trend of the research. A viewpoint is constructed that the research of loess collapsibility mechanism should be improved by constructing the constitutive relation of loess collapsibility under various stress paths from the aspect of unsaturated soil mechanics using discrete element analysis and considering the soluble salt, combining the advanced instruments and analysis software on the basis of the study of losses microstructure. It has an significant theory and introduction meaning to understand the loess collapsibility mechanism correctly and make a deep research.

Key words: collapsible loess, collapsible mechanism, microstructure, soil mechanics