Study on Micro-Structure Rebuild of Clay in Process of Consolidation

Abstract

Vacuum freeze drying method is applied to prepare samples for SEM from one-dimensional consolidation clay which suffered different pressures from original remolded state. And then simple and synthetical micro-structure parameters of SEM photos obtained from some section are studied to uncover relation between mechanics properties and micro-structure. The results tell us that the first principal component approximately linear increases with consolidation pressure. It is distinct that the synthetical parameters are superior to the simple parameters in construction soil mechanics relation because the former can reflect the whole micro-structure qualities, but the latter can not.

Test Investigation on Mechanical of Unsaturated Loess

“…Most of the loess in this region is unsaturated because of the dry climate. Since the middle of 20th century, many researches focused on the loess with certain depth were conducted, and gained a lot of achievements on loess Genesis [1][2], the basic physical and mechanical properties, collapsibility, structure characteristics and dynamic characteristics [3][4][5][6]. Loess is a kind of typical of unsaturated soil, the compression characteristics, collapsibility and the anisotropy induce by deposition process during engineering construction raised new questions, based on this study, the effect of both compression and collapse due to water content and dry density was analyzed, got the relationship between water content and compression and collapsible, as well as the dry density and compression and collapsible.…”