Microstructural study on collapsible loess reinforced with dynamic compaction

The collapsibility of loess, which can be effectively eliminated by the dynamic compaction, does great harm to the safety of constructions. The effect of the dynamic compaction is evaluated through the contrast and analysis of the physical and mechanical properties of the collapsible loess before and after dynamic compacting. The compacting effect can be divided into three phases along the depth, and the most effective improved depth is from 3 to 8 m. The content of pores larger than 20 μm decreases and the content of pores smaller than 5 μm increases after the dynamic compaction. The density of loess is improved.