微观结构是影响击实粘性土工程性质的一个重要因素.在不同含水量下重塑的粘性土在击实过程中,其结构不断发生变化,并直接影响到土的工程性质.本文应用Videolab图象分析系统,对不同含水量下击实粘性土的微观结构进行了定量分析,提出了3种评价土结构定向性的定量指标,揭示了粘性土在击实过程中性质变化的内在机理 The microstructure is an important factor that affects the engineering properties of compacted clayey soil. The remolded clayey soil under different water content changes its structure continuously and directly affects the engineering properties of soil.In this paper, Image analysis system to quantitatively analyze the microstructure of clayey soils with different water contents and put forward three quantitative indexes to evaluate the structure orientation of clayey soils and reveal the intrinsic mechanism of the change of cohesive soil properties during compaction