106国道黄石段膨胀土结构特性研究

自由膨胀率是膨胀土判别和分类的一项重要指标,研究自由膨胀率特征与膨胀土结构特性关系有着重要意义。该文依托106国道黄石段边坡治理,开展了对该段路膨胀土自由膨胀率及其结构特性的一系列试验研究,分析了黄石段膨胀土的主要物理化学性质及微观特征。研究表明:106国道黄石段沿线膨胀土自由膨胀率与反映膨胀本质的指标蒙脱石的含量,以及液限、塑性指数等间接性判别指标具有较好的相关性;通过进一步微观分析总结出膨胀土的物理化学性质与水理性质主要受膨胀土的物质组成控制,而膨胀土的胀缩性、强度特性以及变形性质,则在很大程度上取决于膨胀土的结构特征。

Research on Architectural Characteristics of Expansive Soils on the Region of Huangshi of State Road 106

Free swelling ratio is an important index for the identification and classification of expansive soils,and it's meaningful to research the relationship between the free swelling ratio and the architectural characteristic of expansive soils.Based on the management of the side slope of state road 106,this paper analyzed the principal physical and chemical character of expansive soils and its microstructure through a series of test.The result of the test shows a good correlation between plasticity index and liquid limit and also shows that the free swelling ratio is linked with the content of montmorillonite in the expansive soils.This paper generalized the physical and chemical character of expansive soils is controlled by the substance property of the expansive soils and the swell-shrink characteristics,strength property,deformed property are mainly determined by its architectural feature.