初始干密度、含水率对无荷膨胀率影响试验

Experimental Study of Impact of Initial Dry Density and Water Content on Free Swell Ratio of Expansive Soil

为了研究娄益高速路基膨胀土的初始干密度、含水率与无荷膨胀率之间的关系,进行了膨胀土的室内无荷膨胀率试验。结果表明:在初始含水率一定时,娄益高速路基膨胀土的无荷膨胀率会随干密度的增大而增大;在干密度一定时,无荷膨胀率随含水率的增大而减小。根据结果建立了娄益高速路基膨胀土的无荷膨胀模型和时间函数模型,并给出了针对娄益高速路基膨胀土的模型参数。

In order to study the relationship between the initial dry density, water content and free swell ratio, the indoor test on free swell ratio of expansive soil in the subgrade of Louyi expressway was carried out. The results show that when the initial water content is constant, the free swell ratio of expansive soil will increase with the increase of dry density; when the dry density is constant, the free swell ratio diminishes with the increase of water content. The free swell model and time function model were established for the expansive soil in the subgrade of Louyi expressway based on the results, and the model parameters were given.