摘要
针对不同起始含水量的非饱和膨胀土,对其膨胀量和膨胀速率进行了详细试验研究。结果表明由于不同初始含水量的膨胀土具有不同的基质吸力值,导致土样在吸湿过程中发生不同的膨胀变形量。根据膨胀变形试验结果,建立了膨胀土的膨胀量、膨胀速率以及膨胀变形所需时间与起始含水量的相关公式。
Aiming at unsaturated expansive soil with different initial moisture content, the paper makes a detailed test study of its expansive capacity and expansive speed rate. The results show that soils would yield a different expansive deformation in the process of moisture absorption because the expansive soils with different initial moisture content possess a different matrices suction. Based on test data, the formula correlative of time required for soil＇s expansive capacity, expansive speed rate and expansive deformation with initial moisture content is established.
出处
《北方交通》
2007年第3期23-25,共3页
Northern Communications
关键词
非饱和膨胀土
土水特征曲线
膨胀量
初始含水量
Unsaturated expansive soil Characteristic curve for soil and moisture Expansive capacity In- itial moisture content
