重塑膨胀土膨胀力室内试验研究

为了进一步研究膨胀土膨胀力的发展规律,采用平衡加荷法研究南京膨胀土竖向膨胀力随时间、初始含水率、干密度的变化规律。试验结果表明:膨胀土试样初始含水率越小、干密度越大,膨胀速率越快;同一干密度的膨胀土试样随着含水率的增加,膨胀力不断下降,膨胀土试样的膨胀力与含水率基本呈线性关系;同一含水率的膨胀土试样的膨胀力随干密度的增大而增大,膨胀土试样的膨胀力与干密度基本呈幂指函数关系。

Experimental study of the swelling force of remolded expansive soils

expansive soil;moisture content;dry density;swelling pressureIn order to further study of the law development of expansive soil expansion force, load balance method is used to study the Nanjing expansive soil vertical expansion force changing with time, initial moisture content, and dry density. The results show that the smaller the initial moisture content of expansive soil sample, the bigger the dry density is, the faster the expansion rate is;Expansion force decreases with the increase of initial water absorption, The expansion force and water content of expansive soil samples are linear. The expansive force increases with the increase of dry density, and there is exponential function between expansion force and dry density of expansive soil sample.