DOI: 10.3724/SP.J.1235.2012.00352

Journal of Rock Mechanics and Geotechnical Engineering 2012/2012:4 PP.352-359

Dynamic characteristics of lime-treated expansive soil under cyclic loading

To better understand the dynamic properties of expansive clay treated with lime, a series of laboratory tests were conducted using a dynamic triaxial test system. The influential factors, including moisture content, confining pressure, vibration frequency, consolidation ratio, and cycle number on the dynamic characteristics were discussed. Experimental results indicate that specimens at low moisture contents tend to damage along the 30° shear plane and they present brittle failure, while saturated specimens show swelling phenomenon and plastic failure. A reduction in cohesion has been observed for unsaturated samples at large number of cycles, while it is opposite for the internal friction angle. For the saturated specimens, both the cohesion and internal friction angle decrease with increasing number of cycles.

Key words:expansive soil,lime-treated soil,dynamic characteristics,low lime proportion

ReleaseDate:2014-07-21 16:38:20

Funds:National Natural Science Foundation of China (40772185) and the Knowledge Innovation Program of Chinese Academy of Sciences (kzcx2-yw-150)