兰州湿陷性黄土地区水泥土室内强度试验

Laboratory strength test of cement soil in collapsible loess area of Lanzhou

针对目前湿陷性黄土地区水泥土室内强度试验尚无统一操作规程,考虑水泥掺入比、综合含水率、击实功等水泥土强度因子,进行水泥土室内强度试验。在室内强度试验基础上,通过数据拟合得出掺入比α、综合含水率ω、击实功p、龄期T与圆柱体、立方体试件抗压强度的拟合关系。通过对比圆柱体、立方体试件的抗压强度,以期在水泥土试件尺寸选择上形成统一操作规程,推进兰州湿陷性黄土地区水泥土室内强度试验标准化。

In view of the problem that there is no unified operation procedure for soil-cement laboratory strength test in collapsible loess area at present, the soil cement laboratory strength test is carried out considering the cement mixing ratio,comprehensive moisture content, compaction work and other factors which mainly affect the strength of soil-cement. On the basis of laboratory strength test and through data fitting, the formula of fitting relation between incorporation ratio α,comprehensive moisture content ω, compaction work p, age T and compressive strength of cylinder and cube specimens is obtained. By comparing the compressive strength of cylinder and cube specimens, it is hoped to form a unified operation procedure for the size selection of soil-cement specimens, and promote the standardization of laboratory strength test of soil-cement in Lanzhou collapsible loess area.