玄武岩残积土的物理力学特性研究

Physical and Mechanical Properties Analysis of Basalt Residual Soil

通过对贵州地区玄武岩残积土进行室内物理力学试验,得出以下结论:玄武岩残积土属于粉质黏土,也为细粒土;胶粒含量较大,级配较差;残积土最优含水率远小于其塑限,且饱和度较低,击实曲线的不对称性表明残积土对水有较强的敏感性;黄褐色土压缩系数较红棕色大,两种残积土均属于中压缩性土;而回弹指数和变形量则呈现相反趋势,棕红色土比黄褐色残积土的回弹和变形量都大。

Based on the indoor physical and mechanical tests of basalt residual soil in Guizhou Province, the following conclusions are obtained. The basalt residual soil belongs to silty clay and is also fine-grained soil. The content of colloidal particles is high and the gradation is poor. The optimum water content of residual soil is far less than its plastic limit. The results show that the compressibility of the Yellow Brown soil is higher than that of the red brown soil, and the two kinds of residual soil belong to the medium compressibility soil, however, the rebound index and deformation amount show the opposite trend. The rebound and deformation amount of brown soil is larger than that of tan residual soil.