GCTS空心圆柱扭剪仪实心试样的饱和试验分析

Experimental Analysis on the Saturation Method of the Solid Sample by GCTS Hollow Cylinder Apparatus

GCTS空心圆柱扭剪仪是模拟土体在主应力轴旋转下的理想试验仪器,不但可以进行空心试样的扭剪试验,也可以完成实心试样的动、静三轴试验,而空心试样的反压饱和方法不适用于实心试样.本文基于GCTS仪进行了多组实心试样的饱和试验,提出了抽真空饱和与反压饱和相结合的饱和方法,结果表明该方法不但提高了试验效率,亦使后续试验结果更加精确.

GCTS hollow cylinder apparatus is the ideal apparatus to simulate the soil under the principal stress axis rotation. It can not only conduct the hollow torsional shear test but also conduct the dynamic triaxial test and static triaxial test of the solid sample. However, the back pressure saturation method is not applicable to the solid sample. Based on the multi-group saturation tests of the solid sample by GCTS hollow cylinder apparatus, this paper proposes a new saturation method which combines the vacuum saturation method with the back pressure saturation method. The result shows that this method improves the test efficiency and makes the result of the subsequent test more accurate.