泥页岩重塑样三向膨胀力试验

Experimental Study on Three-way Expansive Force of Remolded Mud Shale

利用岩土三向膨胀力仪对准格尔膨胀泥页岩重塑样进行了不同初始含水率、不同干密度的三向膨胀力试验。结果表明:(1)经过单向压缩的重塑样存在各向异性,竖向膨胀力始终大于径向膨胀力,随干密度增大各向异性更加显著;(2)干密度越大膨胀力越大,二者呈指数变化;(3)初始含水率越大膨胀力越小,二者呈线性变化,干密度越大,膨胀力随初始含水率变化的速率就越大。

Three-way expansive force tests with different initial moisture content and different dry density were carried out for the remolded samples of Jungar expansive mud shale with the geotechnical triaxial expansive force meter. The results show that：（ 1） The unidirectional compression remolded samples have anisotropy,and the vertical expansion force is always larger than the radial expansion force,and the anisotropy is more significant with the increase of the dry density.（ 2） The larger the dry density is,the larger the expansion force is,and they are in an exponential relationship.（ 3） The expansion force decreases with the increase of the initial moisture content,and there is a linear relationship between these two elements.Meanwhile,with the increase of dry density,the change rate of the expansive force with initial moisture content also rises correspondingly.