制样方法对重塑黄土单轴抗拉强度影响的初探

Effects of specimen-preparing methods on tensile strength of remolded loess

研究了重塑黄土的2种制样方法对其单轴抗拉强度的影响,第1种制样方法是用标准击样法制取重塑黄土三轴试样(试样1),第2种方法应用轻型击实仪击实得到大块样。然后,在切样器上水平方向取样得到重塑黄土三轴试样(试样2)。试样1分层面与拉力方向垂直,试样2分层面与拉力方向平行。单轴抗拉试验结果表明,层面会对其抗拉强度产生影响,试样2抗拉强度较高,试样1抗拉强度较低。

Effects of two specimen-preparing methods on tensile strength of remolded loess are studied.The first method adopts standard layered-bumping to make sample whose layer interfaces are vertical to tensile force(sample 1).The second method uses compaction apparatus to prepare big sample and the big sample is cut to prepare triaxial sample whose layer interface is parallel to tensile force(sample 2).Test results indicate that the sample 2 has higher tensile strength;and layer surfaces in sample 1 decrease its tensile strength.