风积沙直剪试验研究

Experiment Research on Direct Shear of Wind-blown Sand

为探讨不同密实状态下风积沙内摩擦角的变化情况,采用改造过的直剪仪器对不同级配、不同压实度的风积沙进行直剪试验。试验结果表明,风积沙内摩擦角与压实度线性相关,另外颗粒级配是风积沙内摩擦角的主要影响因素,而含水量对其的影响较小。

In order to research the internal friction angles of wind-blown sand with different compaction, experiments of wind-blown sand with different grading and compaction have been made through the direct shear apparatus which has been transformed. The results show that the statistical laws between internal friction angle and compaction are linear relations, water-content＇s influence is relatively little, while the size grading is the main influencing factor.