应力路径对黄土结构性的影响

利用SLB–1型应力应变控制式三轴剪切渗透试验仪，对陕西杨凌黄土进行了应力控制的常规三轴压缩、减压三轴压缩和等p应力路径的各向等压固结不排水三轴试验，探讨和分析应力路径对黄土结构性的影响。试验结果表明：不同应力路径下，随着初始围压的增大，黄土的结构性参数并不是一味地不断增大，而是在300 kPa时有一个峰值，且当黄土的含水率较高时，其结构性参数相对较小。

Influence of stress path on structural characteristic of loess

Using the SLB - 1 triaxial and permeability apparatus with stress and strain control, triaxial tests with stress and strain control have been carried out on the intact loess of Shaanxi Yangling; the tests were carried out under consolidated undrained condition with different stress paths, which include conventional triaxial compression, reduced triaxial compression and with constant p. The influence of different stress paths on structural parameter of loess is studied. The experimental results indicate that, under different stress paths, with the increase of confining pressure, the structural parameters of the loess isn't always increasing. There is a peach when the confining pressure is 300 kPa; while the moisture content of loess is relatively higher, the structural parameter of loess is relatively smaller.