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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Q3饱和黄土进行了常规三轴压缩、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,探讨和分析了应力路径对饱和黄土孔隙压力的影响,试验结果表明:不同应力路径作用下,饱和黄土的孔隙压力随着轴向应变的增大而不断增大;当土体的轴向应变较小时,孔隙压力基本上不受初始固结围压的影响,而当轴向应变超过5%之后,饱和黄土所受的初始固结围压越大,主应力差越大,其孔隙压力也会越大。
Using the SLB-1 stress-strain controlled three-axis shear permeability tester, the conventional triaxial compression of Q3 saturated loess in Shaanxi Province was carried out. The triaxial compression under decompression and the isostatic consolidation of equal p stress paths were not drained Axis test, the influence of stress path on pore pressure of saturated loess is discussed and analyzed. The results show that the pore pressure of saturated loess increases with the increase of axial strain under different stress paths. When the axis of soil When the strain is small, the pore pressure is basically unaffected by the initial consolidation confining pressure. When the axial strain exceeds 5%, the initial consolidation confining pressure of saturated loess increases, and the larger the principal stress difference, the larger the pore pressure The pressure will be greater.