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黄土特殊的结构性导致其室内饱和过程困难和复杂,而饱和度及饱和时间对实验结果的准确性产生重要的影响,以GDS非饱和三轴仪为实验平台,采用不同实验方案对原状马兰黄土的饱和方法进行研究。研究结果表明:抽气饱和法破坏了原状黄土的结构;反压饱和施加反压过大并且时间长易引起预固结;水头饱和结合反压饱和法可使孔压系数B值在很小的压力下(反压)快速达到较高饱和。为研究饱和黄土的物理力学性质奠定基础。
The special structure of loess leads to the difficulty and complexity of the indoor saturation process, while the saturation and saturation time have an important influence on the accuracy of the experimental results. Taking GDS unsaturated triaxial apparatus as the experimental platform, The saturation method is studied. The results show that the suction saturation method destroys the structure of undisturbed loess; the back pressure saturation is too large and the pressure is too long to cause preconsolidation; the saturation pressure head saturation and back pressure saturation method can make the pore pressure coefficient B to be very small Pressure (back pressure) to achieve higher saturation quickly. It lays the foundation for studying the physical and mechanical properties of saturated loess.