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中文摘要：
兰州黄土是典型的硫酸盐盐渍土，土中易溶盐的存在严重影响土体物理力学性质．采用去离子水浸泡过滤的方法对兰州黄土做了洗盐处理，比较了洗盐前后土体物理力学性质的变化．由于洗盐后土体的颗粒粒组成分发生较大变化，颗粒细化，黏性土颗粒的增多，导致土体的液塑限有不同程度的升高；洗盐后黄土状盐渍土的结构性发生变化，钙质胶结程度降低，土体的抗剪强度参数和单轴抗压强度均有不同程度的增大．
英文摘要：
Lanzhou loess is the typical sulfate saline soil, and the soluble salt in the soil has a significant influence on the physical and mechanical properties of the soil. In order to study the salt effect on the physical and mechanical properties of the Lanzhou loess and compare the variations of the soil properties with and without salt, the desalting experiments on the Lanzhou loess were performed by dipping the soil into the deioned water to soak out the salt in the original soil and then to filtrate for remaining the soil particles. The Atterberg limits of the soil after desalting increase owing to the variation of soil particle composition and grain refining. The shear strength parameters and the u-niaxial compressive strength increase after desalting owing to the decrease in calcitic cementation and the variation of soil structure after desalting.
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