Variations of Physical and Mechanical Properties of Saline Loess before and after Desalting
Variations of Physical and Mechanical Properties of Saline Loess before and after Desalting
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发表时间：
2011
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通讯作者：
Denghui Jin
中科院分区：
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作者：
Denghui Jin
兰州黄土是典型的硫酸盐盐渍土，土壤中的可溶性盐对土壤的物理力学性质有显著影响。为了研究盐对兰州黄土物理力学性质的影响，比较有盐和无盐条件下土壤性质的变化，对兰州黄土进行了脱盐试验，方法是将土壤浸在脱水水中，将原土中的盐分浸出，然后过滤，留下土壤颗粒。脱盐后土壤的阿特伯格极限由于土壤颗粒组成的变化和颗粒的细化而增大。脱盐后土体的抗剪强度和单轴抗压强度均因钙质胶结减少和土体结构变化而增大。
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 uniaxial compressive strength increase after desalting owing to the decrease in calcitic cementation and the variation of soil structure after desalting.