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盐渍土是一种含盐量较高的盐碱土,当地表1m内含有容易溶解的盐类超过0.55%时即属盐渍土。土中最常遇到的易溶盐类有:氯化钠、氯化镁、氯化钙、硫酸钠、硫酸镁、碳酸钠、碳酸氢钠,有时也含有不易溶解的硫酸钙、碳酸钙等。由于土中含有易溶盐,土的物理力学性质和工程性质发生变化,引起许多路基病害,所以,盐渍土地区路基与一般地区路基在设计、施工中有很大差别。
Saline soil is a saline-alkali soil with high salt content. When the local surface 1m contains more than 0.55% of easily soluble salts, it is saline soil. The most commonly encountered soluble salt in the soil are: sodium chloride, magnesium chloride, calcium chloride, sodium sulfate, magnesium sulfate, sodium carbonate, sodium bicarbonate, sometimes containing insoluble calcium sulfate, calcium carbonate. As the soil contains soluble salt, the physical and mechanical properties of soil and engineering properties change, causing many roadbed diseases, so the saline soil subgrade and the general subgrade in the design and construction are very different.