粗粒盐渍土水盐迁移试验研究

为探究粗粒盐渍土水盐迁移特性,通过室内试验开展了不同细粒含量和盐分供给源的水盐迁移及时空分布特性研究.结果表明:粗粒土中细粒含量不同,盐溶液和盐渍土两种盐分供给源有不同的迁移规律.随细粒含量增加盐溶液供给源水盐迁移量逐渐减小,迁移速率最快的为10%细粒含量的土柱.随细粒含量增加盐渍土供给源短期水分迁移高度增加,整个土柱盐分迁移量增大,盐分迁移最显著的是30%细粒含量的土柱.因此粗粒盐渍土地区道路工程宜通过控制细粒土含量来抑制粗粒盐渍土水盐迁移.

Experimental study of water and salt migration in coarse saline soil

In order to investigate the characteristics of water and salt migration in coarse saline soil, the water and salt transport and spatial-temporal distribution characteristics with different fine-grained contents and salt supply sources are studied through laboratory experiments. The results show that with different fine-grained contents in coarse-grained soil, salt solution and saline soil supply sources have different transport laws. With the increase of fine-grained content, the water and salt transport of salt solution supply source decreases gradually, and quickest moving is the soil column with 10% fine-grained content. With the increase of fine-grained content, the short-term water transfer height of the saline soil supply source increases, the salt transfer of the whole soil column increases, and the most significant salt transfer is the soil column with 30% fine-grained content. For the road engineering in the saline soil area, the content of fine-grained soil should be controlled to restrain the water and salt migration in coarse saline soil.