固化硫酸盐渍土水盐迁移的试验研究

doi:10.13722/j.cnki.jrme.2017.0743

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Abstract

The rising of the capillary water in the saline soil foundation will inevitably lead to the upward migration and aggregation of salinity in the soil. The characteristics of the water and salt migration in saline soil were simulated by the test of the capillary water rising under the natural conditions. The changes of water content，Cl^－and at different times were measured after the gradient migration，and the characteristics of the capillary water and salt migration between the compacted saline soil and sulphate saline soil solidified by lime fly ash water glass were compared under the distilled water and compound salt solution. The results show that the rates of the capillary migration and Cl^－and migration in the solidified saline saline soil are less than those in the compacted saline soil，which indicates that the solidified soil has the effect on slowing down the rising of the capillary water and hindering the salt migration. After the stabilization of capillary water migration，the water content of the compacted soil decreases linearly and the water content in the solidified soil decreases linearly first and then stay the same along the height，indicating that the solidified soil has a stable water-holding ability. During the migration process，the migration rules of the water content，Cl^－and are consistent and the migration rate of Cl^－ is greater than that of . The experiments show that the solidified sulphate saline soil not only has an improvement of strength，but also can block the upward migration of salinity especially the upward migration of sulphate ion.

Key words： soil mechanics water glass sulphate saline soil capillary transport mechanism water and salt migration salt expansion

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	Articles by authors
	Lü Qingfeng1
	CHANG Chengrui1
	MA Bo1
	WANG Shengxin2
	JIANG Lusha1
	ZHAO Benhai1

Cite this article:

Lü Qingfeng1,CHANG Chengrui1,MA Bo1, et al. Experimental study on water and salt migration of solidified sulphate saline soil[J]. , 2018, 37(S2): 4290-4296.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2017.0743 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/IS2/4290

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