黄泛区粉土路基次生盐渍化临界高度研究

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摘要 To study the critical height of secondary salinization of silty soil subgrade, this paper examines the salt migration law in the secondary salinization of the non-saline soil subgrade in the Yellow River impact plain area via laboratory and numerical analyses using COMSOL Multiphysics. The results show that (1) if the top of subgrade has not yet formed poly salt, then the internal roadbed will also not form poly salt. and it shows the trend of gradually decreasing from the bottom to the salt distribution in the subgrade; (2) the relationship among the weak internal saline soil formation of critical height, the groundwater mineralization degree, and the underground water level at the top of the subgrade can be used to establish an approximate correlation and regression formula for the Yellow River impact plain area for estimating the weak internal saline soil formation of critical height; and (3) the influence of the groundwater mineralization degree on the secondary salinization of silty soil subgrade in the Yellow River impact plain area is significantly higher than those of the buried depth of groundwater and the filling height of subgrade.

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	姚占勇
	于君彦
	刘忠民
	张硕

关键词 ： road engineering, secondary salinization, numerical simulation, critical salinity accumulation height, regression analysis

Abstract：To study the critical height of secondary salinization of silty soil subgrade, this paper examines the salt migration law in the secondary salinization of the non-saline soil subgrade in the Yellow River impact plain area via laboratory and numerical analyses using COMSOL Multiphysics. The results show that (1) if the top of subgrade has not yet formed poly salt, then the internal roadbed will also not form poly salt. and it shows the trend of gradually decreasing from the bottom to the salt distribution in the subgrade; (2) the relationship among the weak internal saline soil formation of critical height, the groundwater mineralization degree, and the underground water level at the top of the subgrade can be used to establish an approximate correlation and regression formula for the Yellow River impact plain area for estimating the weak internal saline soil formation of critical height; and (3) the influence of the groundwater mineralization degree on the secondary salinization of silty soil subgrade in the Yellow River impact plain area is significantly higher than those of the buried depth of groundwater and the filling height of subgrade.

Key words： road engineering secondary salinization numerical simulation critical salinity accumulation height regression analysis

收稿日期: 2016-02-24

通讯作者: YAO Zhan-yong E-mail: Zhanyong-y@sdu.edu.cn

引用本文:

姚占勇, 于君彦, 刘忠民, 张硕. 黄泛区粉土路基次生盐渍化临界高度研究[J]. Journal of Highway and Transportation Research and Development, 2017, 11(4): 43-49.
YAO Zhan-yong, YU Jun-yan, LIU Zhong-min, ZHANG Shuo. Study on the Critical Height of Secondary Salinization of Silty Soil Subgrade in the Yellow River Impact Plain Area. Journal of Highway and Transportation Research and Development, 2017, 11(4): 43-49.

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