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《Journal of Guangxi University(Natural Science Edition)》 2011-04
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Laboratory research on characteristics of saline sulfate gravel soil during unidirectional freezing

DONG Xiao-ming,XIE Yong-li(Highway School,Chang'an University,Xi'an 710064,China)  
In order to study salinity expansion of saline sulfate gravel soils due to unidirectional temperature drop,a uniform indoor simulation method was used to analyze the saline expansion characteristics of 12 groups of samples with different saline contents,overlying load,initial dry density,and moisture content.The results show that the main saline expansion and deformation controlling factors for saline sulfate gravel soils include saline content,initial dry density and moisture content.However,overlying load has a strong restraining effect on saline expansion and deformation control properties.According to the laboratory test data,nonlinear regression analysis was applied to come up with a four-factor saline expansion formula for saline sulfate gravel soils.The conclusion reached by this study provide theoritical basis for the saline sulfate gravel soil expansion and reduction of harm of saline soil.
【Fund】: 交通部西部交通建设科研项目(2009310000003)
【CateGory Index】: U412.22
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