中文摘要：

为了明确影响典型粗粒硫酸盐渍土路基盐胀特征的敏感参数,提出相关的敏感参数量化分析模型及其影响因素和因素间交互作用的量化指标。采用5 mm筛法的易溶盐测定方法,基于典型粒径的粗粒硫酸盐渍土,以单因素试验结果为基础,采用二次回归正交设计法提出了多因素交互作用下的粗粒硫酸盐渍土的盐胀率预报模型,同时采用SPSS软件对各敏感性因素进行逐步回归分析,研究结果表明：敏感因素的量化指标依次是易溶盐（46%~37%）、荷载（43%~29%）、水（12%~6%）、易溶盐与荷载的交互作用（7.6%）、易溶盐与水的交互作用（2%）,其中,易溶盐对盐胀率为促进作用,水会因含盐量不同而对盐胀率的作用产生变化,荷载、易溶盐与荷载的交互、易溶盐与水的交互均对盐胀量具有一定的抑制作用;初始压实度对盐胀率具有一定的促进作用,但由于其特殊的级配特征,初始压实度在89%~97%范围内对盐胀率的影响效果并不显著。

英文摘要：

In order to determine the sensitive parameters of embankment deformation behavior for coarse-gained sulfate saline soil, the quantitative analysis model for the correlation sensitive parameters is proposed, and the relevant influence factors and the quantitative indexes of the interaction between the factors of coarse-grained sulfate saline soil are investigated. Based on the single-factor salt expansion test results, the salt expansion tests under the interaction of multiple factors are performed using the orthogonal design method. And the simplified prediction models for salt expansion rate of coarse-grained sulfate saline soil are established. The sensitive parameters for the deformation behavior of Coarse-grained sulfate saline soil are studied through stepwise regression analysis of SPSS. The results show that the quantitative indexes of the sensitive factors are salt （46%~ 37%）, load （43%~29%）, water （12%~6%）, interaction of salt and load （7.6%）, interaction of salt and water （2%） in turn. The soluble salt on salt expansion is promoted. Due to different salt contents, the water will have a change in the role of salt expansion rate. The load, interaction of salt and load, interaction of salt and water have a certain inhibitory effect on the salt expansion. The initial compaction degree has a certain effect on the salt expansion rate, but it has no significant effect on the salt expansion rate in the range of 97% - 89% due to its special characteristics.