新疆阿拉尔路基盐渍土的盐胀特性研究

Study on the Salt Expansion Characteristics of Xinjiang Alar Saline Soil Subgrade

为深入研究新疆阿拉尔路基盐渍土的盐胀特性,在室内进行了多次冻融循环模拟试验。通过不同盐分分布状态的盐胀试验,分析盐分不同空间分布的盐胀结晶规律;对初始压实密度相同、含水率相同的含盐和不含盐的两组土样的对比,分析盐渍土不同的含盐量、干密度、含水率、颗粒不均匀系数对盐胀性的影响。结果表明在以后路基施工过程中,可通过控制盐渍土路基中的含盐量、含水率、颗粒级配等来抑制路基盐胀破坏程度,从而减少路基因盐渍土盐胀带来的病害。

To delve into Xinjiang Alar sea salt expansion characteristics of saline soil subgrade,the indoor simulation experiment,repeated freeze-thaw cycles through different salinity distribution state salt expansion test,analysis of the salt expansion of the spatial distribution of different salt crystallization law; The same moisture content and initial compaction density salt and salt-free two groups of soil sample was compared,the influence of saline soil with different salt content,dry density,moisture content,particle non-uniform coefficient to salt expansion was analyzed,in the future by controlling the saline soil subgrade in salt content,moisture content,grain size distribution,etc to suppress the roadbed salt heaving damage,thereby reducing the damage caused by the salt expansion of saline soil.