冻融循环对盐渍土单轴强度影响的微观机理研究

Study on the micromechanism of influence of freeze-thaw cycle on the uniaxial compressive strength of saline soil

通过对天然风干素土中添加不同浓度的Na Cl盐溶液分别模拟不同含盐量的盐渍土,经冻融循环试验后,借助德国蔡司体式显微镜获取微观特征,并对其进行单轴抗压试验,从微观角度探讨盐渍土的微观结构性问题,分析其宏观力学特性变化规律,最终得出了一些有意义的结论。

By adding different concentration of Na Cl in natural air drying grain soil salt solution the saline soil of different salinity were simulated respectively,after freeze-thaw cycling test,with the help of the German Zeiss postures microscope microscopic characteristics,and the line by the uniaxial compression test,the saline soil were discussed from the micro angle of the micro structural problems,analysis of its macroscopic mechanical properties change rule. Finally,some meaningful conclusions have been drawn.