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以陕西杨凌黄土为研究对象,基于静三轴试验,研究了不同初始含水率、不同低温温度及不同冻融循环次数条件下黄土强度参数的变化情况。不同低温温度对冻融作用改变黄土强度参数从机理上做出解释,为进一步研究冻融循环作用对强度的影响效应提供理论支持;冻融循环试验结果表明,黄土强度参数随冻融循环产生劣化,黏聚力在经过一定次数的冻融循环之后降到最低值,随后趋于稳定,内摩擦角总趋势上略有增大,规律性不明显。
Taking the loess in Yangling, Shaanxi as an example, the change of strength parameters of loess under different initial moisture content, different cryogenic temperatures and different freeze-thaw cycles was studied based on the static triaxial test. Different cold temperatures affect the freezing and thawing process of loess strength parameters to explain the mechanism, which provides theoretical support for the further study of the effects of freeze-thaw cycles on the strength. The freeze-thaw cycle test results show that the loess strength parameters are deteriorated with the freeze-thaw cycles After a certain number of freeze-thaw cycles, the cohesion decreased to the lowest value and then stabilized. The general trend of internal friction angle increased slightly, and the regularity was not obvious.