季冻区路基填料基质吸力及平衡湿度研究

土水特征曲线(SWCC)的测定是岩土工程中的渗流分析和土壤的平衡状态下湿度（含水率）预估的重要环节，也是岩土数值模拟分析的关键性输入。本研究考虑季冻区的气候状况，对0，1，3，5次冻融循环后的油页岩废渣粉煤灰改良土路基填料（MC）及粉质黏土（SC）进行了不同含水率下的基质吸力测量，对冻融前后两种填料的SWCC进行了系统分析和比较，并对两种填料在吉林地区平衡湿度范围提出预测，可为实际工程提供参考。

Study on suction and equilibrium humidity of subgrade filling Matrix in seasonal Frozen areas

The determination of soil-water characteristic curves (SWCC) is an essential part of seepage analysis as well as estimating soil humidity (water content) in the equilibrium state in geotechnical engineering. SWCC is also the key input for numerical simulation of geotechnical analysis. In this study, based on climatic conditions in the seasonal frozen zone, the oil shale fly ash modified roadbed filler (MC) and silty clay (SC) after 0, 1, 3, and 5 freeze-thaw cycles were subjected to matrix suction measurement at different moisture contents. Systematic analysis and comparison for SWCC of MC and SC before and after freezing and thawing were conducted. Moreover, predictions of the equilibrium humidity range of MC and SC in Jilin Province was proposed, which can provide reference for practical engineering.