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基于滤纸法的测试原理,制作了一种新型基质吸力量测装置,用以研究干密度和温度对高液限红粘土土-水特征曲线的影响。结果表明:土中体积含水率越低,土的干密度越大,基质吸力随时间波动的幅度越大,达到平衡所需的时间越长。在测定该类土的基质吸力时,平衡时间以10d为宜。干密度和温度对高液限红粘土的土-水特征曲线有明显的影响,相同体积含水率条件下,干密度增大,温度升高,基质吸力减小。土的体积含水率与基质吸力的对数之间呈线性关系。
Based on the test principle of filter paper method, a new type of substrate suction measuring device was developed to study the effect of dry density and temperature on the soil-water characteristic curve of high-liquid limit red clay. The results show that the lower the soil moisture content, the greater the soil dry density, and the greater the magnitude of the substrate suction fluctuation over time, the longer it takes to reach equilibrium. In the determination of such soil matrix suction, the balance of time to 10d is appropriate. Dry density and temperature have obvious influence on soil-water characteristic curves of high-liquid-limit red clay. Under the same volumetric moisture content, dry density increases, temperature increases and matrix suction decreases. The linear relationship between the volumetric water content of soil and the logarithm of substrate suction.