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非饱和土水力学参数包括土-水特征曲线和渗透函数是非饱和土研究的重要内容。鉴于传统的测试方法耗时较长,提出了能够快速测定非饱和土水力学参数的一步流动方法和动态多步流动方法,并利用联合测试系统分别开展流动试验。通过对比分析,这两种方法得到的试样平衡态土-水特征曲线均与实测值接近,并且有效地避免了由于测试时间较长高压气体通过水流在陶土板背面析出的问题。一步流动方法比动态多步流动方法需要的时间短,但反算得到的土-水特征曲线与实测值的接近程度不如动态多步流动方法,因此,动态多步流动方法要优于一步流动方法。
Unsaturated soil hydraulic parameters including soil-water characteristic curve and infiltration function are important contents of unsaturated soil research. In view of the long time-consuming of the traditional test methods, a one-step flow method and a dynamic multi-step flow method are proposed to quickly determine the hydraulic parameters of unsaturated soil. The flow test is carried out by the joint test system. Through comparative analysis, the soil-water characteristic curve of the equilibrium equilibrium state obtained by these two methods are close to the measured values, and the problem that the high pressure gas is precipitated on the back of the clay plate due to the long test time is effectively avoided. The one-step flow method requires less time than the dynamic multi-step flow method, but the inversely calculated soil-water characteristic curve is not as close as the measured value to the dynamic multi-step flow method. Therefore, the dynamic multi-step flow method is superior to the one-step flow method .