Because the current methods for determining specific yield of undisturbed soil are not precise, aimed at designing a new determinator and proposing a new test idea and its calculation method, the research was conducted. First, the structure of a new determinator and its operational process for specific yield were proposed. Second, based on the analysis of infiltration and water release process of soil and the definition of specific yield, the formula presented by physical property parameters of medium and penetration liquid was obtained for computation of specific yield. The analysis results and examples indicated that the determination process of the determinator designed is simple. The seepage process was approximately the same as the practical flow pattern, and the formula has high accuracy.%针对目前原状土测定给水度方法存在较大误差,设计了一种原状土给水度测定仪,并提出新的测试思路及其计算方法.首先设计了给水度测定仪的结构及其操作过程,然后在分析土体入渗过程和释水过程的基础上,根据给水度定义,对给水度的计算公式进行推导,得到了用介质和渗透液的物理性质指标表述的给水度计算公式.分析结果及实例计算表明,原状土给水度测定仪测定过程简单,渗流过程与实际流态相近,公式计算结果准确.
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