The invention discloses an unsaturated soil permeability coefficient calculation method based on a soil-water characteristic curve, which mainly comprises the following steps of: (1) acquiring soil-water characteristic curve data points of unsaturated soil, and fitting by adopting a Fredundnx model to obtain a complete soil-water characteristic curve; (2) determining the area proportion of any pore ri in the section pores; (3) when the soil suction force of the unsaturated soil is determined to be psi k, the effective seepage area is determined by the pores ri; and (4) calculating the permeability coefficient when the soil suction force of the unsaturated soil is psi k. The invention belongs to the technical field of environmental engineering, and particularly relates to an unsaturated soil permeability coefficient calculation method based on a soil-water characteristic curve, which can quickly and accurately estimate permeability coefficients of unsaturated soil under different suction conditions and provide reference for design and construction of engineering. Compared with a traditional test measurement method, the calculation method has the advantages of being high in efficiency, low in cost and accurate in calculation result.

    本发明公开了一种基于土水特征曲线的非饱和土渗透系数计算方法,主要包括:(1)采集非饱和土的土‑水特征曲线数据点,采用FredlundΞ模型拟合得到完整的土‑水特征曲线;(2)确定任一孔隙ri在截面孔隙中所占的面积比例;(3)确定非饱和土的土吸力为ψk时,由孔隙ri决定的有效渗流面积;(4)计算非饱和土的土吸力为ψk时的渗透系数。本发明属于环境工程技术领域,具体是一种基于土水特征曲线的非饱和土渗透系数计算方法,能够快速准确地估测非饱和土不同吸力条件下的渗透系数,为工程的设计施工提供参考。相较于传统试验测量的方法,该计算方法具有效率高、成本低、计算结果准确的特点。


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    Title :

    Unsaturated soil permeability coefficient calculation method based on soil-water characteristic curve


    Additional title:

    一种基于土水特征曲线的非饱和土渗透系数计算方法


    Contributors:
    SUN CHANGHAO (author) / WEI XINYUN (author) / ZHAN WEI (author) / LI PENGYA (author) / MA JUNCHENG (author) / ZHANG HUIFANG (author) / GAO CHENGXIANG (author) / SUN ZEZHEN (author) / KIM BYUNG-MOO (author) / NI LIANGXIAN (author)

    Publication date :

    2023-11-10


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    G01N Untersuchen oder Analysieren von Stoffen durch Bestimmen ihrer chemischen oder physikalischen Eigenschaften , INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES / B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS