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本文主要介绍在中国辐射防护研究院 (CIRP)野外试验场从地表到潜水位 2 8m深范围内 4 6个土芯样的水特征曲线的测量方法及测量结果。结果表明 ,场址包气带导水特征随深度变化明显 ,可将其分为 5个层带 ,并由测量结果推导出各层带土壤的非饱和渗透系数、比水容量及当量孔径分布等非饱和水动力学参数。测量得到的土壤水特征曲线与现场包气带剖面含水量和基质势动态观测结果符合较好。利用本文研究得出的参数 ,计算得到的试验场址包气带孔隙水流速与现场 3 H示踪试验得到的结果也符合较好。
This paper mainly introduces the measuring method and measurement results of 46 core soil-like water characteristic curves from the surface to the diving site of 28 m deep in the pilot field of the China Institute of Radiation Protection (CIRP). The results show that the characteristics of aeolian water conveyance in the zonal aeolian belt vary greatly with depth, which can be divided into five layers, and the unsaturated hydraulic conductivity, relative water capacity and equivalent pore size distribution Unsaturated hydrodynamic parameters. The measured soil water characteristic curve is in good agreement with the dynamic observation results of the water content and matrix potential of the in-situ gas-bearing zone. Using the parameters obtained in this study, the calculated pore water flow velocity in the gas-in-pack zone at the test site is in good agreement with the 3 H trace test in the field.