碾压混凝土现场压水试验的环节对压水试验有影响,根据现场压水试验中的不同情况进行分析比较施工期碾压混凝土常在非饱和状态下压水,压水段附近的混凝土处于非饱和状态,压水时水流沿钻孔径向外渗,为饱和圈逐渐扩大的非恒定过程.推导了混凝土在非饱和状态下渗透系数的计算公式,真实地反映了碾压混凝土的渗透特性初步制定了碾压混凝土防渗效果的评定标准,根据试验结果对江垭大坝防渗效果进行了评价 According to the different situations in the field of pressurized water test, the analysis and comparison of the RCC in the non-saturated state is often under pressure, the concrete in the vicinity of the pressurized water section is in the non- In the saturated condition, the water flow infiltrates along the radial direction of the borehole when the water is pressurized, which is a non-constant process of gradual expansion of the saturation ring. The calculation formula of the permeability coefficient of the concrete in unsaturated state is deduced, and the initial permeability of RCC The evaluation standard of RCC anti-seepage effect was established, and the anti-seepage effect of Jiangya Dam was evaluated according to the test results