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基于对人工配制的城市固体废弃物(MSW)的土水特征试验,研究了不同有机含量、不同孔隙比下MSW的非饱和渗透系数,得到了MSW非饱和渗透系数随有机含量和孔隙比变化的定量关系式。研究结果表明在双对数坐标系下,MSW的气相和液相非饱和渗透系数和吸力几乎为线性关系;对于相同的吸力作用,孔隙比越大,其液相和气相非饱和渗透系数也越大;总体上液相非饱和渗透系数的变化范围为10-11～10-5 cm/s,气相非饱和渗透系数的变化范围为10-5～10-2 cm/s。与有机含量的变化相比,孔隙比的变化对MSW非饱和渗透特性的影响较为明显。公式验证表明,利用该方法预测已知成分和孔隙比的MSW的非饱和渗透系数是可行的。
Based on the tests of soil water characteristics of artificially formulated municipal solid waste (MSW), the unsaturated permeability coefficients of MSW with different organic contents and different void ratios were studied. The results show that the unsaturated permeability coefficient of MSW varies with organic content and void ratio Quantitative relationship. The results show that in double logarithmic coordinate system, the gas-liquid and liquid-phase unsaturated permeability coefficients of MSW are almost linear with the suction force. For the same suction effect, the larger the porosity ratio, the more the liquid-phase and gas-phase unsaturated permeability coefficients In general, the range of variation of unsaturated liquid-permeable permeability coefficient is 10-11 ~ 10-5 cm / s, and the variation of non-saturated permeability coefficient of gas phase is 10-5 ~ 10-2 cm / s. Compared with the change of organic content, the influence of void ratio on the unsaturated permeation characteristics of MSW is obvious. Formula verification shows that it is feasible to use this method to predict the unsaturated permeability coefficient of MSW with known composition and void ratio.