摘要
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 soil-water characteristic curve of synthetic MSW,quantitative relations between unsaturated conductivity and void ratio/organic content of MSW are given.The relations between unsaturated conductivity and suction in two logarithms coordinates are shown to be linear.The larger the void ratio,the larger the unsaturated hydraulic conductivity and unsaturated gaseous conductivity.The unsaturated hydraulic conductivity is 10-11~10-5 cm/s,and the unsaturated gaseous conductivity is 10-5~10-2 cm/s.The void ratio has more serious influence on unsaturated conductivity compared to the organic content.The experimental results are proved reasonable by validation,and the unsaturated conductivity of certain MSW can be predicted by the proposed method.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2012年第5期855-862,共8页
Chinese Journal of Geotechnical Engineering
基金
国家自然科学基金项目(50879022)
江苏省自然科学基金项目(BK2008355)
江苏省高校研究生科技创新计划(CXZZ11-0427)
