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输运性质受固结过程影响的污染物输运模型 被引量:4

Contaminant migration model with consolidation dependent transport coefficients
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摘要 由于污染物的堆积和上部覆盖层自重的作用,污染物填埋场中的防渗层会发生固结,并由此产生压缩变形。固结过程可诱发污染物的对流输运,同时也会引起土层体积和结构的变化从而改变其固有的输运性质。考虑了固结过程对土层中污染物的输运过程和输运系数这两种情况的影响,建立了土层非线性固结过程与污染物对流–扩散输运过程耦合的模型。采用Crank-Nicolson有限差分法求解了此非线性模型在单面排水条件下的一维输运问题。编制了相应的matlab程序,利用这一程序进行了计算,并对计算结果进行了分析和比较。 Due to the contaminant accumulation and the weight of capping,consolidation will happen in the impervious barrier of the landfill liner.In addition to the induced advection of contaminant,the consolidation effect can change the structure and give rise to volume change of barrier.For this reason,transport coefficients,such as hydraulic conductivity and diffusion coefficient,will be changed with the consolidation process.The influence of barrier consolidation on transport coefficients is considered,and a contaminant transport model is established.The Crank-Nicolson finite difference method is used to discretize the one-dimensional mathematical model which describes the process of contaminant transport through deforming barrier.The computer program is developed to compute the distribution of contaminant concentration in the barrier,and analysis is made based on the computed results.
作者 黄璐 赵成刚 张雪东 刘艳 HUANG Lu,ZHAO Cheng-gang,ZHANG Xue-dong,LIU Yan(Department of Geotechnical Engineering,Beijing Jiaotong University,Beijing 100044,China)
出处 《岩土工程学报》 EI CAS CSCD 北大核心 2010年第3期420-427,共8页 Chinese Journal of Geotechnical Engineering
基金 国家自然科学基金项目(50778013)
关键词 孔隙率 污染物输运 固结 非线性 有限差分法 porosity contaminant transport consolidation nonlinearity finite difference method
作者简介 黄璐(1982-),女,四川宜宾人,主要从事多孔介质中污染物运移问题的研究。E—mml:huanglu600@163.com。
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