多场耦合作用下垃圾填埋场多组分污染物击穿衬垫系统的机理与污染控制方法

项目名称： 多场耦合作用下垃圾填埋场多组分污染物击穿衬垫系统的机理与污染控制方法

项目编号： No.51478427

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 建筑环境与结构工程学科

项目作者： 谢海建

作者单位： 浙江大学

项目金额： 86万元

中文摘要： 我国垃圾填埋场衬垫系统服役环境复杂，受到温度场、多组分污染物和应力场场等的耦合作用，其长期服役性能并不明确。本课题拟通过单元体试验研究土颗粒与渗滤液液多组分污染物之间的物理、化学和生物等界面行为，揭示土体微观结构改良与环境土工特性的关联性，评价衬垫渗透、扩散、吸附和降解等特性；通过离心模型试验揭示在温度场和应力场等耦合作用下衬垫系统的击穿模式和长期服役性能控制因素；在上述试验的基础上，建立渗滤液多组分污染物在填埋场衬垫系统的多场耦合运移模型，提出基于击穿时间、渗漏量及底部浓度等指标的衬垫系统长期服役性能评价方法。本课题的研究对垃圾填埋场地下水土污染控制有重要的工程意义，并将促进人们对填埋场多场耦合作用下多组分污染物在衬垫系统中运移机理的深入认识。

中文关键词： 垃圾填埋场衬垫系统；多组分污染物运移；界面行为；多场耦合；离心模型试验

英文摘要： The service environment of municipal solid waste landfills in China is quite complicated. The long-term performance of liner system under the coupled effects of temperature, multicomponent contaminant and overburden stress are not fully investigated. The interface physical, chemical and biological interaction between soil particles and leachate multicomponent contaminant will be investigated. The relationship between the modification of soil micro-structure and the geoenvironmental characteristics of the soils will be developed.The permeability, diffusion, adsorption and degradation characteristics of the soils will then be evaluated on the basis of the reustls of interface behavior tests. Geotechnical centrifuge tests will be carried out to investigate the breakthrough modes of the landfill liners under the coupled effects of temperature and stress.The governing factors affecting the long-term performance of the landfill liner systems will also be revealed in the centrifuge tests. On the basis of the above mentioned laboratory tests,the coupled model for leachate multicomponent contaminant transport in landfill liner systems will be developed. The long-term performance assessment methods for liner systems will be proposed regarding the indexes of the breakthrough time, leakage amount and bottom concentration. This project will be of great importance to groundwater pollution control of landfills.The mechanism of coupled tranport of leachate multicomponent contaminant in the landfill liner systems will be deeply revealed by the investigation of the project.

英文关键词： landfill liner systems;multicomponent contaminant transport;interface behavior;coupled effects;centrifuge modeling test