城市生活垃圾的天然和生物降解渗透特性及渗透与变形耦合机理研究

项目名称： 城市生活垃圾的天然和生物降解渗透特性及渗透与变形耦合机理研究

项目编号： No.51478436

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： 张振营

作者单位： 浙江理工大学

项目金额： 80万元

中文摘要： 将生活垃圾分为三大类：容易降解的高压缩性材料、很难分解的高压缩性加筋材料、不可压缩的固体材料，模拟国民经济发展的不同阶段，按不同的配比配制新鲜及降解垃圾。在垃圾填埋场采集不同埋龄的垃圾，采用室内大型渗透模型槽、三轴渗透仪、渗透柱、渗透与变形联合测定等大型渗透仪器，考虑不同组分、不同配比、不同初始孔隙比、不同应力、不同温度、考虑渗滤液回灌等因素，进行大量的室内渗透试验，并与垃圾填埋场实验区垃圾的抽水、注水等渗透试验结果及现场载荷试验、旁压试验等原位测试结果相比较，全面、系统地研究生活垃圾的天然及生物降解渗透特性，深入解释其渗透与变形耦合作用的机理，建立垃圾的应力-变形-渗透-时间理论模型，编制有限元程序进行数值模拟，提出生活垃圾渗透性的理论计算方法。本项目对于垃圾渗滤液的有效控制与治理、对于垃圾填埋场的稳定性研究都具有重要的理论和实际工程意义。

中文关键词： 城市生活垃圾；生物降解；渗透特性；变形；耦合

英文摘要： The natural and the biodegradable permeability and the mechanism of the coupled of the permeate and the deformation will be studided based on the method of laboratory test and the insitu test for the municipal solid waste(MSW). The MSW could be the fresh, biodegradable and the different aged waste in the landfill, and the waste materials will be divided into three parts, which are the materials that is readily biodegradable, difficulty biodegradable and the incompressible solid waste materials. The fresh and the biodegradable waste will be prepared according to the stage of the national economy. The laboratory tests for the large-scale permeate model tank test, tri-axial osmoscope and the permeate column test will be proceeded by considing the large quantity factors, which are components, mixture ratio, initial void ratio, stress, temperature, leachate-recycled and so on. The in situ tests for the pumping permeate test, water injection permeate test, loading test, lateral pressure test will be proceeded in the MSW landfill. The test results of the laboratory test and the in situ test will be compared and analasised, and the mechanism of the coupled of the permeate and the deformation will be profound explanated. The theoretical model of the stress-deformation-permeate-time will be presented, and the finite element program will be worked out for the numerical calculation. Finally, the permeability theoretical calculation and the design method will be put forward for the MSW. This research will have the important teoretical and engineering significance for the effective controling and treating for the leachate, and the stability analysis in the municipal solid waste landfill.

英文关键词： municipal solid waste;bio-degradation;permeability;deformation;couple