Laboratory testing of a densified municipal solid waste in Beijing

市政的稳固的废物(MSW ) 和它的处理在 geotechnical 和 geoenvironmental 工程正在获得重要重要性。然而，常规研究首先集中于在垃圾堆在它的自己的重量下面被压缩的新鲜 MSW 或 MSW。在这个工作，在地面处理以后学习使增加密度的 MSW 的性质的一系列测试被介绍。测试包含了 oedometer 测试，简单砍测试， triaxial 砍测试，和渗透测试，被进行调查压缩的可能性，砍力量，爬 MSW 的行为和渗透。当干燥密度增加，结果证明 MSW 的压缩的可能性模量增加。然而，一旦密度到达某个价值，模量上的密度的影响减少。象大多数土壤一样，使增加密度的 MSW 的压力紧张曲线能被一条双曲线在 triaxial 接近砍测试。含纤维的部件为 MSW 提供另外的结合，但是在磨擦角度上有相对更小的效果。渗透也被发现是仔细与 MSW 的干燥密度有关，即，有更高干燥的密度的 MSW 有更小的渗透。如果密度足够高，渗透系数可以是不到 10-7 cm/s。

Municipal solid waste （MSW） and its disposal are gaining significant importance in geotechnical and geoenvironmental engineering. However, conventional research is primarily focused on fresh MSW or MSW that is compacted under its own weight in the landfill. In this work, a series of tests to study the properties of a densified MSW after ground treatment were presented. The tests involved oedometer test, simple shear test, triaxial shear test, and permeability test, which were conducted to investigate the compressibility, shear strength, creep behavior and permeability of the MSW. The results show that the compressibility modulus of the MSW increases as the dry density increases. However, the influence of density on modulus decreases once the density reaches a certain value. Like most soils, the stress-strain curve of the densified MSW can be approximated by a hyperbola in the triaxial shear test. Fibrous components provide additional cohesion for MSW, but have a relatively smaller effect on friction angle. Permeability is also found to be closely related to the dry density of the MSW, i.e., MSW with a higher dry density has a smaller permeability. The permeability coefficient may be less than 10 7 cm/s if the density is high enough.