垃圾土大尺寸平板载荷试验与变形特性

垃圾土的组成成分极其复杂,且具有较强的时空变异性.获得垃圾土准确的承载力与变形特性对后续的大面积填筑土方进行堆山造景及安全的正常运营具有十分重要的意义.然而,对其承载力与变形特性的准确确定十分困难,大尺寸平板载荷试验是较为可靠的方法.通过载荷板尺寸为4 m×4 m的大型平板载荷试验,对武汉市某垃圾场内垃圾土层的工程性能...

Large-scale Plate Loading Test and Deformation Characteristics of Solid Waste

Composed of complex materials, solid waste is strongly variable in spatial and temporal scales. Obtaining the bearing capacity accurately and deformation characteristic of solid waste is of pivotal significance for the subsequent large-scale filling of earthwork for mountain landscaping and safe operation. However, accurately determining the bearing capacity and deformation characteristic of refuse soil is quite challenging. Large-size plate loading test becomes a good choice. We examined the engineering properties of solid waste soil layers in a garbage dump in Wuhan via large-scale plate load test with the loading plate size of 4 m×4 m. By monitoring and analyzing the changes in settlements below plate, soil subsidence in the peripheral of plate, layered settlements below plate, as well as deep horizontal displacement in the peripheral of plate, we obtained the ultimate bearing capacity and overall deformation characteristics of the solid waste. Test results revealed large deformation of the solid waste layer under the action of load, with an effect reaching 10 meters in depth, which is manifested as the punching and shear failure mode. The test results provide suggestions for the implementation of similar landfill reconstruction projects, and also reference for renovation projects of waste landfill in future.