Experimental study on engineering mechanical properties of aged refuse

The engineering mechanical properties of aged refuse are the most basic data for the slope stability and the land resources reused of the landfill. Borehole samples of aged refuse with different depth are obtained to get the engineering properties from Jinkou landfill in Wuhan. The Engineering properties of aged refuse are researched by a series of laboratory tests, such as component, particle size, moisture content, organic content, hydraulic conductivity, the consolidated undrained (CU) and consolidated drained (CD) triaxial test. The test results show that the composition of the aged refuse stays stable after organism degradation. The Grain size distribution is not uniform, and the content of organic is 6.31%-13.76%,the moisture content is about 22.19%-55.67%,the saturated conductivity is among 2.91E-06cm/s-1.12E-05cm/s. The moisture content and organic content decrease with the depth increase. Based on the shear strength property of aged refuse, the constitutive relation of the tested aged refuse is basically simulated the Duncan-Chang nonlinear elastic model. The conclusions of this paper can be applied to the stability analysis and provide a more complete database for aged refuse. © 2015 ejge.