Study On The Strength Characteristics And Slope Stability Of "Garbage Soil"

With the improvement of the level of urbanization in our country,which is associated with the rapid increase of urban solid waste.Sanitary landfill method is a major means of urban solid waste in our country at present,as urban solid waste treatment method of ultimate will exist for a long time.In order to increase the capacity of the landfill,landfill fill in higher and higher,the height of slope more fill more steep,owing to lack of understanding of strength characteristics of urban solid wastes,ensued the landfill instability around the world.In order to build correct evaluation on the landfill site and the design of modern sanitary landfill in a reasonable manner,this paper systematically studies the strength properties of garbage soil,and stability analysis of landfill.With reference to changan the main component of solid waste landfill site in chengdu,artificial compound sample,the use of conventional triaxial apparatus for drainage and consolidation is not consolidated undrained shear experiment,study different degradation time(30 days,90 days,180 days)garbage soil strength and deformation characteristics.According to the experimental results,the strength mechanism of the refuse soil was revealed,and the stress-strain relationship of the refuse soil was found to have strong strain hardening characteristics.To analyze along the translation at the bottom of the destruction of the stability of landfill site,the wedge method is adopted,the balance equation,solving landfill stability safety coefficient,and analyzes the influence of different parameters on the stability of landfill.This paper discussed the influence of different time of city garbage soil strength degradation law,and made a set of dam and dam slope stability analysis is not set up,can for sanitary landfill design and construction of a lot of good constructive opinions and Suggestions are put forward.