城市新鲜垃圾抗剪强度参数模型研究

doi:10.13722/j.cnki.jrme.2014.1360

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Abstract To investigate the change regulation of waste?s shear strength parameters during the process of fill，the compression process and gradual change of shear displacement of the fresh municipal solid waste were taken into consideration，a large-scale combined test apparatus of compression and direct shear of municipal solid waste was used，and 288 fresh municipal solid waste testing samples were prepared in the laboratory. Three mixture proportions of the sample were adopted，and three initial void ratios were selected for each mixture proportion. Besides， four different vertical pressures were chosen for every initial void ratio，eight different compression times for each vertical pressure were selected，and ten different shear strain limiting values for each sample were considered. The testing results show that the cohesion force and the internal friction angle increase with the increasing of the shear strain limiting values，and a simple and practical logarithmic model is used to describe the relationship. Besides，the coefficients of the logarithmic model are discussed. Furthermore，the relationship between the coefficients of the model and the compression time is formulated，and the range of the fitted coefficients values is also given. The model can be used to predict the shear strength parameters of a new filled landfill，and provide a theoretical basis for the stability analysis of municipal solid waste landfills.

Key words： fresh municipal solid waste shear strength cohesion force internal friction angle logarithmic model

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.1360 OR https://rockmech.whrsm.ac.cn/EN/Y2015/V34/I9/20

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