城市固体废弃物剪切强度参数的研究

为了在填埋场稳定性分析时合理地选取城市固体废弃物剪切强度参数，参照杭州天子岭填埋场城市固体废弃物的主要成分，人工配制固体废弃物试样，利用大型三轴剪力仪进行固结排水剪试验，延伸岩土工程中研究土体的概念和方法，研究城市固体废弃物的剪切强度特性.城市固体废弃物的黏聚力和摩擦角随着轴向应变的增加逐渐增大，摩擦角增长较为平缓，应变较大时达到峰值，黏聚力主要由纤维状加筋相所产生，增长趋势较快.结合国内外大量的强度参数资料，提出了两种典型城市固体废弃物成分的强度参数，可以用于成分相近的填埋场稳定分析中.

Study on shear strength parameters of municipal solid waste

The shear strength parameters of municipal solid waste(MSW) should be rationally chosen in the stability analysis of landfill. To investigate the shear strength characteristics of MSW, consolidation drained shear tests were conducted using large-scale triaxial apparatus on MSW samples simulating the compositions of MSW from the Hangzhou Tianziling Landfill. Reported studies on the shear strength of MSW were mostly based on the extension of traditional geotechnical concepts and methods. The friction angle and the cohesion intercept were mobilized following different patterns, the friction angle tended to be fully mobilized at large strain values, while the MSW cohesion intercept provided by the fiber was mobilized rapidly, and the limiting value was usually not observed. A large volume of testing data was analyzed to obtain the shear strength parameters of two typical MSW samples presented here, which can be used in the stability analysis of similar composition landfills.