【摘要】 本文利用中型动三轴仪对不同降解度的城市固体废弃物(MSW)的残余变形进行试验研究,分别采用应力水平相关的改进沈珠江模型和固结应力比相关的改进沈珠江模型对MSW的残余变形模型参数进行拟合,得出不同降解度MSW的残余变形参数值。研究表明:降解度为0%和50%的MSW的残余变形规律,均可以采用沈珠江改进模型进行模拟,应力水平指数为0.5或固结应力比指数为0.8时,参数拟合性均较好;在不同破坏标准下,随着降解度的增加,MSW的残余变形参数均逐渐减小。本文的研究成果对垃圾填埋场的抗震设计和垃圾填埋场震后变形的预估有重要的参考价值。更多还原

【Abstract】 Medium-scale dynamic triaxial tests were carried out to investigate the residual deformation behavior of Municipal Solid Waste(MSW) in different degree of biodegradation.Based on modified Shen Zhujiang models which are respectively related with stress level and consolidation stress ratio,parameters for modeling MSW residual deformation were derived for different degree of biodegradation.The research indicated: the residual deformation behavior can be simulated with modified Shen Zhujiang model in 0% and 50% degree of biodegradation.The parameters fitting is acceptable when the stress level index is 0.5 or the consolidation ratio index is 0.8.The MSW residual deformation parameters gradually reduce as degree of biodegradation increases under the different failure criterion.The results in this paper can be used as reference for seismic design and estimation of permanent displacement of landfill.更多还原