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城市固体废弃物(MSW)是由多种无机和有机成分组成的复合材料,具有高压缩性和可降解性。随着时间的变化,基本的物理力学特性发生变化,与传统土体相比,性质差异较大。城市固体废弃物的本构模型对于垃圾填埋场中土工问题的研究极其重要,考虑不同因素的影响,系统总结了国内外一些学者对MSW本构模型的研究现状,指出已有的研究成果主要考虑了荷载引起的瞬时变形、机械蠕变、生物降解、纤维物质的加筋作用等,但这些都是考虑单个因素或者将几个因素简单叠加的本构模型,并未考虑不同因素的耦合作用。结合土体本构模型的发展特点,指出了今后城市固体废弃物本构模型的研究方向和发展趋势:应当综合考虑各种因素对MSW应力-应变关系的影响,从工程实践出发,通过岩土工程、环境工程、化学工程和生物工程等学科的交叉寻求突破,形成考虑生化反应-骨架变形-水气运移-溶质迁移耦合作用的理论框架。
Municipal solid waste (MSW) is a composite of a variety of inorganic and organic ingredients, with high compressibility and degradability. As the time changes, the basic physical and mechanical properties change, compared with the traditional soil, the nature of the larger differences. The constitutive model of MSW is very important for the geotechnical problems in landfills. Considering the influence of different factors, some scholars at home and abroad have summarized the research status of MSW constitutive model, and pointed out that the existing research results mainly Considering the instantaneous deformation caused by load, mechanical creep, biodegradation, the reinforcing effect of fibrous materials, etc., these are all constitutive models that consider a single factor or simply superpose several factors without considering the coupling effect of different factors . Combined with the development characteristics of soil constitutive model, the research direction and development trend of MSW constitutive model are pointed out. The influence of various factors on the stress-strain relationship of MSW should be comprehensively considered. From engineering practice, Engineering, environmental engineering, chemical engineering and bioengineering and other disciplines to seek a breakthrough breakthrough, the formation of a biochemical reaction - the framework of deformation - the migration of water and gas - the theoretical framework of solute transport coupling.