This paper summarizes the research status of municipal solid waste (MSW) constitutive models

which is very important to study geotechnical problems in landfills. MSW consists of a variety of inorganic and organic components and has high compressibility and biodegradability; and its physico-mechanical properties gradually change over time. In these existing models

it can be seen that MSW instantaneous deformation

mechanical creep

biodegradation

fiber reinforcement are taken into account. Unfortunately

various influence factors are considered in some models

respectively

or only are simply added in other models. The coupling effects of these factors are not taken into consideration. Furthermore

the future studies and development trend of MSW constitutive models are proposed based on the study of the constitutive models of soils. A variety of factors that influence the stress-strain behavior of MSW should be considered. Meanwhile

a breakthrough should be sought by combining the theories of geotechnical engineering

environmental engineering

chemical engineering and biological engineering. Finally

the theoretical framework for biodegradation

mechanical deformation

fluid flow and contaminant transport in MSW can be established.