冻融循环作用下垃圾填埋场土体力学性质改变的现状研究

Research on Current Situation of Mechanical Property Change in Landfill Soil in Freeze-thaw Cycle

针对垃圾填埋场中土体冻融循环后力学性质的改变以及所产生的土体不均匀沉降问题,通过对大量国内外文献的阅读,分析了垃圾填埋场土体冻融循环后力学性质改变的机理,同时就目前国内外对土体冻融循环研究存在的问题,利用试验和数值模拟相结合的研究方法,为实际工程提供科学的理论依据。如在垃圾填埋场封场时,利用大型机械对表层土体压实来减少垃圾填埋场的不均匀沉降。

In view of the mechanical property changes in landfill soil in freeze-thaw cycles and the uneven settlement of the soil,after reading a large number of domestic and oversea documents,we analyzed the mechanism of mechanical property changes in landfill soil in freeze-thaw cycles.At the same time,after studying the problem of'freeze-thaw cycles',we combined the research methods by using experiments and numerical simulation to provide a scientific theoretical basis for the practical engineering.For example,when the landfill is closed,the surface soil is compacted with large machinery to reduce the uneven settlement of landfill.