武汉某填埋场陈垃圾土承载特性研究  

Bearing Behavior of an Aged Municipal Landfill in Wuhan

作　　者：蒋善超[1] 文松霖[1] 任佳丽[1] 

机构地区：[1]长江科学院水利部岩土力学与工程重点实验室,武汉430010

出　　处：《土工基础》2016年第2期161-163,170,共4页Soil Engineering and Foundation

摘　　要：卫生填埋场封场后的再利用已迫在眉睫,而陈垃圾土是一种非常特殊的土,变形机理复杂。通过现场载荷试验和数值模拟,分析探讨了陈垃圾土的变形特征及承载特性。研究结果表明,荷载较小时陈垃圾土压缩性较高,但随荷载增加纤维组分起到加筋作用,承载性能反而有所提高;陈垃圾土在荷载下的变形可分为四个阶段,应力应变关系可用两段Kondner建议的曲线拟合。The re-utilization of the capped and aged municipal landfills becomes more and more urgent due to the limited land resource.Due to its highly heterogeneous in nature,the aged municipal landfills is a special soil with high variable compressibility.The bearing capacity characterization of the aged municipal landfill soils was evaluated through the field plate loading tests as well as the numerical analysis.The results indicate that,when the loading level is low,a high compressibility was demonstrated.When the loading level is higher,the fibrous components in the landfill served as reinforcement,a lower compressibility could be obtained.The entire stress strain curve can be divided into four different stages and it can be fitted using the the curves suggested by Konder.

关 键 词：陈垃圾土 载荷试验 数值模拟 承载特性 

分 类 号：TU449[建筑科学—岩土工程]