摘要
垃圾腐殖土的力学特性参数对其在岩土工程中的再利用具有重要意义。以填埋场现场取回的腐殖土为对象,基于饱和渗透性试验、无侧限抗压强度试验、直接剪切试验和固结压缩试验,分析了填埋龄期和压实度对压实腐殖土试样力学特性的影响规律,并探讨了其影响机制。结果表明,压实腐殖土饱和渗透系数处于10^(-5)~10^(-7)cm/s数量级范围内,且随着填埋龄期和压实度的增大,饱和渗透系数均减小并趋于稳定值;填埋龄期和压实度对压实腐殖土的力学性质影响显著,无侧限抗压强度、弹性模量、黏聚力和压缩模量整体上均随填埋龄期和压实度的增大而增大,而压缩系数随填埋龄期和压实度的增大而减小。以上成果为垃圾腐殖土再利用提供了关键理论支撑。
The mechanical properties of waste humus soil are of great significance to its reuse in geotechnical engineering.The humus soil retrieved from the landfill site was used as the object,based on saturation permeability test,unconfined compressive strength test,direct shear test and consolidation compression test,the influence of landfill age and compaction degree on the mechanical properties of humus samples was analyzed,and discussed the influence mechanism.The results showed that the permeability coefficient of the compacted humus was in the order of 10^(-5)-10^(-7) cm/s,and with the increase of landfill age and compaction degree,the permeability coefficient all decreased and tended to a stable value.The mechanical properties of compacted humus soil were significantly affected by landfill age and compacted degree,the unconfined compressive strength,elastic modulus,cohesive force and compression modulus all increased with the increase of landfill age and compaction degree.While the compression coefficient decreased with the increase of landfill age and compaction degree.The above results provided key theoretical support for the reuse of humus soil.
作者
盛宴
林焕生
杜月林
丁前绅
刘磊
SHENG Yan;LIN Huansheng;DU Yuelin;DING Qianshen;LIU Lei(Shenzhen Tagen Pingshan Construction Engineering Co.Ltd.,Shenzhen Guangdong 518118;Wuhan Hanyang Municipal Construction Group Co.Ltd.,Wuhan Hubei 430000;College of Mechanics and Engineering,Liaoning Technical University,Fuxin Liaoning 123000;State Key Laboratory of Geomechanics and Geotechnical Engineering,Wuhan Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan Hubei 430071;Hubei Province Key Laboratory of Contaminated Sludge and Soil Science and Engineering,Wuhan Hubei 430071)
出处
《环境卫生工程》
2024年第5期104-111,共8页
Environmental Sanitation Engineering
关键词
生活垃圾
腐殖土
力学性质
填埋龄期
压实度
domestic waste
humus soil
mechanical characters
landfill age
degree of compaction
