生活垃圾腐殖土土工特性室内试验研究

Laboratory study on the geotechnical properties of humus soil from municipal solid waste landfill

为探究垃圾填埋场内腐殖土的土工特性随填埋深度的变化规律,以陈旧型垃圾填埋场内不同填埋深度的腐殖土为研究对象,采用室内试验和理论分析相结合的方法研究腐殖土的理化性质和力学性质。研究结果表明:随着填埋深度的增加,陈腐垃圾中腐殖土的占比以及颗粒级配、有机质含量、比重和浸出液pH值等理化性质均发生变化,进而影响腐殖土的抗压强度、抗剪强度、饱和渗透性和压缩性等力学性质。研究结果为腐殖土的资源化利用提供了理论参考。

In order to explore the variation law of geotechnical properties of landfill humus soil with landfill depth,taking humus soil with different landfill depths in old landfills as the research object,the method of combining laboratory test and theoretical analysis was used to study the physicochemical properties and the mechanical properties of humus soil.The results show that with the increase in landfill depth,the proportion of humus soil in municipal solid waste and the physicochemical properties of humus soil such as particle size distribution,organic matter content,specific gravity and pH value of the leaching solution all change,which further affects the mechanical properties such as compressive strength,shear strength,saturated permeability and compressibility.These conclusions provide theoretical reference for the resource utilization of humus soil.