基于垃圾分类的垃圾土压缩特性研究  

Research on Compression Characteristics of Waste Soil Based on Waste Classification

作　　者：陈亦凡 李磊[1] 曹俊 穆俊杰 CHEN Yifan;LI Lei;CAO Jun;MU Junjie(School of Earth Science and Engineering,Hohai University,Nanjing Jiangsu 211100;Institute of Water Science and Technology,Hohai University,Nanjing Jiangsu 211106;Jiangsu Suyan Jingshen Co.Ltd.,Huai’an Jiangsu 223001)

机构地区：[1]河海大学地球科学与工程学院,江苏南京211100 [2]河海大学水科学研究院,江苏南京211106 [3]江苏苏盐井神股份有限公司,江苏淮安223001

出　　处：《环境卫生工程》2025年第1期1-8,共8页Environmental Sanitation Engineering

基　　金：国家重点研发计划项目(2022YFC3202704)。

摘　　要：生活垃圾中的厨余垃圾被分出后,垃圾组分的变化导致垃圾土的压缩特性发生改变,进而影响填埋场库容以及扩建的设计参数取值等。为研究垃圾组分发生变化后的垃圾土压缩特性,对厨余含量为30%、20%、10%、0的垃圾土样开展室内固结压缩试验。结果表明:垃圾土的修正主压缩指数随厨余含量减少而下降,新鲜垃圾土对应力变化具有较高的敏感性,在逐渐施加固结应力下其固结系数由10-4cm^(2)/s下降为10-5cm^(2)/s量级,而分类后的垃圾土对应力变化敏感性较低。在不同应力条件下对次压缩指数数据的分析表明,低应力条件下厨余含量变化对次压缩特性影响较大,随着应力增大,厨余含量变化对次压缩特性影响减小。After the kitchen waste is separated from the domestic waste,the changes of waste component leads to the changes of compression characteristics of waste soil,which affects the landfill capacity and design parameter values for expansion.In order to study the compression characteristics of waste soil after the changes of waste component,indoor consolidation compression tests were carried out on the waste soil samples with kitchen waste contents of 30%,20%,10%and 0.The results showed that the modified primary compression index of waste soil decreased with the reduction of kitchen waste content.The fresh waste soil had a high sensitivity to stress changes,and its consolidation coefficient decreased from 10-4cm^(2)/s to 10-5 cm^(2)/s under the gradual application of consolidation stress,while the classified waste soil was less sensitive to stress changes.The analysis of the secondary compression index data under different stress conditions showed that the changes of kitchen waste content had a great influence on the secondary compression characteristics under lower stress conditions,and the influence of the changes of kitchen waste content on the secondary compression characteristics decreased with the increase of stress.

关 键 词：垃圾分类 厨余含量 压缩特性 固结系数 

分 类 号：X799.3[环境科学与工程—环境工程] X703