摘要
好氧降解作用对垃圾土沉降变形特性的定量评价是预测和评估好氧降解稳定化的重要基础。以武汉市典型生活垃圾组成配比人工制作的垃圾土为样本,开展了不同通风条件下垃圾土沉降特性试验,分析了好氧通风频率对沉降变形的影响。试验结果表明:厌氧条件沉降速率趋于稳定后,好氧通风可显著提高垃圾土的沉降速率;上、中、下3层垃圾在高通风频率下垃圾土沉降比低通风频率下沉降效率分别提高了145%、150%、100%;建立了厌氧-好氧联合型沉降模型,通过与试验监测得到的沉降值对比,初步验证了模型的可靠性。研究结果为好氧通风过程中垃圾土沉降稳定性评估提供了理论依据。
The quantitative evaluation of the settlement characteristics of landfills by aerobic degradation is an important basis for predicting and evaluating the stabilization of aerobic degradation. The settlement characteristics of man-made waste soil with typical household waste composition ratio in Wuhan were tested under different ventilation conditions, and the influence of aerobic ventilation frequency on settlement deformation was analyzed. The results showed that aerobic ventilation significantly increased the settlement rate of municipal solid waste under anaerobic condition when the settlement rate was stable. The settlement efficiency of the upper, middle and lower layers of waste soil at high ventilation frequency was increased by 145%, 150% and 100% respectively,compared with the settlement efficiency at low ventilation frequency. Also, an anaerobic-aerobic combined settlement model(ANACS model) was established, and the reliability of the model was verified by comparing against the settlement values obtained from experimental monitoring. Outcomes from this study provide a theoretical basis for the evaluation of the settlement stability of waste soil in aerobic ventilation process.
作者
金佳旭
丁前绅
刘磊
威巍
张雄
张柴
JIN Jia-xu;DING Qian-shen;LIU Lei;WEI Wei;ZHANG Xiong;ZHANG Chai(School of Civil Engineering,Liaoning Technical University,Fuxin,Liaoning 123000,China;State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,Hubei 430071,China;Hubei Province Key Laboratory of Contaminated Sludge and Soil Science and Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,Hubei 430071,China;IRSM-CAS/HK PolyU Joint Laboratory on Solid Waste Science,Wuhan,Hubei 430071,China;University of Chinese Academy of Sciences,Beijing 100049,China;Wuhan Environment Investment&Development Co.,Ltd.,Wuhan,Hubei 430019,China;School of Mechanics and Engineering,Liaoning Technical University,Fuxin,Liaoning 123000,China)
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2022年第2期416-422,共7页
Rock and Soil Mechanics
基金
国家自然科学基金(No.41977254,No.51974145)
湖北省自然科学基金杰出青年基金(No.2021CFA096)
湖北省自然科学基金——创新群体项目(No.2019CFA012)
岩土及地下工程教育部重点实验室(同济大学)开放课题(KLE-TJGE-B2001)。
关键词
垃圾土
厌氧条件
好氧条件
沉降
模型
waste soil
anaerobic condition
aerobic condition
settlement
model
作者简介
第一作者:金佳旭,男,1984年生,博士,副教授,主要从事环境岩土工程方面的研究。E-mail:jjx_605@163.com;通讯作者:刘磊,男,1982年生,博士,研究员,主要从事固体废弃物安全处置与资源化利用的研究工作。E-mail:lliu@whrsm.ac.cn。
