土木建筑工程

城市垃圾炉渣变形特性的三轴试验

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  • 上海交通大学 船舶海洋与建筑工程学院,上海 200030
宋丹青(1989-),男,博士生,主要从事岩土工程等研究.

收稿日期: 2015-11-16

  修回日期: 2016-01-22

  网络出版日期: 2016-06-05

基金资助

国家自然科学基金资助项目(41401107);国家重点基础研究发展计划(973 计划)项目(2014CB744701)

Triaxial Tests of Deformation Characteristics of Bottom Ash from Municipal Solid Waste Incineration

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  • School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiaotong University,Shanghai 200030,China
宋丹青(1989-),男,博士生,主要从事岩土工程等研究.

Received date: 2015-11-16

  Revised date: 2016-01-22

  Online published: 2016-06-05

Supported by

Supported by the National Natural Science Foundation of China(41401107)and the National Program Key Basic Research Project of China(973 Program)(2014CB744701)

摘要

为研究垃圾炉渣的变形特性,首先对其材料特性进行分析,然后针对不同粒径分布、浸水时间及破坏后的重塑垃圾炉渣进行饱和三轴固结排水剪切试验,测得不同围压下的固结排水剪应力–应变曲线以及有效应力比曲线形态等工程特性. 结果表明:炉渣的粒径分布、浸水时间是影响炉渣变形特性的重要因素;对于粒径不大于2mm 的炉渣,其强度随大颗粒含量的增加而减小,随浸水时间的延长而小幅度降低;破坏后重塑试样的强度与初始试样相比也有所下降;与标准砂相比,炉渣的应力–应变曲线峰值出现得相对较快.

本文引用格式

宋丹青 项国圣 . 城市垃圾炉渣变形特性的三轴试验[J]. 华南理工大学学报(自然科学版), 2016 , 44(7) : 116 -122 . DOI: 10.3969/j.issn.1000-565X.2016.07.018

Abstract

In order to discover the deformation characteristics of MSWI (Municipal Solid Waste Incineration) bot- tom ash,the material characteristics were analyzed,and consolidated triaxial draining compression tests were car- ried out for the samples with various particle size distribution and immersion time as well as for the remoulded sam- ples after destruction.Thus,the stress-strain curves and effective stress ratio curves of MSWI bottom ash at diffe- rent confining pressures were obtained.The results show that (1) particle size distribution and immersion time are two important factors influencing the deformation characteristics of MSWI bottom ash; (2) for the samples with a particle size being less than 2mm,the strength decreases as the content of large-size particles increases and slightly decreases with the prolonging of immersion time; (3) the strength of remoulded MSWI bottom ash decreases after the destruction; and (4) in comparison with that of the standard sand,the peak of stress-strain curve of MSWI bot- tom ash appears relatively faster.

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