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新鲜生活垃圾抗剪强度参数变化规律研究

张振营, 严立俊, 吴大志, 章凌峰, 傅军, 胡渊杰

张振营, 严立俊, 吴大志, 章凌峰, 傅军, 胡渊杰. 新鲜生活垃圾抗剪强度参数变化规律研究[J]. 岩土工程学报, 2015, 37(3): 432-439. DOI: 10.11779/CJGE201503006
引用本文: 张振营, 严立俊, 吴大志, 章凌峰, 傅军, 胡渊杰. 新鲜生活垃圾抗剪强度参数变化规律研究[J]. 岩土工程学报, 2015, 37(3): 432-439. DOI: 10.11779/CJGE201503006
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ZHANG Zhen-ying, YAN Li-jun, WU Da-zhi, ZHANG Ling-feng, FU Jun, HU Yuan-jie. Experimental study on shear strength parameters of fresh municipal solid waste[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(3): 432-439. DOI: 10.11779/CJGE201503006
Citation: ZHANG Zhen-ying, YAN Li-jun, WU Da-zhi, ZHANG Ling-feng, FU Jun, HU Yuan-jie. Experimental study on shear strength parameters of fresh municipal solid waste[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(3): 432-439. DOI: 10.11779/CJGE201503006
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新鲜生活垃圾抗剪强度参数变化规律研究  English Version

  • 浙江理工大学建筑工程学院,浙江 杭州 310018

基金项目: 国家自然科学基金项目（51178432,50878197,51478436）; 浙江省自然科学基金项目（LY14E080021）; 浙江理工大学研究生创新研究项目（YCX13031）; 浙江省大学生创新活动计划暨新苗人才计划项目（2013R406038）
详细信息
    作者简介:

    张振营（1963- ）,男,博士,教授,主要从事土力学及环境岩土工程教学与科研工作。E-mail: zhangzhenyinga@163.com。

  • 中图分类号: TU443

Experimental study on shear strength parameters of fresh municipal solid waste

  • School of Civil Engineering and Architecture, Zhejiang Sci-Tech University, Hangzhou 310018, China

摘要

    摘要
  • 摘要: 在环境土工实验室,人工配制新鲜生活垃圾试样,采用大型压缩与直剪联合测定仪器,对288个垃圾试样抗剪强度参数的变化规律进行了研究。将生活垃圾分为3大类,模拟城市经济发展的不发达、发展中及发达3个阶段,将生活垃圾分为3大配比。试验采用3种初始孔隙比（2.1,2.5,2.9）、4级竖向压力（25,50,100,200 kPa）,每级压力作用下的时间分别为0,0.25,0.5,1,2,6,12,24 h,研究了10种剪应变限值（2%,4%,6%,8%,10%,12%,14%,16%,18%,20%）新鲜垃圾的抗剪强度参数。试验结果表明,新鲜垃圾的抗剪强度与竖向压力可以拟合为一条直线,符合库仑定律。随着剪应变限值的增加,抗剪强度参数c值和φ值均有增加的趋势,符合对数模型。给出了不同因素影响下,新鲜生活垃圾c值和φ值的取值范围,c值在6.14~34.17 kPa之间、φ值在4.1°~30.6°之间。
    Abstract: To investigate the laws of the shear strength parameters of fresh municipal solid waste (MSW), the compression-direct shear combined tests are carried out by using large-scale combined test apparatus of compression and direct shear. Two hundred and eighty-eight fresh MSW testing samples are prepared in geo-environmental laboratory. The components of fresh MSW are divided into three parts, and three mixture proportions are given to simulate the three stages of urban economic development, which are underdeveloped, developing and developed. The initial void ratios of the samples are selected as 2.1, 2.5 and 2.9. Four different vertical pressures, 25, 50, 100 and 200 kPa, are chosen, and the compression time for every vertical load is 0, 0.25, 0.5, 1, 2, 6, 12 and 24 hours, respectively. The shear strength parameters for ten different shear strain limit values, which are 2%, 4%, 6%, 8%, 10%, 12%, 14%, 16%, 18% and 20%, are studied. The test results show that the relationship between the shear strength and the vertical load applied on the test samples is in conformity with the Coulomb’s law. Besides, the cohesion force and the internal friction angle of the fresh MSW increase with the increase of the shear strain limit value, and a logarithmic model can be used to describe the relationship. Furthermore, the shear strength parameters of the fresh MSW under various conditions are obtained. It is found that the cohesion force varies from 6.14 to 34.17 kPa, and that the internal friction angle varies from 4.1 to 30.6 degrees.
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    • 参考文献(19)
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出版历程
  • 收稿日期:  2014-06-17
  • 发布日期:  2015-03-23

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