高有机物含量新鲜生活垃圾压缩与渗透相关特性试验研究

doi:10.13722/j.cnki.jrme.2016.1176

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Abstract

To investigate the permeability of fresh municipal solid waste(MSW) during the process of gradually filling，a self-made permeability and compression combined test apparatus was used to perform 180 permeability and compression combined tests with 31 fresh MSW samples in geo-environmental laboratory，and the effects of pressure，compression time，compression strain and density were considered. Six different vertical pressures of 0，25，50，100，200 and 300 kPa were applied，and six compression times were 0，1，2，6，12 and 24 hours，were selected for every vertical pressure during the compression process. Besides，six hydraulic gradients were applied. Testing results showed that：(1) There exists a critical hydraulic gradient for the permeation of fresh MSW，the permeation will start only after the hydraulic gradient has reached the critical hydraulic gradient. (2) The relationship between permeation rate and hydraulic gradient can be formulated as a linear function that corresponds to Darcy's law. (3) The relationship between permeation rate and pressure can be formulated as an exponential function with the correlation coefficient greater than 0.93. (4) The relationship between logarithmic permeability coefficient and density can be formulated as a linear function with the correlation coefficients greater than 0.98. The equations that express this linear relationship are provided. (5) The relationship between logarithmic permeability coefficient and compression strain can also be formulated as a linear function，and the correlation coefficients are greater than 0.97. The equation express this relationship is also provided. The test results from this study can be used as reference for the permeability analysis of a municipal solid waste landfill.

Key words： soil mechanics fresh municipal solid waste compressive strain density permeability coefficient critical hydraulic gradient Darcys law

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	Articles by authors
	ZHANG Zhenying
	DING Zhengkun
	WANG Yingfeng
	WU Dazhi
	ZHANG Zhipeng

Cite this article:

ZHANG Zhenying,DING Zhengkun,WANG Yingfeng, et al. Experimental study on the compression and permeability combined test of fresh municipal solid waste with higher organic matter[J]. , 2018, 37(S1): 3645-3651.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2016.1176 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/IS1/3645

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