MBT垃圾基本土工特性室内试验研究

doi:10.13722/j.cnki.jrme.2018.0101

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Abstract Mechanical-biological treatment(MBT) has the advantage of significantly reducing the amount of municipal solid waste. Therefore，MBT waste has become a hot global research topic in geo-environmental engineering. In order to understand the basic geotechnical characteristics of waste more comprehensively，MBT waste samples were collected from Tianziling landfill in Hangzhou，and tests were conducted，including a composition analysis，sieve analysis，water content test，specific gravity test，natural density test，compression test，direct shear test，and permeability test. The main components of the MBT waste from this site were plastic，glass，and dust soils，which accounted for 57% of the total wet mass. The uniformity coefficient of the MBT waste was 21.4，and the curvature coefficient was 1.93. The relationship between the void ratio and the logarithmic pressure was fitted linearly，and the compression index was calculated to be 0.726，indicating the high compressibility of the MBT waste. The shear strength of the MBT waste conformed to Coulomb?s law. The cohesion was 10.8 kPa，and the internal friction angle was 44.5°. The permeability coefficient decreased with increasing vertical pressure. The relationship between the logarithmic permeability coefficient and vertical pressure was fitted linearly. The permeability coefficients of the MBT wastes were in the range of 10－2–10－6 cm/s. These conclusions can provide reference for prediction of reservoir capacity, stability analysis and design of seepage drainage system in an MBT landfill.

Key words： soil mechanics MBT waste uniformity coefficient compression index shear strength permeability coefficient

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	Articles by authors
	ZHANG Zhenying
	ZHANG Yuxiang
	GUO Wenqiang
	WU Dazhi
	XU Hui
	WANG Yingfeng

Cite this article:

ZHANG Zhenying,ZHANG Yuxiang,GUO Wenqiang, et al. Laboratory study on the geotechnical properties of MBT waste[J]. , 2018, 37(9): 2170-2179.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2018.0101 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/I9/2170

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