水平排水板真空预压–碱激发矿渣固化联合法处理高含水率淤泥的试验研究

doi:10.13722/j.cnki.jrme.2023.0040

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Abstract Dredged mud slurry has the characteristics of high water content，low or negligible strength and low hydraulic conductivity. Rapid and efficient treatment and utilization of these slurry are of great significance. This paper conducted a series of experimental to study the rapid treatment of high water content slurry using the combined method of prefabricated horizontal drain vacuum preloading and chemical solidification(abbreviated as PHDVPS). The solidifying agents used in the experiment included magnesium oxide(MgO)-activated ground granulated blast furnace slag(GGBS) and Portland cement. The treatment effect and efficiency of the combined method were compared with those of pure vacuum preloading method. Variation of discharged water mass and slurry volume were monitored during the vacuum preloading stage of the model tests，after which the unconfined compressive strength (UCS) of soil samples at different curing ages was tested，and the microstructures of the treated soils were analyzed. The experiment results indicates that PHDVPS method has a significantly better volume reduction efficiency and a significantly better reinforcement effect than the pure vacuum preloading method. The solidifying agent produces flocculation effects，which improve the vacuum dewatering efficiency，leaving the subsequent solidification process occurring in a denser state of soil matrix and thus achieving much higher strength. Moreover，using GGBS-MgO as the solidifying agent in PHDVPS method has better volume reduction and strength improvement effects than using cement.

Key words： soil mechanics high-water-content mud slurry prefabricated horizontal drain vacuum preloading solidification alkali-activated blast furnace slag model test

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	Articles by authors
	SONG Dingbao1
	PU Hefu1
	HU Hailan2
	LI Zhanyi3
	ZHANG Chunxue4

Cite this article:

SONG Dingbao1,PU Hefu1,HU Hailan2, et al. Experimental investigation on prefabricated horizontal drain-based vacuum preloading-alkali-activated GGBS solidification combined method for #br# treatment of high-water-content mud slurry[J]. , 2023, 42(12): 3109-3119.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2023.0040 OR https://rockmech.whrsm.ac.cn/EN/Y2023/V42/I12/3109

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