石灰粉煤灰联合固化石油污染滨海盐渍土的力学特性

doi:10.13722/j.cnki.jrme.2016.0517

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Abstract

Physical and mechanical properties of oil contaminated soil is poor，thus improve its strength is the premise to reuse in engineering. Saline soil contaminated by oil was investigated and lime and fly ash were chosen as solidified materials. Unconfined compressive strength was analyzed to quantify the effectiveness and also to factors. Results indicate that：(1) lime and fly ash solidification can improved significantly the mechanical properties oil contaminated soil，the strength of solidified soil(12% lime and 20% fly ash) meets the strength requirements to secondary highway up and down embankment and foundation replacement in Specifications for Design of Highway Subgrades (JTG D30—2015)，as oil contaminated level less than 8%，the strength reach to requirements of expressway and arterial highway. (2) Stress-strain curve of solidified soil include linear load，nonlinear rising and decline phase，and it presents strain softening damage. With the increasing of oil contaminated level，the plastic deformation is enhanced. (3) Strength of solidified soil decreased as oil contaminated level sintensified，oil contamination reduces the reaction rate，and then weakens solidification among lime，fly ash and soil particles. (4) For oil contaminated level within 12%，the suitable solidified parameters are 12% lime，22% fly ash andcuring period of 28 d.

Key words： soil mechanics oil contaminated soil solidification with lime and fly ash unconfined compressive strength stress-strain curve saline soil in inshore

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	Articles by authors
	LI Min1
	2
	WANG Chen1
	DU Hongpu3
	ZHANG Jiaxin1

Cite this article:

LI Min1,2,WANG Chen1, et al. Mechanical properties of oil contaminated saline soil solidified with lime and fly ash[J]. , 2017, 36(S1): 3578-3586.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2016.0517 OR https://rockmech.whrsm.ac.cn/EN/Y2017/V36/IS1/3578

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