固结-固化复合技术分层加固淤泥的试验研究

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Abstract Research purposes: To save the construction cost, the layered reinforcement method is used to reinforce the soft sludge, and the consolidation and solidification composite technology is adopted to reinforce the sludge in the test site, so that the treated sludge can meet the bearing capacity requirements of the construction. For the shallow surface sludge, the solidification technology is used to greatly improve the strength of the shallow soil. For the deep sludge, the vacuum preloading technology is used to make the sludge consolidated by drainage, so as to improve the bearing capacity of the underlying stratum.
Research conclusions: (1) Solidified agent can generate considerable solidified effect on shallow sludge. When the solidified agent content is 4~8%, the characteristic value of bearing capacity in shallow solidified soil is 164~200 kPa. (2) The characteristic value of bearing capacity of sludge is just 40 kPa as the sludge is reinforced by only vacuum preloading. The consolidation and solidification composite technology is used to strengthen the sludge by layered reinforcement. When the solidified agent content is 4%~8%, the characteristic value of bearing capacity of the two-layered foundation is 96~170 kPa, and the shallow overlying crust has a significant effect on the soil bearing capacity. (3) For the two-layered foundation, the overlying crust has a certain stress diffusion effect. When the solidified agent content is 4%, the stress diffusion angle of the shallow solidified soil is 18.32°, which can effectively reduce the additional stress of the soft underlying stratum. (4) Consolidation and solidification composite technology can be used for large-scale reinforcement of coastal soft soil and sludge backfill soil foundation.

Key words： geotechnical engineering consolidation and solidification composite technology layered reinforcement method sludge stress diffusion angle

Received: 22 February 2021

PACS:

TU411

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	LUO Jiacheng
	SHAO Jicheng

Cite this article:

LUO Jiacheng,SHAO Jicheng. Experimental Research on the Layered Reinforcement of Sludge by Consolidation and Solidification Composite Technology[J]. Journal of Railway Engineering Society, 2022, 39(11): 19-24.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2022/V39/I11/19

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