不同钙源EICP溶液改良路基黄土动力特性研究

doi:10.11896/cldb.22110275

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Abstract The strength of subgrade bed in loess area is small, and engineering problems such as uneven settlement, landslide or collapse usually occur under long-term dynamic pressure. In order to make the strength of loess under dynamic load more suitable for practical engineering, it is necessary to further study the improvement effect of different calcium source EICP solution on the dynamic strength of loess. Loess from a foundation pit in Shaanxi province was taken as the research object, environmental friendly calcium lignosulfonate was introduced into the cementing fluid to replace the traditional calcium source for technical improvement, combined with indoor dynamic triaxial test, the curing effect of EICP solution of three calcium sources on loess was compared under different confining pressures.The results show that: EICP solution can effectively improve the dynamic strength of loess. Under the same confining pressure, the dynamic stress and damping ratio of loess samples gradually increase with the increase of strain, while the dynamic shear modulus gradually decreases with the increase of strain. When the confining pressure is small, the calcium acetate source EICP solution has better effect on improving the dynamic strength of loess, and when the confining pressure is large, the wood calcium source EICP solution has better effect on improving the dynamic strength of loess. The larger the confining pressure of the same sample, the larger the dynamic strength and dynamic shear modulus, and the smaller the damping ratio.

Key words： road engineering loess enzyme induced carbonate precipitation (EICP) calcium lignosulfonate dynamic strength

Published: 10 May 2024 Online: 2024-05-13

CLC number:

TU458

Fund:Youth Innovation Team of Shaanxi Universities.

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	Articles by authors
	TIAN Wei
	YUN Wei
	DANG Kexin
	LI Teng

Cite this article:

TIAN Wei,YUN Wei,DANG Kexin, et al. Study on Dynamic Characteristics of Subgrade Loess Improved by EICP Solution with Different Calcium Sources[J]. Materials Reports, 2024, 38(9): 22110275-9.

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http://www.mater-rep.com/EN/10.11896/cldb.22110275 OR http://www.mater-rep.com/EN/Y2024/V38/I9/22110275

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