电渗注浆加固土遗址片状剥离试验研究(Ⅲ)：回压试验与加固机制

doi:10.3724/1000-6915.jrme.2025.0047

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Abstract Performing back compression on the scaling-off-stabilized grout body is a crucial aspect of reinforcing earthen sites affected by scaling through electro-osmotic grouting methods. This study involved on-site experiments to assess scaling-off reinforcement by implementing two distinct back compression modes. It evaluated the normal compression of the grouted body under varying back compression conditions, identified characterization indicators for the reinforcement effect of the back-compression-stabilized grout body, and analyzed the relationship between the work done by back compression and the energy efficiency ratio. Microstructural analysis and principal component analysis were employed to elucidate the reinforcement mechanism of the electro-osmotic grouting method from both qualitative and quantitative perspectives. The research findings indicate that the normal compression of the grouted body under different back compression modes, the characterization indicators of the reinforcement effect of the back-compression-stabilized grout body, and the work done by back compression all increase non-linearly with the rise in back-compression levels. Conversely, the energy efficiency ratio declines non-linearly as back-compression levels increase. Notably, the performance of back compression at a constant force of 25 kPa is found to be optimal in a comprehensive assessment. The synergistic effect of SH solution solidification and back compression enhances the interfacial connections between soil particles, establishes a stable combination with effective force chain transmission, and significantly improves resistance to scaling-off reinforcement.

Key words： soil mechanics scaling off electroosmotic grouting back compression principal component analysis reinforcement mechanism

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	Articles by authors
	CUI Kai1
	2
	LI Shuhuan1
	2
	XU Pengfei1
	2
	WEI Xin1
	2
	WEN Xiangyu1
	2
	PEI Qiangqiang3

Cite this article:

CUI Kai1,2,LI Shuhuan1, et al. Electro-osmosis grouting reinforcement of scaling off earthen sites(III): Back compression experiment and reinforcement mechanism[J]. , 2025, 44(10): 2793-2803.

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https://rockmech.whrsm.ac.cn/EN/10.3724/1000-6915.jrme.2025.0047 OR https://rockmech.whrsm.ac.cn/EN/Y2025/V44/I10/2793

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