应力耦合效应下砂层劈裂注浆力学机制分析

doi:10.11896/cldb.24050091

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Abstract The compaction splitting effect generated under grouting pressure can effectively improve the overall mechanical properties of weak media such as sand layers. In this work, the diffusion process of split grouting was simplified as a dynamic radiation circle, considering the nonli-near compaction characteristics of the sand layer under grouting pressure, and the dynamic coupling effect of sand stress field and slurry flow field, a theoretical model of split grouting diffusion was established. Analyzed the spatial attenuation law of grouting pressure and splitting width, as well as the variation characteristics of grouting diffusion distance and grouting pressure. The results show that linear models will acquire a larger splitting width and diffusion radius because of irrespective of the increase in compressive modulus caused by compaction, . In order to effectively control the grouting reinforcement process in sandy soil layers, it is necessary to consider the nonlinear compaction characteristics of sand layers in the design and calculation of splitting grouting. Through the verification of Tianjin Rail Transit Engineering, it was found that the theoretical calculation results here are 18%—27% larger than the measured results, but these still meet the design requirements of relevant technical specifications and standards, indicating the applicability of the theoretical model in this work.

Key words： complex coupling effects nonlinear model elastic theory splitting diffusion mechanics mechanism

Published: 10 July 2025 Online: 2025-07-21

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TU443

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	QIN Pengfei
	GUO Yanqin
	GAO Ruiyuan

Cite this article:

QIN Pengfei,GUO Yanqin,GAO Ruiyuan. Mechanical Mechanism Analysis of Sand Layer Splitting Grouting Under Stress Coupling Effect[J]. Materials Reports, 2025, 39(13): 24050091-5.

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https://www.mater-rep.com/EN/10.11896/cldb.24050091 OR https://www.mater-rep.com/EN/Y2025/V39/I13/24050091

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