地层注浆附加土压力形成及影响因素单元体试验研究

doi:10.13722/j.cnki.jrme.2023.0082

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Abstract Soil grouting has become an important technology for deformation recovery of existing tunnels，in order to explore the formation mechanism and influencing factors of slurry diffusion and additional soil pressure during grouting，a unit test for ground grouting has been designed.The grout with different water contents has been injected into sandy soil and rubber particle formations respectively，to explore the diffusion mode of slurry and the formation law of additional soil pressure during the grouting process using model experiments.The test results are as follows. (1) Pore water pressure dissipation will occur after the grout is injected into the formation soil，and the larger the soil porosity is，the faster the water pressure dissipation rate will be. (2) During grouting，the diffusion mode of grout in the stratum soil is closely related to the soil porosity and water content of grout. (3) When the slurry is still，the static water pressure will dissipate，the slurry volume will gradually reduce，and the additional earth pressure value will also gradually decrease. (4) During deformation recovery grouting，the change of additional earth pressure shall be monitored in real time，and multi-point grouting technology shall be adopted when injecting grout with low water content into sandy soil layer.

Key words： tunnelling engineering shield tunnel resume grouting additional earth pressure unit body model test

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	Articles by authors
	HUANG Dawei1
	2
	LUO Zhongrui1
	2
	LUO Wenjun1
	2
	ZHU Bitang1
	2
	LIU Jiaxuan1
	2
	ZHAO Zhiqi1
	2

Cite this article:

HUANG Dawei1,2,LUO Zhongrui1, et al. Unit test study on formation and influence factors of additional earth pressure during formation grouting[J]. , 2024, 43(S1): 3520-3529.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2023.0082 OR https://rockmech.whrsm.ac.cn/EN/Y2024/V43/IS1/3520

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