Field validation of a detectable, magnetic, cementitious grout for rock fracture grouting

Corson, Lindsey T.; Reid, Christopher; Lunn, Rebecca; Mountassir, Gráinne El; Henderson, Alasdair E.; Henderson, Kenneth W.; Pagano, Arianna Gea; Kremer, Yannick

doi:10.1016/j.ijrmms.2021.104853

Cited by 5 publications

(2 citation statements)

References 14 publications

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“…For example, certain scholars have systematically analyzed the grouting effect through numerical analysis. This approach makes the migration of grouting in the ideal state more intuitive and reveals that grouting can change the permeability and porosity of rock, change the crack and pore size distribution of rock, and also improve the compactness and strength of fractured rock. − Other scholars considered the theoretical basis of fluid mechanics and the distribution state of cracks and established analytical formulas such as grouting diffusion range and diffusion speed. − To evaluate the rock strength after grouting, Zhang et al established a preliminary theoretical model and an empirical formula for rock strength after grouting, which enabled prediction of the rock strength after grouting. In summary, scholars worldwide mainly use theoretical analysis, experimental analysis, and numerical simulation to evaluate the slurry diffusion and the effect of rock mass reinforcement, which greatly enriches and develops grouting theory.…”

Section: Introductionmentioning

confidence: 99%

Analytical Solution of the Grouting Reinforcement Response of a Circular Cavern in Deeply Buried Fractured Surrounding Rock under a Nonuniform Stress Field

Liu

Lyu

et al. 2022

ACS Omega

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Grouting is widely utilized to reinforce fractured surrounding rock. However, presently, the secondary stress distribution of fractured surrounding rock after grouting is not distinct, which hinders the accurate evaluation of the grouting effect. Therefore, a complex variable function solution is provided for the evolution of the stress field and the displacement field around the reinforced fractured surrounding rock subjected to a nonuniform load. By comparing the evolution of the stress and radial displacement fields around the cavern, the reinforcement effect on the fractured surrounding rock is quantitatively confirmed. The results show that grouting has an obvious modification effect on fractured surrounding rock: its radial stress and circumferential stress fields are affected to different degrees, and the circumferential stress is more obvious. Grouting makes the circumferential stress peak transfer from the wall of the cavern to the roof and floor of the cavern, which is beneficial to the stability of the cavern. The radial displacement around the cavern also decreases. The displacement of the wall decreases by approximately 24.0%, and the radial displacement of the roof and floor decreases by approximately 61.8%.

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Section: Introductionmentioning

confidence: 99%

Analytical Solution of the Grouting Reinforcement Response of a Circular Cavern in Deeply Buried Fractured Surrounding Rock under a Nonuniform Stress Field

Liu

Lyu

et al. 2022

ACS Omega

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“…To increase permeability and protect the lining structure and the environment, the surrounding rock of the tunnel can be strengthened by grouting. Traditional grouting materials have good water-plugging and reinforcement effects in static environments, but the disadvantages of a slow setting time, dispersion resistance, and weak crack resistance of the traditional slurry will lead to a poor grouting effect in high-water-pressure and moving environments [3][4][5][6]. Therefore, an important research goal is to improve traditional cement-based grouting materials to meet the grouting requirements under high water pressure and in a dynamic water environment and to improve the application range of building materials.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Performance of Modified Cement-Based Building Materials under High-Water-Pressure Surrounding Rock Environment

et al. 2023

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Traditional cement-based grouting materials have good reinforcement and anti-seepage effects on the surrounding rock under normal conditions, but the grouting effect is not ideal due to problems such as a long setting time, a low stone ratio, and poor crack resistance under high water pressure and in a dynamic water environment. In this study, we aimed to improve the physical properties, chemical properties, and microstructure of a cement-based slurry by forming a hydrogel through its chemical crosslinking with polyvinyl alcohol and boric acid as modifiers for the purpose of improving the permeability resistance of the surrounding rock grouting under high-water-pressure conditions, which can expand the function of traditional building materials. The grouting effect of the modified cementitious material on the surrounding rock was analyzed through indoor tests, the SEM testing of the performance of the modified slurry, the numerical calculation of the seepage field, and the application of the modified slurry in combination with the actual project to verify the water-plugging effect. The research findings demonstrate that (1) the additives boric acid and PVA can significantly speed up the slurry gel time, and the gel time can be controlled within 2–20 min to meet the specification requirements. (2) At a velocity of moving water > 1 m/s, the retention of the solidified modified slurry stone body reaches more than 80%. According to the SEM analysis, the structure of the solidified modified slurry stone body is dense and has good impermeability. (3) According to the numerical calculation analysis, the modified slurry can effectively change the seepage field of the surrounding rock and improve its seepage resistance. The water pressure outside the lining is reduced by 47%, 31%, and 22%, respectively, compared with no slurry, the pure cement slurry, and cement–water-glass grouting, and the indoor test and numerical simulation conclusions are consistent.

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Penetration mechanism of grouting by using the cement-based slurry with time-dependent viscosity

Wang,

Zhang,

Liu

et al. 2024

Arch Appl Mech

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Field validation of a detectable, magnetic, cementitious grout for rock fracture grouting

Cited by 5 publications

References 14 publications

Analytical Solution of the Grouting Reinforcement Response of a Circular Cavern in Deeply Buried Fractured Surrounding Rock under a Nonuniform Stress Field

Analytical Solution of the Grouting Reinforcement Response of a Circular Cavern in Deeply Buried Fractured Surrounding Rock under a Nonuniform Stress Field

Experimental Study on Performance of Modified Cement-Based Building Materials under High-Water-Pressure Surrounding Rock Environment

Penetration mechanism of grouting by using the cement-based slurry with time-dependent viscosity

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