Grout diffusion model in porous media considering the variation in viscosity with time

Hou, Fujin; Sun, Keguo; Wu, Qingdong; Xu, Weiping; Ren, Sijia

doi:10.1177/1687814018819890

Cited by 15 publications

(6 citation statements)

References 25 publications

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“…Moreover, Chinese scholars have also researched the influence of the time-varying characteristics of the cement grout on the diffusion law. Yang (2005a, b) and Hou (2019) considered the time-varying cement grout and revealed the diffusion law of time-varying Bingham fluid in porous media. However, due to the computer simulation level at that time, the simulation results of the above scholars only stayed at the level of a 1D or two-dimensional (2D) generalized model, which could not be closely combined with the actual project.…”

Section: The Research Status On Numerical Simulation Of Rock Groutingmentioning

confidence: 99%

The numerical simulation of rock mass grouting: a literature review

Tong

Yang

Duan

et al. 2021

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PurposeThe purpose of this article is to understand the current research status and future development trends in the field of numerical simulation on rock mass grouting.Design/methodology/approachThis article first searched the literature database (EI, Web of Science, CNKI, etc.) for keywords related to the numerical simulation of rock mass grouting to obtain the initial literature database. Then, from the initial database, several documents with strong relevance to the numerical simulation theme of rock mass grouting and high citation rate were selected; some documents from the references were selected as supplements, forming the sample database of this review study (a total of 90 articles). Finally, through sorting out the relationship among the literature, this literature review was carried out.FindingsThe numerical simulation of rock mass grouting is mainly based on the porous media model and the fractured media model. It has experienced the development process from Newtonian fluid to non-Newtonian fluid, from time-invariant viscosity to time-varying viscosity, and from generalized theoretical model to engineering application model. Based on this, this article summarizes four scientific problems that need to be solved in the future in this research field: the law of grout distribution at the cross fissures, the grout diffusion mechanism under multi-field coupling, more accurate grouting theoretical model and simulation technology with strong engineering applicability.Originality/valueThis research systematically analyzes the current research status and shortcomings of numerical simulation on rock mass grouting, summarizes four key issues in the future development of this research field and provides new ideas for the future research on numerical simulation on rock mass grouting.

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Section: The Research Status On Numerical Simulation Of Rock Groutingmentioning

confidence: 99%

The numerical simulation of rock mass grouting: a literature review

Tong

Yang

Duan

et al. 2021

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“…Some previous findings suggested that grout permeates in the laminar flow state when it is injected into the ground. Regarding the spherical diffusion model, the pores of soil layers can be considered as radial capillary tubes from center of sphere outward [35,40,41]. e size of capillary channels in the sandy layer varies significantly, and it is extremely difficult to reveal the real state through a mathematical model.…”

Section: General and Basicmentioning

confidence: 99%

“…e viscosity of cement-based grout is featured by the time-varying property. During cement hydration, the viscosity and viscous resistance of grout increase over time, causing an adverse impact on grout diffusion [41]. When grout is injected into the soil, part of cement particles is blocked by skeleton of soil particles, resulting in stagnation and filtration of these cement particles as well as decrease of grout concentration and blockage of the soil pores.…”

Section: Advances In Materials Science and Engineeringmentioning

confidence: 99%

Modelling of Permeation Grouting considering Grout Self-Gravity Effect: Theoretical and Experimental Study

Wang

Zhang

et al. 2019

Advances in Materials Science and Engineering

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Self-gravity is one key parameter for behavior characterization of grout permeation and diffusion.is study proposes mathematical models for permeation grouting with consideration of grout self-gravity effect. e models concerning power law, Bingham, and Newtonian grouts are based on the generalized Darcy's law and spherical diffusion theory. In addition, a prediction model of grout concretion dimension used for Bingham grout was developed. An analysis of the injection pressure distribution law and a comparative evaluation of diffusion radius considering self-gravity effect using established models were conducted subsequently. Moreover, grouting experiments were performed to check and verify the prediction model. e experimental results showed that injection pressure decreases linearly with increase of diffusion radius for the power-law grout, while nonlinear decrease of injection pressure was confirmed in Bingham and Newtonian grouts in this case. ree grouts approximately diffuse in an "ellipsoidal" shape, and it is confirmed that the diffusion radius is closely related to grout self-gravity. e Newtonian grout produces the maximum diffusion radius compared with the other two grouts whether the gravity effects were considered or not. e grout quantity under a smaller water-to-cement (w/c) ratio exhibits a significant difference and undergoes two increasing stages, whereas the quantity simply tends to be stable after it reaches its maximum in terms of the larger (w/c) ratios. e constructed dimension prediction model agrees well with the experimental results, which can be helpful for design and assessment of the grouting scheme.

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“…Predecessors have achieved plentiful and substantial outcomes of the research on grouting. To name a few, in terms of grouting theory, the classical permeation grouting theory, compaction grouting theory, fracture grouting theory, and their optimization are proposed [7][8][9][10][11][12][13][14]; in terms of grouting material, such as cement-based slurry, sodium silicate, silica sol, and other optimized slurry materials were studied [15][16][17][18][19][20]; in terms of diffusion mechanism of grouting slurry, the slurry diffusion mechanism has been studied considering the time-varying characteristics of viscosity [21][22][23], temperature-varying characteristics [24,25], and multi-field coupling [26,27]. In the research on permeation grouting with broken surrounding rock, Pan D.J.…”

Section: Introductionmentioning

confidence: 99%

Advanced Grouting Model and Influencing Factors Analysis of Tunnels with High Stress and Broken Surrounding Rock

Jiang

Pan²,

Zhang³

et al. 2022

Water

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Grouting can effectively seal and reinforce broken rock masses in deep geotechnical engineering, which have an important impact on groundwater-related disaster prevention and control. Based on multi-field coupling mechanics and rotational viscosity experiments, an advance grouting migration model of cement slurry in tunnels with high-stress broken surrounding rock is built against the background of the Xianglushan Tunnel for water diversion in central Yunnan Province. The influence characteristics of water–cement ratio, grouting pressure, and initial permeability on the process of grouting material migration are analyzed by combining classical column theory and spherical theory. The results show the following: Overall, the growth rate of grouting radius is fast during the earlier 5 min and slows down later. At the fifth minute, the normal grouting ranges are 22 cm, 51 cm, and 58 cm, at water–cement ratios 0.6, 0.8, and 1.0, respectively, while the normal grouting ranges are 58 cm, 51 cm, and 36 cm at grouting pressures 2 MPa, 1 MPa, and 0.5 MPa, respectively; the normal grouting ranges are 58 cm, 24 cm, and 11 cm at initial permeabilities 5D, 0.5D, and 0.05D, respectively. At the 60th minute, the normal grouting ranges are 47 cm, 133 cm, and 155 cm at water–cement ratios 0.6, 0.8, and 1.0, respectively; the normal grouting ranges are 155 cm, 131 cm, and 96 cm at grouting pressures 2 MPa, 1 MPa, and 0.5 MPa, respectively; meanwhile, the normal grouting ranges are 155 cm, 63 cm, and 29 cm at initial permeabilities 5D, 0.5D, and 0.05D, respectively. This study can provide theoretical guidance for on-site grouting design in unfavorable geological treatment projects.

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Grout diffusion model in porous media considering the variation in viscosity with time

Cited by 15 publications

References 25 publications

The numerical simulation of rock mass grouting: a literature review

The numerical simulation of rock mass grouting: a literature review

Modelling of Permeation Grouting considering Grout Self-Gravity Effect: Theoretical and Experimental Study

Advanced Grouting Model and Influencing Factors Analysis of Tunnels with High Stress and Broken Surrounding Rock

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