Grouting Diffusion Characteristics in Faults Considering the Interaction of Multiple Grouting

Li, Peng; Zhang, Qingsong; Zhang, Xiao; Li, Shucai; Li, Xianghui; Zuo, Jinxin

doi:10.1061/(asce)gm.1943-5622.0000815

Cited by 24 publications

(9 citation statements)

References 7 publications

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“…As a common treatment method for antiseepage, plugging, and reinforcement of underground engineering, grouting methods are widely used in mine water plugging and reinforcement, water and mud inrush treatment in tunnel fault fracture zones, foundation pit supports, dam reinforcement, and other fields [1][2][3]. Grouting in deep and loose layers has the typical "three high characteristics" of high ground stress, high permeability, and high grouting pressure [4,5]. In addition, the uncertainty of the change in soil layer properties during the deposition process leads to many modes of slurry diffusion, such as splitting, permeability, and compaction, and its diffusion mechanism and design theory have significantly lag between engineering practice and research [6,7].…”

Section: Introductionmentioning

confidence: 99%

Theoretical Research on Grouting in Deep Loose Layers Based on the Cylindrical Diffusion Model of Radial Tube Flow

et al. 2022

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Grouting in deep, loose layers are a complex process in which many modes such as infiltration, splitting, and compaction coexist. It is of great significance to establish a realistic, simplified physical model to study the law of slurry diffusion. Herein, a cylindrical diffusion model of radial tube flow is established, and the control differential equations of both the Bingham slurry diffusion velocity in a single tube and the diffusion velocity of the radial tube flow are deduced. Additionally, the calculation formulas for the diffusion radius and slurry pressure distribution function are obtained. The rationality of the theory is verified by combining our results with those of the field grouting test of the Guotun coal mine. The results show that the cylindrical diffusion model of radial tube flow can successfully characterize the slurry diffusion law of grouting in a deep, loose layer. The slurry pressure attenuation shows distinguishable stages: within the first 30% of the diffusion radius, the slurry pressure decreased sharply by approximately 70%, and the slurry pressure decreases slowly in the later stages. Furthermore, the diffusion radius has a nonlinear, negative correlation with the height of the grouting section and the comprehensive injection rate of formation; the change rate is relatively more gradual, and there are no distinguishable stages. The research results provide a theoretical basis for reasonably determining the grouting parameters of deep, loose layers in the future.

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Section: Introductionmentioning

confidence: 99%

Theoretical Research on Grouting in Deep Loose Layers Based on the Cylindrical Diffusion Model of Radial Tube Flow

et al. 2022

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“…The grouting process is a process in which grout seepage and rock deformation are coupled together. Especially when the fracture opening is small, the fluid-solid coupling within the grouting process will be more significant [23,24]. The cement slurry enters the fracture due to grouting pressure, and the grouting pressure causes fracture to deform, changing the fracture opening and leading to variations in seepage characteristics [25,26].…”

Section: Introductionmentioning

confidence: 99%

Study on Seepage Simulation of High Pressure Grouting in Microfractured Rock Mass

Wang

Ren

et al. 2021

Geofluids

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In coal mines, under high in situ stress and strong mining activity, roadway surrounding rock commonly contains large amounts of larger fractures and microfractures. Along with the large deformation and continuous rheology of the soft rock roadway, the fractures in the surrounding rock are likely to be compressed and closed, forming undeveloped microfractures, which hinder conventional grouting support methods. Based on the fluid-solid coupling between slurry seepage and microfracture deformation, a theoretical model of microfracture grouting seepage is established. A program for the analysis and calculation of microfracture grouting is developed to quantitatively describe the variation in slurry seepage distance and fracture opening. Numerical experiments are carried out to study the grouting seepage of microfractures under different grouting pressures and fracture opening conditions, and the variation rules for the spatial distribution of fracture opening and slurry seepage distance during grouting pressure are obtained. Fluid-solid coupling has a significant influence on grout seepage characteristics. The grouting pressure and the fracture opening changes are nonlinearly attenuated along the grout seepage direction.

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“…The split mechanism is mainly concerned with the starting split conditions and the threshold of split pressure [28,29]. The empirical solutions are obtained by the model test or field test [30][31][32], and the analytical solutions are deduced based on the tension failure, shear failure and other failure criteria to obtain theoretical models [33,34]. For the propagation paths characteristics of the grouting split, Li et al [35], Zou et al [36] and Zhang et al [37] adopt constitutive models of the Newtonian fluid, the Bingham fluid or the Power-law fluid to obtain the relationship between the diffusion radius of the grouting split and the grouting pressure respectively.…”

Section: Introductionmentioning

confidence: 99%

The Analytical Solution of the Grouting Migration Height for the Post-Grouted Drilled Shaft Based on the Herschel-Bulkley Model

Nan¹,

Liu²,

Zhang³

et al. 2021

Preprint

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The traditional bored pile technology has some arduous problems, such as the sediment at the pile tip, the mud skin along the pile shaft, and the stress release due to borehole construction. The post-grouted technology at the pile tip of bored pile has emerged because of demand. The grouting migration height (GMH) is of great significance to the strengthen and reinforcement of the pile foundation. This paper derives the calculation formula of the GMH based on the theory of the column hole expansion and Herschel-Bulkley model. The influence of relevant parameters on the GMH is discussed. Aiming at the problem of the grouting migration along the pile shaft in layered soils, the iterative calculation method of the GMH is proposed. The correctness of the GMH is verified by an engineering case, which can guide the engineering practice. The result shows that the GMH increases with the increase of the grouting pressure, the pile diameter and the thickness of the mud skin, and the grouting pressure is positively correlated with the GMH. The GMH decreases with the increase of the buried depth, the consistency coefficient and the rheological index. On this basis, the correctness of the GMH is verified by an engineering case.

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Grouting Diffusion Characteristics in Faults Considering the Interaction of Multiple Grouting

Cited by 24 publications

References 7 publications

Theoretical Research on Grouting in Deep Loose Layers Based on the Cylindrical Diffusion Model of Radial Tube Flow

Theoretical Research on Grouting in Deep Loose Layers Based on the Cylindrical Diffusion Model of Radial Tube Flow

Study on Seepage Simulation of High Pressure Grouting in Microfractured Rock Mass

The Analytical Solution of the Grouting Migration Height for the Post-Grouted Drilled Shaft Based on the Herschel-Bulkley Model

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