Spherical Permeation Grouting Model of a Power-Law Fluid Considering the Soil Unloading Effect
Publication: International Journal of Geomechanics
Volume 24, Issue 2
Abstract
Previous studies have given little consideration to the influence of soil unloading effect on permeation grouting. A spherical permeation diffusion model considering the influence of soil unloading effect was established based on the theory of spherical permeation grouting to study the permeability and diffusion characteristics of a power-law fluid in unloaded soil. The permeation grouting model was compared and verified with the grout diffusion experiment conducted in the unloaded soil. A parametric analysis with the proposed model was performed. The result shows that the final diffusion radius of the grout increases with the increase of soil unloading degree, grouting pressure, water–cement ratio, and initial permeability coefficient but decreases with the increase of underground water pressure. The increment value of grouting pressure is equal to the increment value of underground water pressure under the same grouting time and grout diffusion radius. The influence of soil stress history, soil initial permeability coefficient, underground water pressure, and water–cement ratio should be comprehensively considered to determine the reinforcement range of permeation grouting. The proposed permeation grouting diffusion model is suitable for sandy soil with normal loading and unloading conditions, and the results analyzed by this model can provide some theoretical guidance for the tunnel vault grouting and bored pile postgrouting process.
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Data Availability Statement
All data, models, and codes generated or used during the study appear in the published article.
Acknowledgments
This work was supported by the Natural Science Foundation of Chongqing under Grant No. CSTB2023NSCQ-BHX0149, the China Postdoctoral Science Foundation under Grant No. 2023MD734112, the Special Funding of Chongqing Postdoctoral Research Project under Grant No. 2022CQBSHTB3051, the Science and Technology Research Program of Chongqing Municipal Education Commission under Grant No. KJQN202100705, the Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education Tongji University under Grant No. KLE-TJGE-G2201, the National Natural Science Foundation of China under Grant Nos. U1965108 and 41672265, and the Cooperation Projects between Undergraduate University in Chongqing and Affiliated Institutes of the Chinese Academy of Sciences under Grant No. HZ2021009. The authors are deeply grateful for this support. The comments of the anonymous reviewers have improved the quality of this paper and are also gratefully acknowledged.
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International Journal of Geomechanics
Volume 24 • Issue 2 • February 2024
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© 2023 American Society of Civil Engineers.
History
Received: Apr 11, 2023
Accepted: Jul 29, 2023
Published online: Nov 17, 2023
Published in print: Feb 1, 2024
Discussion open until: Apr 17, 2024
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