Performance and Mechanism of Double-Row Capsule Grouting to Protect Tunnels Adjacent to Excavation
Publication: International Journal of Geomechanics
Volume 24, Issue 9
Abstract
A new grouting technique, double-row capsule grouting (DRCG), has been developed and implemented in practice. This grouting technique could effectively mitigate excavation-induced tunnel movement and ensure the serviceability of metro lines. However, its control mechanism and the factors that influence its performance are not fully understood. Based on a case history that utilized capsule grouting the precision of the numerical model is validated. Parametric studies are conducted to investigate the influence of the grouting location and volume on the tunnel deformation, bending moment, restoration ratio, and shear strain of the soil. In addition, a comprehensive comparison between the conventional grouting technique and DRCG is performed to illustrate the control mechanism of this innovative technique. The results could contribute to a better understanding of the factors that impact the performance of DRCG and an optimal application of DRCG, which facilitates its efficient implementation and further development in engineering.
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Data Availability Statement
All data, models, or codes that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This research is funded by the Science and Technology Research and Development Project of the China State Construction Engineering Group (Grant Numbers CSCEC-2020-Z-46, CSCEC-2020-Z-41, and CSCEC6B-2023-Z-12).
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Information & Authors
Information
Published In
International Journal of Geomechanics
Volume 24 • Issue 9 • September 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Jul 26, 2023
Accepted: Mar 4, 2024
Published online: Jun 27, 2024
Published in print: Sep 1, 2024
Discussion open until: Nov 27, 2024
ASCE Technical Topics:
- Business management
- Case studies
- Construction engineering
- Construction methods
- Continuum mechanics
- Deformation (mechanics)
- Engineering fundamentals
- Engineering mechanics
- Excavation
- Geotechnical engineering
- Grouting
- Methodology (by type)
- Mitigation and remediation
- Models (by type)
- Numerical models
- Practice and Profession
- Research methods (by type)
- Soil deformation
- Solid mechanics
- Structural mechanics
- Tunnels
Authors
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