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Article

A Simplified Theoretical Method for Estimating the Effect of Capsule Grouting Expansion Technology on Controlling Pile Deformation

1
Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China
2
Engineering Research Center of Urban Underground Development of Zhejiang Province, Hangzhou 310058, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2024, 14(13), 5449; https://doi.org/10.3390/app14135449
Submission received: 22 May 2024 / Revised: 2 June 2024 / Accepted: 7 June 2024 / Published: 23 June 2024

Abstract

Deep excavation and shield tunneling processes often induce significant deformation in adjacent existing pile foundations, posing risks to the safety of superstructures. To address this issue, capsule grouting expansion technology has emerged as an efficient and economical technology to actively control pile deformation during such construction activities. This technology has been applied in some engineering projects aimed at safeguarding nearby buildings or facilities. However, theoretical research on capsule grouting expansion technology is limited and lags behind its practical engineering application. This paper proposed a simplified theoretical approach for estimating the effect of capsule grouting expansion technology on the deformation of neighboring pile foundations. Initially, virtual image technology was employed to obtain an analytical solution for the lateral displacement of soil resulting from the expansion of a cylindrical cavity with infinite height. The pile was considered as an Euler–Bernoulli beam on a Winkler foundation, allowing for the calculation of the loading response of the existing pile foundation. Utilizing the two-stage method, the theoretical analytical method of the lateral deformation of the pile shaft caused by capsule expansion was obtained. The reliability of the proposed theoretical method was verified by comparing the measured and calculated results. Further investigation into the controlling effect of the capsule grouting expansion technology on the deformation of the pile foundation was conducted through parametric analyses. These analyses encompass capsule radius, the distance between the capsule and pile foundation, the depth of the capsule, the length of the capsule, and the pile base constraints.
Keywords: capsule grouting; virtual image technology; pile deformation; two-stage method capsule grouting; virtual image technology; pile deformation; two-stage method

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MDPI and ACS Style

Yu, J.; Guo, J.; Zhou, J.; Hu, H.; Gong, X. A Simplified Theoretical Method for Estimating the Effect of Capsule Grouting Expansion Technology on Controlling Pile Deformation. Appl. Sci. 2024, 14, 5449. https://doi.org/10.3390/app14135449

AMA Style

Yu J, Guo J, Zhou J, Hu H, Gong X. A Simplified Theoretical Method for Estimating the Effect of Capsule Grouting Expansion Technology on Controlling Pile Deformation. Applied Sciences. 2024; 14(13):5449. https://doi.org/10.3390/app14135449

Chicago/Turabian Style

Yu, Jianlin, Jin Guo, Jiajin Zhou, Haibo Hu, and Xiaonan Gong. 2024. "A Simplified Theoretical Method for Estimating the Effect of Capsule Grouting Expansion Technology on Controlling Pile Deformation" Applied Sciences 14, no. 13: 5449. https://doi.org/10.3390/app14135449

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